Zyxel Communications Switch Xgs 4728F Users Manual ZyBook2

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XGS-4728F
Intelligent Layer 3+ Switch

Default Login Details
IP Address

http://192.168.0.1
(Out-of-band
MGMT port)
http://192.168.1.1
(In-band ports)

User Name

admin

Password

1234

www.zyxel.com

Firmware Version 3.90
Edition 2, 04/2010

www.zyxel.com

Copyright © 2010
ZyXEL Communications Corporation

About This User's Guide

About This User's Guide
Intended Audience
This manual is intended for people who want to configure the Switch using the
web configurator.

Related Documentation
• Web Configurator Online Help
The embedded Web Help contains descriptions of individual screens and
supplementary information.
• Command Reference Guide
The Command Reference Guide explains how to use the Command-Line
Interface (CLI) and CLI commands to configure the Switch.

Note: It is recommended you use the web configurator to configure the Switch.
• Support Disc
Refer to the included CD for support documents.

Documentation Feedback
Send your comments, questions or suggestions to: techwriters@zyxel.com.tw
Thank you!
The Technical Writing Team, ZyXEL Communications Corp.,
6 Innovation Road II, Science-Based Industrial Park, Hsinchu, 30099, Taiwan.

Need More Help?
More help is available at www.zyxel.com.

XGS-4728F User’s Guide

3

About This User's Guide
• Download Library
Search for the latest product updates and documentation from this link. Read
the Tech Doc Overview to find out how to efficiently use the User Guide, Quick
Start Guide and Command Line Interface Reference Guide in order to better
understand how to use your product.
• Knowledge Base
If you have a specific question about your product, the answer may be here.
This is a collection of answers to previously asked questions about ZyXEL
products.
• Forum
This contains discussions on ZyXEL products. Learn from others who use ZyXEL
products and share your experiences as well.

Customer Support
Should problems arise that cannot be solved by the methods listed above, you
should contact your vendor. If you cannot contact your vendor, then contact a
ZyXEL office for the region in which you bought the device.
See http://www.zyxel.com/web/contact_us.php for contact information. Please
have the following information ready when you contact an office.
• Product model and serial number.
• Warranty Information.
• Date that you received your device.
• Brief description of the problem and the steps you took to solve it.

4

XGS-4728F User’s Guide

Document Conventions

Document Conventions
Warnings and Notes
These are how warnings and notes are shown in this User’s Guide.

Warnings tell you about things that could harm you or your device.
Note: Notes tell you other important information (for example, other things you may
need to configure or helpful tips) or recommendations.

Syntax Conventions
• The XGS-4728F may be referred to as the “Switch”, the “device”, the “system”
or the “product” in this User’s Guide.
• Product labels, screen names, field labels and field choices are all in bold font.
• A key stroke is denoted by square brackets and uppercase text, for example,
[ENTER] means the “enter” or “return” key on your keyboard.
• “Enter” means for you to type one or more characters and then press the
[ENTER] key. “Select” or “choose” means for you to use one of the predefined
choices.
• A right angle bracket ( > ) within a screen name denotes a mouse click. For
example, Maintenance > Log > Log Setting means you first click
Maintenance in the navigation panel, then the Log sub menu and finally the
Log Setting tab to get to that screen.
• Units of measurement may denote the “metric” value or the “scientific” value.
For example, “k” for kilo may denote “1000” or “1024”, “M” for mega may
denote “1000000” or “1048576” and so on.

XGS-4728F User’s Guide

5

Document Conventions

Icons Used in Figures
Figures in this User’s Guide may use the following generic icons. The Switch icon is
not an exact representation of your device.

6

The Switch

Computer

Notebook computer

Server

DSLAM

Firewall

Telephone

Switch

Router

XGS-4728F User’s Guide

Safety Warnings

Safety Warnings
• Do NOT use this product near water, for example, in a wet basement or near a swimming
pool.
• Do NOT expose your device to dampness, dust or corrosive liquids.
• Do NOT store things on the device.
• Do NOT install, use, or service this device during a thunderstorm. There is a remote risk
of electric shock from lightning.
• Connect ONLY suitable accessories to the device.
• Do NOT open the device or unit. Opening or removing covers can expose you to
dangerous high voltage points or other risks. ONLY qualified service personnel should
service or disassemble this device. Please contact your vendor for further information.
• For continued protection against risk of fire replace only with same type and rating of
fuse.
• Make sure to connect the cables to the correct ports.
• Place connecting cables carefully so that no one will step on them or stumble over them.
• Always disconnect all cables from this device before servicing or disassembling.
• Use ONLY an appropriate power adaptor or cord for your device. Connect it to the right
supply voltage (for example, 110V AC in North America or 230V AC in Europe).
• Do NOT allow anything to rest on the power adaptor or cord and do NOT place the
product where anyone can walk on the power adaptor or cord.
• Do NOT use the device if the power adaptor or cord is damaged as it might cause
electrocution.
• If the power adaptor or cord is damaged, remove it from the device and the power
source.
• Do NOT attempt to repair the power adaptor or cord. Contact your local vendor to order a
new one.
• Do not use the device outside, and make sure all the connections are indoors. There is a
remote risk of electric shock from lightning.
• Do NOT obstruct the device ventilation slots, as insufficient airflow may harm your
device.
Your product is marked with this symbol, which is known as the WEEE mark. WEEE
stands for Waste Electronics and Electrical Equipment. It means that used electrical
and electronic products should not be mixed with general waste. Used electrical
and electronic equipment should be treated separately.

XGS-4728F User’s Guide

7

Safety Warnings

8

XGS-4728F User’s Guide

Contents Overview

Contents Overview
Introduction ............................................................................................................................ 23
Getting to Know Your Switch ..................................................................................................... 25
Hardware Installation and Connection ....................................................................................... 31
Hardware Overview ................................................................................................................... 35

Basic Configuration ............................................................................................................... 43
The Web Configurator ............................................................................................................... 45
Initial Setup Example ................................................................................................................. 55
Tutorials ..................................................................................................................................... 61
System Status and Port Statistics .............................................................................................. 71
Basic Setting ............................................................................................................................. 77

Advanced Setup ..................................................................................................................... 93
VLAN ......................................................................................................................................... 95
Static MAC Forward Setup .......................................................................................................115
Static Multicast Forward Setup .................................................................................................119
Filtering .................................................................................................................................... 123
Spanning Tree Protocol ........................................................................................................... 125
Bandwidth Control ................................................................................................................... 145
Broadcast Storm Control ......................................................................................................... 149
Mirroring .................................................................................................................................. 151
Link Aggregation ...................................................................................................................... 153
Port Authentication .................................................................................................................. 163
Port Security ............................................................................................................................ 169
Classifier .................................................................................................................................. 173
Policy Rule .............................................................................................................................. 179
Queuing Method ...................................................................................................................... 187
VLAN Stacking ......................................................................................................................... 191
Multicast .................................................................................................................................. 199
AAA ......................................................................................................................................... 215
IP Source Guard ...................................................................................................................... 231
Loop Guard .............................................................................................................................. 255
VLAN Mapping ........................................................................................................................ 259
Layer 2 Protocol Tunneling ...................................................................................................... 263
Private VLAN ........................................................................................................................... 267

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9

Contents Overview

IP Application ....................................................................................................................... 271
Static Route ............................................................................................................................. 273
RIP ........................................................................................................................................... 275
OSPF ....................................................................................................................................... 277
IGMP ....................................................................................................................................... 291
DVMRP .................................................................................................................................... 295
Differentiated Services ............................................................................................................. 299
DHCP ...................................................................................................................................... 307
VRRP ....................................................................................................................................... 317

Management ......................................................................................................................... 327
Maintenance ............................................................................................................................ 329
Access Control ........................................................................................................................ 337
Diagnostic ................................................................................................................................ 357
Syslog ...................................................................................................................................... 359
Cluster Management ............................................................................................................... 363
MAC Table ............................................................................................................................... 371
IP Table .................................................................................................................................... 375
ARP Table ................................................................................................................................ 379
Routing Table ........................................................................................................................... 381
Configure Clone ....................................................................................................................... 383

Troubleshooting & Product Specifications ....................................................................... 385
Troubleshooting ....................................................................................................................... 387
Product Specifications ............................................................................................................. 393

Appendices and Index ......................................................................................................... 403

10

XGS-4728F User’s Guide

Table of Contents

Table of Contents
About This User's Guide .......................................................................................................... 3
Document Conventions............................................................................................................ 5
Safety Warnings........................................................................................................................ 7
Contents Overview ................................................................................................................... 9
Table of Contents.................................................................................................................... 11

Part I: Introduction................................................................................. 23
Chapter 1
Getting to Know Your Switch................................................................................................. 25
1.1 Introduction .......................................................................................................................... 25
1.1.1 Bridging Example ....................................................................................................... 25
1.1.2 High Performance Switching Example ....................................................................... 26
1.1.3 Gigabit Ethernet to the Desktop ................................................................................. 27
1.1.4 IEEE 802.1Q VLAN Application Example .................................................................. 27
1.2 Ways to Manage the Switch ................................................................................................ 28
1.3 Good Habits for Managing the Switch ................................................................................. 28

Chapter 2
Hardware Installation and Connection ................................................................................. 31
2.1 Freestanding Installation ..................................................................................................... 31
2.2 Mounting the Switch on a Rack .......................................................................................... 32
2.2.1 Rack-mounted Installation Requirements .................................................................. 32
2.2.2 Attaching the Mounting Brackets to the Switch .......................................................... 32
2.2.3 Mounting the Switch on a Rack .................................................................................. 33

Chapter 3
Hardware Overview................................................................................................................. 35
3.1 Front Panel Connections .................................................................................................... 35
3.1.1 Dual Personality Interfaces ........................................................................................ 35
3.1.2 1000Base-T Ports ...................................................................................................... 36
3.1.3 Mini-GBIC Slots ......................................................................................................... 36
3.2 Rear Panel ........................................................................................................................... 38
3.2.1 Power Connector ....................................................................................................... 39

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Table of Contents

3.2.2 External Backup Power Supply Connector ................................................................ 41
3.2.3 Console Port ............................................................................................................. 41
3.3 LEDs

................................................................................................................................ 41

Part II: Basic Configuration................................................................... 43
Chapter 4
The Web Configurator ............................................................................................................ 45
4.1 Introduction .......................................................................................................................... 45
4.2 System Login

.................................................................................................................... 45

4.3 The Status Screen

.......................................................................................................... 46

4.3.1 Change Your Password

.......................................................................................... 51

4.4 Saving Your Configuration ................................................................................................... 51
4.5 Switch Lockout

.................................................................................................................. 52

4.6 Resetting the Switch

......................................................................................................... 52

4.6.1 Reload the Configuration File .................................................................................... 52
4.7 Logging Out of the Web Configurator ................................................................................. 54
4.8 Help .................................................................................................................................... 54

Chapter 5
Initial Setup Example.............................................................................................................. 55
5.1 Overview .............................................................................................................................. 55
5.1.1 Configuring an IP Interface ........................................................................................ 55
5.1.2 Configuring DHCP Server Settings ............................................................................ 57
5.1.3 Creating a VLAN ........................................................................................................ 57
5.1.4 Setting Port VID ......................................................................................................... 59
5.1.5 Enabling RIP .............................................................................................................. 60

Chapter 6
Tutorials ................................................................................................................................... 61
6.1 How to Use DHCP Snooping on the Switch ........................................................................ 61
6.2 How to Use DHCP Relay on the Switch .............................................................................. 65
6.2.1 DHCP Relay Tutorial Introduction .............................................................................. 65
6.2.2 Creating a VLAN ........................................................................................................ 66
6.2.3 Configuring DHCP Relay ........................................................................................... 69
6.2.4 Troubleshooting ......................................................................................................... 69

Chapter 7
System Status and Port Statistics ......................................................................................... 71
7.1 Overview .............................................................................................................................. 71
7.2 Port Status Summary

12

...................................................................................................... 71

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7.2.1 Status: Port Details

................................................................................................ 73

Chapter 8
Basic Setting .......................................................................................................................... 77
8.1 Overview .............................................................................................................................. 77
8.2 System Information
8.3 General Setup

........................................................................................................... 78

................................................................................................................. 80

8.4 Introduction to VLANs ......................................................................................................... 82
8.4.1 Smart Isolation ........................................................................................................... 83
8.5 Switch Setup Screen .......................................................................................................... 84
8.6 IP Setup

............................................................................................................................ 86

8.6.1 IP Interfaces .............................................................................................................. 86
8.7 Port Setup ........................................................................................................................... 89

Part III: Advanced Setup........................................................................ 93
Chapter 9
VLAN ........................................................................................................................................ 95
9.1 Introduction to IEEE 802.1Q Tagged VLANs

.................................................................. 95

9.1.1 Forwarding Tagged and Untagged Frames ................................................................ 95
9.2 Automatic VLAN Registration ............................................................................................. 96
9.2.1 GARP ......................................................................................................................... 96
9.2.2 GVRP ......................................................................................................................... 96
9.3 Port VLAN Trunking ............................................................................................................ 97
9.4 Select the VLAN Type ........................................................................................................ 98
9.5 Static VLAN ......................................................................................................................... 98
9.5.1 VLAN Status .............................................................................................................. 99
9.5.2 VLAN Details ............................................................................................................ 100
9.5.3 Configure a Static VLAN

...................................................................................... 100

9.5.4 Configure VLAN Port Settings

.............................................................................. 102

9.6 Subnet Based VLANs ....................................................................................................... 103
9.7 Configuring Subnet Based VLAN

.................................................................................... 104

9.8 Protocol Based VLANs ..................................................................................................... 106
9.9 Configuring Protocol Based VLAN

.................................................................................. 107

9.10 Create an IP-based VLAN Example ................................................................................ 109
9.11 Port-based VLAN Setup

................................................................................................110

9.11.1 Configure a Port-based VLAN ................................................................................110

Chapter 10
Static MAC Forward Setup ................................................................................................... 115
10.1 Overview ...........................................................................................................................115

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Table of Contents

10.2 Configuring Static MAC Forwarding

............................................................................115

Chapter 11
Static Multicast Forward Setup............................................................................................ 119
11.1 Static Multicast Forwarding Overview ...............................................................................119
11.2 Configuring Static Multicast Forwarding ........................................................................... 120

Chapter 12
Filtering.................................................................................................................................. 123
12.1 Configure a Filtering Rule .............................................................................................. 123

Chapter 13
Spanning Tree Protocol........................................................................................................ 125
13.1 STP/RSTP Overview ..................................................................................................... 125
13.1.1 STP Terminology ................................................................................................... 125
13.1.2 How STP Works .................................................................................................... 126
13.1.3 STP Port States ..................................................................................................... 127
13.1.4 Multiple RSTP

...................................................................................................... 127

13.1.5 Multiple STP ........................................................................................................... 128
13.2 Spanning Tree Protocol Status Screen ............................................................................ 131
13.3 Spanning Tree Configuration .......................................................................................... 131
13.4 Configure Rapid Spanning Tree Protocol
13.5 Rapid Spanning Tree Protocol Status

..................................................................... 132

........................................................................... 134

13.6 Configure Multiple Rapid Spanning Tree Protocol
13.7 Multiple Rapid Spanning Tree Protocol Status
13.8 Configure Multiple Spanning Tree Protocol
13.9 Multiple Spanning Tree Protocol Status

........................................................ 136
.......................................................... 138

.................................................................. 140
..................................................................... 143

Chapter 14
Bandwidth Control................................................................................................................ 145
14.1 Bandwidth Control Overview

......................................................................................... 145

14.1.1 CIR and PIR ........................................................................................................... 145
14.2 Bandwidth Control Setup ................................................................................................. 146

Chapter 15
Broadcast Storm Control ..................................................................................................... 149
15.1 Broadcast Storm Control Setup ...................................................................................... 149

Chapter 16
Mirroring ................................................................................................................................ 151
16.1 Port Mirroring Setup ....................................................................................................... 151

Chapter 17
Link Aggregation .................................................................................................................. 153

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Table of Contents

17.1 Link Aggregation Overview ............................................................................................. 153
17.2 Dynamic Link Aggregation .............................................................................................. 153
17.2.1 Link Aggregation ID ............................................................................................... 154
17.3 Link Aggregation Status .................................................................................................. 155
17.4 Link Aggregation Setting ................................................................................................ 157
17.5 Link Aggregation Control Protocol

................................................................................ 159

17.6 Static Trunking Example .................................................................................................. 160

Chapter 18
Port Authentication............................................................................................................... 163
18.1 Port Authentication Overview ......................................................................................... 163
18.1.1 IEEE 802.1x Authentication ................................................................................... 163
18.1.2 MAC Authentication ............................................................................................... 164
18.2 Port Authentication Configuration .................................................................................... 165
18.2.1 Activate IEEE 802.1x Security

........................................................................... 166

18.2.2 Activate MAC Authentication ................................................................................. 167

Chapter 19
Port Security.......................................................................................................................... 169
19.1 About Port Security .......................................................................................................... 169
19.2 Port Security Setup .......................................................................................................... 170
19.3 VLAN MAC Address Limit .............................................................................................. 171

Chapter 20
Classifier................................................................................................................................ 173
20.1 About the Classifier and QoS .......................................................................................... 173
20.2 Configuring the Classifier ............................................................................................... 173
20.3 Viewing and Editing Classifier Configuration ................................................................... 176
20.4 Classifier Example ........................................................................................................... 178

Chapter 21
Policy Rule............................................................................................................................ 179
21.1 Policy Rules Overview .................................................................................................... 179
21.1.1 DiffServ .................................................................................................................. 179
21.1.2 DSCP and Per-Hop Behavior ................................................................................. 179
21.2 Configuring Policy Rules ................................................................................................. 180
21.3 Viewing and Editing Policy Configuration ........................................................................ 183
21.4 Policy Example ................................................................................................................ 185

Chapter 22
Queuing Method.................................................................................................................... 187
22.1 Queuing Method Overview ............................................................................................. 187
22.1.1 Strictly Priority ........................................................................................................ 187

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Table of Contents

22.1.2 Weighted Fair Queuing .......................................................................................... 187
22.1.3 Weighted Round Robin Scheduling (WRR) ........................................................... 188
22.2 Configuring Queuing ........................................................................................................ 189

Chapter 23
VLAN Stacking ...................................................................................................................... 191
23.1 VLAN Stacking Overview ................................................................................................ 191
23.1.1 VLAN Stacking Example ........................................................................................ 191
23.2 VLAN Stacking Port Roles ............................................................................................... 192
23.3 VLAN Tag Format ............................................................................................................ 193
23.3.1 Frame Format ........................................................................................................ 193
23.4 Configuring VLAN Stacking ............................................................................................. 194
23.4.1 Port-based Q-in-Q .................................................................................................. 195
23.4.2 Selective Q-in-Q .................................................................................................... 196

Chapter 24
Multicast ................................................................................................................................ 199
24.1 Multicast Overview ......................................................................................................... 199
24.1.1 IP Multicast Addresses ........................................................................................... 199
24.1.2 IGMP Filtering ........................................................................................................ 199
24.1.3 IGMP Snooping ..................................................................................................... 200
24.1.4 IGMP Snooping and VLANs ................................................................................... 200
24.2 Multicast Status .............................................................................................................. 200
24.3 Multicast Setting ............................................................................................................. 201
24.4 IGMP Snooping VLAN .................................................................................................... 203
24.5 IGMP Filtering Profile ..................................................................................................... 205
24.6 MVR Overview ................................................................................................................ 207
24.6.1 Types of MVR Ports ............................................................................................... 207
24.6.2 MVR Modes ........................................................................................................... 208
24.6.3 How MVR Works .................................................................................................... 208
24.7 General MVR Configuration ............................................................................................ 209
24.8 MVR Group Configuration ...............................................................................................211
24.8.1 MVR Configuration Example .................................................................................. 212

Chapter 25
AAA ........................................................................................................................................ 215
25.1 Authentication, Authorization and Accounting (AAA) ...................................................... 215
25.1.1 Local User Accounts .............................................................................................. 216
25.1.2 RADIUS and TACACS+ ........................................................................................ 216
25.2 AAA Screens ................................................................................................................... 216
25.2.1 RADIUS Server Setup .......................................................................................... 217
25.2.2 TACACS+ Server Setup

..................................................................................... 219

25.2.3 AAA Setup .............................................................................................................. 221

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25.2.4 Vendor Specific Attribute ........................................................................................ 224
25.2.5 Tunnel Protocol Attribute ........................................................................................ 225
25.3 Supported RADIUS Attributes ......................................................................................... 226
25.3.1 Attributes Used for Authentication .......................................................................... 226
25.3.2 Attributes Used for Accounting ............................................................................... 227

Chapter 26
IP Source Guard.................................................................................................................... 231
26.1 IP Source Guard Overview .............................................................................................. 231
26.1.1 DHCP Snooping Overview ..................................................................................... 232
26.1.2 ARP Inspection Overview ...................................................................................... 234
26.2 IP Source Guard .............................................................................................................. 235
26.3 IP Source Guard Static Binding ....................................................................................... 236
26.4 DHCP Snooping .............................................................................................................. 238
26.5 DHCP Snooping Configure .............................................................................................. 241
26.5.1 DHCP Snooping Port Configure ............................................................................. 243
26.5.2 DHCP Snooping VLAN Configure .......................................................................... 244
26.6 ARP Inspection Status ..................................................................................................... 246
26.6.1 ARP Inspection VLAN Status ................................................................................. 247
26.6.2 ARP Inspection Log Status .................................................................................... 248
26.7 ARP Inspection Configure ............................................................................................... 249
26.7.1 ARP Inspection Port Configure .............................................................................. 251
26.7.2 ARP Inspection VLAN Configure ........................................................................... 253

Chapter 27
Loop Guard............................................................................................................................ 255
27.1 Loop Guard Overview ..................................................................................................... 255
27.2 Loop Guard Setup ........................................................................................................... 257

Chapter 28
VLAN Mapping ...................................................................................................................... 259
28.1 VLAN Mapping Overview ............................................................................................... 259
28.1.1 VLAN Mapping Example ........................................................................................ 259
28.2 Enabling VLAN Mapping ................................................................................................. 260
28.3 Configuring VLAN Mapping ............................................................................................. 261

Chapter 29
Layer 2 Protocol Tunneling.................................................................................................. 263
29.1 Layer 2 Protocol Tunneling Overview ............................................................................. 263
29.1.1 Layer 2 Protocol Tunneling Mode .......................................................................... 264
29.2 Configuring Layer 2 Protocol Tunneling .......................................................................... 265

Chapter 30
Private VLAN ......................................................................................................................... 267

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30.1 Private VLAN Overview .................................................................................................. 267
30.2 Configuring Private VLAN ................................................................................................ 268

Part IV: IP Application.......................................................................... 271
Chapter 31
Static Route ........................................................................................................................... 273
31.1 Configuring Static Routing ............................................................................................. 273

Chapter 32
RIP .......................................................................................................................................... 275
32.1 RIP Overview ................................................................................................................... 275
32.2 Configuring RIP ............................................................................................................... 275

Chapter 33
OSPF ...................................................................................................................................... 277
33.1 OSPF Overview .............................................................................................................. 277
33.1.1 OSPF Autonomous Systems and Areas ................................................................ 277
33.1.2 How OSPF Works .................................................................................................. 278
33.1.3 Interfaces and Virtual Links .................................................................................... 278
33.1.4 OSPF and Router Elections ................................................................................... 279
33.1.5 Configuring OSPF ................................................................................................. 279
33.2 OSPF Status

................................................................................................................. 280

33.3 OSPF Configuration ....................................................................................................... 282
33.4 Configure OSPF Areas ................................................................................................... 283
33.4.1 View OSPF Area Information Table ....................................................................... 284
33.5 Configuring OSPF Redistribution ................................................................................... 285
33.6 Configuring OSPF Interfaces .......................................................................................... 286
33.7 OSPF Virtual-Links

....................................................................................................... 288

Chapter 34
IGMP....................................................................................................................................... 291
34.1 IGMP Overview ............................................................................................................... 291
34.1.1 How IGMP Works ................................................................................................... 292
34.2 Port-based IGMP ............................................................................................................. 293
34.3 Configuring IGMP ............................................................................................................ 294

Chapter 35
DVMRP ................................................................................................................................... 295
35.1 DVMRP Overview ............................................................................................................ 295
35.2 How DVMRP Works ........................................................................................................ 295

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35.2.1 DVMRP Terminology ............................................................................................. 296
35.3 Configuring DVMRP ....................................................................................................... 296
35.3.1 DVMRP Configuration Error Messages ................................................................ 297
35.4 Default DVMRP Timer Values ........................................................................................ 298

Chapter 36
Differentiated Services ......................................................................................................... 299
36.1 DiffServ Overview ........................................................................................................... 299
36.1.1 DSCP and Per-Hop Behavior ................................................................................. 299
36.1.2 DiffServ Network Example .................................................................................... 300
36.2 Two Rate Three Color Marker Traffic Policing ................................................................. 300
36.2.1 TRTCM - Color-blind Mode .................................................................................... 301
36.2.2 TRTCM - Color-aware Mode .................................................................................. 301
36.3 Activating DiffServ .......................................................................................................... 302
36.3.1 Configuring 2-Rate 3 Color Marker Settings ......................................................... 303
36.4 DSCP-to-IEEE 802.1p Priority Settings

...................................................................... 305

36.4.1 Configuring DSCP Settings .................................................................................... 306

Chapter 37
DHCP...................................................................................................................................... 307
37.1 DHCP Overview ............................................................................................................. 307
37.1.1 DHCP Modes ........................................................................................................ 307
37.1.2 DHCP Configuration Options ................................................................................. 307
37.2 DHCP Status ................................................................................................................... 308
37.3 DHCP Server Status Detail ............................................................................................. 308
37.4 DHCP Relay ................................................................................................................... 310
37.4.1 DHCP Relay Agent Information ............................................................................. 310
37.4.2 Configuring DHCP Global Relay .............................................................................311
37.4.3 Global DHCP Relay Configuration Example .......................................................... 312
37.5 Configuring DHCP VLAN Settings

................................................................................ 313

37.5.1 Example: DHCP Relay for Two VLANs .................................................................. 315

Chapter 38
VRRP ...................................................................................................................................... 317
38.1 VRRP Overview .............................................................................................................. 317
38.2 VRRP Status .................................................................................................................... 318
38.3 VRRP Configuration ....................................................................................................... 319
38.3.1 IP Interface Setup ................................................................................................. 319
38.3.2 VRRP Parameters ................................................................................................. 321
38.3.3 Configuring VRRP Parameters .............................................................................. 322
38.3.4 Configuring VRRP Parameters .............................................................................. 323
38.4 VRRP Configuration Examples ...................................................................................... 323
38.4.1 One Subnet Network Example .............................................................................. 324

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38.4.2 Two Subnets Example ........................................................................................... 325

Part V: Management............................................................................. 327
Chapter 39
Maintenance .......................................................................................................................... 329
39.1 The Maintenance Screen ................................................................................................ 329
39.2 Load Factory Default ...................................................................................................... 330
39.3 Save Configuration .......................................................................................................... 330
39.4 Reboot System ................................................................................................................ 331
39.5 Firmware Upgrade ........................................................................................................... 331
39.6 Restore a Configuration File ............................................................................................ 332
39.7 Backup a Configuration File ............................................................................................ 333
39.8 FTP Command Line ........................................................................................................ 333
39.8.1 Filename Conventions .......................................................................................... 333
39.8.2 FTP Command Line Procedure ............................................................................ 334
39.8.3 GUI-based FTP Clients .......................................................................................... 335
39.8.4 FTP Restrictions .................................................................................................... 335

Chapter 40
Access Control...................................................................................................................... 337
40.1 Access Control Overview

............................................................................................ 337

40.2 The Access Control Main Screen .................................................................................... 337
40.3 About SNMP .................................................................................................................. 338
40.3.1 SNMP v3 and Security ........................................................................................... 339
40.3.2 Supported MIBs

................................................................................................... 339

40.3.3 SNMP Traps .......................................................................................................... 340
40.3.4 Configuring SNMP

.............................................................................................. 344

40.3.5 Configuring SNMP Trap Group

........................................................................... 346

40.3.6 Setting Up Login Accounts ................................................................................... 347
40.4 SSH Overview ................................................................................................................. 348
40.5 How SSH works ............................................................................................................... 349
40.6 SSH Implementation on the Switch ................................................................................. 350
40.6.1 Requirements for Using SSH ................................................................................. 350
40.7 Introduction to HTTPS ..................................................................................................... 350
40.8 HTTPS Example .............................................................................................................. 351
40.8.1 Internet Explorer Warning Messages ..................................................................... 351
40.8.2 Netscape Navigator Warning Messages ................................................................ 352
40.8.3 The Main Screen .................................................................................................... 354
40.9 Service Port Access Control
40.10 Remote Management

20

......................................................................................... 354

............................................................................................... 355

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Table of Contents

Chapter 41
Diagnostic.............................................................................................................................. 357
41.1 Diagnostic ....................................................................................................................... 357

Chapter 42
Syslog .................................................................................................................................... 359
42.1 Syslog Overview .............................................................................................................. 359
42.2 Syslog Setup .................................................................................................................. 360
42.3 Syslog Server Setup ....................................................................................................... 361

Chapter 43
Cluster Management............................................................................................................. 363
43.1 Clustering Management Status Overview ...................................................................... 363
43.2 Cluster Management Status ........................................................................................... 364
43.2.1 Cluster Member Switch Management ................................................................... 365
43.3 Clustering Management Configuration .......................................................................... 368

Chapter 44
MAC Table.............................................................................................................................. 371
44.1 MAC Table Overview ...................................................................................................... 371
44.2 Viewing the MAC Table .................................................................................................... 372

Chapter 45
IP Table .................................................................................................................................. 375
45.1 IP Table Overview ........................................................................................................... 375
45.2 Viewing the IP Table ........................................................................................................ 376

Chapter 46
ARP Table .............................................................................................................................. 379
46.1 ARP Table Overview ....................................................................................................... 379
46.1.1 How ARP Works .................................................................................................... 379
46.2 Viewing the ARP Table ................................................................................................... 380

Chapter 47
Routing Table ........................................................................................................................ 381
47.1 Overview .......................................................................................................................... 381
47.2 Viewing the Routing Table Status ................................................................................... 381

Chapter 48
Configure Clone .................................................................................................................... 383
48.1 Configure Clone .............................................................................................................. 383

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Table of Contents

Part VI: Troubleshooting & Product Specifications.......................... 385
Chapter 49
Troubleshooting.................................................................................................................... 387
49.1 Power, Hardware Connections, and LEDs ...................................................................... 387
49.2 Switch Access and Login ................................................................................................. 388
49.3 Switch Configuration ........................................................................................................ 391

Chapter 50
Product Specifications ......................................................................................................... 393

Part VII: Appendices and Index .......................................................... 403
Appendix A Common Services............................................................................................. 405
Appendix B Legal Information .............................................................................................. 409
Index....................................................................................................................................... 413

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P ART I
Introduction
Getting to Know Your Switch (25)
Hardware Installation and Connection
(31)
Hardware Overview (35)

23

24

CHAPTER

1

Getting to Know Your Switch
This chapter introduces the main features and applications of the Switch.

1.1 Introduction
Your Switch is a stand-alone, layer-3, Gigabit Ethernet (GbE) switch with two 12
Gigabit stacking ports as well as support for an optional 2-port 10 Gigabit uplink
module. By integrating router functions, the Switch performs wire-speed layer-3
routing in addition to layer-2 switching.
The Switch comes with 24 GbE dual personality interfaces. A dual personality
interface includes one Gigabit port and one slot for a mini-GBIC transceiver (SFP
module) with one port active at a time.
There are two XGS-4728F models. The XGS-4728F DC model requires DC power
supply input of -36 VDC to -72 VDC, 1.5 A Max no tolerance. The XGS-4728F AC
model requires 100 VAC to 240 VAC, 0.8 A power.
With its built-in web configurator, managing and configuring the Switch is easy. In
addition, the Switch can also be managed via Telnet, any terminal emulator
program on the console port, or third-party SNMP management.
See Chapter 50 on page 393 for a full list of software features available on the
Switch.

1.1.1 Bridging Example
In this example the Switch connects different company departments (RD and
Sales) to the corporate backbone. It can alleviate bandwidth contention and
eliminate server and network bottlenecks. All users that need high bandwidth can
connect to high-speed department servers via the Switch. You can provide a

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Chapter 1 Getting to Know Your Switch
super-fast uplink connection by using the optional 10 Gigabit uplink module on the
Switch.

Figure 1 Bridging Application

Backbone

Sales

RD

1.1.2 High Performance Switching Example
The Switch is ideal for connecting two geographically dispersed networks that
need high bandwidth. In the following example, a company uses the optional 10
Gigabit uplink modules to connect the headquarters to a branch office network.
Within the headquarters network, a company can use trunking to group several
physical ports into one logical higher-capacity link. Trunking can be used if for
example, it is cheaper to use multiple lower-speed links than to under-utilize a
high-speed, but more costly, single-port link.

Figure 2 High Performance Switching
10 Gbps

Trunk

Branch

HQ

26

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Chapter 1 Getting to Know Your Switch

1.1.3 Gigabit Ethernet to the Desktop
The Switch is an ideal solution for small networks which demand high bandwidth
for a group of heavy traffic users. You can connect computers and servers directly
to the Switch’s port or connect other switches to the Switch. Use the optional 10
Gigabit uplink module to provide high speed access to a data server and the
Internet. The uplink module supports a fiber-optic connection which alleviates the
distance limitations of copper cabling.
In this example, all computers can share high-speed applications on the server
and access the Internet. To expand the network, simply add more networking
devices such as switches, routers, computers, print servers and so on.

Figure 3 Gigabit to the Desktop

Internet

1.1.4 IEEE 802.1Q VLAN Application Example
A VLAN (Virtual Local Area Network) allows a physical network to be partitioned
into multiple logical networks. Stations on a logical network belong to one or more
groups. With VLAN, a station cannot directly talk to or hear from stations that are
not in the same group(s) unless such traffic first goes through a router.
For more information on VLANs, refer to Chapter 9 on page 95.

1.1.4.1 Tag-based VLAN Example
Ports in the same VLAN group share the same frame broadcast domain, thus
increasing network performance by reducing broadcast traffic. VLAN groups can
be modified at any time by adding, moving or changing ports without any recabling.

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Chapter 1 Getting to Know Your Switch
Shared resources such as a server can be used by all ports in the same VLAN as
the server. In the following figure only ports that need access to the server need
to be part of VLAN 1. Ports can belong to other VLAN groups too.

Figure 4 Shared Server Using VLAN Example

1.2 Ways to Manage the Switch
Use any of the following methods to manage the Switch.
• Web Configurator. This is recommended for everyday management of the Switch
using a (supported) web browser. See Chapter 4 on page 45.
• Command Line Interface. Line commands offer an alternative to the Web
Configurator and may be necessary to configure advanced features. See the CLI
Reference Guide.
• FTP. Use File Transfer Protocol for firmware upgrades and configuration backup/
restore. See Section 39.8 on page 333.
• SNMP. The device can be monitored and/or managed by an SNMP manager. See
Section 40.3 on page 338.

1.3 Good Habits for Managing the Switch
Do the following things regularly to make the Switch more secure and to manage
the Switch more effectively.
• Change the password. Use a password that’s not easy to guess and that consists
of different types of characters, such as numbers and letters.
• Write down the password and put it in a safe place.

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Chapter 1 Getting to Know Your Switch
• Back up the configuration (and make sure you know how to restore it).
Restoring an earlier working configuration may be useful if the device becomes
unstable or even crashes. If you forget your password, you will have to reset the
Switch to its factory default settings. If you backed up an earlier configuration
file, you would not have to totally re-configure the Switch. You could simply
restore your last configuration.

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Chapter 1 Getting to Know Your Switch

30

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CHAPTER

2

Hardware Installation and
Connection
This chapter shows you how to install and connect the Switch.

2.1 Freestanding Installation
1

Make sure the Switch is clean and dry.

2

Set the Switch on a smooth, level surface strong enough to support the weight of
the Switch and the connected cables. Make sure there is a power outlet nearby.

3

Make sure there is enough clearance around the Switch to allow air circulation and
the attachment of cables and the power cord.

4

Remove the adhesive backing from the rubber feet.

5

Attach the rubber feet to each corner on the bottom of the Switch. These rubber
feet help protect the Switch from shock or vibration and ensure space between
devices when stacking.

Figure 5 Attaching Rubber Feet

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Chapter 2 Hardware Installation and Connection

Note: Do NOT block the ventilation holes. Leave space between devices when
stacking.
Note: For proper ventilation, allow at least 4 inches (10 cm) of clearance at the front
and 3.4 inches (8 cm) at the back of the Switch. This is especially important for
enclosed rack installations.

2.2 Mounting the Switch on a Rack
This section lists the rack mounting requirements and precautions and describes
the installation steps.

2.2.1 Rack-mounted Installation Requirements
• Two mounting brackets.
• Eight M3 flat head screws and a #2 Philips screwdriver.
• Four M5 flat head screws and a #2 Philips screwdriver.

Failure to use the proper screws may damage the unit.

2.2.1.1 Precautions
• Make sure the rack will safely support the combined weight of all the equipment
it contains.
• Make sure the position of the Switch does not make the rack unstable or topheavy. Take all necessary precautions to anchor the rack securely before
installing the unit.

2.2.2 Attaching the Mounting Brackets to the Switch
1

Position a mounting bracket on one side of the Switch, lining up the four screw
holes on the bracket with the screw holes on the side of the Switch.

Figure 6 Attaching the Mounting Brackets

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Chapter 2 Hardware Installation and Connection

2

Using a #2 Philips screwdriver, install the M3 flat head screws through the
mounting bracket holes into the Switch.

3

Repeat steps 1 and 2 to install the second mounting bracket on the other side of
the Switch.

4

You may now mount the Switch on a rack. Proceed to the next section.

2.2.3 Mounting the Switch on a Rack
1

Position a mounting bracket (that is already attached to the Switch) on one side of
the rack, lining up the two screw holes on the bracket with the screw holes on the
side of the rack.

Figure 7 Mounting the Switch on a Rack

2

Using a #2 Philips screwdriver, install the M5 flat head screws through the
mounting bracket holes into the rack.

3

Repeat steps 1 and 2 to attach the second mounting bracket on the other side of
the rack.

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Chapter 2 Hardware Installation and Connection

34

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CHAPTER

3

Hardware Overview
This chapter describes the front panel and rear panel of the Switch and shows you
how to make the hardware connections.

3.1 Front Panel Connections
The figure below shows the front panel of the Switch.

Figure 8 Front Panel

The following table describes the ports.

Table 1 Panel Connections
CONNECTO
R
24 Dual
Personality
Interfaces

DESCRIPTION
Each interface has one 1000Base-T copper RJ-45 port and one mini-GBIC
(Gigabit Interface Converter) fiber port, with one port active at a time.
•

24 1000Base-T Ports:
Connect these ports to high-bandwidth backbone network Ethernet
switches using Category 5/5e/6 1000Base-T Ethernet cables.
Use an 8-wire Ethernet cable for Gigabit connections. Using a 4-wire
Ethernet cable limits your connection to 100 Mbps. Note that the
connection speed also depends on what the Ethernet device at the
other end can support.

•

24 Mini-GBIC Ports:
Use Small Form-Factor Pluggable (SFP) transceivers in these ports for
1000Base-X fiber-optic connections to backbone Ethernet switches.

3.1.1 Dual Personality Interfaces
There are 24 Dual Personality interfaces, comprising 24 1000Base-T/mini-GBIC
combo ports. For each interface you can connect either to the 1000Base-T port or
the mini-GBIC port. The mini-GBIC ports have priority over the 1000Base-T ports.

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Chapter 3 Hardware Overview
This means that if a mini-GBIC port and the corresponding 1000Base-T port are
connected at the same time, the 1000Base-T port will be disabled.

3.1.2 1000Base-T Ports
The Switch has 24 1000Base-T auto-negotiating, auto-crossover Ethernet ports.
In 100/1000 Mbps Gigabit Ethernet, the speed can be 100 Mbps or 1000 Mbps.
The duplex mode can be both half or full duplex at 100 Mbps and full duplex only
at 1000 Mbps.
An auto-negotiating port can detect and adjust to the optimum Ethernet speed
(100/1000 Mbps) and duplex mode (full duplex or half duplex) of the connected
device.
An auto-crossover (auto-MDI/MDI-X) port automatically works with a straightthrough or crossover Ethernet cable.

3.1.2.1 Default Ethernet Settings
The factory default negotiation settings for the Ethernet ports on the Switch are:
• Speed: Auto
• Duplex: Auto
• Flow control: Off

3.1.3 Mini-GBIC Slots
These are 24 slots for Small Form-Factor Pluggable (SFP) transceivers. A
transceiver is a single unit that houses a transmitter and a receiver. Use a
transceiver to connect a fiber-optic cable to the Switch. The Switch does not come
with transceivers. You must use transceivers that comply with the Small FormFactor Pluggable (SFP) Transceiver MultiSource Agreement (MSA). See the SFF
committee’s INF-8074i specification Rev 1.0 for details.
You can change transceivers while the Switch is operating. You can use different
transceivers to connect to Ethernet switches with different types of fiber-optic
connectors.
• Type: SFP connection interface
• Connection speed: 1 Gigabit per second (Gbps)

To avoid possible eye injury, do not look into an operating fiberoptic module’s connectors.

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Chapter 3 Hardware Overview

3.1.3.1 Transceiver Installation
Use the following steps to install a mini GBIC transceiver (SFP or XFP module).
1

Insert the transceiver into the slot with the exposed section of PCB board facing
down.

Figure 9 Transceiver Installation Example

2

Press the transceiver firmly until it clicks into place.

3

The Switch automatically detects the installed transceiver. Check the LEDs to
verify that it is functioning properly.

Figure 10 Installed Transceiver

3.1.3.2 Transceiver Removal
Use the following steps to remove a mini GBIC transceiver (SFP module).
1

Open the transceiver’s latch (latch styles vary).

Figure 11 Opening the Transceiver’s Latch Example

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Chapter 3 Hardware Overview

2

Pull the transceiver out of the slot.

Figure 12 Transceiver Removal Example

3.2 Rear Panel
The following figures show the rear panels of the AC and DC power input model
switches. The rear panels contain:
• A connector for the backup power supply (A)
• An optional slot (B) for installing an EM-422 or EM-412 uplink module
• Two stacking ports (C)
• An RJ-45 out-of-band management port (D)
• An RS-232 management console port (E)
• A connector for the power receptacle (F)
• A power switch (G) (DC power input model only).

Figure 13 Rear Panel - AC Model

A

B

C

D

E

F

Figure 14 Rear Panel - DC Model

G

38

F

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Chapter 3 Hardware Overview
The following figure shows the front panel of the EM-422 and EM-412 modules.

Figure 15 The Front Panel of the EM-422 and EM-412 Modules

EM-422

EM-412

The following table describes the ports on the rear panel.

Table 2 Panel Connections
CONNECTO
R
Optional two
XFP or CX4
Ports

DESCRIPTION
These ports are available when you install an EM-422 or ES-412 in the
optional uplink module (B in the figure above). Both the EM-422 and ES412 are used to connect your switch to other high-speed Ethernet
switches for stacking in you network.
•

•

For EM-422 connection: Use 10 Gigabit Small Form Factor Pluggable
(XFP) transceivers to connect 1000Base-X fiber-optic cables to these
ports. See Section 3.1.3.1 on page 37 and Section 3.1.3.2 on page 37
for information on installing and removing transceivers.
For EM-412 connection: Use 10GBase-CX4 cables to connect to these
ports.

See the EM-422 and EM-412 User’s Guides for more information.
Two stacking
ports

Connect these ports to other XGS-4728F switches for stacking using
stacking cables.

Management
Port

Connect to a computer using an RJ-45 Ethernet cable for local
configuration of the Switch.

Console Port

Only connect this port to your computer (using an RS-232 cable) if you
want to configure the Switch using the command line interface (CLI) via
the console port.

3.2.1 Power Connector
Make sure you are using the correct power source as shown on the panel and that
no objects obstruct the airflow of the fans.
Use the following procedures to connect the Switch to a power source after you
have installed it.

Note: Check the power supply requirements in Chapter 50 on page 393, and make
sure you are using an appropriate power source.

Keep the power supply switch and the Switch’s power switch in
the OFF position until you come to the procedure for turning on
the power.

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Chapter 3 Hardware Overview
Use only power wires of the required diameter for connecting the Switch to a
power supply.

3.2.1.1 AC Power Connection
Note: This is only for the AC model of the Switch.
Connect the female end of the power cord to the power socket of your Switch.
Connect the other end of the cord to a power outlet.

3.2.1.2 DC Power Connection
Note: This is only for the DC model of the Switch.
The Switch uses a single ETB series terminal block plug with four pins which allows
you to connect up to two separate power supplies. If one power supply fails the
system can operate on the remaining power supply. Use two wires to connect to a
single terminal pair, one wire for the positive terminal and one wire for the
negative terminal.

Note: The current rating of the power wires must be greater than 20 Amps. The power
supply to which the Switch connects must have a built-in circuit breaker or
switch to toggle the power.
Note: When installing the power wire, push it wire firmly into the terminal as deep as
possible and make sure that no exposed (bare) wire can be seen or touched.

Exposed power wire is dangerous. Use extreme care when
connecting a DC power source to the device.
To connect a power supply:

40

1

Use a screwdriver to loosen the terminal block captive screws.

2

Connect one end of a power wire to the Switch’s RTN (return) pin and tighten the
captive screw.

3

Connect the other end of the power wire to the positive terminal on the power
supply.

4

Connect one end of a power wire to the Switch’s -48V (input) pin and tighten the
captive screw.

5

Connect the other end of the power wire to the negative terminal on the power
supply.

6

Insert the terminal block plug in the Switch’s terminal block header.

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Chapter 3 Hardware Overview

3.2.2 External Backup Power Supply Connector
The Switch supports external backup power supply (BPS).
The Switch constantly monitors the status of the internal power supply. The
backup power supply automatically provides power to the Switch in the event of a
power failure. Once the Switch receives power from the backup power supply, it
will not automatically switch back to using the internal power supply even when
the power is resumed.

3.2.3 Console Port
For local management, you can use a computer with terminal emulation software
configured to the following parameters:
• VT100 terminal emulation
• 9600 bps
• No parity, 8 data bits, 1 stop bit
• No flow control
Connect the male 9-pin end of the RS-232 console cable to the console port of the
Switch. Connect the female end to a serial port (COM1, COM2 or other COM port)
of your computer.

3.3 LEDs
The following table describes the LEDs.

Table 3 LEDs
LED

COLO
R

STATUS

DESCRIPTION

BPS

Green

Blinking

The system is receiving power from the backup power
supply.

PWR

Green

SYS

Green

XGS-4728F User’s Guide

On

The backup power supply is connected and active.

Off

The backup power supply is not ready or not active.

On

The system is turned on.

Off

The system is off.

Blinking

The system is rebooting and performing self-diagnostic
tests.

On

The system is on and functioning properly.

Off

The power is off or the system is not ready/
malfunctioning.

41

Chapter 3 Hardware Overview

Table 3 LEDs (continued)
LED

COLO
R

STATUS

DESCRIPTION

ALM

Red

On

There is a hardware failure.

Off

The system is functioning normally.

On

The Switch is connected to other switches in the stack on
Stacking Port 1.

Off

The Switch is not connected to other switches in the
stack on Stacking Port 1.

On

The Switch is connected to other switches in the stack on
Stacking Port 2.

Off

The Switch is not connected to other switches in the
stack on Stacking Port 2.

Displays
hourglas
s icon

The Switch is starting up.

Displays
Stack ID
number

The LED is showing the Stack ID number of the Switch.

S1

S2

Green

Green

System Status

1000Base-T Gigabit Ports (
1-24

Green

Amber

Blinking

The system is transmitting/receiving to/from a 10/1000
Mbps Ethernet network.

On

The link to a 10/1000 Mbps Ethernet network is up.

Blinking

The system is transmitting/receiving to/from a 100 Mbps
Ethernet network.

On

The link to a 100 Mbps Ethernet network is up.

Off

The link to an Ethernet network is down.

1000Base-X Mini-GBIC Slots (
1-24

42

Green

)

)

On

The port has a successful connection.

Blinking

The port is receiving or transmitting data.

Off

This link is disconnected.

XGS-4728F User’s Guide

P ART II
Basic Configuration
The Web Configurator (45)
Initial Setup Example (55)
System Status and Port Statistics (71)
Basic Setting (77)

43

44

CHAPTER

4

The Web Configurator
This section introduces the configuration and functions of the web configurator.

4.1 Introduction
The web configurator is an HTML-based management interface that allows easy
Switch setup and management via Internet browser. Use Internet Explorer 6.0
and later or Firefox 2.0 and later versions. The recommended screen resolution is
1024 by 768 pixels.
In order to use the web configurator you need to allow:
• Web browser pop-up windows from your device. Web pop-up blocking is enabled
by default in Windows XP SP (Service Pack) 2.
• JavaScript (enabled by default).
• Java permissions (enabled by default).

4.2 System Login
1

Start your web browser.

2

Type “http://” and the IP address of the Switch (for example, the default
management IP address is 192.168.1.1 through an in-band (non-MGMT) port and
192.168.0.1 through the MGMT port) in the Location or Address field. Press
[ENTER].

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Chapter 4 The Web Configurator

3

The login screen appears. The default username is admin and associated default
password is 1234. The date and time display as shown if you have not configured
a time server nor manually entered a time and date in the General Setup screen.

Figure 16 Web Configurator: Login

4

Click OK to view the first web configurator screen.

4.3 The Status Screen
The Status screen is the first screen that displays when you access the web
configurator.

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Chapter 4 The Web Configurator
The following figure shows the navigating components of a web configurator
screen.

Figure 17 Web Configurator Home Screen (Status)

B C DE
A

A - Click the menu items to open submenu links, and then click on a submenu link
to open the screen in the main window.
B, C, D, E - These are quick links which allow you to perform certain tasks no
matter which screen you are currently working in.
B - Click this link to save your configuration into the Switch’s nonvolatile memory.
Nonvolatile memory is saved in the configuration file from which the Switch
booted from and it stays the same even if the Switch’s power is turned off. See
Section 39.3 on page 330 for information on saving your settings to a specific
configuration file.
C - Click this link to go to the status page of the Switch.
D - Click this link to log out of the web configurator.
E - Click this link to display web help pages. The help pages provide descriptions
for all of the configuration screens.

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Chapter 4 The Web Configurator
In the navigation panel, click a main link to reveal a list of submenu links.

Table 4 Navigation Panel Sub-links Overview
BASIC SETTING

ADVANCED
APPLICATION

IP APPLICATION

MANAGEMENT

The following table describes the links in the navigation panel.

Table 5 Navigation Panel Links
LINK

DESCRIPTION

Basic Settings
System Info

This link takes you to a screen that displays general system and
hardware monitoring information.

General Setup

This link takes you to a screen where you can configure general
identification information and time settings for the Switch.

Switch Setup

This link takes you to a screen where you can set up global Switch
parameters such as VLAN type, MAC address learning, IGMP snooping,
GARP and priority queues.

IP Setup

This link takes you to a screen where you can configure the IP address,
subnet mask (necessary for Switch management) and DNS (domain
name server) and set up to 64 IP routing domains.

Port Setup

This link takes you to screens where you can configure speed, flow
control and priority settings for individual Switch ports.

Advanced Application

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Chapter 4 The Web Configurator

Table 5 Navigation Panel Links (continued)
LINK

DESCRIPTION

VLAN

This link takes you to screens where you can configure port-based or
802.1Q VLAN (depending on what you configured in the Switch Setup
menu). You can also configure a protocol based VLAN or a subnet based
VLAN in these screens.

Static MAC
Forwarding

This link takes you to screens where you can configure static MAC
addresses for a port. These static MAC addresses do not age out.

Static
Multicast
Forwarding

This link takes you to a screen where you can configure static multicast
MAC addresses for port(s). These static multicast MAC addresses do not
age out.

Filtering

This link takes you to a screen to set up filtering rules.

Spanning Tree
Protocol

This link takes you to screens where you can configure the RSTP/MRSTP/
MSTP to prevent network loops.

Bandwidth
Control

This link takes you to screens where you can cap the maximum
bandwidth allowed from specified source(s) to specified destination(s).

Broadcast
Storm Control

This link takes you to a screen to set up broadcast filters.

Mirroring

This link takes you to screens where you can copy traffic from one port
or ports to another port in order that you can examine the traffic from
the first port without interference.

Link
Aggregation

This link takes you to screen where you can logically aggregate physical
links to form one logical, higher-bandwidth link.

Port
Authentication

This link takes you to a screen where you can configure IEEE 802.1x port
authentication as well as MAC authentication for clients communicating
via the Switch.

Port Security

This link takes you to a screen where you can activate MAC address
learning and set the maximum number of MAC addresses to learn on a
port.

Classifier

This link takes you to a screen where you can configure the Switch to
group packets based on the specified criteria.

Policy Rule

This link takes you to a screen where you can configure the Switch to
perform special treatment on the grouped packets.

Queuing
Method

This link takes you to a screen where you can configure queuing with
associated queue weights for each port.

VLAN Stacking

This link takes you to a screen where you can activate and configure
VLAN stacking.

Multicast

This link takes you to screen where you can configure various multicast
features, IGMP snooping and create multicast VLANs.

AAA

This link takes you to a screen where you can configure authentication,
authorization and accounting services via external servers. The external
servers can be either RADIUS (Remote Authentication Dial-In User
Service) or TACACS+ (Terminal Access Controller Access-Control System
Plus).

IP Source
Guard

This link takes you to screens where you can configure filtering of
unauthorized DHCP and ARP packets in your network.

Loop Guard

This link takes you to a screen where you can configure protection
against network loops that occur on the edge of your network.

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Table 5 Navigation Panel Links (continued)
LINK

DESCRIPTION

VLAN Mapping

This link takes you to screens where you can configure VLAN mapping
settings on the Switch.

Layer 2
Protocol
Tunneling

This link takes you to a screen where you can configure L2PT (Layer 2
Protocol Tunneling) settings on the Switch.

Private VLAN

This link takes you to a screen where you can block traffic between ports
in a VLAN on the Switch.

IP Application
Static Route

This link takes you to a screen where you can configure static routes. A
static route defines how the Switch should forward traffic by configuring
the TCP/IP parameters manually.

RIP

This link takes you to a screen where you can configure the RIP (Routing
Information Protocol) direction and versions.

OSPF

This link takes you to screens where you can view the OSPF status and
configure OSPF settings.

IGMP

This link takes you to a screen where you can configure the IGMP
settings.

DVMRP

This link takes you to a screen where you can configure the DVMRP
(Distance Vector Multicast Routing Protocol) settings.

DiffServ

This link takes you to screens where you can enable DiffServ, configure
marking rules and set DSCP-to-IEEE802.1p mappings.

DHCP

This link takes you to screens where you can configure the DHCP
settings.

VRRP

This link takes you to screens where you can configure redundant virtual
router for your network.

Management

50

Maintenance

This link takes you to screens where you can perform firmware and
configuration file maintenance as well as reboot the system.

Access Control

This link takes you to screens where you can change the system login
password and configure SNMP and remote management.

Diagnostic

This link takes you to screens where you can view system logs and can
test port(s).

Syslog

This link takes you to screens where you can setup system logs and a
system log server.

Cluster
Management

This link takes you to a screen where you can configure clustering
management and view its status.

MAC Table

This link takes you to a screen where you can view the MAC address and
VLAN ID of a device attach to a port. You can also view what kind of
device it is.

IP Table

This link takes you to a screen where you can view the IP addresses and
VLAN ID of a device attached to a port.You can also view what kind of
device it is.

ARP Table

This link takes you to a screen where you can view the MAC address – IP
address resolution table.

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Table 5 Navigation Panel Links (continued)
LINK

DESCRIPTION

Routing Table

This link takes you to a screen where you can view the routing table.

Configure
Clone

This link takes you to a screen where you can copy attributes of one port
to (an)other port(s).

4.3.1 Change Your Password
After you log in for the first time, it is recommended you change the default
administrator password. Click Management > Access Control > Logins to
display the next screen.

Figure 18 Change Administrator Login Password

4.4 Saving Your Configuration
When you are done modifying the settings in a screen, click Apply to save your
changes back to the run-time memory. Settings in the run-time memory are lost
when the Switch’s power is turned off.
Click the Save link in the upper right hand corner of the web configurator to save
your configuration to nonvolatile memory. Nonvolatile memory refers to the
Switch’s storage that remains even if the Switch’s power is turned off.

Note: Use the Save link when you are done with a configuration session.

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4.5 Switch Lockout
You could block yourself (and all others) from using in-band-management
(managing through the data ports) if you do one of the following:
1

Delete the management VLAN (default is VLAN 1).

2

Delete all port-based VLANs with the CPU port as a member. The “CPU port” is the
management port of the Switch.

3

Filter all traffic to the CPU port.

4

Disable all ports.

5

Misconfigure the text configuration file.

6

Forget the password and/or IP address.

7

Prevent all services from accessing the Switch.

8

Change a service port number but forget it.

Note: Be careful not to lock yourself and others out of the Switch. If you do lock
yourself out, try using out-of-band management (via the management port) to
configure the Switch.

4.6 Resetting the Switch
If you lock yourself (and others) from the Switch or forget the administrator
password, you will need to reload the factory-default configuration file or reset the
Switch back to the factory defaults.

4.6.1 Reload the Configuration File
Uploading the factory-default configuration file replaces the current configuration
file with the factory-default configuration file. This means that you will lose all
previous configurations and the speed of the console port will be reset to the
default of 9600bps with 8 data bit, no parity, one stop bit and flow control set to
none. The password will also be reset to “1234” and the IP address to
192.168.1.1.
To upload the configuration file, do the following:

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1

Connect to the console port using a computer with terminal emulation software.
See Section 3.2 on page 38 for details.

2

Disconnect and reconnect the Switch’s power to begin a session. When you
reconnect the Switch’s power, you will see the initial screen.

3

When you see the message “Press any key to enter Debug Mode within 3
seconds ...” press any key to enter debug mode.

4

Type atlc after the “Enter Debug Mode” message.

5

Wait for the “Starting XMODEM upload” message before activating XMODEM
upload on your terminal.

6

After a configuration file upload, type atgo to restart the Switch.

Figure 19 Resetting the Switch: Via the Console Port
ZyNOS Version: V3.90(BBC.0)b1 | 04/28/2009 09:20:42
Bootbase Version: V1.00 | 10/22/2007 12:48:50
RAM:Size = 128 Mbytes
DRAM POST: Testing:131072K OK
DRAM Test SUCCESS !
FLASH: Intel 64M
ZyNOS Version: V3.90(BBC.0)b1 | 04/28/2009 09:20:42
Press any key to enter debug mode within 3 seconds.
.....................................
Enter Debug Mode
ras> atlc
Starting XMODEM upload (CRC mode)....
CCCCCCCCCCCCCCCC
Total 393216 bytes received.
Erasing..
................................................................
OK
ras> atgo

The Switch is now reinitialized with a default configuration file including the default
password of “1234”.

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4.7 Logging Out of the Web Configurator
Click Logout in a screen to exit the web configurator. You have to log in with your
password again after you log out. This is recommended after you finish a
management session for security reasons.

Figure 20 Web Configurator: Logout Screen

4.8 Help
The web configurator’s online help has descriptions of individual screens and some
supplementary information.
Click the Help link from a web configurator screen to view an online help
description of that screen.

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5

Initial Setup Example
This chapter shows how to set up the Switch for an example network.

5.1 Overview
The following lists the configuration steps for the example network:
• Configure an IP interface
• Configure DHCP server settings
• Create a VLAN
• Set port VLAN ID
• Enable RIP

5.1.1 Configuring an IP Interface
On a layer-3 switch, an IP interface (also known as an IP routing domain) is not
bound to a physical port. The default IP address of the Switch is 192.168.1.1 with
a subnet mask of 255.255.255.0.
In the example network, since the RD network is already in the same IP interface
as the Switch, you don’t need to create an IP interface for it. However, if you want
to have the Sales network on a different routing domain, you need to create a

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new IP interface. This allows the Switch to route traffic between the RD and Sales
networks.

Figure 21 Initial Setup Network Example: IP Interface

1

Connect your computer to the MGMT port that is used only for management.
Make sure your computer is in the same subnet as the MGMT port.

2

Open your web browser and enter 192.168.0.1 (the default MGMT port IP
address) in the address bar to access the web configurator. See Section 4.2 on
page 45 for more information.

3

Click Basic Setting and IP Setup
in the navigation panel.

4

Configure the related fields in the
IP Setup screen.

EXAMPLE

For the Sales network, enter 192.168.2.1 as the IP address and 255.255.255.0 as
the subnet mask.

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5

In the VID field, enter the ID of the VLAN group to which you want this IP
interface to belong. This is the same as the VLAN ID you configure in the Static
VLAN screen.

6

Click Add to save the settings to the run-time memory. Settings in the run-time
memory are lost when the Switch’s power is turned off.

5.1.2 Configuring DHCP Server Settings
You can set the Switch to assign network information (such as the IP address,
DNS server, etc.) to DHCP clients on the network.
For the example network, configure two DHCP client pools on the Switch for the
DHCP clients in the RD and Sales networks.
1

In the web configurator, click IP
Application and DHCP in the
navigation panel and click the
VLAN link.

2

In the VLAN Setting screen,
specify the ID of the VLAN to
which the DHCP clients belong,
the starting IP address pool,
subnet mask, default gateway
address and the DNS server
address(es).

3

Click Add to save the settings to
the run-time memory. Settings in
the run-time memory are lost when the Switch’s power is turned off.

EXAMPLE

5.1.3 Creating a VLAN
VLANs confine broadcast frames to the VLAN group in which the port(s) belongs.
You can do this with port-based VLAN or tagged static VLAN with fixed port
members.

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In this example, you want to configure port 1 as a member of VLAN 2.

Figure 22 Initial Setup Network Example: VLAN

1

Click Advanced Application > VLAN in the navigation panel and click the Static
VLAN link.

2

In the Static VLAN screen, select
ACTIVE, enter a descriptive name
in the Name field and enter 2 in
the VLAN Group ID field for the
VLAN2 network.

EXAMPLE
Note: The VLAN Group ID field in this screen and the VID field in the IP Setup
screen refer to the same VLAN ID.

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3

Since the VLAN2 network is connected to port 1 on the Switch, select Fixed to
configure port 1 to be a permanent member of the VLAN only.

4

To ensure that VLAN-unaware devices (such as computers and hubs) can receive
frames properly, clear the TX Tagging check box to set the Switch to remove
VLAN tags before sending.

5

Click Add to save the settings to the run-time memory. Settings in the run-time
memory are lost when the Switch’s power is turned off.

5.1.4 Setting Port VID
Use PVID to add a tag to incoming untagged frames received on that port so that
the frames are forwarded to the VLAN group that the tag defines.
In the example network, configure 2 as the port VID on port 1 so that any
untagged frames received on that port get sent to VLAN 2.

Figure 23 Initial Setup Network Example: Port VID

1

Click Advanced Applications
and VLAN in the navigation
panel. Then click the VLAN Port
Setting link.

2

Enter 2 in the PVID field for port
1 and click Apply to save your
changes back to the run-time
memory. Settings in the run-time
memory are lost when the
Switch’s power is turned off.

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5.1.5 Enabling RIP
To exchange routing information with other routing devices across different
routing domains, enable RIP (Routing Information Protocol) in the RIP screen.
1

Click IP Application and RIP in the navigation panel.

2

Select Both in the Direction
field to set the Switch to
broadcast and receive routing
information.

3

In the Version field, select
RIP-1 for the RIP packet
format that is universally
supported.

4

60

EXAMPLE

Click Apply to save your changes back to the run-time memory. Settings in the
run-time memory are lost when the Switch’s power is turned off.

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6
Tutorials

This chapter provides some examples of using the web configurator to set up and
use the Switch. The tutorials include:
• How to Use DHCP Snooping on the Switch
• How to Use DHCP Relay on the Switch

6.1 How to Use DHCP Snooping on the Switch
You only want DHCP server A connected to port 5 to assign IP addresses to all
devices in VLAN network (V). Create a VLAN containing ports 5, 6 and 7. Connect
a computer M to the Switch’s MGMT port.

Figure 24 Tutorial: DHCP Snooping Tutorial Overview

M

V
C

B

A

Note: For related information about DHCP snooping, see Section 26.1 on page 231.
The settings in this tutorial are as the following.

Table 6 Tutorial: Settings in this Tutorial
HOST

PORT
VLAN
CONNECTED

PVID

DHCP SNOOPING
PORT TRUSTED

DHCP Server (A)

5

1 and 100

100

Yes

DHCP Client (B)

6

1 and 100

100

No

DHCP Client (C)

7

1 and 100

100

No

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1

Access the Switch from the MGMT port through http://192.168.0.1 by default.
Log into the Switch by entering the username (default: admin) and password
(default: 1234).

2

Go to Advanced Application > VLAN > Static VLAN, and create a VLAN with ID
of 100. Add ports 5, 6 and 7 in the VLAN by selecting Fixed in the Control field as
shown.
Deselect Tx Tagging because you don’t want outgoing traffic to contain this VLAN
tag.
Click Add.

Figure 25 Tutorial: Create a VLAN and Add Ports to It

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3

Go to Advanced Application > VLAN > VLAN Port Setting, and set the PVID
of the ports 5, 6 and 7 to 100. This tags untagged incoming frames on ports 5, 6
and 7 with the tag 100.

Figure 26 Tutorial: Tag Untagged Frames

4

Go to Advanced Application > IP Source Guard > DHCP snooping >
Configure, activate and specify VLAN 100 as the DHCP VLAN as shown. Click
Apply.

Figure 27

5

Tutorial: Specify DHCP VLAN

Click the Port link at the top right corner.

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6

The DHCP Snooping Port Configure screen appears. Select Trusted in the
Server Trusted state field for port 5 because the DHCP server is connected to
port 5. Keep ports 6 and 7 Untrusted because they are connected to DHCP
clients. Click Apply.

Figure 28

7

Tutorial: Set the DHCP Server Port to Trusted

Go to Advanced Application > IP Source Guard > DHCP snooping >
Configure > VLAN, show VLAN 100 by entering 100 in the Start VID and End
VID fields and click Apply. Then select Yes in the Enabled field of the VLAN 100
entry shown at the bottom section of the screen.
If you want to add more information in the DHCP request packets such as source
VLAN ID or system name, you can also select the Option82 and Information
fields in the entry. See Section 26.1.1.3 on page 233.

Figure 29 Tutorial: Enable DHCP Snooping on this VLAN

8

64

Click Save at the top right corner of the web
configurator to save the configuration permanently.

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9

Connect your DHCP server to port 5 and a computer (as DHCP client) to either
port 6 or 7. The computer should be able to get an IP address from the DHCP
server. If you put the DHCP server on port 6 or 7, the computer will not able to get
an IP address.

10 To check if DHCP snooping works, go to Advanced Application > IP Source
Guard, you should see an IP assignment with the type dhcp-snooping as shown.

Figure 30 Tutorial: Check the Binding If DHCP Snooping Works

You can also telnet or log into the Switch’s console. Use the command “show dhcp
snooping binding” to see the DHCP snooping binding table as shown next.
sysname# show dhcp snooping binding
MacAddress
IpAddress
----------------- --------------00:02:00:00:00:1c
10.10.1.16
Total number of bindings: 1

Lease
-----------6d23h59m20s

Type
------------dhcp-snooping

VLAN
---100

Port
----7

6.2 How to Use DHCP Relay on the Switch
This tutorial describes how to configure your Switch to forward DHCP client
requests to a specific DHCP server. The DHCP server can then assign a specific IP
address based on the information in the DHCP requests.

6.2.1 DHCP Relay Tutorial Introduction
In this example, you have configured your DHCP server (192.168.2.3) and want to
have it assign a specific IP address (say 172.16.1.18) and gateway information to

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Chapter 6 Tutorials
DHCP client A based on the system name, VLAN ID and port number in the DHCP
request. Client A connects to the Switch’s port 2 in VLAN 102.

Figure 31 Tutorial: DHCP Relay Scenario

DHCP Server
192.168.2.3

Port 2
PVID=102

A

VLAN 102

172.16.1.18

6.2.2 Creating a VLAN
Follow the steps below to configure port 2 as a member of VLAN 102.
1

Access the web configurator through the Switch’s management port.

2

Go to Basic Setting > Switch Setup and set the VLAN type to 802.1Q. Click
Apply to save the settings to the run-time memory.

Figure 32 Tutorial: Set VLAN Type to 802.1Q

3

66

Click Advanced Application > VLAN > Static VLAN.

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4

In the Static VLAN screen, select ACTIVE, enter a descriptive name (VALN 102
for example) in the Name field and enter 102 in the VLAN Group ID field.

5

Select Fixed to configure port 2 to be a permanent member of this VLAN.

6

Clear the TX Tagging check box to set the Switch to remove VLAN tags before
sending.

7

Click Add to save the settings to the run-time memory. Settings in the run-time
memory are lost when the Switch’s power is turned off.

Figure 33 Tutorial: Create a Static VLAN

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8

Click the VLAN Status link in the Static VLAN screen and then the VLAN Port
Setting link in the VLAN Status screen.

Figure 34 Tutorial: Click the VLAN Port Setting Link

9

Enter 102 in the PVID field for port 2 to add a tag to incoming untagged frames
received on that port so that the frames are forwarded to the VLAN group that the
tag defines.

10 Click Apply to save your changes back to the run-time memory.

Figure 35 Tutorial: Add Tag for Frames Received on Port 2

11 Click the Save link in the upper right corner of the web configurator to save your
configuration permanently.

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6.2.3 Configuring DHCP Relay
Follow the steps below to enable DHCP relay on the Switch and allow the Switch to
add relay agent information (such as the VLAN ID) to DHCP requests.
1

Click IP Application > DHCP and then the Global link to open the DHCP Relay
screen.

2

Select the Active check box.

3

Enter the DHCP server’s IP address (192.168.2.3 in this example) in the Remote
DHCP Server 1 field.

4

Select the Option 82 and the Information check boxes.

5

Click Apply to save your changes back to the run-time memory.

Figure 36 Tutorial: Set DHCP Server and Relay Information

6

Click the Save link in the upper right corner of the web configurator to save your
configuration permanently.

7

The DHCP server can then assign a specific IP address based on the DHCP
request.

6.2.4 Troubleshooting
Check the client A’s IP address. If it did not receive the IP address 172.16.1.18,
make sure:
1

Client A is connected to the Switch’s port 2 in VLAN 102.

2

You configured the correct VLAN ID, port number and system name for DHCP relay
on both the DHCP server and the Switch.

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3

70

You clicked the Save link on the Switch to have your settings take effect.

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CHAPTER

7

System Status and Port
Statistics
This chapter describes the system status (web configurator home page) and port
details screens.

7.1 Overview
The home screen of the web configurator displays a port statistical summary with
links to each port showing statistical details.

7.2 Port Status Summary
To view the port statistics, click Status in all web configurator screens to display
the Status screen as shown next.

Figure 37 Status

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The following table describes the labels in this screen.

Table 7 Status
LABEL

DESCRIPTION

Port

This identifies the Ethernet port. Click a port number to display the Port
Details screen (refer to Figure 38 on page 73).

Name

This is the name you assigned to this port in the Basic Setting > Port
Setup screen.

Link

This field displays the speed (either 10M for 10 Mbps, 100M for 100
Mbps, 1000M for 1000 Mbps, and 10G for 10 Gbps) and the duplex (F
for full duplex or H for half). It also shows the cable type (Copper or
Fiber) for the combo ports.

State

If STP (Spanning Tree Protocol) is enabled, this field displays the STP
state of the port. (See Section 13.1.3 on page 127 for more information).
If STP is disabled, this field displays FORWARDING if the link is up,
otherwise, it displays STOP.

72

LACP

This fields displays whether LACP (Link Aggregation Control Protocol) has
been enabled on the port.

TxPkts

This field shows the number of transmitted frames on this port.

RxPkts

This field shows the number of received frames on this port.

Errors

This field shows the number of received errors on this port.

Tx KB/s

This field shows the transmission speed of data sent on this port in
kilobytes per second.

Rx KB/s

This field shows the transmission speed of data received on this port in
kilobytes per second.

Up Time

This field shows the total amount of time in hours, minutes and seconds
the port has been up.

Clear Counter

Type a port number, select Port and then click Clear Counter to erase
the recorded statistical information for that port, or select Any to clear
statistics for all ports.

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7.2.1 Status: Port Details
Click a number in the Port column in the Status screen to display individual port
statistics. Use this screen to check status and detailed performance data about an
individual port on the Switch.

Figure 38 Status: Port Details

The following table describes the labels in this screen.

Table 8 Status > Port Details
LABEL

DESCRIPTION

Port Info
Port NO.

This field displays the port number you are viewing.

Name

This field displays the name of the port.

Link

This field displays the speed (either 10M for 10Mbps, 100M for
100Mbpsl, 1000M for 1000 Mbps, and 10G for 10 Gbps) and the duplex
(F for full duplex or H for half duplex). It also shows the cable type
(Copper or Fiber).

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Table 8 Status > Port Details (continued)
LABEL
Status

DESCRIPTION
If STP (Spanning Tree Protocol) is enabled, this field displays the STP
state of the port (see Section 13.1.3 on page 127 for more information).
If STP is disabled, this field displays FORWARDING if the link is up,
otherwise, it displays STOP.

LACP

This field shows if LACP is enabled on this port or not.

TxPkts

This field shows the number of transmitted frames on this port

RxPkts

This field shows the number of received frames on this port

Errors

This field shows the number of received errors on this port.

Tx KB/s

This field shows the transmission speed of data sent on this port in
kilobytes per second.

Rx KB/s

This field shows the transmission speed of data received on this port in
kilobytes per second.

Up Time

This field shows the total amount of time the connection has been up.

Tx Packet
The following fields display detailed information about packets transmitted.
TX Packets

This field shows the number of good packets (unicast, multicast and
broadcast) transmitted.

Multicast

This field shows the number of good multicast packets transmitted.

Broadcast

This field shows the number of good broadcast packets transmitted.

Pause

This field shows the number of 802.3x Pause packets transmitted.

Tagged

This field shows the number of packets with VLAN tags transmitted.

Rx Packet
The following fields display detailed information about packets received.
RX Packets This field shows the number of good packets (unicast, multicast and
broadcast) received.
Multicast

This field shows the number of good multicast packets received.

Broadcast

This field shows the number of good broadcast packets received.

Pause

This field shows the number of 802.3x Pause packets received.

Control

This field shows the number of control packets received (including those
with CRC error) but it does not include the 802.3x Pause packets.

TX Collision
The following fields display information on collisions while transmitting.

74

Single

This is a count of successfully transmitted packets for which transmission
is inhibited by exactly one collision.

Multiple

This is a count of successfully transmitted packets for which transmission
was inhibited by more than one collision.

Excessive

This is a count of packets for which transmission failed due to excessive
collisions. Excessive collision is defined as the number of maximum
collisions before the retransmission count is reset.

Late

This is the number of times a late collision is detected, that is, after 512
bits of the packets have already been transmitted.

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Table 8 Status > Port Details (continued)
LABEL

DESCRIPTION

Error Packet

The following fields display detailed information about packets received
that were in error.

RX CRC

This field shows the number of packets received with CRC (Cyclic
Redundant Check) error(s).

Length

This field shows the number of packets received with a length that was
out of range.

Runt

This field shows the number of packets received that were too short
(shorter than 64 octets), including the ones with CRC errors.

Distribution
64

This field shows the number of packets (including bad packets) received
that were 64 octets in length.

65-127

This field shows the number of packets (including bad packets) received
that were between 65 and 127 octets in length.

128-255

This field shows the number of packets (including bad packets) received
that were between 128 and 255 octets in length.

256-511

This field shows the number of packets (including bad packets) received
that were between 256 and 511 octets in length.

512-1023

This field shows the number of packets (including bad packets) received
that were between 512 and 1023 octets in length.

10241518

This field shows the number of packets (including bad packets) received
that were between 1024 and 1518 octets in length.

Giant

This field shows the number of packets dropped because they were bigger
than the maximum frame size.

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CHAPTER

8
Basic Setting

This chapter describes how to configure the System Info, General Setup,
Switch Setup, IP Setup and Port Setup screens.

8.1 Overview
The System Info screen displays general Switch information (such as firmware
version number) and hardware polling information (such as fan speeds). The
General Setup screen allows you to configure general Switch identification
information. The General Setup screen also allows you to set the system time
manually or get the current time and date from an external server when you turn
on your Switch. The real time is then displayed in the Switch logs. The Switch
Setup screen allows you to set up and configure global Switch features. The IP
Setup screen allows you to configure a Switch IP address in each routing domain,
subnet mask(s) and DNS (domain name server) for management purposes.

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8.2 System Information
In the navigation panel, click Basic Setting > System Info to display the screen
as shown. You can check the firmware version number and monitor the Switch
temperature, fan speeds and voltage in this screen.

Figure 39 Basic Setting > System Info

The following table describes the labels in this screen.

Table 9 Basic Setting > System Info
LABEL

DESCRIPTION

System
Name

This field displays the descriptive name of the Switch for identification
purposes.

ZyNOS F/W
Version

This field displays the version number of the Switch 's current firmware
including the date created.

Ethernet
Address

This field refers to the Ethernet MAC (Media Access Control) address of the
Switch.

Hardware Monitor

78

Temperature
Unit

The Switch has temperature sensors that are capable of detecting and
reporting if the temperature rises above the threshold. You may choose
the temperature unit (Centigrade or Fahrenheit) in this field.

Temperature

BOARD, PHY, and MAC refer to the location of the temperature sensors
on the Switch printed circuit board.

Current

This shows the current temperature at this sensor.

MAX

This field displays the maximum temperature measured at this sensor.

MIN

This field displays the minimum temperature measured at this sensor.

Threshold

This field displays the upper temperature limit at this sensor.

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Table 9 Basic Setting > System Info (continued)
LABEL

DESCRIPTION

Status

This field displays Normal for temperatures below the threshold and Error
for those above.

Fan Speed
(RPM)

A properly functioning fan is an essential component (along with a
sufficiently ventilated, cool operating environment) in order for the device
to stay within the temperature threshold. Each fan has a sensor that is
capable of detecting and reporting if the fan speed falls below the
threshold shown.

Current

This field displays this fan's current speed in Revolutions Per Minute (RPM).

MAX

This field displays this fan's maximum speed measured in RPM.

MIN

This field displays this fan's minimum speed measured in RPM. “<41" is
displayed for speeds too small to measure (under 2000 RPM).

Threshold

This field displays the minimum speed at which a normal fan should work.

Status

Normal indicates that this fan is functioning above the minimum speed.
Error indicates that this fan is functioning below the minimum speed.

Voltage (V)

The power supply for each voltage has a sensor that is capable of
detecting and reporting if the voltage falls out of the tolerance range.

Current

This is the current voltage reading.

MAX

This field displays the maximum voltage measured at this point.

MIN

This field displays the minimum voltage measured at this point.

Threshold

This field displays the percentage tolerance of the voltage with which the
Switch still works.

Status

Normal indicates that the voltage is within an acceptable operating range
at this point; otherwise Error is displayed.

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8.3 General Setup
Use this screen to configure general settings such as the system name and time.
Click Basic Setting and General Setup in the navigation panel to display the
screen as shown.

Figure 40 Basic Setting > General Setup

The following table describes the labels in this screen.

Table 10 Basic Setting > General Setup

80

LABEL

DESCRIPTION

System Name

Type a descriptive name for identification purposes. This name consists
of up to 64 printable characters; spaces are allowed.

Location

Type the geographic location of your Switch. You can use up to 32
printable ASCII characters; spaces are allowed.

Contact
Person's Name

Type the name of the person in charge of this Switch. You can use up to
32 printable ASCII characters; spaces are allowed.

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Table 10 Basic Setting > General Setup (continued)
LABEL

DESCRIPTION

Use Time
Server when
Bootup

Type the time service protocol that your timeserver uses. Not all time
servers support all protocols, so you may have to use trial and error to
find a protocol that works. The main differences between them are the
time format.
When you select the Daytime (RFC 867) format, the Switch displays
the day, month, year and time with no time zone adjustment. When you
use this format, it is recommended that you use a Daytime timeserver
within your geographical time zone.
Time (RFC-868) format displays a 4-byte integer giving the total
number of seconds since 1970/1/1 at 0:0:0.
NTP (RFC-1305) is similar to Time (RFC-868).
None is the default value. Enter the time manually. Each time you turn
on the Switch, the time and date will be reset to 1970-1-1 0:0.

Time Server IP
Address

Type the IP address of your timeserver. The Switch searches for the
timeserver for up to 60 seconds. If you select a timeserver that is
unreachable, then this screen will appear locked for 60 seconds. Please
wait.

Current Time

This field displays the time you open this menu (or refresh the menu).

New Time
(hh:min:ss)

Enter the new time in hour, minute and second format. The new time
then appears in the Current Time field after you click Apply.

Current Date

This field displays the date you open this menu.

New Date
(yyyy-mm-dd)

Enter the new date in year, month and day format. The new date then
appears in the Current Date field after you click Apply.

Time Zone

Select the time difference between UTC (Universal Time Coordinated,
formerly known as GMT, Greenwich Mean Time) and your time zone from
the drop-down list box.

Daylight
Saving Time

Daylight saving is a period from late spring to early fall when many
countries set their clocks ahead of normal local time by one hour to give
more daytime light in the evening.
Select this option if you use Daylight Saving Time.

Start Date

Configure the day and time when Daylight Saving Time starts if you
selected Daylight Saving Time. The time is displayed in the 24 hour
format. Here are a couple of examples:
Daylight Saving Time starts in most parts of the United States on the
second Sunday of March. Each time zone in the United States starts
using Daylight Saving Time at 2 A.M. local time. So in the United States
you would select Second, Sunday, March and 2:00.
Daylight Saving Time starts in the European Union on the last Sunday of
March. All of the time zones in the European Union start using Daylight
Saving Time at the same moment (1 A.M. GMT or UTC). So in the
European Union you would select Last, Sunday, March and the last
field depends on your time zone. In Germany for instance, you would
select 2:00 because Germany's time zone is one hour ahead of GMT or
UTC (GMT+1).

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Table 10 Basic Setting > General Setup (continued)
LABEL

DESCRIPTION

End Date

Configure the day and time when Daylight Saving Time ends if you
selected Daylight Saving Time. The time field uses the 24 hour
format. Here are a couple of examples:
Daylight Saving Time ends in the United States on the last Sunday of
October. Each time zone in the United States stops using Daylight Saving
Time at 2 A.M. local time. So in the United States you would select First,
Sunday, November and 2:00.
Daylight Saving Time ends in the European Union on the last Sunday of
October. All of the time zones in the European Union stop using Daylight
Saving Time at the same moment (1 A.M. GMT or UTC). So in the
European Union you would select Last, Sunday, October and the last
field depends on your time zone. In Germany for instance, you would
select 2:00 because Germany's time zone is one hour ahead of GMT or
UTC (GMT+1).

Apply

Click Apply to save your changes to the Switch’s run-time memory. The
Switch loses these changes if it is turned off or loses power, so use the
Save link on the top navigation panel to save your changes to the nonvolatile memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

8.4 Introduction to VLANs
A VLAN (Virtual Local Area Network) allows a physical network to be partitioned
into multiple logical networks. Devices on a logical network belong to one group. A
device can belong to more than one group. With VLAN, a device cannot directly
talk to or hear from devices that are not in the same group(s); the traffic must
first go through a router.
In MTU (Multi-Tenant Unit) applications, VLAN is vital in providing isolation and
security among the subscribers. When properly configured, VLAN prevents one
subscriber from accessing the network resources of another on the same LAN,
thus a user will not see the printers and hard disks of another user on the same
network.
VLAN also increases network performance by limiting broadcasts to a smaller and
more manageable logical broadcast domain. In traditional switched environments,
all broadcast packets go to each and every individual port. With VLAN, all
broadcasts are confined to a specific broadcast domain.

Note: VLAN is unidirectional; it only governs outgoing traffic.
See Chapter 9 on page 95 for information on port-based and 802.1Q tagged
VLANs.

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8.4.1 Smart Isolation
To block traffic between two specific ports within the Switch, you can use port
isolation or private VLAN (see Chapter 30 on page 267 for more information).
However, it does not work across multiple switches. For example, broadcast traffic
from isolated ports on a switch (say B) can be forwarded to all ports on other
switches (A and C), including the isolated ports.

A

B
Isolated ports: 2~6
Root port: 7
Designated port: 8

C
Smart isolation allows you to prevent isolated ports on different switches from
transmitting traffic to each other. After you enable RSTP/MRSTP and smart
isolation on the Switch, the designated port(s) will be added to the isolated port
list. In the following example, switch A is the root bridge. Switch B’s root port 7
connects to switch A and switch B’s designated port 8 connects to switch C. Traffic
from isolated ports on switch B can only be sent through non-isolated port 1 or
root port 7 to switch A. This prevents isolated ports on switch B sending traffic
through designated port 8 to switch C. Traffic received on designated port 8 from
switch C will not be forwarded to any other isolated ports on switch B.

A

B

Before Smart Isolation:
Isolated ports: 2~6
Root port: 7
Designated port: 8
After Smart Isolation:
Isolated ports: 2~6, 8
Root port: 7
Designated port: 8

C

You should enable RSTP or MRSTP before you can use smart isolation on the
Switch. If the network topology changes, the Switch automatically updates the
isolated port list with the latest designated port information.

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Note: The uplink port connected to the Internet should be the root port. Otherwise,
with smart isolation enabled, the isolated ports cannot access the Internet.

8.5 Switch Setup Screen
Click Basic Setting and then Switch Setup in the navigation panel to display the
screen as shown. The VLAN setup screens change depending on whether you
choose 802.1Q or Port Based in the VLAN Type field in this screen. Refer to the
chapter on VLAN.

Figure 41 Basic Setting > Switch Setup

The following table describes the labels in this screen.

Table 11 Basic Setting > Switch Setup

84

LABEL

DESCRIPTION

VLAN Type

Choose 802.1Q or Port Based. The VLAN Setup screen changes
depending on whether you choose 802.1Q VLAN type or Port Based
VLAN type in this screen. See Chapter 9 on page 95 for more
information.

Bridge Control
Protocol
Transparency

Select Active to allow the Switch to handle bridging control protocols
(STP, for example). You also need to define how to treat a BPDU in the
Port Setup screen.

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Table 11 Basic Setting > Switch Setup (continued)
LABEL

DESCRIPTION

Smart
Isolation

Select Active to enable smart isolation on the Switch. The designated
port(s) then becomes the isolated port. Smart isolation allows you to
prevent isolated ports on different switches from transmitting traffic to
each other.

Note: To use smart isolation, you should have configured 802.1Q
VLAN port isolation or private VLAN and (M)RSTP on the
Switch. Smart isolation does not work with MSTP and/or portbased VLAN.
MAC Address
Learning

MAC address learning reduces outgoing traffic broadcasts. For MAC
address learning to occur on a port, the port must be active.

Aging Time

Enter a time from 10 to 1000000 seconds. This is how long all
dynamically learned MAC addresses remain in the MAC address table
before they age out (and must be relearned).

GARP Timer: Switches join VLANs by making a declaration. A declaration is made by
issuing a Join message using GARP. Declarations are withdrawn by issuing a Leave
message. A Leave All message terminates all registrations. GARP timers set declaration
timeout values. See Chapter 9 on page 95 for more background information.
Join Timer

Join Timer sets the duration of the Join Period timer for GVRP in
milliseconds. Each port has a Join Period timer. The allowed Join Time
range is between 100 and 65535 milliseconds; the default is 200
milliseconds. See Chapter 9 on page 95 for more background
information.

Leave Timer

Leave Time sets the duration of the Leave Period timer for GVRP in
milliseconds. Each port has a single Leave Period timer. Leave Time
must be two times larger than Join Timer; the default is 600
milliseconds.

Leave All
Timer

Leave All Timer sets the duration of the Leave All Period timer for GVRP in
milliseconds. Each port has a single Leave All Period timer. Leave All
Timer must be larger than Leave Timer.

Priority Queue Assignment
IEEE 802.1p defines up to eight separate traffic types by inserting a tag into a MAC-layer
frame that contains bits to define class of service. Frames without an explicit priority tag
are given the default priority of the ingress port. Use the following fields to configure the
priority level-to-physical queue mapping.
The Switch has eight physical queues that you can map to the 8 priority levels. On the
Switch, traffic assigned to higher index queues gets through faster while traffic in lower
index queues is dropped if the network is congested.
Priority Level (The following descriptions are based on the traffic types defined in the IEEE
802.1d standard (which incorporates the 802.1p).
Level 7

Typically used for network control traffic such as router configuration
messages.

Level 6

Typically used for voice traffic that is especially sensitive to jitter (jitter is
the variations in delay).

Level 5

Typically used for video that consumes high bandwidth and is sensitive to
jitter.

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Table 11 Basic Setting > Switch Setup (continued)
LABEL

DESCRIPTION

Level 4

Typically used for controlled load, latency-sensitive traffic such as SNA
(Systems Network Architecture) transactions.

Level 3

Typically used for “excellent effort” or better than best effort and would
include important business traffic that can tolerate some delay.

Level 2

This is for “spare bandwidth”.

Level 1

This is typically used for non-critical “background” traffic such as bulk
transfers that are allowed but that should not affect other applications
and users.

Level 0

Typically used for best-effort traffic.

Apply

Click Apply to save your changes to the Switch’s run-time memory. The
Switch loses these changes if it is turned off or loses power, so use the
Save link on the top navigation panel to save your changes to the nonvolatile memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

8.6 IP Setup
Use the IP Setup screen to configure the default gateway device, the default
domain name server and add IP domains.

8.6.1 IP Interfaces
The Switch needs an IP address for it to be managed over the network. The
factory default IP address is 192.168.1.1. The subnet mask specifies the network
number portion of an IP address. The factory default subnet mask is
255.255.255.0.
On the Switch, as a layer-3 device, an IP address is not bound to any physical
ports. Since each IP address on the Switch must be in a separate subnet, the
configured IP address is also known as IP interface (or routing domain). In
addition, this allows routing between subnets based on the IP address without
additional routers.
You can configure multiple routing domains on the same VLAN as long as the IP
address ranges for the domains do not overlap. To change the IP address of the

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Switch in a routing domain, simply add a new routing domain entry with a
different IP address in the same subnet.

Figure 42 Basic Setting > IP Setup

The following table describes the labels in this screen.

Table 12 Basic Setting > IP Setup
LABEL

DESCRIPTION

Default
Gateway

Type the IP address of the default outgoing gateway in dotted decimal
notation, for example 192.168.1.254.

Domain
Name Server

DNS (Domain Name System) is for mapping a domain name to its
corresponding IP address and vice versa. Enter a domain name server IP
address in order to be able to use a domain name instead of an IP address.

Default
Management

Specify which traffic flow (In-Band or Out-of-band) the Switch is to send
packets originating from itself (such as SNMP traps) or packets with
unknown source.
Select Out-of-band to have the Switch send the packets to the
management port labelled MGMT. This means that device(s) connected to
the other port(s) do not receive these packets.
Select In-Band to have the Switch send the packets to all ports except the
management port (labelled MGMT) to which connected device(s) do not
receive these packets.

Management IP Address
Use these fields to set the settings for the out-of-band management port.

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Table 12 Basic Setting > IP Setup (continued)
LABEL

DESCRIPTION

IP
Address

Enter the out-of-band management IP address of your Switch in dotted
decimal notation. For example, 192.168.0.1.

IP Subnet
Mask

Enter the IP subnet mask of your Switch in dotted decimal notation, for
example, 255.255.255.0.

Default
Gateway

Enter the IP address of the default outgoing gateway in dotted decimal
notation, for example, 192.168.0.254

Apply

Click Apply to save your changes to the Switch’s run-time memory. The
Switch loses these changes if it is turned off or loses power, so use the
Save link on the top navigation panel to save your changes to the nonvolatile memory when you are done configuring.

Cancel

Click Cancel to reset the fields to your previous configuration.

IP Interface
Use these fields to create or edit IP routing domains on the Switch.
IP
Address

Enter the IP address of your Switch in dotted decimal notation, for
example, 192.168.1.1. This is the IP address of the Switch in an IP routing
domain.

IP Subnet
Mask

Enter the IP subnet mask of an IP routing domain in dotted decimal
notation, for example, 255.255.255.0.

VID

Enter the VLAN identification number to which an IP routing domain
belongs.

Add

Click Add to save your changes to the Switch’s run-time memory. The
Switch loses these changes if it is turned off or loses power, so use the
Save link on the top navigation panel to save your changes to the nonvolatile memory when you are done configuring.

Cancel

Click Cancel to reset the fields to your previous configuration.

Index

This field displays the index number of an entry.

IP Address

This field displays IP address of the Switch in the IP domain.

IP Subnet
Mask

This field displays the subnet mask of the Switch in the IP domain.

VID

This field displays the VLAN identification number of the IP domain on the
Switch.

Delete

Click Delete to remove the selected entry from the summary table.

Note: Deleting all IP subnets locks you out of the Switch.
Cancel

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Click Cancel to clear the Delete check boxes.

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8.7 Port Setup
Use this screen to configure Switch port settings.Click Basic Setting > Port
Setup in the navigation panel to display the configuration screen.

Figure 43 Basic Setting > Port Setup

The following table describes the labels in this screen.

Table 13 Basic Setting > Port Setup
LABEL

DESCRIPTION

Port

This is the port index number.

*

Settings in this row apply to all ports.
Use this row only if you want to make some settings the same for all ports.
Use this row first to set the common settings and then make adjustments
on a port-by-port basis.

Note: Changes in this row are copied to all the ports as soon as you
make them.
Active

Select this check box to enable a port. The factory default for all ports is
enabled. A port must be enabled for data transmission to occur.

Name

Type a descriptive name that identifies this port. You can enter up to 64
alpha-numerical characters.

Note: Due to space limitations, the port name may be truncated in
some web configurator screens.
Type

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This field displays 10/100/1000M for a 1000Base-T connection, 10G for
a 10 Gigabit Ethernet connection and 12G for a 10GBase-CX4 connection.

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Table 13 Basic Setting > Port Setup (continued)
LABEL

DESCRIPTION

Speed/
Duplex

Select the speed and the duplex mode of the Ethernet connection on this
port. The choices are Auto, 10M/Half Duplex, 10M/Full Duplex,
100M/Half Duplex and 100M/Full Duplex for a 1000Base-T
connection. 1000M/Full Duplex is supported by both 1000Base-T and
1000Base-X connections. 10G/Full Duplex is supported by the 10 Gigabit
Ethernet connections. 12G/Full Duplex is supported by the 10GBase-CX4
connections.
Selecting Auto (auto-negotiation) allows one port to negotiate with a peer
port automatically to obtain the connection speed and duplex mode that
both ends support. When auto-negotiation is turned on, a port on the
Switch negotiates with the peer automatically to determine the connection
speed and duplex mode. If the peer port does not support auto-negotiation
or turns off this feature, the Switch determines the connection speed by
detecting the signal on the cable and using half duplex mode. When the
Switch’s auto-negotiation is turned off, a port uses the pre-configured
speed and duplex mode when making a connection, thus requiring you to
make sure that the settings of the peer port are the same in order to
connect.

Flow Control

A concentration of traffic on a port decreases port bandwidth and overflows
buffer memory causing packet discards and frame losses. Flow Control is
used to regulate transmission of signals to match the bandwidth of the
receiving port.
The Switch uses IEEE 802.3x flow control in full duplex mode and
backpressure flow control in half duplex mode.
IEEE 802.3x flow control is used in full duplex mode to send a pause signal
to the sending port, causing it to temporarily stop sending signals when
the receiving port memory buffers fill.
Back Pressure flow control is typically used in half duplex mode to send a
"collision" signal to the sending port (mimicking a state of packet collision)
causing the sending port to temporarily stop sending signals and resend
later. Select Flow Control to enable it.

802.1p
Priority

This priority value is added to incoming frames without a (802.1p) priority
queue tag. See Priority Queue Assignment in Table 11 on page 84 for
more information.

BPDU
Control

Configure the way to treat BPDUs received on this port. You must activate
bridging control protocol transparency in the Switch Setup screen first.
Select Peer to process any BPDU (Bridge Protocol Data Units) received on
this port.
Select Tunnel to forward BPDUs received on this port.
Select Discard to drop any BPDU received on this port.
Select Network to process a BPDU with no VLAN tag and forward a tagged
BPDU.

CX4 Cable

90

Select the number of meters for the length of the 10GBASE-CX4 cable you
use to connect between the Switch and another switch for stacking.

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Table 13 Basic Setting > Port Setup (continued)
LABEL

DESCRIPTION

Apply

Click Apply to save your changes to the Switch’s run-time memory. The
Switch loses these changes if it is turned off or loses power, so use the
Save link on the top navigation panel to save your changes to the nonvolatile memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

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Advanced Setup
VLAN (95)

Loop Guard (255)

Static MAC Forward Setup (115)

VLAN Mapping (259)

Static Multicast Forward Setup (119)

Layer 2 Protocol Tunneling (263)

Filtering (123)

Private VLAN (267)

Spanning Tree Protocol (125)
Bandwidth Control (145)
Broadcast Storm Control (149)
Mirroring (151)
Link Aggregation (153)
Port Authentication (163)
Port Security (169)
Classifier (173)
Policy Rule (179)
Queuing Method (187)
VLAN Stacking (191)
Multicast (199)
AAA (215)
IP Source Guard (231)

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9
VLAN

The type of screen you see here depends on the VLAN Type you selected in the
Switch Setup screen. This chapter shows you how to configure 802.1Q tagged
and port-based VLANs.

9.1 Introduction to IEEE 802.1Q Tagged VLANs
A tagged VLAN uses an explicit tag (VLAN ID) in the MAC header to identify the
VLAN membership of a frame across bridges - they are not confined to the switch
on which they were created. The VLANs can be created statically by hand or
dynamically through GVRP. The VLAN ID associates a frame with a specific VLAN
and provides the information that switches need to process the frame across the
network. A tagged frame is four bytes longer than an untagged frame and
contains two bytes for the TPID (Tag Protocol Identifier, residing within the type/
length field of the Ethernet frame) and two bytes for the TCI (Tag Control
Information, starting after the source address field of the Ethernet frame).
The CFI (Canonical Format Indicator) is a single-bit flag, always set to zero for
Ethernet switches. If a frame received at an Ethernet port has a CFI set to 1, then
that frame should not be forwarded as it is to an untagged port. The remaining
twelve bits define the VLAN ID, giving a possible maximum number of 4,096
VLANs. Note that user priority and VLAN ID are independent of each other. A
frame with VID (VLAN Identifier) of null (0) is called a priority frame, meaning that
only the priority level is significant and the default VID of the ingress port is given
as the VID of the frame. Of the 4096 possible VIDs, a VID of 0 is used to identify
priority frames and the value 4095 (FFF) is reserved, so the maximum possible
number of VLAN configurations is 4,094.
TPID

User Priority

2 Bytes 3 Bits

CFI

VLAN ID

1 Bit

12 bits

9.1.1 Forwarding Tagged and Untagged Frames
Each port on the Switch is capable of passing tagged or untagged frames. To
forward a frame from an 802.1Q VLAN-aware switch to an 802.1Q VLAN-unaware

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switch, the Switch first decides where to forward the frame and then strips off the
VLAN tag. To forward a frame from an 802.1Q VLAN-unaware switch to an 802.1Q
VLAN-aware switch, the Switch first decides where to forward the frame, and then
inserts a VLAN tag reflecting the ingress port's default VID. The default PVID is
VLAN 1 for all ports, but this can be changed.
A broadcast frame (or a multicast frame for a multicast group that is known by the
system) is duplicated only on ports that are members of the VID (except the
ingress port itself), thus confining the broadcast to a specific domain.

9.2 Automatic VLAN Registration
GARP and GVRP are the protocols used to automatically register VLAN
membership across switches.

9.2.1 GARP
GARP (Generic Attribute Registration Protocol) allows network switches to register
and de-register attribute values with other GARP participants within a bridged
LAN. GARP is a protocol that provides a generic mechanism for protocols that
serve a more specific application, for example, GVRP.

9.2.1.1 GARP Timers
Switches join VLANs by making a declaration. A declaration is made by issuing a
Join message using GARP. Declarations are withdrawn by issuing a Leave
message. A Leave All message terminates all registrations. GARP timers set
declaration timeout values.

9.2.2 GVRP
GVRP (GARP VLAN Registration Protocol) is a registration protocol that defines a
way for switches to register necessary VLAN members on ports across the
network. Enable this function to permit VLAN groups beyond the local Switch.
Please refer to the following table for common IEEE 802.1Q VLAN terminology.

Table 14 IEEE 802.1Q VLAN Terminology

96

VLAN
PARAMETER

TERM

DESCRIPTION

VLAN Type

Permanent VLAN

This is a static VLAN created manually.

Dynamic VLAN

This is a VLAN configured by a GVRP registration/
deregistration process.

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Table 14 IEEE 802.1Q VLAN Terminology (continued)
VLAN
PARAMETER
VLAN
Administrative
Control

VLAN Tag Control

VLAN Port

TERM

DESCRIPTION

Registration Fixed

Fixed registration ports are permanent VLAN
members.

Registration
Forbidden

Ports with registration forbidden are forbidden to
join the specified VLAN.

Normal
Registration

Ports dynamically join a VLAN using GVRP.

Tagged

Ports belonging to the specified VLAN tag all
outgoing frames transmitted.

Untagged

Ports belonging to the specified VLAN don't tag all
outgoing frames transmitted.

Port VID

This is the VLAN ID assigned to untagged frames
that this port received.

Acceptable Frame
Type

You may choose to accept both tagged and
untagged incoming frames, just tagged incoming
frames or just untagged incoming frames on a
port.

Ingress filtering

If set, the Switch discards incoming frames for
VLANs that do not have this port as a member.

9.3 Port VLAN Trunking
Enable VLAN Trunking on a port to allow frames belonging to unknown VLAN
groups to pass through that port. This is useful if you want to set up VLAN groups
on end devices without having to configure the same VLAN groups on
intermediary devices.
The following figure describes VLAN Trunking. Suppose you want to create VLAN
groups 1 and 2 (V1 and V2) on devices A and B. Without VLAN Trunking, you
must configure VLAN groups 1 and 2 on all intermediary switches C, D and E;
otherwise they will drop frames with unknown VLAN group tags. However, with
VLAN Trunking enabled on a port(s) in each intermediary switch you only need
to create VLAN groups in the end devices (A and B). C, D and E automatically

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allow frames with VLAN group tags 1 and 2 (VLAN groups that are unknown to
those switches) to pass through their VLAN trunking port(s).

Figure 44 Port VLAN Trunking

9.4 Select the VLAN Type
Select a VLAN type in the Basic Setting > Switch Setup screen.

Figure 45 Switch Setup: Select VLAN Type

9.5 Static VLAN
Use a static VLAN to decide whether an incoming frame on a port should be
• sent to a VLAN group as normal depending on its VLAN tag.
• sent to a group whether it has a VLAN tag or not.
• blocked from a VLAN group regardless of its VLAN tag.
You can also tag all outgoing frames (that were previously untagged) from a port
with the specified VID.

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9.5.1 VLAN Status
See Section 9.1 on page 95 for more information on Static VLAN. Click Advanced
Application > VLAN from the navigation panel to display the VLAN Status
screen as shown next.

Figure 46 Advanced Application > VLAN: VLAN Status

The following table describes the labels in this screen.

Table 15 Advanced Application > VLAN: VLAN Status
LABEL

DESCRIPTION

VLAN Search
by VID

Enter an existing VLAN ID number(s) (separated by a comma) and click
Search to display only the specified VLAN(s) in the list below.
Leave this field blank and click Search to display all VLANs configured on
the Switch.

The Number
of VLAN

This is the number of VLANs configured on the Switch.

The Number
of Search
Results

This is the number of VLANs that match the searching criteria and display
in the list below.
This field displays only when you use the Search button to look for
certain VLANs.

Index

This is the VLAN index number. Click on an index number to view more
VLAN details.

VID

This is the VLAN identification number that was configured in the Static
VLAN screen.

Elapsed Time

This field shows how long it has been since a normal VLAN was registered
or a static VLAN was set up.

Status

This field shows how this VLAN was added to the Switch; dynamic using GVRP, static - added as a permanent entry or other - added in
another way such as via Multicast VLAN Registration (MVR).

Change Pages

Click Previous or Next to show the previous/next screen if all status
information cannot be seen in one screen.

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9.5.2 VLAN Details
Use this screen to view detailed port settings and status of the VLAN group. See
Section 9.1 on page 95 for more information on static VLAN. Click on an index
number in the VLAN Status screen to display VLAN details.

Figure 47 Advanced Application > VLAN > VLAN Detail

The following table describes the labels in this screen.

Table 16 Advanced Application > VLAN > VLAN Detail
LABEL

DESCRIPTION

VLAN Status

Click this to go to the VLAN Status screen.

VID

This is the VLAN identification number that was configured in the Static
VLAN screen.

Port Number

This column displays the ports that are participating in a VLAN. A tagged
port is marked as T, an untagged port is marked as U and ports not
participating in a VLAN are marked as “–“.

Elapsed Time

This field shows how long it has been since a normal VLAN was registered
or a static VLAN was set up.

Status

This field shows how this VLAN was added to the Switch; dynamic using GVRP, static - added as a permanent entry or other - added in
another way such as via Multicast VLAN Registration (MVR).

9.5.3 Configure a Static VLAN
Use this screen to configure and view 802.1Q VLAN parameters for the Switch.
See Section 9.1 on page 95 for more information on static VLAN. To configure a

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static VLAN, click Static VLAN in the VLAN Status screen to display the screen
as shown next.

Figure 48 Advanced Application > VLAN > Static VLAN

The following table describes the related labels in this screen.

Table 17 Advanced Application > VLAN > Static VLAN
LABEL

DESCRIPTION

ACTIVE

Select this check box to activate the VLAN settings.

Name

Enter a descriptive name for the VLAN group for identification purposes.
This name consists of up to 64 printable characters; spaces are allowed.

VLAN Group
ID

Enter the VLAN ID for this static entry; the valid range is between 1 and
4094.

Port

The port number identifies the port you are configuring.

*

Settings in this row apply to all ports.
Use this row only if you want to make some settings the same for all
ports. Use this row first to set the common settings and then make
adjustments on a port-by-port basis.

Note: Changes in this row are copied to all the ports as soon as you
make them.

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Table 17 Advanced Application > VLAN > Static VLAN (continued)
LABEL

DESCRIPTION

Control

Select Normal for the port to dynamically join this VLAN group using
GVRP. This is the default selection.
Select Fixed for the port to be a permanent member of this VLAN group.
Select Forbidden if you want to prohibit the port from joining this VLAN
group.

Tagging

Select TX Tagging if you want the port to tag all outgoing frames
transmitted with this VLAN Group ID.

Add

Click Add to save your changes to the Switch’s run-time memory. The
Switch loses these changes if it is turned off or loses power, so use the
Save link on the top navigation panel to save your changes to the nonvolatile memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

Clear

Click Clear to start configuring the screen again.

VID

This field displays the ID number of the VLAN group. Click the number to
edit the VLAN settings.

Active

This field indicates whether the VLAN settings are enabled (Yes) or
disabled (No).

Name

This field displays the descriptive name for this VLAN group.

Delete

Click Delete to remove the selected entry from the summary table.

Cancel

Click Cancel to clear the Delete check boxes.

9.5.4 Configure VLAN Port Settings
Use the VLAN Port Setting screen to configure the static VLAN (IEEE 802.1Q)
settings on a port. See Section 9.1 on page 95 for more information on static
VLAN. Click the VLAN Port Setting link in the VLAN Status screen.

Figure 49 Advanced Application > VLAN > VLAN Port Setting

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The following table describes the labels in this screen.

Table 18 Advanced Application > VLAN > VLAN Port Setting
LABEL

DESCRIPTION

GVRP

GVRP (GARP VLAN Registration Protocol) is a registration protocol that
defines a way for switches to register necessary VLAN members on
ports across the network.
Select this check box to permit VLAN groups beyond the local Switch.

Port

This field displays the port number.

*

Settings in this row apply to all ports.
Use this row only if you want to make some settings the same for all
ports. Use this row first to set the common settings and then make
adjustments on a port-by-port basis.

Note: Changes in this row are copied to all the ports as soon as you
make them.
Ingress Check

If this check box is selected for a port, the Switch discards incoming
frames for VLANs that do not include this port in its member set.
Clear this check box to disable ingress filtering.

PVID

Enter a number between 1and 4094 as the port VLAN ID.

GVRP

Select this check box to allow GVRP on this port.

Acceptable
Frame Type

Specify the type of frames allowed on a port. Choices are All and Tag
Only.
Select All from the drop-down list box to accept all untagged or tagged
frames on this port. This is the default setting.
Select Tag Only to accept only tagged frames on this port. All untagged
frames will be dropped.

VLAN Trunking

Enable VLAN Trunking on ports connected to other switches or routers
(but not ports directly connected to end users) to allow frames
belonging to unknown VLAN groups to pass through the Switch.

Isolation

Select this to allows this port to communicate only with the CPU
management port and the ports on which the isolation feature is not
enabled.

Apply

Click Apply to save your changes to the Switch’s run-time memory. The
Switch loses these changes if it is turned off or loses power, so use the
Save link on the top navigation panel to save your changes to the nonvolatile memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

9.6 Subnet Based VLANs
Subnet based VLANs allow you to group traffic into logical VLANs based on the
source IP subnet you specify. When a frame is received on a port, the Switch
checks if a tag is added already and the IP subnet it came from. The untagged

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packets from the same IP subnet are then placed in the same subnet based VLAN.
One advantage of using subnet based VLANs is that priority can be assigned to
traffic from the same IP subnet.
For example, an ISP (Internet Service Provider) may divide different types of
services it provides to customers into different IP subnets. Traffic for voice
services is designated for IP subnet 172.16.1.0/24, video for 192.168.1.0/24 and
data for 10.1.1.0/24. The Switch can then be configured to group incoming traffic
based on the source IP subnet of incoming frames.
You can then configure a subnet based VLAN with priority 6 and VID of 100 for
traffic received from IP subnet 172.16.1.0/24 (voice services). You can also have
a subnet based VLAN with priority 5 and VID of 200 for traffic received from IP
subnet 192.168.1.0/24 (video services). Lastly, you can configure VLAN with
priority 3 and VID of 300 for traffic received from IP subnet 10.1.1.0/24 (data
services). All untagged incoming frames will be classified based on their source IP
subnet and prioritized accordingly. That is, video services receive the highest
priority and data the lowest.

Figure 50 Subnet Based VLAN Application Example
Tagged Frames

Internet
Untagged
Frames

172.16.1.0/24
VID = 100

192.168.1.0/24
VID = 200

10.1.1.0/24
VID = 300

9.7 Configuring Subnet Based VLAN
Click Subnet Based VLAN in the VLAN Port Setting screen to display the
configuration screen as shown.

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Note: Subnet based VLAN applies to un-tagged packets and is applicable only when
you use IEEE 802.1Q tagged VLAN.
Figure 51 Advanced Application > VLAN > VLAN Port Setting > Subnet Based
VLAN

The following table describes the labels in this screen.

Table 19 Advanced Application > VLAN > VLAN Port Setting > Subnet Based VLAN
Setup
LABEL

DESCRIPTION

Active

Check this box to activate this subnet based VLANs on the Switch.

DHCP-Vlan
Override

When DHCP snooping is enabled DHCP clients can renew their IP address
through the DHCP VLAN or via another DHCP server on the subnet based
VLAN.
Select this checkbox to force the DHCP clients in this IP subnet to obtain
their IP addresses through the DHCP VLAN.

Apply

Click Apply to save your changes to the Switch’s run-time memory. The
Switch loses these changes if it is turned off or loses power, so use the
Save link on the top navigation panel to save your changes to the nonvolatile memory when you are done configuring.

Active

Check this box to activate the IP subnet VLAN you are creating or editing.

Name

Enter up to 32 alphanumeric characters to identify this subnet based VLAN.

IP

Enter the IP address of the subnet for which you want to configure this
subnet based VLAN.

Mask-Bits

Enter the bit number of the subnet mask. To find the bit number, convert
the subnet mask to binary format and add all the 1’s together. Take
“255.255.255.0” for example. 255 converts to eight 1s in binary. There are
three 255s, so add three eights together and you get the bit number (24).

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Table 19 Advanced Application > VLAN > VLAN Port Setting > Subnet Based VLAN
Setup (continued)
LABEL

DESCRIPTION

VID

Enter the ID of a VLAN with which the untagged frames from the IP subnet
specified in this subnet based VLAN are tagged. This must be an existing
VLAN which you defined in the Advanced Applications > VLAN screens.

Priority

Select the priority level that the Switch assigns to frames belonging to this
VLAN.

Add

Click Add to save your changes to the Switch’s run-time memory. The
Switch loses these changes if it is turned off or loses power, so use the
Save link on the top navigation panel to save your changes to the nonvolatile memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

Index

This is the index number identifying this subnet based VLAN. Click on any
of these numbers to edit an existing subnet based VLAN.

Active

This field shows whether the subnet based VLAN is active or not.

Name

This field shows the name the subnet based VLAN.

IP

This field shows the IP address of the subnet for this subnet based VLAN.

Mask-Bits

This field shows the subnet mask in bit number format for this subnet
based VLAN.

VID

This field shows the VLAN ID of the frames which belong to this subnet
based VLAN.

Priority

This field shows the priority which is assigned to frames belonging to this
subnet based VLAN.

Delete

Click this to delete the subnet based VLANs which you marked for deletion.

Cancel

Click Cancel to begin configuring this screen afresh.

9.8 Protocol Based VLANs
Protocol based VLANs allow you to group traffic into logical VLANs based on the
protocol you specify. When an upstream frame is received on a port (configured
for a protocol based VLAN), the Switch checks if a tag is added already and its
protocol. The untagged packets of the same protocol are then placed in the same
protocol based VLAN. One advantage of using protocol based VLANs is that priority
can be assigned to traffic of the same protocol.

Note: Protocol based VLAN applies to un-tagged packets and is applicable only when
you use IEEE 802.1Q tagged VLAN.
For example, ports 1, 2, 3 and 4 belong to static VLAN 100, and ports 4, 5, 6, 7
belong to static VLAN 120. You can configure a protocol based VLAN A with priority
3 for ARP traffic received on port 1, 2 and 3. You can also have a protocol based
VLAN B with priority 2 for Apple Talk traffic received on port 6 and 7. All upstream
ARP traffic from port 1, 2 and 3 will be grouped together, and all upstream Apple

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Talk traffic from port 6 and 7 will be in another group and have higher priority than
ARP traffic when they go through the uplink port to a backbone switch C.

Figure 52 Protocol Based VLAN Application Example

9.9 Configuring Protocol Based VLAN
Click Protocol Based VLAN in the VLAN Port Setting screen to display the
configuration screen as shown.

Figure 53 Advanced Application > VLAN > VLAN Port Setting > Protocol Based
VLAN

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The following table describes the labels in this screen.

Table 20 Advanced Application > VLAN > VLAN Port Setting > Protocol Based
VLAN Setup
LABEL

DESCRIPTION

Active

Check this box to activate this protocol based VLAN.

Port

Type a port number to be included in this protocol based VLAN.
This port must belong to a static VLAN in order to participate in a protocol
based VLAN. See Chapter 9 on page 95 for more details on setting up
VLANs.

Name

Enter up to 32 alphanumeric characters to identify this protocol based
VLAN.

Ethernettype

Use the drop down list box to select a predefined protocol to be included in
this protocol based VLAN or select Others and type the protocol number in
hexadecimal notation. For example, the IP protocol in hexadecimal
notation is 0800, and Novell IPX protocol is 8137.

Note: Protocols in the hexadecimal number range of 0x0000 to 0x05ff
are not allowed to be used for protocol based VLANs.

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VID

Enter the ID of a VLAN to which the port belongs. This must be an existing
VLAN which you defined in the Advanced Applications > VLAN screens.

Priority

Select the priority level that the Switch will assign to frames belonging to
this VLAN.

Add

Click Add to save your changes to the Switch’s run-time memory. The
Switch loses these changes if it is turned off or loses power, so use the
Save link on the top navigation panel to save your changes to the nonvolatile memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

Index

This is the index number identifying this protocol based VLAN. Click on any
of these numbers to edit an existing protocol based VLAN.

Active

This field shows whether the protocol based VLAN is active or not.

Port

This field shows which port belongs to this protocol based VLAN.

Name

This field shows the name the protocol based VLAN.

Ethernettype

This field shows which Ethernet protocol is part of this protocol based
VLAN.

VID

This field shows the VLAN ID of the port.

Priority

This field shows the priority which is assigned to frames belonging to this
protocol based VLAN.

Delete

Click this to delete the protocol based VLANs which you marked for
deletion.

Cancel

Click Cancel to begin configuring this screen afresh.

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9.10 Create an IP-based VLAN Example
This example shows you how to create an IP VLAN which includes ports 1, 4 and
8. Follow these steps using the screen below:
1

Activate this protocol based VLAN.

2

Type the port number you want to include in this protocol based VLAN. Type 1.

3

Give this protocol-based VLAN a descriptive name. Type IP-VLAN.

4

Select the protocol. Leave the default value IP.

5

Type the VLAN ID of an existing VLAN. In our example we already created a static
VLAN with an ID of 5. Type 5.

6

Leave the priority set to 0 and click Add.

Figure 54 Protocol Based VLAN Configuration Example

EXAMPLE
To add more ports to this protocol based VLAN.
1

Click the index number of the protocol based VLAN entry. Click 1

2

Change the value in the Port field to the next port you want to add.

3

Click Add.

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9.11 Port-based VLAN Setup
Port-based VLANs are VLANs where the packet forwarding decision is based on the
destination MAC address and its associated port.
Port-based VLANs require allowed outgoing ports to be defined for each port.
Therefore, if you wish to allow two subscriber ports to talk to each other, for
example, between conference rooms in a hotel, you must define the egress (an
egress port is an outgoing port, that is, a port through which a data packet leaves)
for both ports.
Port-based VLANs are specific only to the Switch on which they were created.

Note: When you activate port-based VLAN, the Switch uses a default VLAN ID of 1.
You cannot change it.
Note: In screens (such as IP Setup and Filtering) that require a VID, you must enter
1 as the VID.
The port-based VLAN setup screen is shown next. The CPU management port
forms a VLAN with all Ethernet ports.

9.11.1 Configure a Port-based VLAN
Select Port Based as the VLAN Type in the Switch Setup screen and then click
VLAN from the navigation panel to display the following screen. Select either All
Connected or Port Isolated from the drop-down list depending on your VLAN
and VLAN security requirements. If VLAN members need to communicate directly
with each other, then select All Connected. Select Port Isolated if you want to
restrict users from communicating directly. Click Apply to save your settings.

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The following screen shows users on a port-based, all-connected VLAN
configuration.

Figure 55 Advanced Application > VLAN > Port Based VLAN Setup (All Connected)

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The following screen shows users on a port-based, port-isolated VLAN
configuration.

Figure 56 Advanced Application > VLAN: Port Based VLAN Setup (Port Isolation)

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The following table describes the labels in this screen.

Table 21 Advanced Application > VLAN: Port Based VLAN Setup
LABEL

DESCRIPTION

Setting
Wizard

Choose All connected or Port isolation.
All connected means all ports can communicate with each other, that is,
there are no virtual LANs. All incoming and outgoing ports are selected.
This option is the most flexible but also the least secure.
Port isolation means that each port can only communicate with the CPU
management port and cannot communicate with each other. All incoming
ports are selected while only the CPU outgoing port is selected. This option
is the most limiting but also the most secure.
After you make your selection, click Apply (top right of screen) to display
the screens as mentioned above. You can still customize these settings by
adding/deleting incoming or outgoing ports, but you must also click Apply
at the bottom of the screen.

Incoming

These are the ingress ports; an ingress port is an incoming port, that is, a
port through which a data packet enters. If you wish to allow two
subscriber ports to talk to each other, you must define the ingress port for
both ports. The numbers in the top row denote the incoming port for the
corresponding port listed on the left (its outgoing port). CPU refers to the
Switch management port. By default it forms a VLAN with all Ethernet
ports. If it does not form a VLAN with a particular port then the Switch
cannot be managed from that port.

Outgoing

These are the egress ports. An egress port is an outgoing port, that is, a
port through which a data packet leaves. If you wish to allow two
subscriber ports to talk to each other, you must define the egress port for
both ports. CPU refers to the Switch management port. By default it forms
a VLAN with all Ethernet ports. If it does not form a VLAN with a particular
port then the Switch cannot be managed from that port.

Apply

Click Apply to save your changes to the Switch’s run-time memory. The
Switch loses these changes if it is turned off or loses power, so use the
Save link on the top navigation panel to save your changes to the nonvolatile memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

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10

Static MAC Forward Setup
Use these screens to configure static MAC address forwarding.

10.1 Overview
This chapter discusses how to configure forwarding rules based on MAC addresses
of devices on your network.

10.2 Configuring Static MAC Forwarding
A static MAC address is an address that has been manually entered in the MAC
address table. Static MAC addresses do not age out. When you set up static MAC
address rules, you are setting static MAC addresses for a port. This may reduce
the need for broadcasting.
Static MAC address forwarding together with port security allows only computers
in the MAC address table on a port to access the Switch. See Chapter 19 on page
169 for more information on port security.

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Click Advanced Applications > Static MAC Forwarding in the navigation panel
to display the configuration screen as shown.

Figure 57 Advanced Application > Static MAC Forwarding

The following table describes the labels in this screen.

Table 22 Advanced Application > Static MAC Forwarding
LABEL

DESCRIPTION

Active

Select this check box to activate your rule. You may temporarily deactivate
a rule without deleting it by clearing this check box.

Name

Enter a descriptive name for identification purposes for this static MAC
address forwarding rule.

MAC Address Enter the MAC address in valid MAC address format, that is, six
hexadecimal character pairs.

Note: Static MAC addresses do not age out.
VID

Enter the VLAN identification number.

Port

Enter the port where the MAC address entered in the previous field will be
automatically forwarded.

Add

Click Add to save your rule to the Switch’s run-time memory. The Switch
loses this rule if it is turned off or loses power, so use the Save link on the
top navigation panel to save your changes to the non-volatile memory
when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

Clear

Click Clear to reset the fields to the factory defaults.

Index

Click an index number to modify a static MAC address rule for a port.

Active

This field displays whether this static MAC address forwarding rule is active
(Yes) or not (No). You may temporarily deactivate a rule without deleting
it.

Name

This field displays the descriptive name for identification purposes for this
static MAC address-forwarding rule.

MAC Address This field displays the MAC address that will be forwarded and the VLAN
identification number to which the MAC address belongs.
VID

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This field displays the ID number of the VLAN group.

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Table 22 Advanced Application > Static MAC Forwarding (continued)
LABEL

DESCRIPTION

Port

This field displays the port where the MAC address shown in the next field
will be forwarded.

Delete

Click Delete to remove the selected entry from the summary table.

Cancel

Click Cancel to clear the Delete check boxes.

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11

Static Multicast Forward Setup
Use these screens to configure static multicast address forwarding.

11.1 Static Multicast Forwarding Overview
A multicast MAC address is the MAC address of a member of a multicast group. A
static multicast address is a multicast MAC address that has been manually
entered in the multicast table. Static multicast addresses do not age out. Static
multicast forwarding allows you (the administrator) to forward multicast frames to
a member without the member having to join the group first.
If a multicast group has no members, then the switch will either flood the
multicast frames to all ports or drop them. You can configure this in the
Advanced Application > Multicast > Multicast Setting screen (see Section
24.3 on page 201). Figure 58 shows such unknown multicast frames flooded to all
ports. With static multicast forwarding, you can forward these multicasts to
port(s) within a VLAN group. Figure 59 shows frames being forwarded to devices

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connected to port 3. Figure 60 shows frames being forwarded to ports 2 and 3
within VLAN group 4.

Figure 58 No Static Multicast Forwarding

Figure 59 Static Multicast Forwarding to A Single Port

Figure 60 Static Multicast Forwarding to Multiple Ports

11.2 Configuring Static Multicast Forwarding
Use this screen to configure rules to forward specific multicast frames, such as
streaming or control frames, to specific port(s).

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Click Advanced Application > Static Multicast Forwarding to display the
configuration screen as shown.

Figure 61 Advanced Application > Static Multicast Forwarding

The following table describes the labels in this screen.

Table 23 Advanced Application > Static Multicast Forwarding
LABEL

DESCRIPTION

Active

Select this check box to activate your rule. You may temporarily deactivate
a rule without deleting it by clearing this check box.

Name

Type a descriptive name (up to 32 printable ASCII characters) for this
static multicast MAC address forwarding rule. This is for identification only.

MAC Address Enter a multicast MAC address which identifies the multicast group. The
last binary bit of the first octet pair in a multicast MAC address must be 1.
For example, the first octet pair 00000001 is 01 and 00000011 is 03 in
hexadecimal, so 01:00:5e:00:00:0A and 03:00:5e:00:00:27 are valid
multicast MAC addresses.
VID

You can forward frames with matching destination MAC address to port(s)
within a VLAN group. Enter the ID that identifies the VLAN group here. If
you don’t have a specific target VLAN, enter 1.

Port

Enter the port(s) where frames with destination MAC address that matched
the entry above are forwarded. You can enter multiple ports separated by
(no space) comma (,) or hyphen (-). For example, enter “3-5” for ports 3,
4, and 5. Enter “3,5,7” for ports 3, 5, and 7.

Add

Click Add to save your rule to the Switch’s run-time memory. The Switch
loses this rule if it is turned off or loses power, so use the Save link on the
top navigation panel to save your changes to the non-volatile memory
when you are done configuring.

Cancel

Click Cancel to reset the fields to their last saved values.

Clear

Click Clear to begin configuring this screen afresh.

Index

Click an index number to modify a static multicast MAC address rule for
port(s).

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Table 23 Advanced Application > Static Multicast Forwarding (continued)
LABEL

DESCRIPTION

Active

This field displays whether a static multicast MAC address forwarding rule
is active (Yes) or not (No). You may temporarily deactivate a rule without
deleting it.

Name

This field displays the descriptive name for identification purposes for a
static multicast MAC address-forwarding rule.

MAC Address This field displays the multicast MAC address that identifies a multicast
group.

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VID

This field displays the ID number of a VLAN group to which frames
containing the specified multicast MAC address will be forwarded.

Port

This field displays the port(s) within a identified VLAN group to which
frames containing the specified multicast MAC address will be forwarded.

Delete

Click Delete to remove the selected entry from the summary table.

Cancel

Click Cancel to clear the Delete check boxes.

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12
Filtering

This chapter discusses MAC address port filtering.

12.1 Configure a Filtering Rule
Configure the Switch to filter traffic based on the traffic’s source, destination MAC
addresses and/or VLAN group (ID).
Click Advanced Application > Filtering in the navigation panel to display the
screen as shown next.

Figure 62 Advanced Application > Filtering

The following table describes the related labels in this screen.

Table 24 Advanced Application > FIltering
LABEL

DESCRIPTION

Active

Make sure to select this check box to activate your rule. You may
temporarily deactivate a rule without deleting it by deselecting this check
box.

Name

Type a descriptive name (up to 32 printable ASCII characters) for this rule.
This is for identification only.

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Table 24 Advanced Application > FIltering (continued)
LABEL

DESCRIPTION

Action

Select Discard source to drop frames from the source MAC address
(specified in the MAC field). The Switch can still send frames to the MAC
address.
Select Discard destination to drop frames to the destination MAC address
(specified in the MAC address). The Switch can still receive frames
originating from the MAC address.
Select Discard source and Discard destination to block traffic to/from
the MAC address specified in the MAC field.

124

MAC

Type a MAC address in a valid MAC address format, that is, six hexadecimal
character pairs.

VID

Type the VLAN group identification number.

Add

Click Add to save your changes to the Switch’s run-time memory. The
Switch loses these changes if it is turned off or loses power, so use the Save
link on the top navigation panel to save your changes to the non-volatile
memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

Clear

Click Clear to clear the fields to the factory defaults.

Index

This field displays the index number of the rule. Click an index number to
change the settings.

Active

This field displays Yes when the rule is activated and No when is it
deactivated.

Name

This field displays the descriptive name for this rule. This is for identification
purposes only.

MAC
Address

This field displays the source/destination MAC address with the VLAN
identification number to which the MAC address belongs.

VID

This field displays the VLAN group identification number.

Delete

Check the rule(s) that you want to remove in the Delete column and then
click the Delete button.

Cancel

Click Cancel to clear the selected checkbox(es) in the Delete column.

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13

Spanning Tree Protocol
The Switch supports Spanning Tree Protocol (STP), Rapid Spanning Tree Protocol
(RSTP) and Multiple Spanning Tree Protocol (MSTP) as defined in the following
standards.
• IEEE 802.1D Spanning Tree Protocol
• IEEE 802.1w Rapid Spanning Tree Protocol
• IEEE 802.1s Multiple Spanning Tree Protocol
The Switch also allows you to set up multiple STP configurations (or trees). Ports
can then be assigned to the trees.

13.1 STP/RSTP Overview
(R)STP detects and breaks network loops and provides backup links between
switches, bridges or routers. It allows a Switch to interact with other (R)STPcompliant switches in your network to ensure that only one path exists between
any two stations on the network.
The Switch uses IEEE 802.1w RSTP (Rapid Spanning Tree Protocol) that allows
faster convergence of the spanning tree than STP (while also being backwards
compatible with STP-only aware bridges). In RSTP, topology change information is
directly propagated throughout the network from the device that generates the
topology change. In STP, a longer delay is required as the device that causes a
topology change first notifies the root bridge and then the root bridge notifies the
network. Both RSTP and STP flush unwanted learned addresses from the filtering
database. In RSTP, the port states are Discarding, Learning, and Forwarding.

Note: In this user’s guide, “STP” refers to both STP and RSTP.

13.1.1 STP Terminology
The root bridge is the base of the spanning tree.

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Path cost is the cost of transmitting a frame onto a LAN through that port. The
recommended cost is assigned according to the speed of the link to which a port is
attached. The slower the media, the higher the cost.

Table 25 STP Path Costs
LINK SPEED

RECOMMENDED
VALUE

RECOMMENDED
RANGE

ALLOWED
RANGE

Path Cost

4Mbps

250

100 to 1000

1 to 65535

Path Cost

10Mbps

100

50 to 600

1 to 65535

Path Cost

16Mbps

62

40 to 400

1 to 65535

Path Cost

100Mbps

19

10 to 60

1 to 65535

Path Cost

1Gbps

4

3 to 10

1 to 65535

Path Cost

10Gbps

2

1 to 5

1 to 65535

On each bridge, the bridge communicates with the root through the root port. The
root port is the port on this Switch with the lowest path cost to the root (the root
path cost). If there is no root port, then this Switch has been accepted as the root
bridge of the spanning tree network.
For each LAN segment, a designated bridge is selected. This bridge has the lowest
cost to the root among the bridges connected to the LAN.

13.1.2 How STP Works
After a bridge determines the lowest cost-spanning tree with STP, it enables the
root port and the ports that are the designated ports for connected LANs, and
disables all other ports that participate in STP. Network packets are therefore only
forwarded between enabled ports, eliminating any possible network loops.
STP-aware switches exchange Bridge Protocol Data Units (BPDUs) periodically.
When the bridged LAN topology changes, a new spanning tree is constructed.
Once a stable network topology has been established, all bridges listen for Hello
BPDUs (Bridge Protocol Data Units) transmitted from the root bridge. If a bridge
does not get a Hello BPDU after a predefined interval (Max Age), the bridge
assumes that the link to the root bridge is down. This bridge then initiates
negotiations with other bridges to reconfigure the network to re-establish a valid
network topology.

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13.1.3 STP Port States
STP assigns five port states to eliminate packet looping. A bridge port is not
allowed to go directly from blocking state to forwarding state so as to eliminate
transient loops.

Table 26 STP Port States
PORT
STATE

DESCRIPTION

Disabled

STP is disabled (default).

Blocking

Only configuration and management BPDUs are received and processed.

Listening

All BPDUs are received and processed.

Note: The listening state does not exist in RSTP.
Learning

All BPDUs are received and processed. Information frames are submitted
to the learning process but not forwarded.

Forwarding

All BPDUs are received and processed. All information frames are received
and forwarded.

13.1.4 Multiple RSTP
MRSTP (Multiple RSTP) is ZyXEL’s proprietary feature that is compatible with RSTP
and STP. With MRSTP, you can have more than one spanning tree on your Switch
and assign port(s) to each tree. Each spanning tree operates independently with
its own bridge information.
In the following example, there are two RSTP instances (MRSTP 1 and MRSTP2)
on switch A.

Figure 63 MRSTP Network Example

To set up MRSTP, activate MRSTP on the Switch and specify which port(s) belong
to which spanning tree.

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Note: Each port can belong to one STP tree only.

13.1.5 Multiple STP
Multiple Spanning Tree Protocol (IEEE 802.1s) is backwards compatible with STP/
RSTP and addresses the limitations of existing spanning tree protocols (STP and
RSTP) in networks to include the following features:
• One Common and Internal Spanning Tree (CIST) that represents the entire
network’s connectivity.
• Grouping of multiple bridges (or switching devices) into regions that appear as
one single bridge on the network.
• A VLAN can be mapped to a specific Multiple Spanning Tree Instance (MSTI).
MSTI allows multiple VLANs to use the same spanning tree.
• Load-balancing is possible as traffic from different VLANs can use distinct paths
in a region.

13.1.5.1 MSTP Network Example
The following figure shows a network example where two VLANs are configured on
the two switches. If the switches are using STP or RSTP, the link for VLAN 2 will be
blocked as STP and RSTP allow only one link in the network and block the
redundant link.

Figure 64 STP/RSTP Network Example

A

VLAN 1

VLAN 2

B

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With MSTP, VLANs 1 and 2 are mapped to different spanning trees in the network.
Thus traffic from the two VLANs travel on different paths. The following figure
shows the network example using MSTP.

Figure 65 MSTP Network Example

A

VLAN 1

VLAN 2

B

13.1.5.2 MST Region
An MST region is a logical grouping of multiple network devices that appears as a
single device to the rest of the network. Each MSTP-enabled device can only
belong to one MST region. When BPDUs enter an MST region, external path cost
(of paths outside this region) is increased by one. Internal path cost (of paths
within this region) is increased by one when BPDUs traverse the region.
Devices that belong to the same MST region are configured to have the same
MSTP configuration identification settings. These include the following parameters:
• Name of the MST region
• Revision level as the unique number for the MST region
• VLAN-to-MST Instance mapping

13.1.5.3 MST Instance
An MST Instance (MSTI) is a spanning tree instance. VLANs can be configured to
run on a specific MSTI. Each created MSTI is identified by a unique number
(known as an MST ID) known internally to a region. Thus an MSTI does not span
across MST regions.

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The following figure shows an example where there are two MST regions. Regions
1 and 2 have 2 spanning tree instances.

Figure 66 MSTIs in Different Regions

13.1.5.4 Common and Internal Spanning Tree (CIST)
A CIST represents the connectivity of the entire network and it is equivalent to a
spanning tree in an STP/RSTP. The CIST is the default MST instance (MSTID 0).
Any VLANs that are not members of an MST instance are members of the CIST. In
an MSTP-enabled network, there is only one CIST that runs between MST regions
and single spanning tree devices. A network may contain multiple MST regions
and other network segments running RSTP.

Figure 67 MSTP and Legacy RSTP Network Example

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13.2 Spanning Tree Protocol Status Screen
The Spanning Tree Protocol status screen changes depending on what standard
you choose to implement on your network. Click Advanced Application >
Spanning Tree Protocol to see the screen as shown.

Figure 68 Advanced Application > Spanning Tree Protocol

This screen differs depending on which STP mode (RSTP, MRSTP or MSTP) you
configure on the Switch. This screen is described in detail in the section that
follows the configuration section for each STP mode. Click Configuration to
activate one of the STP standards on the Switch.

13.3 Spanning Tree Configuration
Use the Spanning Tree Configuration screen to activate one of the STP modes
on the Switch. Click Configuration in the Advanced Application > Spanning
Tree Protocol.

Figure 69 Advanced Application > Spanning Tree Protocol > Configuration

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The following table describes the labels in this screen.

Table 27 Advanced Application > Spanning Tree Protocol > Configuration
LABEL

DESCRIPTION

Spanning Tree
Mode

You can activate one of the STP modes on the Switch.
Select Rapid Spanning Tree, Multiple Rapid Spanning Tree or
Multiple Spanning Tree. See Section 13.1 on page 125 for
background information on STP.

Apply

Click Apply to save your changes to the Switch’s run-time memory. The
Switch loses these changes if it is turned off or loses power, so use the
Save link on the top navigation panel to save your changes to the nonvolatile memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

13.4 Configure Rapid Spanning Tree Protocol
Use this screen to configure RSTP settings, see Section 13.1 on page 125 for more
information on RSTP. Click RSTP in the Advanced Application > Spanning
Tree Protocol screen.

Figure 70 Advanced Application > Spanning Tree Protocol > RSTP

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The following table describes the labels in this screen.

Table 28 Advanced Application > Spanning Tree Protocol > RSTP
LABEL

DESCRIPTION

Status

Click Status to display the RSTP Status screen (see Figure 71 on page
134).

Active

Select this check box to activate RSTP. Clear this checkbox to disable
RSTP.

Note: You must also activate Rapid Spanning Tree in the
Advanced Application > Spanning Tree Protocol >
Configuration screen to enable RSTP on the Switch.
Bridge Priority

Bridge priority is used in determining the root switch, root port and
designated port. The switch with the highest priority (lowest numeric
value) becomes the STP root switch. If all switches have the same
priority, the switch with the lowest MAC address will then become the
root switch. Select a value from the drop-down list box.
The lower the numeric value you assign, the higher the priority for this
bridge.
Bridge Priority determines the root bridge, which in turn determines
Hello Time, Max Age and Forwarding Delay.

Hello Time

This is the time interval in seconds between BPDU (Bridge Protocol Data
Units) configuration message generations by the root switch. The
allowed range is 1 to 10 seconds.

Max Age

This is the maximum time (in seconds) a switch can wait without
receiving a BPDU before attempting to reconfigure. All switch ports
(except for designated ports) should receive BPDUs at regular intervals.
Any port that ages out STP information (provided in the last BPDU)
becomes the designated port for the attached LAN. If it is a root port, a
new root port is selected from among the switch ports attached to the
network. The allowed range is 6 to 40 seconds.

Forwarding
Delay

This is the maximum time (in seconds) a switch will wait before
changing states. This delay is required because every switch must
receive information about topology changes before it starts to forward
frames. In addition, each port needs time to listen for conflicting
information that would make it return to a blocking state; otherwise,
temporary data loops might result. The allowed range is 4 to 30
seconds.
As a general rule:

Note: 2 * (Forward Delay - 1) >= Max Age >= 2 * (Hello Time + 1)
Port

This field displays the port number.

*

Settings in this row apply to all ports.
Use this row only if you want to make some settings the same for all
ports. Use this row first to set the common settings and then make
adjustments on a port-by-port basis.

Note: Changes in this row are copied to all the ports as soon as you
make them.

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Table 28 Advanced Application > Spanning Tree Protocol > RSTP (continued)
LABEL

DESCRIPTION

Active

Select this check box to activate RSTP on this port.

Priority

Configure the priority for each port here.
Priority decides which port should be disabled when more than one port
forms a loop in a switch. Ports with a higher priority numeric value are
disabled first. The allowed range is between 0 and 255 and the default
value is 128.

Path Cost

Path cost is the cost of transmitting a frame on to a LAN through that
port. It is recommended to assign this value according to the speed of
the bridge. The slower the media, the higher the cost - see Table 25 on
page 126 for more information.

Apply

Click Apply to save your changes to the Switch’s run-time memory. The
Switch loses these changes if it is turned off or loses power, so use the
Save link on the top navigation panel to save your changes to the nonvolatile memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

13.5 Rapid Spanning Tree Protocol Status
Click Advanced Application > Spanning Tree Protocol in the navigation panel
to display the status screen as shown next. See Section 13.1 on page 125 for
more information on RSTP.

Note: This screen is only available after you activate RSTP on the Switch.
Figure 71 Advanced Application > Spanning Tree Protocol > Status: RSTP

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The following table describes the labels in this screen.

Table 29 Advanced Application > Spanning Tree Protocol > Status: RSTP
LABEL

DESCRIPTION

Configuration

Click Configuration to specify which STP mode you want to activate.
Click RSTP to edit RSTP settings on the Switch.

Bridge

Root refers to the base of the spanning tree (the root bridge). Our
Bridge is this Switch. This Switch may also be the root bridge.

Bridge ID

This is the unique identifier for this bridge, consisting of the bridge
priority plus the MAC address. This ID is the same for Root and Our
Bridge if the Switch is the root switch.

Hello Time
(second)

This is the time interval (in seconds) at which the root switch transmits
a configuration message. The root bridge determines Hello Time, Max
Age and Forwarding Delay.

Max Age
(second)

This is the maximum time (in seconds) a switch can wait without
receiving a configuration message before attempting to reconfigure.

Forwarding
Delay (second)

This is the time (in seconds) the root switch will wait before changing
states (that is, listening to learning to forwarding). See Section 13.1.3
on page 127 for information on port states.

Note: The listening state does not exist in RSTP.
Cost to Bridge

This is the path cost from the root port on this Switch to the root
switch.

Port ID

This is the priority and number of the port on the Switch through which
this Switch must communicate with the root of the Spanning Tree.

Topology
Changed Times

This is the number of times the spanning tree has been reconfigured.

Time Since Last
Change

This is the time since the spanning tree was last reconfigured.

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13.6 Configure Multiple Rapid Spanning Tree
Protocol
To configure MRSTP, click MRSTP in the Advanced Application > Spanning
Tree Protocol screen. See Section 13.1 on page 125 for more information on
MRSTP.

Figure 72 Advanced Application > Spanning Tree Protocol > MRSTP

The following table describes the labels in this screen.

Table 30 Advanced Application > Spanning Tree Protocol > MRSTP
LABEL

DESCRIPTION

Status

Click Status to display the MRSTP Status screen (see Figure 71 on
page 134).

Tree

This is a read only index number of the STP trees.

Active

Select this check box to activate an STP tree. Clear this checkbox to
disable an STP tree.

Note: You must also activate Multiple Rapid Spanning Tree in the
Advanced Application > Spanning Tree Protocol >
Configuration screen to enable MRSTP on the Switch.

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Table 30 Advanced Application > Spanning Tree Protocol > MRSTP (continued)
LABEL

DESCRIPTION

Bridge Priority

Bridge priority is used in determining the root switch, root port and
designated port. The switch with the highest priority (lowest numeric
value) becomes the STP root switch. If all switches have the same
priority, the switch with the lowest MAC address will then become the
root switch. Select a value from the drop-down list box.
The lower the numeric value you assign, the higher the priority for this
bridge.
Bridge Priority determines the root bridge, which in turn determines
Hello Time, Max Age and Forwarding Delay.

Hello Time

This is the time interval in seconds between BPDU (Bridge Protocol Data
Units) configuration message generations by the root switch. The
allowed range is 1 to 10 seconds.

Max Age

This is the maximum time (in seconds) a switch can wait without
receiving a BPDU before attempting to reconfigure. All switch ports
(except for designated ports) should receive BPDUs at regular intervals.
Any port that ages out STP information (provided in the last BPDU)
becomes the designated port for the attached LAN. If it is a root port, a
new root port is selected from among the Switch ports attached to the
network. The allowed range is 6 to 40 seconds.

Forwarding
Delay

This is the maximum time (in seconds) a switch will wait before
changing states. This delay is required because every switch must
receive information about topology changes before it starts to forward
frames. In addition, each port needs time to listen for conflicting
information that would make it return to a blocking state; otherwise,
temporary data loops might result. The allowed range is 4 to 30
seconds.
As a general rule:

Note: 2 * (Forward Delay - 1) >= Max Age >= 2 * (Hello Time + 1)
Port

This field displays the port number.

*

Settings in this row apply to all ports.
Use this row only if you want to make some settings the same for all
ports. Use this row first to set the common settings and then make
adjustments on a port-by-port basis.

Note: Changes in this row are copied to all the ports as soon as you
make them.
Active

Select this check box to activate STP on this port.

Priority

Configure the priority for each port here.
Priority decides which port should be disabled when more than one port
forms a loop in the Switch. Ports with a higher priority numeric value
are disabled first. The allowed range is between 0 and 255 and the
default value is 128.

Path Cost

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Path cost is the cost of transmitting a frame on to a LAN through that
port. It is recommended that you assign this value according to the
speed of the bridge. The slower the media, the higher the cost - see
Table 25 on page 126 for more information.

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Table 30 Advanced Application > Spanning Tree Protocol > MRSTP (continued)
LABEL

DESCRIPTION

Tree

Select which STP tree configuration this port should participate in.

Apply

Click Apply to save your changes to the Switch’s run-time memory. The
Switch loses these changes if it is turned off or loses power, so use the
Save link on the top navigation panel to save your changes to the nonvolatile memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

13.7 Multiple Rapid Spanning Tree Protocol
Status
Click Advanced Application > Spanning Tree Protocol in the navigation panel
to display the status screen as shown next. See Section 13.1 on page 125 for
more information on MRSTP.

Note: This screen is only available after you activate MRSTP on the Switch.
Figure 73 Advanced Application > Spanning Tree Protocol > Status: MRSTP

The following table describes the labels in this screen.

Table 31 Advanced Application > Spanning Tree Protocol > Status: MRSTP

138

LABEL

DESCRIPTION

Configuration

Click Configuration to specify which STP mode you want to activate.
Click MRSTP to edit MRSTP settings on the Switch.

Tree

Select which STP tree configuration you want to view.

Bridge

Root refers to the base of the spanning tree (the root bridge). Our
Bridge is this Switch. This Switch may also be the root bridge.

Bridge ID

This is the unique identifier for this bridge, consisting of bridge priority
plus MAC address. This ID is the same for Root and Our Bridge if the
Switch is the root switch.

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Table 31 Advanced Application > Spanning Tree Protocol > Status: MRSTP
LABEL

DESCRIPTION

Hello Time
(second)

This is the time interval (in seconds) at which the root switch transmits
a configuration message. The root bridge determines Hello Time, Max
Age and Forwarding Delay.

Max Age
(second)

This is the maximum time (in seconds) a switch can wait without
receiving a configuration message before attempting to reconfigure.

Forwarding
Delay (second)

This is the time (in seconds) the root switch will wait before changing
states (that is, listening to learning to forwarding).

Note: The listening state does not exist in RSTP.
Cost to Bridge

This is the path cost from the root port on this Switch to the root
switch.

Port ID

This is the priority and number of the port on the Switch through which
this Switch must communicate with the root of the Spanning Tree.

Topology
Changed Times

This is the number of times the spanning tree has been reconfigured.

Time Since Last
Change

This is the time since the spanning tree was last reconfigured.

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13.8 Configure Multiple Spanning Tree Protocol
To configure MSTP, click MSTP in the Advanced Application > Spanning Tree
Protocol screen. See Section 13.1.5 on page 128 for more information on MSTP.

Figure 74 Advanced Application > Spanning Tree Protocol > MSTP

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The following table describes the labels in this screen.

Table 32 Advanced Application > Spanning Tree Protocol > MSTP
LABEL

DESCRIPTION

Status

Click Status to display the MSTP Status screen (see Figure 75 on page
143).

Active

Select this check box to activate MSTP on the Switch. Clear this
checkbox to disable MSTP on the Switch.

Note: You must also activate Multiple Spanning Tree in the
Advanced Application > Spanning Tree Protocol >
Configuration screen to enable MSTP on the Switch.
Hello Time

This is the time interval in seconds between BPDU (Bridge Protocol Data
Units) configuration message generations by the root switch. The
allowed range is 1 to 10 seconds.

MaxAge

This is the maximum time (in seconds) a switch can wait without
receiving a BPDU before attempting to reconfigure. All switch ports
(except for designated ports) should receive BPDUs at regular intervals.
Any port that ages out STP information (provided in the last BPDU)
becomes the designated port for the attached LAN. If it is a root port, a
new root port is selected from among the Switch ports attached to the
network. The allowed range is 6 to 40 seconds.

Forwarding
Delay

This is the maximum time (in seconds) a switch will wait before
changing states. This delay is required because every switch must
receive information about topology changes before it starts to forward
frames. In addition, each port needs time to listen for conflicting
information that would make it return to a blocking state; otherwise,
temporary data loops might result. The allowed range is 4 to 30
seconds. As a general rule:

Note: 2 * (Forward Delay - 1) >= Max Age >= 2 * (Hello Time + 1)
Maximum hops

Enter the number of hops (between 1 and 255) in an MSTP region
before the BPDU is discarded and the port information is aged.

Configuration
Name

Enter a descriptive name (up to 32 characters) of an MST region.

Revision
Number

Enter a number to identify a region’s configuration. Devices must have
the same revision number to belong to the same region.

Apply

Click Apply to save your changes to the Switch’s run-time memory. The
Switch loses these changes if it is turned off or loses power, so use the
Save link on the top navigation panel to save your changes to the nonvolatile memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

Instance

Use this section to configure MSTI (Multiple Spanning Tree Instance)
settings.

Instance

Enter the number you want to use to identify this MST instance on the
Switch. The Switch supports instance numbers 0-16.

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Table 32 Advanced Application > Spanning Tree Protocol > MSTP (continued)
LABEL

DESCRIPTION

Bridge Priority

Set the priority of the Switch for the specific spanning tree instance. The
lower the number, the more likely the Switch will be chosen as the root
bridge within the spanning tree instance.
Enter priority values between 0 and 61440 in increments of 4096 (thus
valid values are 4096, 8192, 12288, 16384, 20480, 24576, 28672,
32768, 36864, 40960, 45056, 49152, 53248, 57344 and 61440).

VLAN Range

Enter the start of the VLAN ID range that you want to add or remove
from the VLAN range edit area in the Start field. Enter the end of the
VLAN ID range that you want to add or remove from the VLAN range
edit area in the End field.
Next click:
•
•
•

Add - to add this range of VLAN(s) to be mapped to the MST
instance.
Remove - to remove this range of VLAN(s) from being mapped to
the MST instance.
Clear - to remove all VLAN(s) from being mapped to this MST
instance.

Enabled
VLAN(s)

This field displays which VLAN(s) are mapped to this MST instance.

Port

This field displays the port number.

*

Settings in this row apply to all ports.
Use this row only if you want to make some settings the same for all
ports. Use this row first to set the common settings and then make
adjustments on a port-by-port basis.

Note: Changes in this row are copied to all the ports as soon as you
make them.
Active

Select this check box to add this port to the MST instance.

Priority

Configure the priority for each port here.
Priority decides which port should be disabled when more than one port
forms a loop in the Switch. Ports with a higher priority numeric value
are disabled first. The allowed range is between 0 and 255 and the
default value is 128.

142

Path Cost

Path cost is the cost of transmitting a frame on to a LAN through that
port. It is recommended to assign this value according to the speed of
the bridge. The slower the media, the higher the cost - see Table 25 on
page 126 for more information.

Add

Click Add to save this MST instance to the Switch’s run-time memory.
The Switch loses this change if it is turned off or loses power, so use the
Save link on the top navigation panel to save your changes to the nonvolatile memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

Instance

This field displays the ID of an MST instance.

VLAN

This field displays the VID (or VID ranges) to which the MST instance is
mapped.

Active Port

This field display the ports configured to participate in the MST instance.

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Table 32 Advanced Application > Spanning Tree Protocol > MSTP (continued)
LABEL

DESCRIPTION

Delete

Check the rule(s) that you want to remove in the Delete column and
then click the Delete button.

Cancel

Click Cancel to begin configuring this screen afresh.

13.9 Multiple Spanning Tree Protocol Status
Click Advanced Application > Spanning Tree Protocol in the navigation panel
to display the status screen as shown next. See Section 13.1.5 on page 128 for
more information on MSTP.

Note: This screen is only available after you activate MSTP on the Switch.
Figure 75 Advanced Application > Spanning Tree Protocol > Status: MSTP

The following table describes the labels in this screen.

Table 33 Advanced Application > Spanning Tree Protocol > Status: MSTP
LABEL

DESCRIPTION

Configuration

Click Configuration to specify which STP mode you want to activate.
Click MSTP to edit MSTP settings on the Switch.

CST

This section describes the Common Spanning Tree settings.

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Table 33 Advanced Application > Spanning Tree Protocol > Status: MSTP
LABEL

DESCRIPTION

Bridge

Root refers to the base of the spanning tree (the root bridge). Our
Bridge is this Switch. This Switch may also be the root bridge.

Bridge ID

This is the unique identifier for this bridge, consisting of bridge priority
plus MAC address. This ID is the same for Root and Our Bridge if the
Switch is the root switch.

Hello Time
(second)

This is the time interval (in seconds) at which the root switch transmits
a configuration message.

Max Age
(second)

This is the maximum time (in seconds) a switch can wait without
receiving a configuration message before attempting to reconfigure.

Forwarding
Delay (second)

This is the time (in seconds) the root switch will wait before changing
states (that is, listening to learning to forwarding).

Cost to Bridge

This is the path cost from the root port on this Switch to the root
switch.

Port ID

This is the priority and number of the port on the Switch through which
this Switch must communicate with the root of the Spanning Tree.

Configuration
Name

This field displays the configuration name for this MST region.

Revision
Number

This field displays the revision number for this MST region.

Configuration
Digest

A configuration digest is generated from the VLAN-MSTI mapping
information.
This field displays the 16-octet signature that is included in an MSTP
BPDU. This field displays the digest when MSTP is activated on the
system.

144

Topology
Changed Times

This is the number of times the spanning tree has been reconfigured.

Time Since Last
Change

This is the time since the spanning tree was last reconfigured.

Instance:

These fields display the MSTI to VLAN mapping. In other words, which
VLANs run on each spanning tree instance.

Instance

This field displays the MSTI ID.

VLAN

This field displays which VLANs are mapped to an MSTI.

MSTI

Select the MST instance settings you want to view.

Bridge

Root refers to the base of the MST instance. Our Bridge is this Switch.
This Switch may also be the root bridge.

Bridge ID

This is the unique identifier for this bridge, consisting of bridge priority
plus MAC address. This ID is the same for Root and Our Bridge if the
Switch is the root switch.

Internal Cost

This is the path cost from the root port in this MST instance to the
regional root switch.

Port ID

This is the priority and number of the port on the Switch through which
this Switch must communicate with the root of the MST instance.

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14

Bandwidth Control
This chapter shows you how you can cap the maximum bandwidth using the
Bandwidth Control screen.

14.1 Bandwidth Control Overview
Bandwidth control means defining a maximum allowable bandwidth for incoming
and/or out-going traffic flows on a port.

14.1.1 CIR and PIR
The Committed Information Rate (CIR) is the guaranteed bandwidth for the
incoming traffic flow on a port. The Peak Information Rate (PIR) is the maximum
bandwidth allowed for the incoming traffic flow on a port when there is no network
congestion.
The CIR and PIR should be set for all ports that use the same uplink bandwidth. If
the CIR is reached, packets are sent at the rate up to the PIR. When network
congestion occurs, packets through the ingress port exceeding the CIR will be
marked for drop.

Note: The CIR should be less than the PIR.
Note: The sum of CIRs cannot be greater than or equal to the uplink bandwidth.

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14.2 Bandwidth Control Setup
Click Advanced Application > Bandwidth Control in the navigation panel to
bring up the screen as shown next.

Figure 76 Advanced Application > Bandwidth Control

The following table describes the related labels in this screen.

Table 34 Advanced Application > Bandwidth Control
LABEL

DESCRIPTION

Active

Select this check box to enable bandwidth control on the Switch.

Port

This field displays the port number.

*

Settings in this row apply to all ports.
Use this row only if you want to make some settings the same for all ports.
Use this row first to set the common settings and then make adjustments
on a port-by-port basis.

Note: Changes in this row are copied to all the ports as soon as you
make them.
Ingress Rate

146

Active

Select this check box to activate commit rate limits on this port.

Commit
Rate

Specify the guaranteed bandwidth allowed in kilobits per second (Kbps) for
the incoming traffic flow on a port. The commit rate should be less than the
peak rate. The sum of commit rates cannot be greater than or equal to the
uplink bandwidth.

Active

Select this check box to activate peak rate limits on this port.

Peak
Rate

Specify the maximum bandwidth allowed in kilobits per second (Kbps) for
the incoming traffic flow on a port.

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Table 34 Advanced Application > Bandwidth Control (continued)
LABEL

DESCRIPTION

Active

Select this check box to activate egress rate limits on this port.

Egress Rate

Specify the maximum bandwidth allowed in kilobits per second (Kbps) for
the out-going traffic flow on a port.

Apply

Click Apply to save your changes to the Switch’s run-time memory. The
Switch loses these changes if it is turned off or loses power, so use the
Save link on the top navigation panel to save your changes to the nonvolatile memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

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CHAPTER

15

Broadcast Storm Control
This chapter introduces and shows you how to configure the broadcast storm
control feature.

15.1 Broadcast Storm Control Setup
Broadcast storm control limits the number of broadcast, multicast and destination
lookup failure (DLF) packets the Switch receives per second on the ports. When
the maximum number of allowable broadcast, multicast and/or DLF packets is
reached per second, the subsequent packets are discarded. Enable this feature to
reduce broadcast, multicast and/or DLF packets in your network. You can specify
limits for each packet type on each port.
Click Advanced Application > Broadcast Storm Control in the navigation
panel to display the screen as shown next.

Figure 77 Advanced Application > Broadcast Storm Control

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The following table describes the labels in this screen.

Table 35 Advanced Application > Broadcast Storm Control
LABEL

DESCRIPTION

Active

Select this check box to enable traffic storm control on the Switch. Clear
this check box to disable this feature.

Port

This field displays a port number.

*

Settings in this row apply to all ports.
Use this row only if you want to make some settings the same for all
ports. Use this row first to set the common settings and then make
adjustments on a port-by-port basis.

Note: Changes in this row are copied to all the ports as soon as you
make them.

150

Broadcast
(pkt/s)

Select this option and specify how many broadcast packets the port
receives per second.

Multicast (pkt/
s)

Select this option and specify how many multicast packets the port
receives per second.

DLF (pkt/s)

Select this option and specify how many destination lookup failure (DLF)
packets the port receives per second.

Apply

Click Apply to save your changes to the Switch’s run-time memory. The
Switch loses these changes if it is turned off or loses power, so use the
Save link on the top navigation panel to save your changes to the nonvolatile memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

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CHAPTER

16
Mirroring

This chapter discusses port mirroring setup screens.

16.1 Port Mirroring Setup
Port mirroring allows you to copy a traffic flow to a monitor port (the port you copy
the traffic to) in order that you can examine the traffic from the monitor port
without interference.
Click Advanced Application > Mirroring in the navigation panel to display the
Mirroring screen. Use this screen to select a monitor port and specify the traffic
flow to be copied to the monitor port.

Figure 78 Advanced Application > Mirroring

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The following table describes the labels in this screen.

Table 36 Advanced Application > Mirroring
LABEL

DESCRIPTION

Active

Select this check box to activate port mirroring on the Switch. Clear this check
box to disable the feature.

Monitor
Port

The monitor port is the port you copy the traffic to in order to examine it in
more detail without interfering with the traffic flow on the original port(s).
Type the port number of the monitor port.

Port

This field displays the port number.

*

Settings in this row apply to all ports.
Use this row only if you want to make some settings the same for all ports.
Use this row first to set the common settings and then make adjustments on
a port-by-port basis.

Note: Changes in this row are copied to all the ports as soon as you
make them.

152

Mirrored

Select this option to mirror the traffic on a port.

Direction

Specify the direction of the traffic to mirror by selecting from the drop-down
list box. Choices are Egress (outgoing), Ingress (incoming) and Both.

Apply

Click Apply to save your changes to the Switch’s run-time memory. The
Switch loses these changes if it is turned off or loses power, so use the Save
link on the top navigation panel to save your changes to the non-volatile
memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

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CHAPTER

17

Link Aggregation
This chapter shows you how to logically aggregate physical links to form one
logical, higher-bandwidth link.

17.1 Link Aggregation Overview
Link aggregation (trunking) is the grouping of physical ports into one logical
higher-capacity link. You may want to trunk ports if for example, it is cheaper to
use multiple lower-speed links than to under-utilize a high-speed, but more costly,
single-port link.
However, the more ports you aggregate then the fewer available ports you have. A
trunk group is one logical link containing multiple ports.
The beginning port of each trunk group must be physically connected to form a
trunk group.
The Switch supports both static and dynamic link aggregation.

Note: In a properly planned network, it is recommended to implement static link
aggregation only. This ensures increased network stability and control over the
trunk groups on your Switch.
See Section 17.6 on page 160 for a static port trunking example.

17.2 Dynamic Link Aggregation
The Switch adheres to the IEEE 802.3ad standard for static and dynamic (LACP)
port trunking.
The Switch supports the link aggregation IEEE802.3ad standard. This standard
describes the Link Aggregation Control Protocol (LACP), which is a protocol that
dynamically creates and manages trunk groups.

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When you enable LACP link aggregation on a port, the port can automatically
negotiate with the ports at the remote end of a link to establish trunk groups.
LACP also allows port redundancy, that is, if an operational port fails, then one of
the “standby” ports become operational without user intervention. Please note
that:
• You must connect all ports point-to-point to the same Ethernet switch and
configure the ports for LACP trunking.
• LACP only works on full-duplex links.
• All ports in the same trunk group must have the same media type, speed,
duplex mode and flow control settings.
Configure trunk groups or LACP before you connect the Ethernet switch to avoid
causing network topology loops.

17.2.1 Link Aggregation ID
LACP aggregation ID consists of the following information1:

Table 37 Link Aggregation ID: Local Switch
SYSTEM
PRIORITY
0000

MAC ADDRESS

KEY

PORT
PRIORITY

PORT
NUMBER

00-00-00-0000-00

0000

00

0000

PORT
PRIORITY

PORT
NUMBER

00

0000

Table 38 Link Aggregation ID: Peer Switch
SYSTEM
PRIORITY
0000

1.

154

MAC ADDRESS

KEY

00-00-00-00-00- 0000
00

Port Priority and Port Number are 0 as it is the aggregator ID for the trunk group, not the individual port.

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17.3 Link Aggregation Status
Click Advanced Application > Link Aggregation in the navigation panel. The
Link Aggregation Status screen displays by default. See Section 17.1 on page
153 for more information.

Figure 79 Advanced Application > Link Aggregation Status

The following table describes the labels in this screen.

Table 39 Advanced Application > Link Aggregation Status
LABEL

DESCRIPTION

Group ID

This field displays the group ID to identify a trunk group, that is, one
logical link containing multiple ports.

Enabled Port

These are the ports you have configured in the Link Aggregation screen
to be in the trunk group.
The port number(s) displays only when this trunk group is activated and
there is a port belonging to this group.

Synchronized These are the ports that are currently transmitting data as one logical link
Ports
in this trunk group.
Aggregator
ID

Link Aggregator ID consists of the following: system priority, MAC
address, key, port priority and port number. Refer to Section 17.2.1 on
page 154 for more information on this field.
The ID displays only when there is a port belonging to this trunk group
and LACP is also enabled for this group.

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Table 39 Advanced Application > Link Aggregation Status (continued)
LABEL

DESCRIPTION

Criteria

This shows the outgoing traffic distribution algorithm used in this trunk
group. Packets from the same source and/or to the same destination are
sent over the same link within the trunk.
src-mac means the Switch distributes traffic based on the packet’s source
MAC address.
dst-mac means the Switch distributes traffic based on the packet’s
destination MAC address.
src-dst-mac means the Switch distributes traffic based on a combination
of the packet’s source and destination MAC addresses.
src-ip means the Switch distributes traffic based on the packet’s source IP
address.
dst-ip means the Switch distributes traffic based on the packet’s
destination IP address.
src-dst-ip means the Switch distributes traffic based on a combination of
the packet’s source and destination IP addresses.

Status

This field displays how these ports were added to the trunk group. It
displays:
•
•

156

Static - if the ports are configured as static members of a trunk group.
LACP - if the ports are configured to join a trunk group via LACP.

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17.4 Link Aggregation Setting
Click Advanced Application > Link Aggregation > Link Aggregation Setting
to display the screen shown next. See Section 17.1 on page 153 for more
information on link aggregation.

Figure 80 Advanced Application > Link Aggregation > Link Aggregation Setting

The following table describes the labels in this screen.

Table 40 Advanced Application > Link Aggregation > Link Aggregation Setting
LABEL

DESCRIPTION

Link
Aggregation
Setting

This is the only screen you need to configure to enable static link
aggregation.

Group ID

The field identifies the link aggregation group, that is, one logical link
containing multiple ports.

Active

Select this option to activate a trunk group.

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Table 40 Advanced Application > Link Aggregation > Link Aggregation Setting
LABEL

DESCRIPTION

Criteria

Select the outgoing traffic distribution type. Packets from the same source
and/or to the same destination are sent over the same link within the
trunk. By default, the Switch uses the src-dst-mac distribution type. If the
Switch is behind a router, the packet’s destination or source MAC address
will be changed. In this case, set the Switch to distribute traffic based on its
IP address to make sure port trunking can work properly.
Select src-mac to distribute traffic based on the packet’s source MAC
address.
Select dst-mac to distribute traffic based on the packet’s destination MAC
address.
Select src-dst-mac to distribute traffic based on a combination of the
packet’s source and destination MAC addresses.
Select src-ip to distribute traffic based on the packet’s source IP address.
Select dst-ip to distribute traffic based on the packet’s destination IP
address.
Select src-dst-ip to distribute traffic based on a combination of the
packet’s source and destination IP addresses.

Port

This field displays the port number.

Group

Select the trunk group to which a port belongs.

Note: When you enable the port security feature on the Switch and
configure port security settings for a port, you cannot include the
port in an active trunk group.

158

Apply

Click Apply to save your changes to the Switch’s run-time memory. The
Switch loses these changes if it is turned off or loses power, so use the
Save link on the top navigation panel to save your changes to the nonvolatile memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

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17.5 Link Aggregation Control Protocol
Click in the Advanced Application > Link Aggregation > Link Aggregation
Setting > LACP to display the screen shown next. See Section 17.2 on page 153
for more information on dynamic link aggregation.

Figure 81 Advanced Application > Link Aggregation > Link Aggregation Setting >
LACP

The following table describes the labels in this screen.

Table 41 Advanced Application > Link Aggregation > Link Aggregation Setting >
LACP
LABEL
Link
Aggregation
Control
Protocol
Active

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DESCRIPTION

Note: Do not configure this screen unless you want to enable
dynamic link aggregation.
Select this checkbox to enable Link Aggregation Control Protocol (LACP).

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Table 41 Advanced Application > Link Aggregation > Link Aggregation Setting >
LACP (continued)
LABEL

DESCRIPTION

System
Priority

LACP system priority is a number between 1 and 65,535. The switch with
the lowest system priority (and lowest port number if system priority is the
same) becomes the LACP “server”. The LACP “server” controls the
operation of LACP setup. Enter a number to set the priority of an active port
using Link Aggregation Control Protocol (LACP). The smaller the number,
the higher the priority level.

Group ID

The field identifies the link aggregation group, that is, one logical link
containing multiple ports.

LACP Active

Select this option to enable LACP for a trunk.

Port

This field displays the port number.

*

Settings in this row apply to all ports.
Use this row only if you want to make some settings the same for all ports.
Use this row first to set the common settings and then make adjustments
on a port-by-port basis.

Note: Changes in this row are copied to all the ports as soon as you
make them.
LACP
Timeout

Timeout is the time interval between the individual port exchanges of LACP
packets in order to check that the peer port in the trunk group is still up. If
a port does not respond after three tries, then it is deemed to be “down”
and is removed from the trunk. Set a short timeout (one second) for busy
trunked links to ensure that disabled ports are removed from the trunk
group as soon as possible.
Select either 1 second or 30 seconds.

Apply

Click Apply to save your changes to the Switch’s run-time memory. The
Switch loses these changes if it is turned off or loses power, so use the
Save link on the top navigation panel to save your changes to the nonvolatile memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

17.6 Static Trunking Example
This example shows you how to create a static port trunk group for ports 2-5.

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1

Make your physical connections - make sure that the ports that you want to
belong to the trunk group are connected to the same destination. The following
figure shows ports 2-5 on switch A connected to switch B.

Figure 82 Trunking Example - Physical Connections

B
A

2

Configure static trunking - Click Advanced Application > Link Aggregation
> Link Aggregation Setting. In this screen activate trunk group T1, select the
traffic distribution algorithm used by this group and select the ports that should
belong to this group as shown in the figure below. Click Apply when you are done.

Figure 83 Trunking Example - Configuration Screen

EXAMPLE
Your trunk group 1 (T1) configuration is now complete.

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CHAPTER

18

Port Authentication
This chapter describes the IEEE 802.1x and MAC authentication methods.

18.1 Port Authentication Overview
Port authentication is a way to validate access to ports on the Switch to clients
based on an external server (authentication server). The Switch supports the
following methods for port authentication:
• IEEE 802.1x2 - An authentication server validates access to a port based on a
username and password provided by the user.
• MAC - An authentication server validates access to a port based on the MAC
address and password of the client.
Both types of authentication use the RADIUS (Remote Authentication Dial In User
Service, RFC 2138, 2139) protocol to validate users. See Section 25.1.2 on page
216 for more information on configuring your RADIUS server settings.

Note: If you enable IEEE 802.1x authentication and MAC authentication on the same
port, the Switch performs IEEE 802.1x authentication first. If a user fails to
authenticate via the IEEE 802.1x method, then access to the port is denied.

18.1.1 IEEE 802.1x Authentication
The following figure illustrates how a client connecting to a IEEE 802.1x
authentication enabled port goes through a validation process. The Switch
prompts the client for login information in the form of a user name and password.
When the client provides the login credentials, the Switch sends an authentication

2.

At the time of writing, IEEE 802.1x is not supported by all operating systems. See your operating system
documentation. If your operating system does not support 802.1x, then you may need to install 802.1x client
software.

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request to a RADIUS server. The RADIUS server validates whether this client is
allowed access to the port.

Figure 84 IEEE 802.1x Authentication Process

1
New Connection
2
Login Info Request
3
Login Credentials

4
Authentication Request
5

Authentication Reply
Session Granted/Denied

18.1.2 MAC Authentication
MAC authentication works in a very similar way to IEEE 802.1x authentication.
The main difference is that the Switch does not prompt the client for login
credentials. The login credentials are based on the source MAC address of the

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client connecting to a port on the Switch along with a password configured
specifically for MAC authentication on the Switch.

Figure 85 MAC Authentication Process

1
New Connection
2
Authentication Request
3
Authentication Reply
Session Granted/Denied

18.2 Port Authentication Configuration
To enable port authentication, first activate the port authentication method(s) you
want to use (both on the Switch and the port(s)), then configure the RADIUS
server settings in the AAA > Radius Server Setup screen.
To activate a port authentication method, click Advanced Application > Port
Authentication in the navigation panel. Select a port authentication method in
the screen that appears.

Figure 86 Advanced Application > Port Authentication

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18.2.1 Activate IEEE 802.1x Security
Use this screen to activate IEEE 802.1x security. In the Port Authentication
screen click 802.1x to display the configuration screen as shown.

Figure 87 Advanced Application > Port Authentication > 802.1x

The following table describes the labels in this screen.

Table 42 Advanced Application > Port Authentication > 802.1x
LABEL

DESCRIPTION

Active

Select this check box to permit 802.1x authentication on the Switch.

Note: You must first enable 802.1x authentication on the Switch
before configuring it on each port.
Port

This field displays a port number.

*

Settings in this row apply to all ports.
Use this row only if you want to make some settings the same for all
ports. Use this row first to set the common settings and then make
adjustments on a port-by-port basis.

Note: Changes in this row are copied to all the ports as soon as you
make them.

166

Active

Select this checkbox to permit 802.1x authentication on this port. You
must first allow 802.1x authentication on the Switch before configuring it
on each port.

Reauthenticati
on

Specify if a subscriber has to periodically re-enter his or her username
and password to stay connected to the port.

Reauthenticati
on Timer

Specify the length of time required to pass before a client has to re-enter
his or her username and password to stay connected to the port.

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Table 42 Advanced Application > Port Authentication > 802.1x (continued)
LABEL

DESCRIPTION

Apply

Click Apply to save your changes to the Switch’s run-time memory. The
Switch loses these changes if it is turned off or loses power, so use the
Save link on the top navigation panel to save your changes to the nonvolatile memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

18.2.2 Activate MAC Authentication
Use this screen to activate MAC authentication. In the Port Authentication
screen click MAC Authentication to display the configuration screen as shown.

Figure 88 Advanced Application > Port Authentication > MAC Authentication

The following table describes the labels in this screen.

Table 43 Advanced Application > Port Authentication > MAC Authentication
LABEL

DESCRIPTION

Active

Select this check box to permit MAC authentication on the Switch.

Note: You must first enable MAC authentication on the Switch
before configuring it on each port.
Name Prefix

Type the prefix that is appended to all MAC addresses sent to the
RADIUS server for authentication. You can enter up to 32 printable ASCII
characters.
If you leave this field blank, then only the MAC address of the client is
forwarded to the RADIUS server.

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Table 43 Advanced Application > Port Authentication > MAC Authentication
LABEL

DESCRIPTION

Password

Type the password the Switch sends along with the MAC address of a
client for authentication with the RADIUS server. You can enter up to 32
printable ASCII characters.

Timeout

Specify the amount of time before the Switch allows a client MAC
address that fails authentication to try and authenticate again. Maximum
time is 3000 seconds.
When a client fails MAC authentication, its MAC address is learned by the
MAC address table with a status of denied. The timeout period you
specify here is the time the MAC address entry stays in the MAC address
table until it is cleared. If you specify 0 for the timeout value, then this
entry will not be deleted from the MAC address table.

Note: If the Aging Time in the Switch Setup screen is set to a
lower value, then it supersedes this setting. See Section 8.5
on page 84.
Port

This field displays a port number.

*

Use this row to make the setting the same for all ports. Use this row first
and then make adjustments on a port-by-port basis.

Note: Changes in this row are copied to all the ports as soon as you
make them.

168

Active

Select this checkbox to permit MAC authentication on this port. You must
first allow MAC authentication on the Switch before configuring it on
each port.

Apply

Click Apply to save your changes to the Switch’s run-time memory. The
Switch loses these changes if it is turned off or loses power, so use the
Save link on the top navigation panel to save your changes to the nonvolatile memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

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CHAPTER

19
Port Security

This chapter shows you how to set up port security.

19.1 About Port Security
Port security allows only packets with dynamically learned MAC addresses and/or
configured static MAC addresses to pass through a port on the Switch. The Switch
can learn up to 16K MAC addresses in total with no limit on individual ports other
than the sum cannot exceed 16K.
For maximum port security, enable this feature, disable MAC address learning and
configure static MAC address(es) for a port. It is not recommended you disable
port security together with MAC address learning as this will result in many
broadcasts. By default, MAC address learning is still enabled even though the port
security is not activated.

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19.2 Port Security Setup
Click Advanced Application > Port Security in the navigation panel to display
the screen as shown.

Figure 89 Advanced Application > Port Security

The following table describes the labels in this screen.

Table 44 Advanced Application > Port Security
LABEL

DESCRIPTION

Port List

Enter the number of the port(s) (separated by a comma) on which you
want to enable port security and disable MAC address learning. After you
click MAC freeze, all previously learned MAC addresses on the specified
port(s) will become static MAC addresses and display in the Static MAC
Forwarding screen.

MAC freeze

Click MAC freeze to have the Switch automatically select the Active
check boxes and clear the Address Learning check boxes only for the
ports specified in the Port list.

Active

Select this option to enable port security on the Switch.

Port

This field displays a port number.

*

Settings in this row apply to all ports.
Use this row only if you want to make some of the settings the same for
all ports. Use this row first to set the common settings and then make
adjustments on a port-by-port basis.

Note: Changes in this row are copied to all the ports as soon as you
make them.

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Table 44 Advanced Application > Port Security (continued)
LABEL

DESCRIPTION

Active

Select this check box to enable the port security feature on this port. The
Switch forwards packets whose MAC address(es) is in the MAC address
table on this port. Packets with no matching MAC address(es) are
dropped.
Clear this check box to disable the port security feature. The Switch
forwards all packets on this port.

Address
Learning

MAC address learning reduces outgoing broadcast traffic. For MAC
address learning to occur on a port, the port itself must be active with
address learning enabled.

Limited
Number of
Learned MAC
Address

Use this field to limit the number of (dynamic) MAC addresses that may
be learned on a port. For example, if you set this field to "5" on port 2,
then only the devices with these five learned MAC addresses may access
port 2 at any one time. A sixth device must wait until one of the five
learned MAC addresses ages out. MAC address aging out time can be set
in the Switch Setup screen. The valid range is from “0” to “16384”. “0”
means this feature is disabled.

Apply

Click Apply to save your changes to the Switch’s run-time memory. The
Switch loses these changes if it is turned off or loses power, so use the
Save link on the top navigation panel to save your changes to the nonvolatile memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

19.3 VLAN MAC Address Limit
Use this screen to set the MAC address learning limit on per-port and per-VLAN
basis. Click VLAN MAC Address Limit in the Advanced Application > Port
Security screen to display the screen as shown.

Figure 90 Advanced Application > Port Security > VLAN MAC Address Limit

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The following table describes the labels in this screen.

Table 45 Advanced Application > Port Security > VLAN MAC Address Limit

172

LABEL

DESCRIPTION

Active

Select this option to activate this rule.

Port

Enter the number of the port to which this rule is applied.

VID

Enter the VLAN identification number.

Limit Number

Use this field to limit the number of (dynamic) MAC addresses that may
be learned on a port in a specified VLAN. For example, if you set this field
to "5" on port 2, then only the devices with these five learned MAC
addresses may access port 2 at any one time. A sixth device would have
to wait until one of the five learned MAC addresses aged out. MAC
address aging out time can be set in the Switch Setup screen. The valid
range is from “0” to “16384”. “0” means this feature is disabled.

Add

Click Add to save your changes to the Switch’s run-time memory. The
Switch loses these changes if it is turned off or loses power, so use the
Save link on the top navigation panel to save your changes to the nonvolatile memory when you are done configuring.

Cancel

Click Cancel to reset the fields to your previous configuration.

Clear

Click Clear to clear the fields to the factory defaults.

Index

This field displays the index number of the rule. Click an index number to
change the settings.

Active

This field displays Yes when the rule is activated and No when is it
deactivated.

Port

This field displays the number of the port to which this rule is applied.

VID

This is the VLAN ID number to which the port belongs.

Limit Number

This is the maximum number of MAC addresses which a port can learn in
a VLAN.

Delete

Check the rule(s) that you want to remove in the Delete column and then
click the Delete button.

Cancel

Click Cancel to clear the selected checkbox(es) in the Delete column.

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20
Classifier

This chapter introduces and shows you how to configure the packet classifier on
the Switch.

20.1 About the Classifier and QoS
Quality of Service (QoS) refers to both a network's ability to deliver data with
minimum delay, and the networking methods used to control the use of
bandwidth. Without QoS, all traffic data is equally likely to be dropped when the
network is congested. This can cause a reduction in network performance and
make the network inadequate for time-critical application such as video-ondemand.
A classifier groups traffic into data flows according to specific criteria such as the
source address, destination address, source port number, destination port number
or incoming port number. For example, you can configure a classifier to select
traffic from the same protocol port (such as Telnet) to form a flow.
Configure QoS on the Switch to group and prioritize application traffic and finetune network performance. Setting up QoS involves two separate steps:
1

Configure classifiers to sort traffic into different flows.

2

Configure policy rules to define actions to be performed for a classified traffic flow
(refer to Chapter 21 on page 179 to configure policy rules).

20.2 Configuring the Classifier
Use the Classifier screen to define the classifiers. After you define the classifier,
you can specify actions (or policy) to act upon the traffic that matches the rules.
To configure policy rules, refer to Chapter 21 on page 179.

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Click Advanced Application > Classifier in the navigation panel to display the
configuration screen as shown.

Figure 91 Advanced Application > Classifier

The following table describes the labels in this screen.

Table 46 Advanced Application > Classifier
LABEL

DESCRIPTION

Active

Select this option to enable this rule.

Name

Enter a descriptive name for this rule for identifying purposes.

Packet
Format

Specify the format of the packet. Choices are All, 802.3 tagged, 802.3
untagged, Ethernet II tagged and Ethernet II untagged.
A value of 802.3 indicates that the packets are formatted according to the
IEEE 802.3 standards.
A value of Ethernet II indicates that the packets are formatted according to
RFC 894, Ethernet II encapsulation.

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Table 46 Advanced Application > Classifier (continued)
LABEL

DESCRIPTION

Layer 2
Specify the fields below to configure a layer 2 classifier.
VLAN

Select Any to classify traffic from any VLAN or select the second option and
specify the source VLAN ID in the field provided.

Priority

Select Any to classify traffic from any priority level or select the second option
and specify a priority level in the field provided.

Ethernet
Type

Select an Ethernet type or select Other and enter the Ethernet type number in
hexadecimal value. Refer to Table 48 on page 177 for information.

Source
MAC
Address

Port

Select Any to apply the rule to all MAC addresses.
To specify a source, select the second choice and type a MAC address in valid
MAC address format (six hexadecimal character pairs).
Type the port number to which the rule should be applied. You may choose one
port only or all ports (Any).

Destination
MAC
Address

Select Any to apply the rule to all MAC addresses.
To specify a destination, select the second choice and type a MAC address in
valid MAC address format (six hexadecimal character pairs).

Layer 3
Specify the fields below to configure a layer 3 classifier.
DSCP

Select Any to classify traffic from any DSCP or select the second option and
specify a DSCP (DiffServ Code Point) number between 0 and 63 in the field
provided.

IP
Protocol

Select an IP protocol type or select Other and enter the protocol number in
decimal value. Refer to Table 49 on page 177 for more information.
You may select Establish Only for TCP protocol type. This means that the
Switch will pick out the packets that are sent to establish TCP connections.

Source
IP
Address/
Address
Prefix

Enter a source IP address in dotted decimal notation.
Specify the address prefix by entering the number of ones in the subnet mask.

Socket
Number

Note: You must select either UDP or TCP in the IP Protocol field before
you configure the socket numbers.
Select Any to apply the rule to all TCP/UDP protocol port numbers or select
the second option and enter a TCP/UDP protocol port number.

Destination
IP
Address/
Address
Prefix

Enter a destination IP address in dotted decimal notation.
Specify the address prefix by entering the number of ones in the subnet mask.

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Table 46 Advanced Application > Classifier (continued)
LABEL
Socket
Number

DESCRIPTION

Note: You must select either UDP or TCP in the IP Protocol field before
you configure the socket numbers.
Select Any to apply the rule to all TCP/UDP protocol port numbers or select
the second option and enter a TCP/UDP protocol port number.

Add

Click Add to insert the entry in the summary table below and save your
changes to the Switch’s run-time memory. The Switch loses these changes if it
is turned off or loses power, so use the Save link on the top navigation panel
to save your changes to the non-volatile memory when you are done
configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

Clear

Click Clear to set the above fields back to the factory defaults.

20.3 Viewing and Editing Classifier
Configuration
To view a summary of the classifier configuration, scroll down to the summary
table at the bottom of the Classifier screen. To change the settings of a rule, click
a number in the Index field.

Note: When two rules conflict with each other, a higher layer rule has priority over a
lower layer rule.
Figure 92 Advanced Application > Classifier: Summary Table

The following table describes the labels in this screen.

Table 47 Classifier: Summary Table

176

LABEL

DESCRIPTION

Index

This field displays the index number of the rule. Click an index number to edit
the rule.

Active

This field displays Yes when the rule is activated and No when it is
deactivated.

Name

This field displays the descriptive name for this rule. This is for identification
purposes only.

Rule

This field displays a summary of the classifier rule’s settings.

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Table 47 Classifier: Summary Table
LABEL

DESCRIPTION

Delete

Click Delete to remove the selected entry from the summary table.

Cancel

Click Cancel to clear the Delete check boxes.

The following table shows some other common Ethernet types and the
corresponding protocol number.

Table 48 Common Ethernet Types and Protocol Number
ETHERNET TYPE

PROTOCOL NUMBER

IP ETHII

0800

X.75 Internet

0801

NBS Internet

0802

ECMA Internet

0803

Chaosnet

0804

X.25 Level 3

0805

XNS Compat

0807

Banyan Systems

0BAD

BBN Simnet

5208

IBM SNA

80D5

AppleTalk AARP

80F3

Some of the most common IP ports are:

Table 49 Common IP Ports
PORT
NUMBER

PORT NAME

21

FTP

23

Telnet

25

SMTP

53

DNS

80

HTTP

110

POP3

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20.4 Classifier Example
The following screen shows an example of configuring a classifier that identifies all
traffic from MAC address 00:50:ba:ad:4f:81 on port 2.

Figure 93 Classifier: Example

EXAMPLE
After you have configured a classifier, you can configure a policy to define
action(s) on the classified traffic flow. See Chapter 21 on page 179 for information
on configuring a policy rule.

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21
Policy Rule

This chapter shows you how to configure policy rules.

21.1 Policy Rules Overview
A classifier distinguishes traffic into flows based on the configured criteria (refer to
Chapter 20 on page 173 for more information). A policy rule ensures that a traffic
flow gets the requested treatment in the network.

21.1.1 DiffServ
DiffServ (Differentiated Services) is a class of service (CoS) model that marks
packets so that they receive specific per-hop treatment at DiffServ-compliant
network devices along the route based on the application types and traffic flow.
Packets are marked with DiffServ Code Points (DSCPs) indicating the level of
service desired. This allows the intermediary DiffServ-compliant network devices
to handle the packets differently depending on the code points without the need to
negotiate paths or remember state information for every flow. In addition,
applications do not have to request a particular service or give advanced notice of
where the traffic is going.

21.1.2 DSCP and Per-Hop Behavior
DiffServ defines a new DS (Differentiated Services) field to replace the Type of
Service (TOS) field in the IP header. The DS field contains a 2-bit unused field and
a 6-bit DSCP field which can define up to 64 service levels. The following figure
illustrates the DS field.
DSCP is backward compatible with the three precedence bits in the ToS octet so
that non-DiffServ compliant, ToS-enabled network device will not conflict with the
DSCP mapping.
DSCP (6 bits)

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Chapter 21 Policy Rule
The DSCP value determines the forwarding behavior, the PHB (Per-Hop Behavior),
that each packet gets across the DiffServ network. Based on the marking rule,
different kinds of traffic can be marked for different kinds of forwarding. Resources
can then be allocated according to the DSCP values and the configured policies.

21.2 Configuring Policy Rules
You must first configure a classifier in the Classifier screen. Refer to Section 20.2
on page 173 for more information.

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Click Advanced Applications > Policy Rule in the navigation panel to display
the screen as shown.

Figure 94 Advanced Application > Policy Rule

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The following table describes the labels in this screen.

Table 50 Advanced Application > Policy Rule
LABEL

DESCRIPTION

Active

Select this option to enable the policy.

Name

Enter a descriptive name for identification purposes.

Classifier(s)

This field displays the active classifier(s) you configure in the Classifier
screen.
Select the classifier(s) to which this policy rule applies. To select more
than one classifier, press [SHIFT] and select the choices at the same time.

Parameters
Set the fields below for this policy. You only have to set the field(s) that is related to the
action(s) you configure in the Action field.
General
Egress
Port

Type the number of an outgoing port.

Priority

Specify a priority level.

DSCP

Specify a DSCP (DiffServ Code Point) number between 0 and 63.

TOS

Specify the type of service (TOS) priority level.

Metering

You can configure the desired bandwidth available to a traffic flow. Traffic
that exceeds the maximum bandwidth allocated (in cases where the
network is congested) is called out-of-profile traffic.

Bandwidth Specify the bandwidth in kilobit per second (Kbps). Enter a number
between 1 and 1000000.
Out-ofProfile
DSCP

Specify a new DSCP number (between 0 and 63) if you want to replace or
remark the DSCP number for out-of-profile traffic.

Action
Specify the action(s) the Switch takes on the associated classified traffic flow.
Forwarding

Select No change to forward the packets.
Select Discard the packet to drop the packets.
Select Do not drop the matching frame previously marked for
dropping to retain the frames that were marked to be dropped before.

Priority

Select No change to keep the priority setting of the frames.
Select Set the packet’s 802.1 priority to replace the packet’s 802.1
priority field with the value you set in the Priority field.
Select Send the packet to priority queue to put the packets in the
designated queue.
Select Replace the 802.1 priority field with the IP TOS value to
replace the packet’s 802.1 priority field with the value you set in the TOS
field.

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Table 50 Advanced Application > Policy Rule (continued)
LABEL

DESCRIPTION

Diffserv

Select No change to keep the TOS and/or DSCP fields in the packets.
Select Set the packet’s TOS field to set the TOS field with the value you
configure in the TOS field.
Select Replace the IP TOS with the 802.1 priority value to replace
the TOS field with the value you configure in the Priority field.
Select Set the Diffserv Codepoint field in the frame to set the DSCP
field with the value you configure in the DSCP field.

Outgoing

Select Send the packet to the mirror port to send the packet to the
mirror port.
Select Send the packet to the egress port to send the packet to the
egress port.

Metering

Select Enable to activate bandwidth limitation on the traffic flow(s) then
set the actions to be taken on out-of-profile packets.

Out-of-profile
action

Select the action(s) to be performed for out-of-profile traffic.
Select Drop the packet to discard the out-of-profile traffic.
Select Change the DSCP value to replace the DSCP field with the value
specified in the Out of profile DSCP field.
Select Set Out-Drop Precedence to mark out-of-profile traffic and drop
it when network is congested.
Select Do not drop the matching frame previously marked for
dropping to queue the frames that are marked to be dropped.

Add

Click Add to insert the entry in the summary table below and save your
changes to the Switch’s run-time memory. The Switch loses these changes
if it is turned off or loses power, so use the Save link on the top navigation
panel to save your changes to the non-volatile memory when you are
done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

Clear

Click Clear to set the above fields back to the factory defaults.

21.3 Viewing and Editing Policy Configuration
To view a summary of the classifier configuration, scroll down to the summary
table at the bottom of the Policy screen. To change the settings of a rule, click a
number in the Index field.

Figure 95 Advanced Application > Policy Rule: Summary Table

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The following table describes the labels in this screen.

Table 51 Policy: Summary Table

184

LABEL

DESCRIPTION

Index

This field displays the policy index number. Click an index number to edit the
policy.

Active

This field displays Yes when policy is activated and No when is it
deactivated.

Name

This field displays the name you have assigned to this policy.

Classifier(
s)

This field displays the name(s) of the classifier to which this policy applies.

Delete

Click Delete to remove the selected entry from the summary table.

Cancel

Click Cancel to clear the Delete check boxes.

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21.4 Policy Example
The figure below shows an example Policy screen where you configure a policy to
limit bandwidth and discard out-of-profile traffic on a traffic flow classified using
the Example classifier (refer to Section 20.4 on page 178).

Figure 96 Policy Example

EXAMPLE

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CHAPTER

22

Queuing Method
This chapter introduces the queuing methods supported.

22.1 Queuing Method Overview
Queuing is used to help solve performance degradation when there is network
congestion. Use the Queuing Method screen to configure queuing algorithms for
outgoing traffic. See also Priority Queue Assignment in Switch Setup and
802.1p Priority in Port Setup for related information.
Queuing algorithms allow switches to maintain separate queues for packets from
each individual source or flow and prevent a source from monopolizing the
bandwidth.

22.1.1 Strictly Priority
Strictly Priority (SP) services queues based on priority only. As traffic comes into
the Switch, traffic on the highest priority queue, Q7 is transmitted first. When that
queue empties, traffic on the next highest-priority queue, Q6 is transmitted until
Q6 empties, and then traffic is transmitted on Q5 and so on. If higher priority
queues never empty, then traffic on lower priority queues never gets sent. SP
does not automatically adapt to changing network requirements.

22.1.2 Weighted Fair Queuing
Weighted Fair Queuing is used to guarantee each queue's minimum bandwidth
based on its bandwidth weight (the number you configure in the Weight field)
when there is traffic congestion. WFQ is activated only when a port has more
traffic than it can handle. Queues with larger weights get more guaranteed
bandwidth than queues with smaller weights. By default, the weight for Q0 is 1,
for Q1 is 2, for Q2 is 3, and so on.
The weights range from 1 to 15 and the actual guaranteed bandwidth is calculated
as follows:

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2(Weight -1) x 10 KB

If the weight setting is 5, the actual quantum guaranteed to the associated queue
would be as follows:
24 x 10KB = 160 KB

22.1.3 Weighted Round Robin Scheduling (WRR)
Round Robin Scheduling services queues on a rotating basis and is activated only
when a port has more traffic than it can handle. A queue is given an amount of
bandwidth irrespective of the incoming traffic on that port. This queue then moves
to the back of the list. The next queue is given an equal amount of bandwidth, and
then moves to the end of the list; and so on, depending on the number of queues
being used. This works in a looping fashion until a queue is empty.
Weighted Round Robin Scheduling (WRR) uses the same algorithm as round robin
scheduling, but services queues based on their priority and queue weight (the
number you configure in the queue Weight field) rather than a fixed amount of
bandwidth. WRR is activated only when a port has more traffic than it can handle.
Queues with larger weights get more service than queues with smaller weights.
This queuing mechanism is highly efficient in that it divides any available
bandwidth across the different traffic queues and returns to queues that have not
yet emptied.

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22.2 Configuring Queuing
Click Advanced Application > Queuing Method in the navigation panel.

Figure 97 Advanced Application > Queuing Method

The following table describes the labels in this screen.

Table 52 Advanced Application > Queuing Method
LABEL

DESCRIPTION

Port

This label shows the port you are configuring.

*

Settings in this row apply to all ports.
Use this row only if you want to make some settings the same for all ports. Use
this row first to set the common settings and then make adjustments on a
port-by-port basis.

Note: Changes in this row are copied to all the ports as soon as you make
them.

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Table 52 Advanced Application > Queuing Method (continued)
LABEL

DESCRIPTION

Method

Select SPQ (Strictly Priority Queuing), WFQ (Weighted Fair Queuing) or
WRR (Weighted Round Robin).
Strictly Priority services queues based on priority only. When the highest
priority queue empties, traffic on the next highest-priority queue begins. Q7
has the highest priority and Q0 the lowest.
Weighted Fair Queuing is used to guarantee each queue's minimum bandwidth
based on their bandwidth weight (the number you configure in the Weight
field). Queues with larger weights get more guaranteed bandwidth than
queues with smaller weights.
Weighted Round Robin Scheduling services queues on a rotating basis based
on their queue weight (the number you configure in the queue Weight field).
Queues with larger weights get more service than queues with smaller
weights.

Weight

When you select WFQ or WRR enter the queue weight here. Bandwidth is
divided across the different traffic queues according to their weights.

Q0-Q7

This field is applicable only when you select WFQ or WRR.
Select a queue (Q0 to Q7) to have the Switch use Strictly Priority to service
the subsequent queue(s) after and including the specified queue for the
1000Base-T, 1000Base-X and 10 Gigabit Ethernet ports. For example, if you
select Q5, the Switch services traffic on Q5, Q6 and Q7 using Strictly
Priority.
Select None to always use WFQ or WRR.

190

Apply

Click Apply to save your changes to the Switch’s run-time memory. The
Switch loses these changes if it is turned off or loses power, so use the Save
link on the top navigation panel to save your changes to the non-volatile
memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

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CHAPTER

23

VLAN Stacking
This chapter shows you how to configure VLAN stacking on your Switch. See the
chapter on VLANs for more background information on Virtual LAN

23.1 VLAN Stacking Overview
A service provider can use VLAN stacking to allow it to distinguish multiple
customers VLANs, even those with the same (customer-assigned) VLAN ID, within
its network.
Use VLAN stacking to add an outer VLAN tag to the inner IEEE 802.1Q tagged
frames that enter the network. By tagging the tagged frames (“double-tagged”
frames), the service provider can manage up to 4,094 VLAN groups with each
group containing up to 4,094 customer VLANs. This allows a service provider to
provide different service, based on specific VLANs, for many different customers.
A service provider’s customers may require a range of VLANs to handle multiple
applications. A service provider’s customers can assign their own inner VLAN tags
on ports for these applications. The service provider can assign an outer VLAN tag
for each customer. Therefore, there is no VLAN tag overlap among customers, so
traffic from different customers is kept separate.

23.1.1 VLAN Stacking Example
In the following example figure, both A and B are Service Provider’s Network
(SPN) customers with VPN tunnels between their head offices and branch offices
respectively. Both have an identical VLAN tag for their VLAN group. The service
provider can separate these two VLANs within its network by adding tag 37 to

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distinguish customer A and tag 48 to distinguish customer B at edge device 1 and
then stripping those tags at edge device 2 as the data frames leave the network.

Figure 98 VLAN Stacking Example

23.2 VLAN Stacking Port Roles
Each port can have three VLAN stacking “roles”, Normal, Access Port and
Tunnel (the latter is for Gigabit ports only).
• Select Normal for “regular” (non-VLAN stacking) IEEE 802.1Q frame switching.
• Select Access Port for ingress ports on the service provider's edge devices (1
and 2 in the VLAN stacking example figure). The incoming frame is treated as
"untagged", so a second VLAN tag (outer VLAN tag) can be added.

Note: Static VLAN Tx Tagging MUST be disabled on a port where you choose
Normal or Access Port.
• Select Tunnel Port (available for Gigabit ports only) for egress ports at the
edge of the service provider's network. All VLANs belonging to a customer can
be aggregated into a single service provider's VLAN (using the outer VLAN tag
defined by the Service Provider’s (SP) VLAN ID (VID)).

Note: Static VLAN Tx Tagging MUST be enabled on a port where you choose Tunnel
Port.

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23.3 VLAN Tag Format
A VLAN tag (service provider VLAN stacking or customer IEEE 802.1Q) consists of
the following three fields.

Table 53 VLAN Tag Format
Type

Priority

VID

Type is a standard Ethernet type code identifying the frame and indicates that
whether the frame carries IEEE 802.1Q tag information. SP TPID (Service
Provider Tag Protocol Identifier) is the service provider VLAN stacking tag type.
Many vendors use 0x8100 or 0x9100.
TPID (Tag Protocol Identifier) is the customer IEEE 802.1Q tag.
• If the VLAN stacking port role is Access Port, then the Switch adds the SP
TPID tag to all incoming frames on the service provider's edge devices (1 and 2
in the VLAN stacking example figure).
• If the VLAN stacking port role is Tunnel Port, then the Switch only adds the SP
TPID tag to all incoming frames on the service provider's edge devices (1 and 2
in the VLAN stacking example figure) that have an SP TPID different to the one
configured on the Switch. (If an incoming frame’s SP TPID is the same as the
one configured on the Switch, then the Switch will not add the tag.)
Priority refers to the IEEE 802.1p standard that allows the service provider to
prioritize traffic based on the class of service (CoS) the customer has paid for.
• On the Switch, configure priority level of the inner IEEE 802.1Q tag in the Port
Setup screen.
• "0" is the lowest priority level and "7" is the highest.
VID is the VLAN ID. SP VID is the VID for the second (service provider’s) VLAN
tag.

23.3.1 Frame Format
The frame format for an untagged Ethernet frame, a single-tagged 802.1Q frame
(customer) and a “double-tagged” 802.1Q frame (service provider) is shown next.

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Configure the fields as highlighted in the Switch VLAN Stacking screen.

Table 54 Single and Double Tagged 802.11Q Frame Format
DA

D
A

SA SPTPI
D

SA

Len/
Etype

Dat
a

FCS

Untagged
Ethernet
frame

DA

SA

TPI
D

Priorit VI
y
D

Len/
Etype

Dat
a

FCS

IEEE 802.1Q
customer
tagged
frame

Priori
ty

VI
D

TPI
D

Priorit VI
y
D

Len/
Etype

Dat
a

FCS

Doubletagged
frame

Table 55 802.1Q Frame
DA

Destination Address

Priority

802.1p Priority

SA

Source Address

Len/
Etype

Length and type of Ethernet
frame

(SP)TPI
D

(Service Provider) Tag Protocol
IDentifier

Data

Frame data

VID

VLAN ID

FCS

Frame Check Sequence

23.4 Configuring VLAN Stacking
Click Advanced Applications > VLAN Stacking to display the screen as shown.

Figure 99 Advanced Application > VLAN Stacking

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The following table describes the labels in this screen.

Table 56 Advanced Application > VLAN Stacking
LABEL

DESCRIPTION

Active

Select this checkbox to enable VLAN stacking on the Switch.

Port

The port number identifies the port you are configuring.

*

Settings in this row apply to all ports.
Use this row only if you want to make some settings the same for all ports. Use
this row first to set the common settings and then make adjustments on a portby-port basis.

Note: Changes in this row are copied to all the ports as soon as you make
them.
Role

Select Normal to have the Switch ignore frames received (or transmitted) on
this port with VLAN stacking tags. Anything you configure in SPVID and
Priority of the Port-based QinQ or the Selective QinQ screen are ignored.
Select Access Port to have the Switch add the SP TPID tag to all incoming
frames received on this port. Select Access Port for ingress ports at the edge
of the service provider's network.
Select Tunnel Port (available for Gigabit ports only) for egress ports at the
edge of the service provider's network. Select Tunnel Port to have the Switch
add the Tunnel TPID tag to all outgoing frames sent on this port.
In order to support VLAN stacking on a port, the port must be able to allow
frames of 1526 Bytes (1522 Bytes + 4 Bytes for the second tag) to pass
through it.

Tunnel
TPID

TPID is a standard Ethernet type code identifying the frame and indicates
whether the frame carries IEEE 802.1Q tag information. Enter a four-digit
hexadecimal number from 0000 to FFFF that the Switch adds in the outer VLAN
tag of the frames sent on the tunnel port(s). The Switch also uses this to check
if the received frames are double-tagged.
The value of this field is 0x8100 as defined in IEEE 802.1Q. If the Switch needs
to communicate with other vendors’ devices, they should use the same TPID.

Note: You can define up to four different tunnel TPIDs (including 8100) in
this screen at a time.
Apply

Click Apply to save your changes to the Switch’s run-time memory. The Switch
loses these changes if it is turned off or loses power, so use the Save link on
the top navigation panel to save your changes to the non-volatile memory
when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

23.4.1 Port-based Q-in-Q
Port-based Q-in-Q lets the Switch treat all frames received on the same port as
the same VLAN flows and add the same outer VLAN tag to them, even they have
different customer VLAN IDs.

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Click Port-based QinQ in the Advanced Application > VLAN Stacking screen
to display the screen as shown.

Figure 100 Advanced Application > VLAN Stacking > Port-based QinQ

The following table describes the labels in this screen.

Table 57 Advanced Application > VLAN Stacking > Port-based QinQ
LABEL

DESCRIPTION

Port

The port number identifies the port you are configuring.

SPVID

SPVID is the service provider’s VLAN ID (the outer VLAN tag). Enter the
service provider ID (from 1 to 4094) for frames received on this port. See
Chapter 9 on page 95 for more background information on VLAN ID.

Priority

Select a priority level (from 0 to 7). This is the service provider’s priority level
that adds to the frames received on this port.
"0" is the lowest priority level and "7" is the highest.

Apply

Click Apply to save your changes to the Switch’s run-time memory. The Switch
loses these changes if it is turned off or loses power, so use the Save link on
the top navigation panel to save your changes to the non-volatile memory
when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

23.4.2 Selective Q-in-Q
Selective Q-in-Q is VLAN-based. It allows the Switch to add different outer VLAN
tags to the incoming frames received on one port according to their inner VLAN
tags.

Note: Selective Q-in-Q rules are only applied to single-tagged frames received on the
access ports. If the incoming frames are untagged or single-tagged but
received on a tunnel port or cannot match any selective Q-in-Q rules, the
Switch applies the port-based Q-in-Q rules to them.

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Click Selective QinQ in the Advanced Application > VLAN Stacking screen to
display the screen as shown.

Figure 101 Advanced Application > VLAN Stacking > Selective QinQ

The following table describes the labels in this screen.

Table 58 Advanced Application > VLAN Stacking > Selective QinQ
LABEL

DESCRIPTION

Active

Check this box to activate this rule.

Name

Enter a descriptive name (up to 32 printable ASCII characters) for identification
purposes.

Port

The port number identifies the port you are configuring.

CVID

Enter a customer VLAN ID (the inner VLAN tag) from 1 to 4094. This is the
VLAN tag carried in the packets from the subscribers.

SPVID

SPVID is the service provider’s VLAN ID (the outer VLAN tag). Enter the
service provider ID (from 1 to 4094) for frames received on this port. See
Chapter 9 on page 95 for more background information on VLAN ID.

Priority

Select a priority level (from 0 to 7). This is the service provider’s priority level
that adds to the frames received on this port.
"0" is the lowest priority level and "7" is the highest.

Add

Click Add to save your changes to the Switch’s run-time memory. The Switch
loses these changes if it is turned off or loses power, so use the Save link on
the top navigation panel to save your changes to the non-volatile memory
when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

Index

This is the number of the selective VLAN stacking rule.

Active

This shows whether this rule is activated or not.

Name

This is the descriptive name for this rule.

Port

This is the port number to which this rule is applied.

VID

This is the customer VLAN ID in the incoming packets.

SPVID

This is the service provider’s VLAN ID that adds to the packets from the
subscribers.

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Table 58 Advanced Application > VLAN Stacking > Selective QinQ (continued)

198

LABEL

DESCRIPTION

Priority

This is the service provider’s priority level in the packets.

Delete

Check the rule(s) that you want to remove in the Delete column and then click
the Delete button.

Cancel

Click Cancel to clear the Delete check boxes.

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24
Multicast

This chapter shows you how to configure various multicast features.

24.1 Multicast Overview
Traditionally, IP packets are transmitted in one of either two ways - Unicast (1
sender to 1 recipient) or Broadcast (1 sender to everybody on the network).
Multicast delivers IP packets to just a group of hosts on the network.
IGMP (Internet Group Management Protocol) is a network-layer protocol used to
establish membership in a multicast group - it is not used to carry user data. Refer
to RFC 1112, RFC 2236 and RFC 3376 for information on IGMP versions 1, 2 and 3
respectively.

24.1.1 IP Multicast Addresses
In IPv4, a multicast address allows a device to send packets to a specific group of
hosts (multicast group) in a different subnetwork. A multicast IP address
represents a traffic receiving group, not individual receiving devices. IP addresses
in the Class D range (224.0.0.0 to 239.255.255.255) are used for IP multicasting.
Certain IP multicast numbers are reserved by IANA for special purposes (see the
IANA website for more information).

24.1.2 IGMP Filtering
With the IGMP filtering feature, you can control which IGMP groups a subscriber
on a port can join. This allows you to control the distribution of multicast services
(such as content information distribution) based on service plans and types of
subscription.
You can set the Switch to filter the multicast group join reports on a per-port basis
by configuring an IGMP filtering profile and associating the profile to a port.

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24.1.3 IGMP Snooping
The Switch can passively snoop on IGMP packets transferred between IP multicast
routers/switches and IP multicast hosts to learn the IP multicast group
membership. It checks IGMP packets passing through it, picks out the group
registration information, and configures multicasting accordingly. IGMP snooping
allows the Switch to learn multicast groups without you having to manually
configure them.
The Switch forwards multicast traffic destined for multicast groups (that it has
learned from IGMP snooping or that you have manually configured) to ports that
are members of that group. IGMP snooping generates no additional network
traffic, allowing you to significantly reduce multicast traffic passing through your
Switch.

24.1.4 IGMP Snooping and VLANs
The Switch can perform IGMP snooping on up to 16 VLANs. You can configure the
Switch to automatically learn multicast group membership of any VLANs. The
Switch then performs IGMP snooping on the first 16 VLANs that send IGMP
packets. This is referred to as auto mode. Alternatively, you can specify the VLANs
that IGMP snooping should be performed on. This is referred to as fixed mode. In
fixed mode the Switch does not learn multicast group membership of any VLANs
other than those explicitly added as an IGMP snooping VLAN.

24.2 Multicast Status
Click Advanced Applications > Multicast to display the screen as shown. This
screen shows the multicast group information. See Section 24.1 on page 199 for
more information on multicasting.

Figure 102 Advanced Application > Multicast

The following table describes the labels in this screen.

Table 59 Multicast Status

200

LABEL

DESCRIPTION

Index

This is the index number of the entry.

VID

This field displays the multicast VLAN ID.

Port

This field displays the port number that belongs to the multicast group.

Multicast Group

This field displays IP multicast group addresses.

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24.3 Multicast Setting
Click Advanced Applications > Multicast > Multicast Setting link to display
the screen as shown. See Section 24.1 on page 199 for more information on
multicasting.

Figure 103 Advanced Application > Multicast > Multicast Setting

The following table describes the labels in this screen.

Table 60 Advanced Application > Multicast > Multicast Setting
LABEL

DESCRIPTION

IGMP Snooping

Use these settings to configure IGMP Snooping.

Active

Select Active to enable IGMP Snooping to forward group multicast
traffic only to ports that are members of that group.

Querier

Select this option to allow the Switch to send IGMP General Query
messages to the VLANs with the multicast hosts attached.

Host Timeout

Specify the time (from 1 to 16 711 450) in seconds that elapses before
the Switch removes an IGMP group membership entry if it does not
receive report messages from the port.

802.1p Priority

Select a priority level (0-7) to which the Switch changes the priority in
outgoing IGMP control packets. Otherwise, select No-Change to not
replace the priority.

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Table 60 Advanced Application > Multicast > Multicast Setting (continued)
LABEL

DESCRIPTION

IGMP Filtering

Select Active to enable IGMP filtering to control which IGMP groups a
subscriber on a port can join.

Note: If you enable IGMP filtering, you must create and assign
IGMP filtering profiles for the ports that you want to allow to
join multicast groups.
Unknown
Multicast Frame

Specify the action to perform when the Switch receives an unknown
multicast frame. Select Drop to discard the frame(s). Select Flooding
to send the frame(s) to all ports.

Reserved
Multicast Group

The IP address range of 224.0.0.0 to 224.0.0.255 are reserved for
multicasting on the local network only. For example, 224.0.0.1 is for all
hosts on a local network segment and 224.0.0.9 is used to send RIP
routing information to all RIP v2 routers on the same network segment.
A multicast router will not forward a packet with the destination IP
address within this range to other networks. See the IANA web site for
more information.
The layer 2 multicast MAC addresses used by Cisco layer 2 protocols,
01:00:0C:CC:CC:CC and 01:00:0C:CC:CC:CD, are also included in this
group.
Specify the action to perform when the Switch receives a frame with a
reserved multicast address. Select Drop to discard the frame(s). Select
Flooding to send the frame(s) to all ports.

Port

This field displays the port number.

*

Settings in this row apply to all ports.
Use this row only if you want to make some settings the same for all
ports. Use this row first to set the common settings and then make
adjustments on a port-by-port basis.

Note: Changes in this row are copied to all the ports as soon as
you make them.
Immed. Leave

Select this option to set the Switch to remove this port from the
multicast tree when an IGMP version 2 leave message is received on
this port.
Select this option if there is only one host connected to this port.

Normal Leave

Enter an IGMP normal leave timeout value (from 200 to 6,348,800) in
miliseconds. Select this option to have the Switch use this timeout to
update the forwarding table for the port.
This defines how many seconds the Switch waits for an IGMP report
before removing an IGMP snooping membership entry when an IGMP
leave message is received on this port from a host.

Fast Leave

Enter an IGMP fast leave timeout value (from 200 to 6,348,800) in
miliseconds. Select this option to have the Switch use this timeout to
update the forwarding table for the port.
This defines how many seconds the Switch waits for an IGMP report
before removing an IGMP snooping membership entry when an IGMP
leave message is received on this port from a host.

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Table 60 Advanced Application > Multicast > Multicast Setting (continued)
LABEL

DESCRIPTION

Group Limited

Select this option to limit the number of multicast groups this port is
allowed to join.

Max Group
Num.

Enter the number of multicast groups this port is allowed to join. Once a
port is registered in the specified number of multicast groups, any new
IGMP join report frame(s) is dropped on this port.

Throttling

IGMP throttling controls how the Switch deals with the IGMP reports
when the maximum number of the IGMP groups a port can join is
reached.
Select Deny to drop any new IGMP join report received on this port
until an existing multicast forwarding table entry is aged out.
Select Replace to replace an existing entry in the multicast forwarding
table with the new IGMP report(s) received on this port.

IGMP Filtering
Profile

Select the name of the IGMP filtering profile to use for this port.
Otherwise, select Default to prohibit the port from joining any
multicast group.
You can create IGMP filtering profiles in the Multicast > Multicast
Setting > IGMP Filtering Profile screen.

IGMP Querier
Mode

The Switch treats an IGMP query port as being connected to an IGMP
multicast router (or server). The Switch forwards IGMP join or leave
packets to an IGMP query port.
Select Auto to have the Switch use the port as an IGMP query port if
the port receives IGMP query packets.
Select Fixed to have the Switch always use the port as an IGMP query
port. Select this when you connect an IGMP multicast server to the
port.
Select Edge to stop the Switch from using the port as an IGMP query
port. The Switch will not keep any record of an IGMP router being
connected to this port. The Switch does not forward IGMP join or leave
packets to this port.

Apply

Click Apply to save your changes to the Switch’s run-time memory. The
Switch loses these changes if it is turned off or loses power, so use the
Save link on the top navigation panel to save your changes to the nonvolatile memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

24.4 IGMP Snooping VLAN
Click Advanced Applications > Multicast in the navigation panel. Click the
Multicast Setting link and then the IGMP Snooping VLAN link to display the

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screen as shown. See Section 24.1.4 on page 200 for more information on IGMP
Snooping VLAN.

Figure 104 Advanced Application > Multicast > Multicast Setting > IGMP Snooping
VLAN

The following table describes the labels in this screen.

Table 61 Advanced Application > Multicast > Multicast Setting > IGMP Snooping
VLAN
LABEL

DESCRIPTION

Mode

Select auto to have the Switch learn multicast group membership
information of any VLANs automatically.
Select fixed to have the Switch only learn multicast group membership
information of the VLAN(s) that you specify below.
In either auto or fixed mode, the Switch can learn up to 16 VLANs
(including up to five VLANs you configured in the MVR screen). For
example, if you have configured one multicast VLAN in the MVR screen,
you can only specify up to 15 VLANs in this screen.
The Switch drops any IGMP control messages which do not belong to
these 16 VLANs.

Note: You must also enable IGMP snooping in the Multicast
Setting screen first.

204

Apply

Click Apply to save your changes to the Switch’s run-time memory. The
Switch loses these changes if it is turned off or loses power, so use the
Save link on the top navigation panel to save your changes to the nonvolatile memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

VLAN

Use this section of the screen to add VLANs upon which the Switch is to
perform IGMP snooping.

Name

Enter the descriptive name of the VLAN for identification purposes.

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Table 61 Advanced Application > Multicast > Multicast Setting > IGMP Snooping
VLAN (continued)
LABEL

DESCRIPTION

VID

Enter the ID of a static VLAN; the valid range is between 1 and 4094.

Note: You cannot configure the same VLAN ID as in the MVR
screen.
Add

Click Add to insert the entry in the summary table below and save your
changes to the Switch’s run-time memory. The Switch loses these
changes if it is turned off or loses power, so use the Save link on the
top navigation panel to save your changes to the non-volatile memory
when you are done configuring.

Cancel

Click Cancel to reset the fields to your previous configuration.

Clear

Click this to clear the fields.

Index

This is the number of the IGMP snooping VLAN entry in the table.

Name

This field displays the descriptive name for this VLAN group.

VID

This field displays the ID number of the VLAN group.

Delete

Check the rule(s) that you want to remove in the Delete column, then
click the Delete button.

Cancel

Click Cancel to clear the Delete check boxes.

24.5 IGMP Filtering Profile
An IGMP filtering profile specifies a range of multicast groups that clients
connected to the Switch are able to join. A profile contains a range of multicast IP
addresses which you want clients to be able to join. Profiles are assigned to ports
(in the Multicast Setting screen). Clients connected to those ports are then able
to join the multicast groups specified in the profile. Each port can be assigned a
single profile. A profile can be assigned to multiple ports.

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Click Advanced Applications > Multicast > Multicast Setting > IGMP
Filtering Profile link to display the screen as shown.

Figure 105 Advanced Application > Multicast > Multicast Setting > IGMP Filtering
Profile

The following table describes the labels in this screen.

Table 62 Advanced Application > Multicast > Multicast Setting > IGMP Filtering
Profile
LABEL

DESCRIPTION

Profile Name

Enter a descriptive name for the profile for identification purposes.
To configure additional rule(s) for a profile that you have already added,
enter the profile name and specify a different IP multicast address
range.

Start Address

Type the starting multicast IP address for a range of multicast IP
addresses that you want to belong to the IGMP filter profile.

End Address

Type the ending multicast IP address for a range of IP addresses that
you want to belong to the IGMP filter profile.
If you want to add a single multicast IP address, enter it in both the
Start Address and End Address fields.

206

Add

Click Add to save the profile to the Switch’s run-time memory. The
Switch loses these changes if it is turned off or loses power, so use the
Save link on the top navigation panel to save your changes to the nonvolatile memory when you are done configuring.

Clear

Click Clear to clear the fields to the factory defaults.

Profile Name

This field displays the descriptive name of the profile.

Start Address

This field displays the start of the multicast address range.

End Address

This field displays the end of the multicast address range.

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Table 62 Advanced Application > Multicast > Multicast Setting > IGMP Filtering
Profile (continued)
LABEL

DESCRIPTION

Delete

To delete the profile(s) and all the accompanying rules, select the
profile(s) that you want to remove in the Delete Profile column, then
click the Delete button.
To delete a rule(s) from a profile, select the rule(s) that you want to
remove in the Delete Rule column, then click the Delete button.

Cancel

Click Cancel to clear the Delete Profile/Delete Rule check boxes.

24.6 MVR Overview
Multicast VLAN Registration (MVR) is designed for applications (such as Media-onDemand (MoD)) that use multicast traffic across an Ethernet ring-based service
provider network.
MVR allows one single multicast VLAN to be shared among different subscriber
VLANs on the network. While isolated in different subscriber VLANs, connected
devices can subscribe to and unsubscribe from the multicast stream in the
multicast VLAN. This improves bandwidth utilization with reduced multicast traffic
in the subscriber VLANs and simplifies multicast group management.
MVR only responds to IGMP join and leave control messages from multicast
groups that are configured under MVR. Join and leave reports from other multicast
groups are managed by IGMP snooping.
The following figure shows a network example. The subscriber VLAN (1, 2 and 3)
information is hidden from the streaming media server, S. In addition, the
multicast VLAN information is only visible to the Switch and S.

Figure 106 MVR Network Example
VLAN 1

Multicast VLAN

S

VLAN 2
VLAN 3

24.6.1 Types of MVR Ports
In MVR, a source port is a port on the Switch that can send and receive multicast
traffic in a multicast VLAN while a receiver port can only receive multicast traffic.

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Once configured, the Switch maintains a forwarding table that matches the
multicast stream to the associated multicast group.

24.6.2 MVR Modes
You can set your Switch to operate in either dynamic or compatible mode.
In dynamic mode, the Switch sends IGMP leave and join reports to the other
multicast devices (such as multicast routers or servers) in the multicast VLAN.
This allows the multicast devices to update the multicast forwarding table to
forward or not forward multicast traffic to the receiver ports.
In compatible mode, the Switch does not send any IGMP reports. In this case, you
must manually configure the forwarding settings on the multicast devices in the
multicast VLAN.

24.6.3 How MVR Works
The following figure shows a multicast television example where a subscriber
device (such as a computer) in VLAN 1 receives multicast traffic from the
streaming media server, S, via the Switch. Multiple subscriber devices can connect
through a port configured as the receiver on the Switch.
When the subscriber selects a television channel, computer A sends an IGMP
report to the Switch to join the appropriate multicast group. If the IGMP report
matches one of the configured MVR multicast group addresses on the Switch, an
entry is created in the forwarding table on the Switch. This maps the subscriber
VLAN to the list of forwarding destinations for the specified multicast traffic.
When the subscriber changes the channel or turns off the computer, an IGMP
leave message is sent to the Switch to leave the multicast group. The Switch
sends a query to VLAN 1 on the receiver port (in this case, an uplink port on the
Switch). If there is another subscriber device connected to this port in the same
subscriber VLAN, the receiving port will still be on the list of forwarding destination
for the multicast traffic. Otherwise, the Switch removes the receiver port from the
forwarding table.

Figure 107 MVR Multicast Television Example
VLAN 1

Multicast VLAN

S

A

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24.7 General MVR Configuration
Use the MVR screen to create multicast VLANs and select the receiver port(s) and
a source port for each multicast VLAN. Click Advanced Applications >
Multicast > Multicast Setting > MVR link to display the screen as shown next.

Note: You can create up to five multicast VLANs and up to 256 multicast rules on the
Switch.
Note: Your Switch automatically creates a static VLAN (with the same VID) when you
create a multicast VLAN in this screen.
Figure 108 Advanced Application > Multicast > Multicast Setting > MVR

The following table describes the related labels in this screen.

Table 63 Advanced Application > Multicast > Multicast Setting > MVR
LABEL

DESCRIPTION

Active

Select this check box to enable MVR to allow one single multicast VLAN
to be shared among different subscriber VLANs on the network.

Name

Enter a descriptive name (up to 32 printable ASCII characters) for
identification purposes.

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Table 63 Advanced Application > Multicast > Multicast Setting > MVR (continued)
LABEL

DESCRIPTION

Multicast VLAN
ID

Enter the VLAN ID (1 to 4094) of the multicast VLAN.

802.1p Priority

Select a priority level (0-7) with which the Switch replaces the priority in
outgoing IGMP control packets (belonging to this multicast VLAN).

Mode

Specify the MVR mode on the Switch. Choices are Dynamic and
Compatible.
Select Dynamic to send IGMP reports to all MVR source ports in the
multicast VLAN.
Select Compatible to set the Switch not to send IGMP reports.

Port

This field displays the port number on the Switch.

*

Settings in this row apply to all ports.
Use this row only if you want to make some settings the same for all
ports. Use this row first to set the common settings and then make
adjustments on a port-by-port basis.

Note: Changes in this row are copied to all the ports as soon as you
make them.

210

Source Port

Select this option to set this port as the MVR source port that sends and
receives multicast traffic. All source ports must belong to a single
multicast VLAN.

Receiver Port

Select this option to set this port as a receiver port that only receives
multicast traffic.

None

Select this option to set the port not to participate in MVR. No MVR
multicast traffic is sent or received on this port.

Tagging

Select this checkbox if you want the port to tag the VLAN ID in all
outgoing frames transmitted.

Add

Click Add to save your changes to the Switch’s run-time memory. The
Switch loses these changes if it is turned off or loses power, so use the
Save link on the top navigation panel to save your changes to the nonvolatile memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

VLAN

This field displays the multicast VLAN ID.

Active

This field displays whether the multicast group is enabled or not.

Name

This field displays the descriptive name for this setting.

Mode

This field displays the MVR mode.

Source Port

This field displays the source port number(s).

Receiver Port

This field displays the receiver port number(s).

802.1p

This field displays the priority level.

Delete

To delete a multicast VLAN(s), select the rule(s) that you want to
remove in the Delete column, then click the Delete button.

Cancel

Click Cancel to clear the Delete check boxes.

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24.8 MVR Group Configuration
All source ports and receiver ports belonging to a multicast group can receive
multicast data sent to this multicast group.
Configure MVR IP multicast group address(es) in the Group Configuration
screen. Click Group Configuration in the MVR screen.

Note: A port can belong to more than one multicast VLAN. However, IP multicast
group addresses in different multicast VLANs cannot overlap.
Figure 109 Advanced Application > Multicast > Multicast Setting > MVR: Group
Configuration

The following table describes the labels in this screen.

Table 64 Advanced Application > Multicast > Multicast Setting > MVR: Group
Configuration
LABEL

DESCRIPTION

Multicast
VLAN ID

Select a multicast VLAN ID (that you configured in the MVR screen) from
the drop-down list box.

Name

Enter a descriptive name for identification purposes.

Start
Address

Enter the starting IP multicast address of the multicast group in dotted
decimal notation.
Refer to Section 24.1.1 on page 199 for more information on IP multicast
addresses.

End Address

Enter the ending IP multicast address of the multicast group in dotted
decimal notation.
Enter the same IP address as the Start Address field if you want to
configure only one IP address for a multicast group.
Refer to Section 24.1.1 on page 199 for more information on IP multicast
addresses.

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Table 64 Advanced Application > Multicast > Multicast Setting > MVR: Group
Configuration
LABEL

DESCRIPTION

Add

Click Add to save your changes to the Switch’s run-time memory. The
Switch loses these changes if it is turned off or loses power, so use the
Save link on the top navigation panel to save your changes to the nonvolatile memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

MVLAN

This field displays the multicast VLAN ID.

Name

This field displays the descriptive name for this setting.

Start
Address

This field displays the starting IP address of the multicast group.

End Address

This field displays the ending IP address of the multicast group.

Delete

Select Delete All or Delete Group and click Delete to remove the
selected entry(ies) from the table.

Cancel

Select Cancel to clear the checkbox(es) in the table.

24.8.1 MVR Configuration Example
The following figure shows a network example where ports 1, 2 and 3 on the
Switch belong to VLAN 1. In addition, port 7 belongs to the multicast group with
VID 200 to receive multicast traffic (the News and Movie channels) from the
remote streaming media server, S. Computers A, B and C in VLAN 1 are able to
receive the traffic.

Figure 110 MVR Configuration Example
VLAN 1

A

B

Multicast VID 200
1
2
3

News: 224.1.4.10 ~ 224.1.4.50
Movie: 230.1.2.50 ~230.1.2.60

7

S

C

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To configure the MVR settings on the Switch, create a multicast group in the MVR
screen and set the receiver and source ports.

Figure 111 MVR Configuration Example

EXAMPLE

To set the Switch to forward the multicast group traffic to the subscribers,
configure multicast group settings in the Group Configuration screen. The

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following figure shows an example where two multicast groups (News and
Movie) are configured for the multicast VLAN 200.

Figure 112 MVR Group Configuration Example

EXAMPLE

Figure 113 MVR Group Configuration Example

EXAMPLE

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25
AAA

This chapter describes how to configure authentication, authorization and
accounting settings on the Switch.

25.1 Authentication, Authorization and
Accounting (AAA)
Authentication is the process of determining who a user is and validating access to
the Switch. The Switch can authenticate users who try to log in based on user
accounts configured on the Switch itself. The Switch can also use an external
authentication server to authenticate a large number of users.
Authorization is the process of determining what a user is allowed to do. Different
user accounts may have higher or lower privilege levels associated with them. For
example, user A may have the right to create new login accounts on the Switch
but user B cannot. The Switch can authorize users based on user accounts
configured on the Switch itself or it can use an external server to authorize a large
number of users.
Accounting is the process of recording what a user is doing. The Switch can use an
external server to track when users log in, log out, execute commands and so on.
Accounting can also record system related actions such as boot up and shut down
times of the Switch.
The external servers that perform authentication, authorization and accounting
functions are known as AAA servers. The Switch supports RADIUS (Remote
Authentication Dial-In User Service, see Section 25.1.2 on page 216) and
TACACS+ (Terminal Access Controller Access-Control System Plus, see Section

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Chapter 25 AAA
25.1.2 on page 216) as external authentication, authorization and accounting
servers.

Figure 114 AAA Server

Client

AAA Server

25.1.1 Local User Accounts
By storing user profiles locally on the Switch, your Switch is able to authenticate
and authorize users without interacting with a network AAA server. However, there
is a limit on the number of users you may authenticate in this way (See Chapter
40 on page 337).

25.1.2 RADIUS and TACACS+
RADIUS and TACACS+ are security protocols used to authenticate users by means
of an external server instead of (or in addition to) an internal device user database
that is limited to the memory capacity of the device. In essence, RADIUS and
TACACS+ authentication both allow you to validate an unlimited number of users
from a central location.
The following table describes some key differences between RADIUS and
TACACS+.

Table 65 RADIUS vs TACACS+
RADIUS

TACACS+

Transport
Protocol

UDP (User Datagram Protocol)

TCP (Transmission Control Protocol)

Encryption

Encrypts the password sent for
authentication.

All communication between the client
(the Switch) and the TACACS server
is encrypted.

25.2 AAA Screens
The AAA screens allow you to enable authentication, authorization, accounting or
all of them on the Switch. First, configure your authentication and accounting
server settings (RADIUS, TACACS+ or both) and then set up the authentication
priority, activate authorization and configure accounting settings.

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Click Advanced Application > AAA in the navigation panel to display the screen
as shown.

Figure 115 Advanced Application > AAA

25.2.1 RADIUS Server Setup
Use this screen to configure your RADIUS server settings. See Section 25.1.2 on
page 216 for more information on RADIUS servers and Section 25.3 on page 226
for RADIUS attributes utilized by the authentication and accounting features on
the Switch. Click on the RADIUS Server Setup link in the AAA screen to view
the screen as shown.

Figure 116 Advanced Application > AAA > RADIUS Server Setup

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The following table describes the labels in this screen.

Table 66 Advanced Application > AAA > RADIUS Server Setup
LABEL

DESCRIPTION

Authentication
Server

Use this section to configure your RADIUS authentication settings.

Mode

This field only applies if you configure multiple RADIUS servers.
Select index-priority and the Switch tries to authenticate with the first
configured RADIUS server, if the RADIUS server does not respond then
the Switch tries to authenticate with the second RADIUS server.
Select round-robin to alternate between the RADIUS servers that it
sends authentication requests to.

Timeout

Specify the amount of time in seconds that the Switch waits for an
authentication request response from the RADIUS server.
If you are using index-priority for your authentication and you are
using two RADIUS servers then the timeout value is divided between the
two RADIUS servers. For example, if you set the timeout value to 30
seconds, then the Switch waits for a response from the first RADIUS
server for 15 seconds and then tries the second RADIUS server.

218

Index

This is a read-only number representing a RADIUS server entry.

IP Address

Enter the IP address of an external RADIUS server in dotted decimal
notation.

UDP Port

The default port of a RADIUS server for authentication is 1812. You
need not change this value unless your network administrator instructs
you to do so.

Shared Secret

Specify a password (up to 32 alphanumeric characters) as the key to be
shared between the external RADIUS server and the Switch. This key is
not sent over the network. This key must be the same on the external
RADIUS server and the Switch.

Delete

Check this box if you want to remove an existing RADIUS server entry
from the Switch. This entry is deleted when you click Apply.

Apply

Click Apply to save your changes to the Switch’s run-time memory. The
Switch loses these changes if it is turned off or loses power, so use the
Save link on the top navigation panel to save your changes to the nonvolatile memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

Accounting
Server

Use this section to configure your RADIUS accounting server settings.

Timeout

Specify the amount of time in seconds that the Switch waits for an
accounting request response from the RADIUS accounting server.

Index

This is a read-only number representing a RADIUS accounting server
entry.

IP Address

Enter the IP address of an external RADIUS accounting server in dotted
decimal notation.

UDP Port

The default port of a RADIUS accounting server for accounting is 1813.
You need not change this value unless your network administrator
instructs you to do so.

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Table 66 Advanced Application > AAA > RADIUS Server Setup (continued)
LABEL

DESCRIPTION

Shared Secret

Specify a password (up to 32 alphanumeric characters) as the key to be
shared between the external RADIUS accounting server and the Switch.
This key is not sent over the network. This key must be the same on the
external RADIUS accounting server and the Switch.

Delete

Check this box if you want to remove an existing RADIUS accounting
server entry from the Switch. This entry is deleted when you click Apply.

Apply

Click Apply to save your changes to the Switch’s run-time memory. The
Switch loses these changes if it is turned off or loses power, so use the
Save link on the top navigation panel to save your changes to the nonvolatile memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

25.2.2 TACACS+ Server Setup
Use this screen to configure your TACACS+ server settings. See Section 25.1.2 on
page 216 for more information on TACACS+ servers. Click on the TACACS+
Server Setup link in the Authentication and Accounting screen to view the
screen as shown.

Figure 117 Advanced Application > AAA > TACACS+ Server Setup

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The following table describes the labels in this screen.

Table 67 Advanced Application > AAA > TACACS+ Server Setup
LABEL

DESCRIPTION

Authentication
Server

Use this section to configure your TACACS+ authentication settings.

Mode

This field is only valid if you configure multiple TACACS+ servers.
Select index-priority and the Switch tries to authenticate with the first
configured TACACS+ server, if the TACACS+ server does not respond
then the Switch tries to authenticate with the second TACACS+ server.
Select round-robin to alternate between the TACACS+ servers that it
sends authentication requests to.

Timeout

Specify the amount of time in seconds that the Switch waits for an
authentication request response from the TACACS+ server.
If you are using index-priority for your authentication and you are
using two TACACS+ servers then the timeout value is divided between
the two TACACS+ servers. For example, if you set the timeout value to
30 seconds, then the Switch waits for a response from the first TACACS+
server for 15 seconds and then tries the second TACACS+ server.

220

Index

This is a read-only number representing a TACACS+ server entry.

IP Address

Enter the IP address of an external TACACS+ server in dotted decimal
notation.

TCP Port

The default port of a TACACS+ server for authentication is 49. You need
not change this value unless your network administrator instructs you to
do so.

Shared Secret

Specify a password (up to 32 alphanumeric characters) as the key to be
shared between the external TACACS+ server and the Switch. This key is
not sent over the network. This key must be the same on the external
TACACS+ server and the Switch.

Delete

Check this box if you want to remove an existing TACACS+ server entry
from the Switch. This entry is deleted when you click Apply.

Apply

Click Apply to save your changes to the Switch’s run-time memory. The
Switch loses these changes if it is turned off or loses power, so use the
Save link on the top navigation panel to save your changes to the nonvolatile memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

Accounting
Server

Use this section to configure your TACACS+ accounting settings.

Timeout

Specify the amount of time in seconds that the Switch waits for an
accounting request response from the TACACS+ server.

Index

This is a read-only number representing a TACACS+ accounting server
entry.

IP Address

Enter the IP address of an external TACACS+ accounting server in dotted
decimal notation.

TCP Port

The default port of a TACACS+ accounting server is 49. You need not
change this value unless your network administrator instructs you to do
so.

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Table 67 Advanced Application > AAA > TACACS+ Server Setup (continued)
LABEL

DESCRIPTION

Shared Secret

Specify a password (up to 32 alphanumeric characters) as the key to be
shared between the external TACACS+ accounting server and the
Switch. This key is not sent over the network. This key must be the same
on the external TACACS+ accounting server and the Switch.

Delete

Check this box if you want to remove an existing TACACS+ accounting
server entry from the Switch. This entry is deleted when you click Apply.

Apply

Click Apply to save your changes to the Switch’s run-time memory. The
Switch loses these changes if it is turned off or loses power, so use the
Save link on the top navigation panel to save your changes to the nonvolatile memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

25.2.3 AAA Setup
Use this screen to configure authentication, authorization and accounting settings
on the Switch. Click on the AAA Setup link in the AAA screen to view the screen
as shown.

Figure 118 Advanced Application > AAA > AAA Setup

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The following table describes the labels in this screen.

Table 68 Advanced Application > AAA > AAA Setup
LABEL

DESCRIPTION

Authentication

Use this section to specify the methods used to authenticate users
accessing the Switch.

Privilege
Enable

These fields specify which database the Switch should use (first, second
and third) to authenticate access privilege level for administrator
accounts (users for Switch management).
Configure the access privilege of accounts via commands (See the
Ethernet Switch CLI Reference Guide) for local authentication. The
TACACS+ and RADIUS are external servers. Before you specify the
priority, make sure you have set up the corresponding database correctly
first.
You can specify up to three methods for the Switch to authenticate the
access privilege level of administrators. The Switch checks the methods
in the order you configure them (first Method 1, then Method 2 and
finally Method 3). You must configure the settings in the Method 1
field. If you want the Switch to check other sources for access privilege
level specify them in Method 2 and Method 3 fields.
Select local to have the Switch check the access privilege configured for
local authentication.
Select radius or tacacs+ to have the Switch check the access privilege
via the external servers.

Login

These fields specify which database the Switch should use (first, second
and third) to authenticate administrator accounts (users for Switch
management).
Configure the local user accounts in the Access Control > Logins
screen. The TACACS+ and RADIUS are external servers. Before you
specify the priority, make sure you have set up the corresponding
database correctly first.
You can specify up to three methods for the Switch to authenticate
administrator accounts. The Switch checks the methods in the order you
configure them (first Method 1, then Method 2 and finally Method 3).
You must configure the settings in the Method 1 field. If you want the
Switch to check other sources for administrator accounts, specify them in
Method 2 and Method 3 fields.
Select local to have the Switch check the administrator accounts
configured in the Access Control > Logins screen.
Select radius to have the Switch check the administrator accounts
configured via the RADIUS Server.
Select tacacs+ to have the Switch check the administrator accounts
configured via the TACACS+ Server.

Authorization

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Table 68 Advanced Application > AAA > AAA Setup (continued)
LABEL

DESCRIPTION

Type

Set whether the Switch provides the following services to a user.
•
•

Exec: Allow an administrator which logs in the Switch through Telnet
or SSH to have different access privilege level assigned via the
external server.
Dot1x: Allow an IEEE 802.1x client to have different bandwidth limit
or VLAN ID assigned via the external server.

Active

Select this to activate authorization for a specified event types.

Method

Select whether you want to use RADIUS or TACACS+ for authorization of
specific types of events.
RADIUS is the only method for IEEE 802.1x authorization.

Accounting

Use this section to configure accounting settings on the Switch.

Update Period

This is the amount of time in minutes before the Switch sends an update
to the accounting server. This is only valid if you select the start-stop
option for the Exec or Dot1x entries.

Type

The Switch supports the following types of events to be sent to the
accounting server(s):
•
•
•
•

System - Configure the Switch to send information when the
following system events occur: system boots up, system shuts down,
system accounting is enabled, system accounting is disabled
Exec - Configure the Switch to send information when an
administrator logs in and logs out via the console port, telnet or SSH.
Dot1x - Configure the Switch to send information when an IEEE
802.1x client begins a session (authenticates via the Switch), ends a
session as well as interim updates of a session.
Commands - Configure the Switch to send information when
commands of specified privilege level and higher are executed on the
Switch.

Active

Select this to activate accounting for a specified event types.

Broadcast

Select this to have the Switch send accounting information to all
configured accounting servers at the same time.
If you don’t select this and you have two accounting servers set up, then
the Switch sends information to the first accounting server and if it
doesn’t get a response from the accounting server then it tries the
second accounting server.

Mode

The Switch supports two modes of recording login events. Select:
•
•

Method

start-stop - to have the Switch send information to the accounting
server when a user begins a session, during a user’s session (if it
lasts past the Update Period), and when a user ends a session.
stop-only - to have the Switch send information to the accounting
server only when a user ends a session.

Select whether you want to use RADIUS or TACACS+ for accounting of
specific types of events.
TACACS+ is the only method for recording Commands type of event.

Privilege

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This field is only configurable for Commands type of event. Select the
threshold command privilege level for which the Switch should send
accounting information. The Switch will send accounting information
when commands at the level you specify and higher are executed on the
Switch.

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Table 68 Advanced Application > AAA > AAA Setup (continued)
LABEL

DESCRIPTION

Apply

Click Apply to save your changes to the Switch’s run-time memory. The
Switch loses these changes if it is turned off or loses power, so use the
Save link on the top navigation panel to save your changes to the nonvolatile memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

25.2.4 Vendor Specific Attribute
RFC 2865 standard specifies a method for sending vendor-specific information
between a RADIUS server and a network access device (for example, the Switch).
A company can create Vendor Specific Attributes (VSAs) to expand the
functionality of a RADIUS server.
The Switch supports VSAs that allow you to perform the following actions based
on user authentication:
• Limit bandwidth on incoming or outgoing traffic for the port the user connects
to.
• Assign account privilege levels (See the CLI Reference Guide for more
information on account privilege levels) for the authenticated user.
The VSAs are composed of the following:
• Vendor-ID: An identification number assigned to the company by the IANA
(Internet Assigned Numbers Authority). ZyXEL’s vendor ID is 890.
• Vendor-Type: A vendor specified attribute, identifying the setting you want to
modify.
• Vendor-data: A value you want to assign to the setting.

Note: Refer to the documentation that comes with your RADIUS server on how to
configure VSAs for users authenticating via the RADIUS server.
The following table describes the VSAs supported on the Switch. Note that these
atrributes only work when you enable authorization (see Section 25.2.3 on page
221).

Table 69 Supported VSAs

224

FUNCTION

ATTRIBUTE

Ingress Bandwidth
Assignment

Vendor-Id = 890
Vendor-Type = 1
Vendor-data = ingress rate (Kbps in decimal format)

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Table 69 Supported VSAs
FUNCTION

ATTRIBUTE

Egress Bandwidth
Assignment

Vendor-Id = 890
Vendor-Type = 2
Vendor-data = egress rate (Kbps in decimal format)

Privilege
Assignment

Vendor-ID = 890
Vendor-Type = 3
Vendor-Data = "shell:priv-lvl=N"
or
Vendor-ID = 9 (CISCO)
Vendor-Type = 1 (CISCO-AVPAIR)
Vendor-Data = "shell:priv-lvl=N"
where N is a privilege level (from 0 to 14).

Note: If you set the privilege level of a login account differently
on the RADIUS server(s) and the Switch, the user is
assigned a privilege level from the database (RADIUS or
local) the Switch uses first for user authentication.

25.2.5 Tunnel Protocol Attribute
You can configure tunnel protocol attributes on the RADIUS server (refer to your
RADIUS server documentation) to assign a port on the Switch to a VLAN based on
IEEE 802.1x authentication. The port VLAN settings are fixed and untagged. This
will also set the port’s VID. The following table describes the values you need to
configure. Note that these atrributes only work when you enable authorization
(see Section 25.2.3 on page 221).

Table 70 Supported Tunnel Protocol Attribute
FUNCTION

ATTRIBUTE

VLAN Assignment

Tunnel-Type = VLAN(13)
Tunnel-Medium-Type = 802(6)
Tunnel-Private-Group-ID = VLAN ID

Note: You must also create a VLAN with the specified VID on
the Switch.
Note: The bolded values in this table are fixed values as defined
in RFC 3580.

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25.3 Supported RADIUS Attributes
Remote Authentication Dial-In User Service (RADIUS) attributes are data used to
define specific authentication, and accounting elements in a user profile, which is
stored on the RADIUS server. This section lists the RADIUS attributes supported
by the Switch.
Refer to RFC 2865 for more information about RADIUS attributes used for
authentication. Refer to RFC 2866 and RFC 2869 for RADIUS attributes used for
accounting.
This section lists the attributes used by authentication and accounting functions on
the Switch. In cases where the attribute has a specific format associated with it,
the format is specified.

25.3.1 Attributes Used for Authentication
The following sections list the attributes sent from the Switch to the RADIUS
server when performing authentication.

25.3.1.1 Attributes Used for Authenticating Privilege Access
User-Name
- the format of the User-Name attribute is $enab#$, where # is the privilege
level (1-14)
User-Password
NAS-Identifier
NAS-IP-Address

25.3.1.2 Attributes Used to Login Users
User-Name
User-Password
NAS-Identifier
NAS-IP-Address

25.3.1.3 Attributes Used by the IEEE 802.1x Authentication
User-Name
NAS-Identifier
NAS-IP-Address
NAS-Port
NAS-Port-Type

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- This value is set to Ethernet(15) on the Switch.
Calling-Station-Id
Frame-MTU
EAP-Message
State
Message-Authenticator

25.3.2 Attributes Used for Accounting
The following sections list the attributes sent from the Switch to the RADIUS
server when performing authentication.

25.3.2.1 Attributes Used for Accounting System Events
NAS-IP-Address
NAS-Identifier
Acct-Status-Type
Acct-Session-ID
- The format of Acct-Session-Id is date+time+8-digit sequential number,
for example, 2007041917210300000001. (date: 2007/04/19, time:
17:21:03, serial number: 00000001)
Acct-Delay-Time

25.3.2.2 Attributes Used for Accounting Exec Events
The attributes are listed in the following table along with the time that they are
sent (the difference between Console and Telnet/SSH Exec events is that the
Telnet/SSH events utilize the Calling-Station-Id attribute):

Table 71 RADIUS Attributes - Exec Events via Console
ATTRIBUTE

START

INTERIM-UPDATE

STOP

User-Name

D

D

D

NAS-Identifier

D

D

D

NAS-IP-Address

D

D

D

Service-Type

D

D

D

Acct-Status-Type

D

D

D

Acct-Delay-Time

D

D

D

Acct-Session-Id

D

D

D

Acct-Authentic

D

D

D

D

D

Acct-Session-Time
Acct-Terminate-Cause

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Table 72 RADIUS Attributes - Exec Events via Telnet/SSH
ATTRIBUTE

START

INTERIM-UPDATE

STOP

User-Name

D

D

D

NAS-Identifier

D

D

D

NAS-IP-Address

D

D

D

Service-Type

D

D

D

Calling-Station-Id

D

D

D

Acct-Status-Type

D

D

D

Acct-Delay-Time

D

D

D

Acct-Session-Id

D

D

D

Acct-Authentic

D

D

D

D

D

Acct-Session-Time
Acct-Terminate-Cause

D

25.3.2.3 Attributes Used for Accounting IEEE 802.1x Events
The attributes are listed in the following table along with the time of the session
they are sent:

Table 73 RADIUS Attributes - Exec Events via Console
ATTRIBUTE

START

INTERIM-UPDATE

STOP

User-Name

D

D

D

NAS-IP-Address

D

D

D

NAS-Port

D

D

D

Class

D

D

D

Called-Station-Id

D

D

D

Calling-Station-Id

D

D

D

NAS-Identifier

D

D

D

NAS-Port-Type

D

D

D

Acct-Status-Type

D

D

D

Acct-Delay-Time

D

D

D

Acct-Session-Id

D

D

D

Acct-Authentic

D

D

D

Acct-Input-Octets

D

D

Acct-Output-Octets

D

D

Acct-Session-Time

D

D

Acct-Input-Packets

D

D

Acct-Output-Packets

D

D

Acct-Terminate-Cause

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Table 73 RADIUS Attributes - Exec Events via Console
ATTRIBUTE

INTERIM-UPDATE

STOP

Acct-Input-Gigawords

D

D

Acct-OutputGigawords

D

D

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CHAPTER

26

IP Source Guard
Use IP source guard to filter unauthorized DHCP and ARP packets in your network.

26.1 IP Source Guard Overview
IP source guard uses a binding table to distinguish between authorized and
unauthorized DHCP and ARP packets in your network. A binding contains these
key attributes:
• MAC address
• VLAN ID
• IP address
• Port number
When the Switch receives a DHCP or ARP packet, it looks up the appropriate MAC
address, VLAN ID, IP address, and port number in the binding table. If there is a
binding, the Switch forwards the packet. If there is not a binding, the Switch
discards the packet.
The Switch builds the binding table by snooping DHCP packets (dynamic bindings)
and from information provided manually by administrators (static bindings).
IP source guard consists of the following features:
• Static bindings. Use this to create static bindings in the binding table.
• DHCP snooping. Use this to filter unauthorized DHCP packets on the network
and to build the binding table dynamically.
• ARP inspection. Use this to filter unauthorized ARP packets on the network.
If you want to use dynamic bindings to filter unauthorized ARP packets (typical
implementation), you have to enable DHCP snooping before you enable ARP
inspection.

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26.1.1 DHCP Snooping Overview
Use DHCP snooping to filter unauthorized DHCP packets on the network and to
build the binding table dynamically. This can prevent clients from getting IP
addresses from unauthorized DHCP servers.

26.1.1.1 Trusted vs. Untrusted Ports
Every port is either a trusted port or an untrusted port for DHCP snooping. This
setting is independent of the trusted/untrusted setting for ARP inspection. You can
also specify the maximum number for DHCP packets that each port (trusted or
untrusted) can receive each second.
Trusted ports are connected to DHCP servers or other switches. The Switch
discards DHCP packets from trusted ports only if the rate at which DHCP packets
arrive is too high. The Switch learns dynamic bindings from trusted ports.

Note: The Switch will drop all DHCP requests if you enable DHCP snooping and there
are no trusted ports.
Untrusted ports are connected to subscribers. The Switch discards DHCP packets
from untrusted ports in the following situations:
• The packet is a DHCP server packet (for example, OFFER, ACK, or NACK).
• The source MAC address and source IP address in the packet do not match any
of the current bindings.
• The packet is a RELEASE or DECLINE packet, and the source MAC address and
source port do not match any of the current bindings.
• The rate at which DHCP packets arrive is too high.

26.1.1.2 DHCP Snooping Database
The Switch stores the binding table in volatile memory. If the Switch restarts, it
loads static bindings from permanent memory but loses the dynamic bindings, in
which case the devices in the network have to send DHCP requests again. As a
result, it is recommended you configure the DHCP snooping database.
The DHCP snooping database maintains the dynamic bindings for DHCP snooping
and ARP inspection in a file on an external TFTP server. If you set up the DHCP
snooping database, the Switch can reload the dynamic bindings from the DHCP
snooping database after the Switch restarts.

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You can configure the name and location of the file on the external TFTP server.
The file has the following format:

Figure 119 DHCP Snooping Database File Format

TYPE DHCP-SNOOPING
VERSION 1
BEGIN
 
 
...
...
 
END

The  helps distinguish between the bindings in the latest
update and the bindings from previous updates. Each binding consists of 72 bytes,
a space, and another checksum that is used to validate the binding when it is
read. If the calculated checksum is not equal to the checksum in the file, that
binding and all others after it are ignored.

26.1.1.3 DHCP Relay Option 82 Information
The Switch can add information to DHCP requests that it does not discard. This
provides the DHCP server more information about the source of the requests. The
Switch can add the following information:
• Slot ID (1 byte), port ID (1 byte), and source VLAN ID (2 bytes)
• System name (up to 32 bytes)
This information is stored in an Agent Information field in the option 82 field of the
DHCP headers of client DHCP request frames. See Chapter 37 on page 307 for
more information about DHCP relay option 82.
When the DHCP server responds, the Switch removes the information in the Agent
Information field before forwarding the response to the original source.
You can configure this setting for each source VLAN. This setting is independent of
the DHCP relay settings (Chapter 37 on page 307).

26.1.1.4 Configuring DHCP Snooping
Follow these steps to configure DHCP snooping on the Switch.
1

Enable DHCP snooping on the Switch.

2

Enable DHCP snooping on each VLAN, and configure DHCP relay option 82.

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3

Configure trusted and untrusted ports, and specify the maximum number of DHCP
packets that each port can receive per second.

4

Configure static bindings.

26.1.2 ARP Inspection Overview
Use ARP inspection to filter unauthorized ARP packets on the network. This can
prevent many kinds of man-in-the-middle attacks, such as the one in the following
example.

Figure 120 Example: Man-in-the-middle Attack

A

B

X

In this example, computer B tries to establish a connection with computer A.
Computer X is in the same broadcast domain as computer A and intercepts the
ARP request for computer A. Then, computer X does the following things:
• It pretends to be computer A and responds to computer B.
• It pretends to be computer B and sends a message to computer A.
As a result, all the communication between computer A and computer B passes
through computer X. Computer X can read and alter the information passed
between them.

26.1.2.1 ARP Inspection and MAC Address Filters
When the Switch identifies an unauthorized ARP packet, it automatically creates a
MAC address filter to block traffic from the source MAC address and source VLAN
ID of the unauthorized ARP packet. You can configure how long the MAC address
filter remains in the Switch.
These MAC address filters are different than regular MAC address filters (Chapter
12 on page 123).
• They are stored only in volatile memory.
• They do not use the same space in memory that regular MAC address filters
use.

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• They appear only in the ARP Inspection screens and commands, not in the
MAC Address Filter screens and commands.

26.1.2.2 Trusted vs. Untrusted Ports
Every port is either a trusted port or an untrusted port for ARP inspection. This
setting is independent of the trusted/untrusted setting for DHCP snooping. You
can also specify the maximum rate at which the Switch receives ARP packets on
untrusted ports.
The Switch does not discard ARP packets on trusted ports for any reason.
The Switch discards ARP packets on untrusted ports in the following situations:
• The sender’s information in the ARP packet does not match any of the current
bindings.
• The rate at which ARP packets arrive is too high.

26.1.2.3 Syslog
The Switch can send syslog messages to the specified syslog server (Chapter 42
on page 359) when it forwards or discards ARP packets. The Switch can
consolidate log messages and send log messages in batches to make this
mechanism more efficient.

26.1.2.4 Configuring ARP Inspection
Follow these steps to configure ARP inspection on the Switch.
1

Configure DHCP snooping. See Section 26.1.1.4 on page 233.

Note: It is recommended you enable DHCP snooping at least one day before you
enable ARP inspection so that the Switch has enough time to build the binding
table.
2

Enable ARP inspection on each VLAN.

3

Configure trusted and untrusted ports, and specify the maximum number of ARP
packets that each port can receive per second.

26.2 IP Source Guard
Use this screen to look at the current bindings for DHCP snooping and ARP
inspection. Bindings are used by DHCP snooping and ARP inspection to distinguish
between authorized and unauthorized packets in the network. The Switch learns

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the bindings by snooping DHCP packets (dynamic bindings) and from information
provided manually by administrators (static bindings). To open this screen, click
Advanced Application > IP Source Guard.

Figure 121 IP Source Guard

The following table describes the labels in this screen.

Table 74 IP Source Guard
LABEL

DESCRIPTION

Index

This field displays a sequential number for each binding.

MAC Address

This field displays the source MAC address in the binding.

IP Address

This field displays the IP address assigned to the MAC address in
the binding.

Lease

This field displays how many days, hours, minutes, and seconds
the binding is valid; for example, 2d3h4m5s means the binding
is still valid for 2 days, 3 hours, 4 minutes and 5 seconds. This
field displays infinity if the binding is always valid (for example,
a static binding).

Type

This field displays how the Switch learned the binding.
static: This binding was learned from information provided
manually by an administrator.
dhcp-snooping: This binding was learned by snooping DHCP
packets.

VID

This field displays the source VLAN ID in the binding.

Port

This field displays the port number in the binding. If this field is
blank, the binding applies to all ports.

26.3 IP Source Guard Static Binding
Use this screen to manage static bindings for DHCP snooping and ARP inspection.
Static bindings are uniquely identified by the MAC address and VLAN ID. Each MAC
address and VLAN ID can only be in one static binding. If you try to create a static
binding with the same MAC address and VLAN ID as an existing static binding, the

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new static binding replaces the original one. To open this screen, click Advanced
Application > IP Source Guard > Static Binding.

Figure 122 IP Source Guard Static Binding

The following table describes the labels in this screen.

Table 75 IP Source Guard Static Binding
LABEL

DESCRIPTION

MAC Address

Enter the source MAC address in the binding.

IP Address

Enter the IP address assigned to the MAC address in the binding.

VLAN

Enter the source VLAN ID in the binding.

Port

Specify the port(s) in the binding. If this binding has one port,
select the first radio button and enter the port number in the field
to the right. If this binding applies to all ports, select Any.

Add

Click this to create the specified static binding or to update an
existing one.

Cancel

Click this to reset the values above based on the last selected
static binding or, if not applicable, to clear the fields above.

Clear

Click this to clear the fields above.

Index

This field displays a sequential number for each binding.

MAC Address

This field displays the source MAC address in the binding.

IP Address

This field displays the IP address assigned to the MAC address in
the binding.

Lease

This field displays how long the binding is valid.

Type

This field displays how the Switch learned the binding.
static: This binding was learned from information provided
manually by an administrator.

VLAN

This field displays the source VLAN ID in the binding.

Port

This field displays the port number in the binding. If this field is
blank, the binding applies to all ports.

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Table 75 IP Source Guard Static Binding (continued)
LABEL

DESCRIPTION

Delete

Select this, and click Delete to remove the specified entry.

Cancel

Click this to clear the Delete check boxes above.

26.4 DHCP Snooping
Use this screen to look at various statistics about the DHCP snooping database. To
open this screen, click Advanced Application > IP Source Guard > DHCP
Snooping.

Figure 123 DHCP Snooping

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The following table describes the labels in this screen.

Table 76 DHCP Snooping
LABEL

DESCRIPTION

Database Status
This section displays the current settings for the DHCP snooping
database. You can configure them in the DHCP Snooping
Configure screen. See Section 26.5 on page 241.
Agent URL

This field displays the location of the DHCP snooping database.

Write delay timer

This field displays how long (in seconds) the Switch tries to
complete a specific update in the DHCP snooping database before
it gives up.

Abort timer

This field displays how long (in seconds) the Switch waits to
update the DHCP snooping database after the current bindings
change.
This section displays information about the current update and
the next update of the DHCP snooping database.

Agent running

This field displays the status of the current update or access of
the DHCP snooping database.
none: The Switch is not accessing the DHCP snooping database.
read: The Switch is loading dynamic bindings from the DHCP
snooping database.
write: The Switch is updating the DHCP snooping database.

Delay timer expiry

This field displays how much longer (in seconds) the Switch tries
to complete the current update before it gives up. It displays Not
Running if the Switch is not updating the DHCP snooping
database right now.

Abort timer expiry

This field displays when (in seconds) the Switch is going to update
the DHCP snooping database again. It displays Not Running if
the current bindings have not changed since the last update.
This section displays information about the last time the Switch
updated the DHCP snooping database.

Last succeeded time

This field displays the last time the Switch updated the DHCP
snooping database successfully.

Last failed time

This field displays the last time the Switch updated the DHCP
snooping database unsuccessfully.

Last failed reason

This field displays the reason the Switch updated the DHCP
snooping database unsuccessfully.
This section displays historical information about the number of
times the Switch successfully or unsuccessfully read or updated
the DHCP snooping database.

Total attempts

This field displays the number of times the Switch has tried to
access the DHCP snooping database for any reason.

Startup failures

This field displays the number of times the Switch could not
create or read the DHCP snooping database when the Switch
started up or a new URL is configured for the DHCP snooping
database.

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Table 76 DHCP Snooping (continued)
LABEL

DESCRIPTION

Successful transfers

This field displays the number of times the Switch read bindings
from or updated the bindings in the DHCP snooping database
successfully.

Failed transfers

This field displays the number of times the Switch was unable to
read bindings from or update the bindings in the DHCP snooping
database.

Successful reads

This field displays the number of times the Switch read bindings
from the DHCP snooping database successfully.

Failed reads

This field displays the number of times the Switch was unable to
read bindings from the DHCP snooping database.

Successful writes

This field displays the number of times the Switch updated the
bindings in the DHCP snooping database successfully.

Failed writes

This field displays the number of times the Switch was unable to
update the bindings in the DHCP snooping database.

Database detail

240

First successful
access

This field displays the first time the Switch accessed the DHCP
snooping database for any reason.

Last ignored bindings
counters

This section displays the number of times and the reasons the
Switch ignored bindings the last time it read bindings from the
DHCP binding database. You can clear these counters by
restarting the Switch or using CLI commands. See the Ethernet
Switch CLI Reference Guide.

Binding collisions

This field displays the number of bindings the Switch ignored
because the Switch already had a binding with the same MAC
address and VLAN ID.

Invalid interfaces

This field displays the number of bindings the Switch ignored
because the port number was a trusted interface or does not exist
anymore.

Parse failures

This field displays the number of bindings the Switch ignored
because the Switch was unable to understand the binding in the
DHCP binding database.

Expired leases

This field displays the number of bindings the Switch ignored
because the lease time had already expired.

Unsupported vlans

This field displays the number of bindings the Switch ignored
because the VLAN ID does not exist anymore.

Last ignored time

This field displays the last time the Switch ignored any bindings
for any reason from the DHCP binding database.

Total ignored bindings
counters

This section displays the reasons the Switch has ignored bindings
any time it read bindings from the DHCP binding database. You
can clear these counters by restarting the Switch or using CLI
commands. See the Ethernet Switch CLI Reference Guide.

Binding collisions

This field displays the number of bindings the Switch has ignored
because the Switch already had a binding with the same MAC
address and VLAN ID.

Invalid interfaces

This field displays the number of bindings the Switch has ignored
because the port number was a trusted interface or does not exist
anymore.

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Table 76 DHCP Snooping (continued)
LABEL

DESCRIPTION

Parse failures

This field displays the number of bindings the Switch has ignored
because the Switch was unable to understand the binding in the
DHCP binding database.

Expired leases

This field displays the number of bindings the Switch has ignored
because the lease time had already expired.

Unsupported vlans

This field displays the number of bindings the Switch has ignored
because the VLAN ID does not exist anymore.

26.5 DHCP Snooping Configure
Use this screen to enable DHCP snooping on the Switch (not on specific VLAN),
specify the VLAN where the default DHCP server is located, and configure the
DHCP snooping database. The DHCP snooping database stores the current
bindings on a secure, external TFTP server so that they are still available after a
restart. To open this screen, click Advanced Application > IP Source Guard >
DHCP Snooping > Configure.

Figure 124 DHCP Snooping Configure

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The following table describes the labels in this screen.

Table 77 DHCP Snooping Configure
LABEL

DESCRIPTION

Active

Select this to enable DHCP snooping on the Switch. You still have to
enable DHCP snooping on specific VLAN and specify trusted ports.

Note: The Switch will drop all DHCP requests if you enable DHCP
snooping and there are no trusted ports.
DHCP Vlan

Select a VLAN ID if you want the Switch to forward DHCP packets to
DHCP servers on a specific VLAN.

Note: You have to enable DHCP snooping on the DHCP VLAN
too.
You can enable Option82 in the DHCP Snooping VLAN Configure
screen (Section 26.5.2 on page 244) to help the DHCP servers
distinguish between DHCP requests from different VLAN.
Select Disable if you do not want the Switch to forward DHCP packets
to a specific VLAN.
Database

If Timeout interval is greater than Write delay interval, it is
possible that the next update is scheduled to occur before the current
update has finished successfully or timed out. In this case, the Switch
waits to start the next update until it completes the current one.

Agent URL

Enter the location of the DHCP snooping database. The location should
be expressed like this: tftp://{domain name or IP address}/
directory, if applicable/file name; for example, tftp://
192.168.10.1/database.txt.

Timeout
interval

Enter how long (10-65535 seconds) the Switch tries to complete a
specific update in the DHCP snooping database before it gives up.

Write delay
interval

Enter how long (10-65535 seconds) the Switch waits to update the
DHCP snooping database the first time the current bindings change
after an update. Once the next update is scheduled, additional
changes in current bindings are automatically included in the next
update.

Renew DHCP
Snooping URL

Enter the location of a DHCP snooping database, and click Renew if
you want the Switch to load it. You can use this to load dynamic
bindings from a different DHCP snooping database than the one
specified in Agent URL.
When the Switch loads dynamic bindings from a DHCP snooping
database, it does not discard the current dynamic bindings first. If
there is a conflict, the Switch keeps the dynamic binding in volatile
memory and updates the Binding collisions counter in the DHCP
Snooping screen (Section 26.4 on page 238).

242

Apply

Click Apply to save your changes to the Switch’s run-time memory.
The Switch loses these changes if it is turned off or loses power, so
use the Save link on the top navigation panel to save your changes to
the non-volatile memory when you are done configuring.

Cancel

Click this to reset the values in this screen to their last-saved values.

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26.5.1 DHCP Snooping Port Configure
Use this screen to specify whether ports are trusted or untrusted ports for DHCP
snooping.

Note: The Switch will drop all DHCP requests if you enable DHCP snooping and there
are no trusted ports.
You can also specify the maximum number for DHCP packets that each port
(trusted or untrusted) can receive each second. To open this screen, click
Advanced Application > IP Source Guard > DHCP Snooping > Configure >
Port.

Figure 125 DHCP Snooping Port Configure

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The following table describes the labels in this screen.

Table 78 DHCP Snooping Port Configure
LABEL

DESCRIPTION

Port

This field displays the port number. If you configure the * port,
the settings are applied to all of the ports.

Server Trusted state

Select whether this port is a trusted port (Trusted) or an
untrusted port (Untrusted).
Trusted ports are connected to DHCP servers or other switches,
and the Switch discards DHCP packets from trusted ports only if
the rate at which DHCP packets arrive is too high.
Untrusted ports are connected to subscribers, and the Switch
discards DHCP packets from untrusted ports in the following
situations:
•
•
•
•

The packet is a DHCP server packet (for example, OFFER, ACK,
or NACK).
The source MAC address and source IP address in the packet
do not match any of the current bindings.
The packet is a RELEASE or DECLINE packet, and the source
MAC address and source port do not match any of the current
bindings.
The rate at which DHCP packets arrive is too high.

Rate (pps)

Specify the maximum number for DHCP packets (1-2048) that
the Switch receives from each port each second. The Switch
discards any additional DHCP packets. Enter 0 to disable this limit,
which is recommended for trusted ports.

Apply

Click Apply to save your changes to the Switch’s run-time
memory. The Switch loses these changes if it is turned off or loses
power, so use the Save link on the top navigation panel to save
your changes to the non-volatile memory when you are done
configuring.

Cancel

Click this to reset the values in this screen to their last-saved
values.

26.5.2 DHCP Snooping VLAN Configure
Use this screen to enable DHCP snooping on each VLAN and to specify whether or
not the Switch adds DHCP relay agent option 82 information (Chapter 37 on page
307) to DHCP requests that the Switch relays to a DHCP server for each VLAN. To

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open this screen, click Advanced Application > IP Source Guard > DHCP
Snooping > Configure > VLAN.

Figure 126 DHCP Snooping VLAN Configure

The following table describes the labels in this screen.

Table 79 DHCP Snooping VLAN Configure
LABEL

DESCRIPTION

Show VLAN

Use this section to specify the VLANs you want to manage in the
section below.

Start VID

Enter the lowest VLAN ID you want to manage in the section
below.

End VID

Enter the highest VLAN ID you want to manage in the section
below.

Apply

Click this to display the specified range of VLANs in the section
below.

VID

This field displays the VLAN ID of each VLAN in the range
specified above. If you configure the * VLAN, the settings are
applied to all VLANs.

Enabled

Select Yes to enable DHCP snooping on the VLAN. You still have
to enable DHCP snooping on the Switch and specify trusted ports.

Note: The Switch will drop all DHCP requests if you enable
DHCP snooping and there are no trusted ports.
Option82

Select this to have the Switch add the slot number, port number
and VLAN ID to DHCP requests that it broadcasts to the DHCP
VLAN, if specified, or VLAN. You can specify the DHCP VLAN in the
DHCP Snooping Configure screen. See Section 26.5 on page
241.

Information

Select this to have the Switch add the system name to DHCP
requests that it broadcasts to the DHCP VLAN, if specified, or
VLAN. You can configure the system name in the General Setup
screen. See Chapter 8 on page 77. You can specify the DHCP
VLAN in the DHCP Snooping Configure screen. See Section
26.5 on page 241.

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Table 79 DHCP Snooping VLAN Configure (continued)
LABEL

DESCRIPTION

Apply

Click Apply to save your changes to the Switch’s run-time
memory. The Switch loses these changes if it is turned off or loses
power, so use the Save link on the top navigation panel to save
your changes to the non-volatile memory when you are done
configuring.

Cancel

Click this to reset the values in this screen to their last-saved
values.

26.6 ARP Inspection Status
Use this screen to look at the current list of MAC address filters that were created
because the Switch identified an unauthorized ARP packet. When the Switch
identifies an unauthorized ARP packet, it automatically creates a MAC address
filter to block traffic from the source MAC address and source VLAN ID of the
unauthorized ARP packet. To open this screen, click Advanced Application > IP
Source Guard > ARP Inspection.

Figure 127 ARP Inspection Status

The following table describes the labels in this screen.

Table 80 ARP Inspection Status
LABEL

DESCRIPTION

Total number of filters This field displays the current number of MAC address filters that
were created because the Switch identified unauthorized ARP
packets.

246

Index

This field displays a sequential number for each MAC address
filter.

MAC Address

This field displays the source MAC address in the MAC address
filter.

VID

This field displays the source VLAN ID in the MAC address filter.

Port

This field displays the source port of the discarded ARP packet.

Expiry (sec)

This field displays how long (in seconds) the MAC address filter
remains in the Switch. You can also delete the record manually
(Delete).

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Table 80 ARP Inspection Status (continued)
LABEL

DESCRIPTION

Reason

This field displays the reason the ARP packet was discarded.
MAC+VLAN: The MAC address and VLAN ID were not in the
binding table.
IP: The MAC address and VLAN ID were in the binding table, but
the IP address was not valid.
Port: The MAC address, VLAN ID, and IP address were in the
binding table, but the port number was not valid.

Delete

Select this and click Delete to remove the specified entry.

Delete

Click this to remove the selected entries.

Cancel

Click this to clear the Delete check boxes above.

26.6.1 ARP Inspection VLAN Status
Use this screen to look at various statistics about ARP packets in each VLAN. To
open this screen, click Advanced Application > IP Source Guard > ARP
Inspection > VLAN Status.

Figure 128 ARP Inspection VLAN Status

The following table describes the labels in this screen.

Table 81 ARP Inspection VLAN Status
LABEL

DESCRIPTION

Show VLAN range

Use this section to specify the VLANs you want to look at in the
section below.

Enabled VLAN

Select this to look at all the VLANs on which ARP inspection is
enabled in the section below.

Selected VLAN

Select this to look at all the VLANs in a specific range in the
section below. Then, enter the lowest VLAN ID (Start VID) and
the highest VLAN ID (End VID) you want to look at.

Apply

Click this to display the specified range of VLANs in the section
below.

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Table 81 ARP Inspection VLAN Status
LABEL

DESCRIPTION

VID

This field displays the VLAN ID of each VLAN in the range specified
above.

Received

This field displays the total number of ARP packets received from
the VLAN since the Switch last restarted.

Request

This field displays the total number of ARP Request packets
received from the VLAN since the Switch last restarted.

Reply

This field displays the total number of ARP Reply packets received
from the VLAN since the Switch last restarted.

Forwarded

This field displays the total number of ARP packets the Switch
forwarded for the VLAN since the Switch last restarted.

Dropped

This field displays the total number of ARP packets the Switch
discarded for the VLAN since the Switch last restarted.

26.6.2 ARP Inspection Log Status
Use this screen to look at log messages that were generated by ARP packets and
that have not been sent to the syslog server yet. To open this screen, click
Advanced Application > IP Source Guard > ARP Inspection > Log Status.

Figure 129 ARP Inspection Log Status

The following table describes the labels in this screen.

Table 82 ARP Inspection Log Status

248

LABEL

DESCRIPTION

Clearing log status
table

Click Apply to remove all the log messages that were generated
by ARP packets and that have not been sent to the syslog server
yet.

Total number of logs

This field displays the number of log messages that were
generated by ARP packets and that have not been sent to the
syslog server yet. If one or more log messages are dropped due
to unavailable buffer, there is an entry called overflow with the
current number of dropped log messages.

Index

This field displays a sequential number for each log message.

Port

This field displays the source port of the ARP packet.

VID

This field displays the source VLAN ID of the ARP packet.

Sender Mac

This field displays the source MAC address of the ARP packet.

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Table 82 ARP Inspection Log Status (continued)
LABEL

DESCRIPTION

Sender IP

This field displays the source IP address of the ARP packet.

Num Pkts

This field displays the number of ARP packets that were
consolidated into this log message. The Switch consolidates
identical log messages generated by ARP packets in the log
consolidation interval into one log message. You can configure
this interval in the ARP Inspection Configure screen. See
Section 26.7 on page 249.

Reason

This field displays the reason the log message was generated.
dhcp deny: An ARP packet was discarded because it violated a
dynamic binding with the same MAC address and VLAN ID.
static deny: An ARP packet was discarded because it violated a
static binding with the same MAC address and VLAN ID.
deny: An ARP packet was discarded because there were no
bindings with the same MAC address and VLAN ID.
dhcp permit: An ARP packet was forwarded because it matched
a dynamic binding.
static permit: An ARP packet was forwarded because it matched
a static binding.
In the ARP Inspection VLAN Configure screen, you can
configure the Switch to generate log messages when ARP packets
are discarded or forwarded based on the VLAN ID of the ARP
packet. See Section 26.7.2 on page 253.

Time

This field displays when the log message was generated.

26.7 ARP Inspection Configure
Use this screen to enable ARP inspection on the Switch. You can also configure the
length of time the Switch stores records of discarded ARP packets and global

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settings for the ARP inspection log. To open this screen, click Advanced
Application > IP Source Guard > ARP Inspection > Configure.

Figure 130 ARP Inspection Configure

The following table describes the labels in this screen.

Table 83 ARP Inspection Configure
LABEL

DESCRIPTION

Active

Select this to enable ARP inspection on the Switch. You still have
to enable ARP inspection on specific VLAN and specify trusted
ports.

Filter Aging Time
Filter aging time

This setting has no effect on existing MAC address filters.
Enter how long (1-2147483647 seconds) the MAC address filter
remains in the Switch after the Switch identifies an unauthorized
ARP packet. The Switch automatically deletes the MAC address
filter afterwards. Type 0 if you want the MAC address filter to be
permanent.

Log Profile
Log buffer size

Enter the maximum number (1-1024) of log messages that were
generated by ARP packets and have not been sent to the syslog
server yet. Make sure this number is appropriate for the specified
Syslog rate and Log interval.
If the number of log messages in the Switch exceeds this number,
the Switch stops recording log messages and simply starts
counting the number of entries that were dropped due to
unavailable buffer. Click Clearing log status table in the ARP
Inspection Log Status screen to clear the log and reset this
counter. See Section 26.6.2 on page 248.

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Table 83 ARP Inspection Configure (continued)
LABEL
Syslog rate

DESCRIPTION
Type the maximum number of syslog messages the Switch can
send to the syslog server in one batch. This number is expressed
as a rate because the batch frequency is determined by the Log
Interval. You must configure the syslog server (Chapter 42 on
page 359) to use this. Enter 0 if you do not want the Switch to
send log messages generated by ARP packets to the syslog server.
The relationship between Syslog rate and Log interval is
illustrated in the following examples:
•
•

Log interval

4 invalid ARP packets per second, Syslog rate is 5, Log
interval is 1: the Switch sends 4 syslog messages every
second.
6 invalid ARP packets per second, Syslog rate is 5, Log
interval is 2: the Switch sends 5 syslog messages every 2
seconds.

Type how often (1-86400 seconds) the Switch sends a batch of
syslog messages to the syslog server. Enter 0 if you want the
Switch to send syslog messages immediately. See Syslog rate
for an example of the relationship between Syslog rate and Log
interval.

Apply

Click Apply to save your changes to the Switch’s run-time
memory. The Switch loses these changes if it is turned off or loses
power, so use the Save link on the top navigation panel to save
your changes to the non-volatile memory when you are done
configuring.

Cancel

Click this to reset the values in this screen to their last-saved
values.

26.7.1 ARP Inspection Port Configure
Use this screen to specify whether ports are trusted or untrusted ports for ARP
inspection. You can also specify the maximum rate at which the Switch receives

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ARP packets on each untrusted port. To open this screen, click Advanced
Application > IP Source Guard > ARP Inspection > Configure > Port.

Figure 131 ARP Inspection Port Configure

The following table describes the labels in this screen.

Table 84 ARP Inspection Port Configure
LABEL

DESCRIPTION

Port

This field displays the port number. If you configure the * port,
the settings are applied to all of the ports.

Trusted State

Select whether this port is a trusted port (Trusted) or an
untrusted port (Untrusted).
The Switch does not discard ARP packets on trusted ports for any
reason.
The Switch discards ARP packets on untrusted ports in the
following situations:
•
•

252

The sender’s information in the ARP packet does not match
any of the current bindings.
The rate at which ARP packets arrive is too high. You can
specify the maximum rate at which ARP packets can arrive on
untrusted ports.

Limit

Rate and Burst Interval settings have no effect on trusted ports.

Rate (pps)

Specify the maximum rate (1-2048 packets per second) at which
the Switch receives ARP packets from each port. The Switch
discards any additional ARP packets. Enter 0 to disable this limit.

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Table 84 ARP Inspection Port Configure (continued)
LABEL

DESCRIPTION

Burst interval
(seconds)

The burst interval is the length of time over which the rate of ARP
packets is monitored for each port. For example, if the Rate is 15
pps and the burst interval is 1 second, then the Switch accepts a
maximum of 15 ARP packets in every one-second interval. If the
burst interval is 5 seconds, then the Switch accepts a maximum of
75 ARP packets in every five-second interval.

Enter the length (1-15 seconds) of the burst interval.
Apply

Click Apply to save your changes to the Switch’s run-time
memory. The Switch loses these changes if it is turned off or loses
power, so use the Save link on the top navigation panel to save
your changes to the non-volatile memory when you are done
configuring.

Cancel

Click this to reset the values in this screen to their last-saved
values.

26.7.2 ARP Inspection VLAN Configure
Use this screen to enable ARP inspection on each VLAN and to specify when the
Switch generates log messages for receiving ARP packets from each VLAN. To
open this screen, click Advanced Application > IP Source Guard > ARP
Inspection > Configure > VLAN.

Figure 132 ARP Inspection VLAN Configure

The following table describes the labels in this screen.

Table 85 ARP Inspection VLAN Configure
LABEL

DESCRIPTION

VLAN

Use this section to specify the VLANs you want to manage in the
section below.

Start VID

Enter the lowest VLAN ID you want to manage in the section
below.

End VID

Enter the highest VLAN ID you want to manage in the section
below.

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Table 85 ARP Inspection VLAN Configure (continued)
LABEL

DESCRIPTION

Apply

Click this to display the specified range of VLANs in the section
below.

VID

This field displays the VLAN ID of each VLAN in the range specified
above. If you configure the * VLAN, the settings are applied to all
VLANs.

Enabled

Select Yes to enable ARP inspection on the VLAN. Select No to
disable ARP inspection on the VLAN.

Log

Specify when the Switch generates log messages for receiving
ARP packets from the VLAN.
None: The Switch does not generate any log messages when it
receives an ARP packet from the VLAN.
Deny: The Switch generates log messages when it discards an
ARP packet from the VLAN.
Permit: The Switch generates log messages when it forwards an
ARP packet from the VLAN.
All: The Switch generates log messages every time it receives an
ARP packet from the VLAN.

254

Apply

Click Apply to save your changes to the Switch’s run-time
memory. The Switch loses these changes if it is turned off or loses
power, so use the Save link on the top navigation panel to save
your changes to the non-volatile memory when you are done
configuring.

Cancel

Click this to reset the values in this screen to their last-saved
values.

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27
Loop Guard

This chapter shows you how to configure the Switch to guard against loops on the
edge of your network.

27.1 Loop Guard Overview
Loop guard allows you to configure the Switch to shut down a port if it detects that
packets sent out on that port loop back to the Switch. While you can use Spanning
Tree Protocol (STP) to prevent loops in the core of your network. STP cannot
prevent loops that occur on the edge of your network.

Figure 133 Loop Guard vs STP
STP
Loop Guard

Loop guard is designed to handle loop problems on the edge of your network. This
can occur when a port is connected to a Switch that is in a loop state. Loop state
occurs as a result of human error. It happens when two ports on a switch are
connected with the same cable. When a switch in loop state sends out broadcast
messages the messages loop back to the switch and are re-broadcast again and
again causing a broadcast storm.
If a switch (not in loop state) connects to a switch in loop state, then it will be
affected by the switch in loop state in the following way:
• It will receive broadcast messages sent out from the switch in loop state.

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Chapter 27 Loop Guard
• It will receive its own broadcast messages that it sends out as they loop back. It
will then re-broadcast those messages again.
The following figure shows port N on switch A connected to switch B. Switch B is
in loop state. When broadcast or multicast packets leave port N and reach switch
B, they are sent back to port N on A as they are rebroadcast from B.

Figure 134 Switch in Loop State

B

A

N
The loop guard feature checks to see if a loop guard enabled port is connected to
a switch in loop state. This is accomplished by periodically sending a probe packet
and seeing if the packet returns on the same port. If this is the case, the Switch
will shut down the port connected to the switch in loop state.
The following figure shows a loop guard enabled port N on switch A sending a
probe packet P to switch B. Since switch B is in loop state, the probe packet P
returns to port N on A. The Switch then shuts down port N to ensure that the rest
of the network is not affected by the switch in loop state.

Figure 135 Loop Guard - Probe Packet

B

A

P
N

P

The Switch also shuts down port N if the probe packet returns to switch A on any
other port. In other words loop guard also protects against standard network
loops. The following figure illustrates three switches forming a loop. A sample path
of the loop guard probe packet is also shown. In this example, the probe packet is
sent from port N and returns on another port. As long as loop guard is enabled on

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port N. The Switch will shut down port N if it detects that the probe packet has
returned to the Switch.

Figure 136 Loop Guard - Network Loop

N
P

P

P

A

Note: After resolving the loop problem on your network you can re-activate the
disabled port via the web configurator (see Section 8.7 on page 89) or via
commands (see the Ethernet Switch CLI Reference Guide).

27.2 Loop Guard Setup
Click Advanced Application > Loop Guard in the navigation panel to display the
screen as shown.

Note: The loop guard feature can not be enabled on the ports that have Spanning
Tree Protocol (RSTP, MRSTP or MSTP) enabled.
Figure 137 Advanced Application > Loop Guard

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The following table describes the labels in this screen.

Table 86 Advanced Application > Loop Guard
LABEL

DESCRIPTION

Active

Select this option to enable loop guard on the Switch.
The Switch generates syslog, internal log messages as well as SNMP traps
when it shuts down a port via the loop guard feature.

Port

This field displays a port number.

*

Use this row to make the setting the same for all ports. Use this row first
and then make adjustments on a port-by-port basis.

Note: Changes in this row are copied to all the ports as soon as you
make them.
Active

Select this check box to enable the loop guard feature on this port. The
Switch sends probe packets from this port to check if the Switch it is
connected to is in loop state. If the Switch that this port is connected is in
loop state the Switch will shut down this port.
Clear this check box to disable the loop guard feature.

258

Apply

Click Apply to save your changes to the Switch’s run-time memory. The
Switch loses these changes if it is turned off or loses power, so use the
Save link on the top navigation panel to save your changes to the nonvolatile memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

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CHAPTER

28

VLAN Mapping
This chapter shows you how to configure VLAN mapping on the Switch.

28.1 VLAN Mapping Overview
With VLAN mapping enabled, the Switch can map the VLAN ID and priority level of
packets received from a private network to those used in the service provider’s
network.
The Switch checks incoming traffic from the switch ports (non-management ports)
against the VLAN mapping table first, the MAC learning table and then the VLAN
table before forwarding them through the Gigabit uplink port. When VLAN
mapping is enabled, the Switch discards the tagged packets that do not match an
entry in the VLAN mapping table. If the incoming packets are untagged, the
Switch adds a PVID based on the VLAN setting.

Note: You can not enable VLAN mapping and VLAN stacking at the same time.

28.1.1 VLAN Mapping Example
In the following example figure, packets that carry VLAN ID 12 and are received
on port 3 match a pre-configured VLAN mapping rule. The Switch translates the
VLAN ID from 12 into 123 before forwarding the packets. Any packets carrying a
VLAN tag other than 12 (such as 10) and received on port 3 will be dropped.

Figure 138 VLAN mapping example

123

Port 3

12
10

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Chapter 28 VLAN Mapping

28.2 Enabling VLAN Mapping
Click Advanced Application and then VLAN Mapping in the navigation panel to
display the screen as shown.

Figure 139 VLAN Mapping

The following table describes the labels in this screen.

Table 87 VLAN Mapping
LABEL

DESCRIPTION

Active

Select this option to enable VLAN mapping on the Switch.

Port

This field displays the port number.

*

Use this row to make the setting the same for all ports. Use this row first
and then make adjustments on a port-by-port basis.
Changes in this row are copied to all the ports as soon as you make them.

260

Active

Select this check box to enable the VLAN mapping feature on this port.
Clear this check box to disable the VLAN mapping feature.

Apply

Click Apply to save your changes to the Switch’s run-time memory. The
Switch loses these changes if it is turned off or loses power, so use the
Save link on the top navigation panel to save your changes to the nonvolatile memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

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Chapter 28 VLAN Mapping

28.3 Configuring VLAN Mapping
Click the VLAN Mapping Configure link in the VLAN Mapping screen to display
the screen as shown. Use this screen to enable and edit the VLAN mapping
rule(s).

Figure 140 VLAN Mapping Configuration

The following table describes the labels in this screen.

Table 88 VLAN Mapping Configuration
LABEL

DESCRIPTION

Active

Check this box to activate this rule.

Name

Enter a descriptive name (up to 32 printable ASCII characters) for
identification purposes.

Port

Type a port to be included in this rule.

VID

Enter a VLAN ID from 1 to 4094. This is the VLAN tag carried in the
packets and will be translated into the VID you specified in the
Translated VID field.

Translated VID

Enter a VLAN ID (from 1 to 4094) into which the customer VID carried in
the packets will be translated.

Priority

Select a priority level (from 0 to 7). This is the priority level that replaces
the customer priority level in the tagged packets or adds to the
untagged packets.

Add

Click Add to insert the entry in the summary table below and save your
changes to the Switch’s run-time memory. The Switch loses these
changes if it is turned off or loses power, so use the Save link on the top
navigation panel to save your changes to the non-volatile memory when
you are done configuring.

Cancel

Click Cancel to reset the fields to your previous configuration.

Index

This is the number of the VLAN mapping entry in the table.

Active

This shows whether this entry is activated or not.

Name

This is the descriptive name for this rule.

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Table 88 VLAN Mapping Configuration (continued)

262

LABEL

DESCRIPTION

Port

This is the port number to which this rule is applied.

VID

This is the customer VLAN ID in the incoming packets.

Translated VID

This is the VLAN ID that replaces the customer VLAN ID in the tagged
packets.

Priority

This is the priority level that replaces the customer priority level in the
tagged packets.

Delete

Check the rule(s) that you want to remove in the Delete column and
then click the Delete button.

Cancel

Click Cancel to clear the Delete check boxes.

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CHAPTER

29

Layer 2 Protocol Tunneling
This chapter shows you how to configure layer 2 protocol tunneling on the Switch.

29.1 Layer 2 Protocol Tunneling Overview
Layer 2 protocol tunneling (L2PT) is used on the service provider's edge devices.
L2PT allows edge switches (1 and 2 in the following figure) to tunnel layer 2 STP
(Spanning Tree Protocol), CDP (Cisco Discovery Protocol) and VTP (VLAN Trunking
Protocol) packets between customer switches (A, B and C in the following figure)
connected through the service provider’s network. The edge switch encapsulates
layer 2 protocol packets with a specific MAC address before sending them across
the service provider’s network to other edge switches.

Figure 141 Layer 2 Protocol Tunneling Network Scenario

A

CDP

C

Service Provider's
Network

STP

1

STP

2

CDP
VTP

VTP

B
In the following example, if you enable L2PT for STP, you can have switches A, B,
C and D in the same spanning tree, even though switch A is not directly
connected to switches B, C and D. Topology change information can be
propagated throughout the service provider’s network.
To emulate a point-to-point topology between two customer switches at different
sites, such as A and B, you can enable protocol tunneling on edge switches 1 and

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Chapter 29 Layer 2 Protocol Tunneling
2 for PAgP (Port Aggregation Protocol), LACP or UDLD (UniDirectional Link
Detection).

Figure 142 L2PT Network Example
B
A
STP

STP
STP

1

Service Provider's
Network

D
2
C

29.1.1 Layer 2 Protocol Tunneling Mode
Each port can have two layer 2 protocol tunneling modes, Access and Tunnel.
• The Access port is an ingress port on the service provider's edge device (1 or 2
in Figure 142 on page 264) and connected to a customer switch (A or B).
Incoming layer 2 protocol packets received on an access port are encapsulated
and forwarded to the tunnel ports.
• The Tunnel port is an egress port at the edge of the service provider's network
and connected to another service provider’s switch. Incoming encapsulated
layer 2 protocol packets received on a tunnel port are decapsulated and sent to
an access port.

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29.2 Configuring Layer 2 Protocol Tunneling
Click Advanced Application > Layer 2 Protocol Tunneling in the navigation
panel to display the screen as shown.

Figure 143 Advanced Application > Layer 2 Protocol Tunneling

The following table describes the labels in this screen.

Table 89 Advanced Application > Layer 2 Protocol Tunneling
LABEL

DESCRIPTION

Active

Select this to enable layer 2 protocol tunneling on the Switch.

Destination
MAC Address

Specify an MAC address with which the Switch uses to encapsulate the
layer 2 protocol packets by replacing the destination MAC address in the
packets.

Note: The MAC address can be either a unicast MAC address or
multicast MAC address. If you use a unicast MAC address,
make sure the MAC address does not exist in the address
table of a switch on the service provider’s network.
Note: All the edge switches in the service provider’s network should
be set to use the same MAC address for encapsulation.
Port

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This field displays the port number.

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Chapter 29 Layer 2 Protocol Tunneling

Table 89 Advanced Application > Layer 2 Protocol Tunneling (continued)
LABEL

DESCRIPTION

*

Use this row to make the setting the same for all ports. Use this row first
and then make adjustments on a port-by-port basis.

Note: Changes in this row are copied to all the ports as soon as you
make them.
CDP

Select this option to have the Switch tunnel CDP (Cisco Discovery
Protocol) packets so that other Cisco devices can be discovered through
the service provider’s network.

STP

Select this option to have the Switch tunnel STP (Spanning Tree Protocol)
packets so that STP can run properly across the service provider’s
network and spanning trees can be set up based on bridge information
from all (local and remote) networks.

VTP

Select this option to have the Switch tunnel VTP (VLAN Trunking Protocol)
packets so that all customer switches can use consistent VLAN
configuration through the service provider’s network.

Point to Point

The Switch supports PAgP (Port Aggregation Protocol), LACP (Link
Aggregation Control Protocol) and UDLD (UniDirectional Link Detection)
tunneling for a point-to-point topology.
Both PAgP and UDLD are Cisco’s proprietary data link layer protocols.
PAgP is similar to LACP and used to set up a logical aggregation of
Ethernet ports automatically. UDLD is to determine the link’s physical
status and detect a unidirectional link.

PAGP

Select this option to have the Switch send PAgP packets to a peer to
automatically negotiate and build a logical port aggregation.

LACP

Select this option to have the Switch send LACP packets to a peer to
dynamically creates and manages trunk groups.

UDLD

Select this option to have the Switch send UDLD packets to a peer’s port
it connected to monitor the physical status of a link.

Mode

Select Access to have the Switch encapsulate the incoming layer 2
protocol packets and forward them to the tunnel port(s). Select Access
for ingress ports at the edge of the service provider's network.

Note: You can enable L2PT services for STP, LACP, VTP, CDP,
UDLD, and PAGP on the access port(s) only.
Select Tunnel for egress ports at the edge of the service provider's
network. The Switch decapsulates the encapsulated layer 2 protocol
packets received on a tunnel port by changing the destination MAC
address to the original one, and then forward them to an access port. If
the service(s) is not enabled on an access port, the protocol packets are
dropped.

266

Apply

Click Apply to save your changes to the Switch’s run-time memory. The
Switch loses these changes if it is turned off or loses power, so use the
Save link on the top navigation panel to save your changes to the nonvolatile memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

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CHAPTER

30
Private VLAN

This chapter shows you how to configure the Switch to prevent communications
between ports in a VLAN.

30.1 Private VLAN Overview
Private VLAN allows you to do port isolation within a VLAN in a simple way. You
specify which port(s) in a VLAN is not isolated by adding it to the promiscuous port
list. The Switch automatically adds other ports in this VLAN to the isolated port list
and blocks traffic between the isolated ports. A promiscuous port can
communicate with any port in the same VLAN. An isolated port can communicate
with the promiscuous port(s) only.

Note: You can have up to one private VLAN rule for each VLAN.
Figure 144 Private VLAN Example

2

6

10

VLAN 123
Isolated ports: 2 ~ 6
Promiscuous port: 10
Note: Make sure you keep at least one port in the promiscuous port list for a VLAN
with private VLAN enabled. Otherwise, this VLAN is blocked from the whole
network.

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30.2 Configuring Private VLAN
Click Advanced Application > Private VLAN in the navigation panel to display
the screen as shown.

Figure 145 Advanced Application > Private VLAN

The following table describes the labels in this screen.

Table 90 Advanced Application > Private VLAN

268

LABEL

DESCRIPTION

Active

Check this box to enable private VLAN in a VLAN.

Name

Enter a descriptive name (up to 32 printable ASCII characters) for
identification purposes.

VLAN ID

Enter a VLAN ID from 1 to 4094. This is the VLAN to which this rule
applies.

Promiscuous
Ports

Enter the number of the port(s) that can communicate with any ports in
the same VLAN. Other ports belonging to this VLAN will be added to the
isolation list and can only send and receive traffic from the port(s) you
specify here.

Add

Click Add to insert the entry in the summary table below and save your
changes to the Switch’s run-time memory. The Switch loses these
changes if it is turned off or loses power, so use the Save link on the top
navigation panel to save your changes to the non-volatile memory when
you are done configuring.

Cancel

Click Cancel to reset the fields to your previous configuration.

Clear

Click Clear to clear the fields to the factory defaults.

Index

This is the index number of the rule.

Active

This shows whether this rule is activated or not.

Name

This is the descriptive name for this rule.

VLAN

This is the VLAN to which this rule is applied.

Promiscuous
Ports

This shows the port(s) that can communicate with any ports in the same
VLAN.

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Table 90 Advanced Application > Private VLAN (continued)
LABEL

DESCRIPTION

Delete

Check the rule(s) that you want to remove in the Delete column and
then click the Delete button.

Cancel

Click Cancel to clear the Delete check boxes.

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270

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P ART IV
IP Application
Static Route (273)
RIP (275)
OSPF (277)
IGMP (291)
DVMRP (295)
Differentiated Services (299)
DHCP (307)
VRRP (317)

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CHAPTER

31
Static Route

This chapter shows you how to configure static routes.

31.1 Configuring Static Routing
Static routes tell the Switch how to forward IP traffic when you configure the TCP/
IP parameters manually.
Click IP Application > Static Routing in the navigation panel to display the
screen as shown.

Figure 146 IP Application > Static Routing

The following table describes the related labels you use to create a static route.

Table 91 IP Application > Static Routing
LABEL

DESCRIPTION

Active

This field allows you to activate/deactivate this static route.

Name

Enter a descriptive name (up to 10 printable ASCII characters) for
identification purposes.

Destination
IP Address

This parameter specifies the IP network address of the final destination.
Routing is always based on network number. If you need to specify a route
to a single host, use a subnet mask of 255.255.255.255 in the subnet
mask field to force the network number to be identical to the host ID.

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Table 91 IP Application > Static Routing (continued)

274

LABEL

DESCRIPTION

IP Subnet
Mask

Enter the subnet mask for this destination.

Gateway IP
Address

Enter the IP address of the gateway. The gateway is an immediate
neighbor of your Switch that will forward the packet to the destination.
The gateway must be a router on the same segment as your Switch.

Metric

The metric represents the “cost” of transmission for routing purposes. IP
routing uses hop count as the measurement of cost, with a minimum of 1
for directly connected networks. Enter a number that approximates the
cost for this link. The number need not be precise, but it must be between
1 and 15. In practice, 2 or 3 is usually a good number.

Add

Click Add to insert a new static route to the Switch’s run-time memory.
The Switch loses these changes if it is turned off or loses power, so use the
Save link on the top navigation panel to save your changes to the nonvolatile memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

Clear

Click Clear to set the above fields back to the factory defaults.

Index

This field displays the index number of the route. Click a number to edit
the static route entry.

Active

This field displays Yes when the static route is activated and NO when it is
deactivated.

Name

This field displays the descriptive name for this route. This is for
identification purposes only.

Destination
Address

This field displays the IP network address of the final destination.

Subnet Mask

This field displays the subnet mask for this destination.

Gateway
Address

This field displays the IP address of the gateway. The gateway is the
immediate neighbor of your Switch that will forward the packet to the
destination.

Metric

This field displays the cost of transmission for routing purposes.

Delete

Click Delete to remove the selected entry from the summary table.

Cancel

Click Cancel to clear the Delete check boxes.

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CHAPTER

32
RIP

This chapter shows you how to configure RIP (Routing Information Protocol).

32.1 RIP Overview
RIP (Routing Information Protocol) allows a routing device to exchange routing
information with other routers. The Direction field controls the sending and
receiving of RIP packets. When set to:
• Both - the Switch will broadcast its routing table periodically and incorporate the
RIP information that it receives.
• Incoming - the Switch will not send any RIP packets but will accept all RIP
packets received.
• Outgoing - the Switch will send out RIP packets but will not accept any RIP
packets received.
• None - the Switch will not send any RIP packets and will ignore any RIP packets
received.
The Version field controls the format and the broadcasting method of the RIP
packets that the Switch sends (it recognizes both formats when receiving). RIP-1
is universally supported; but RIP-2 carries more information. RIP-1 is probably
adequate for most networks, unless you have an unusual network topology.
Both RIP-2B and RIP-2M send the routing data in RIP-2 format; the difference
being that RIP-2B uses subnet broadcasting while RIP-2M uses multicasting.

32.2 Configuring RIP
Click IP Application > RIP in the navigation panel to display the screen as
shown. You cannot manually configure a new entry. Each entry in the table is

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Chapter 32 RIP
automatically created when you configure a new IP domain in the IP Setup
screen (refer to Section 8.6 on page 86).

Figure 147 IP Application > RIP

The following table describes the labels in this screen.

Table 92 IP Application > RIP
LABEL

DESCRIPTION

Active

Select this check box to enable RIP on the Switch.

Index

This field displays the index number of an IP interface.

Network

This field displays the IP interface configured on the Switch.
Refer to the section on IP Setup for more information on configuring IP
domains.

276

Directio
n

Select the RIP direction from the drop-down list box. Choices are Outgoing,
Incoming, Both and None.

Version

Select the RIP version from the drop-down list box. Choices are RIP-1, RIP2B and RIP-2M.

Apply

Click Apply to save your changes to the Switch’s run-time memory. The Switch
loses these changes if it is turned off or loses power, so use the Save link on
the top navigation panel to save your changes to the non-volatile memory
when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

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CHAPTER

33
OSPF

This chapter describes the OSPF (Open Shortest Path First) routing protocol and
shows you how to configure OSPF.

33.1 OSPF Overview
OSPF (Open Shortest Path First) is a link-state protocol designed to distribute
routing information within an autonomous system (AS). An autonomous system is
a collection of networks using a common routing protocol to exchange routing
information.
OSPF offers some advantages over traditional vector-space routing protocols
(such as RIP). The following table summarizes some of the major differences
between OSPF and RIP.

Table 93 OSPF vs. RIP
OSPF

RIP

Network
Size

Large

Small (with up to 15 routers)

Metrics

Bandwidth, hop count, throughput,
round trip time and reliability.

Hop count

Convergenc
e

Fast

Slow

33.1.1 OSPF Autonomous Systems and Areas
An OSPF autonomous system (AS) can be divided into logical areas. Each area
represents a group of adjacent networks. All areas are connected to a backbone
(also known as area 0). The backbone is the transit area to route packets between
two areas. A stub area, at the edge of an AS is not a transit area since there is
only one connection to the stub area.

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The following table describes the four classes of OSPF routers.

Table 94 OSPF: Router Types
TYPE

DESCRIPTION

Internal Router (IR)

An Internal or intra-area router is a router in an area.

Area Border Router
(ABR)

An Area Border Router connects two or more areas.

Backbone Router (BR)

A backbone router has an interface to the backbone.

AS Boundary Router

An AS boundary router exchanges routing information with
routers in other ASs.

The following figure depicts an OSPF network example. The backbone is area 0
with a backbone router. The internal routers are in area 1 and 2. The area border
routers connect area 1 and 2 to the backbone.

Figure 148 OSPF Network Example

33.1.2 How OSPF Works
Layer 3 devices exchange routing information to build a synchronized link state
database within the same AS or area. The link state database contains records of
router IDs, their associated links and path costs. Each device can then use the link
state database and Dijkstra algorithm to compute the least cost paths to network
destinations.
Layer 3 devices build a synchronized link state database by exchanging Hello
messages to confirm which neighbor (layer 3) devices exist and then they
exchange database descriptions (DDs) to create the link state database. The link
state database is constantly updated through LSAs (Link State Advertisements).

33.1.3 Interfaces and Virtual Links
An OSPF interface is a link between a layer 3 device and an OSPF network. An
interface has state information, an IP address and subnet mask associated with it.

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When you configure an OSPF interface, you first set an interface to transmit OSPF
traffic and add the interface to an area.
You can configure a virtual link to establish/maintain connectivity between a nonbackbone area and the backbone. The virtual link must be configured on both
layer 3 devices in the non-backbone area and the backbone.

33.1.4 OSPF and Router Elections
The OSPF protocol provides for automatic election of Designated Router (DR) and
Backup Designated Router (BDR) on network segments. The DR and BDR keep
track of link state updates in their area and make sure LSAs are sent to the rest of
the network.
In most cases the default DR/BDR election is fine, but in some situations it must
be controlled. In the following figure only router A has direct connectivity with all
the other routers on the network segment. Routers B and C do not have a direct
connection with each other. Therefore they should not be allowed to become DR or
BDR. Only router A should become the DR.

Figure 149 OSPF Router Election Example

You can assign a priority to an interface which determines whether this router will
be elected to be a DR or BDR. The router with the highest priority becomes the
DR, while a router with a priority of 0 does not participate in router elections. In
Figure 149 on page 279 you can assign a priority of 0 to routers B and C, thereby
ensuring they do not become DR or BDR and assign a priority of 1 to router A to
make sure that it does become the DR.

33.1.5 Configuring OSPF
To configure OSPF on the Switch, do the following tasks
1

Enable OSPF

2

Create OSPF areas

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3

Create and associate interface(s) to an area

4

Create virtual links to maintain backbone connectivity.

33.2 OSPF Status
Use this screen to view current OSPF status. Click IP Application > OSPF in the
navigation panel to display the screen as shown next. See Section 33.1 on page
277 for more information on OSPF.

Figure 150 IP Application > OSPF Status

The following table describes the labels in this screen.

Table 95 IP Application > OSPF Status

280

LABEL

DESCRIPTION

OSPF

This field displays whether OSPF is activated (Running) or not (Down).

Interface

The text box displays the OSPF status of the interface(s) on the Switch.

Neighbor

The text box displays the status of the neighboring router participating in
the OSPF network.

Link State
Database

The text box displays information in the link state database which contains
data in the LSAs.

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Table 95 IP Application > OSPF Status (continued)
LABEL

DESCRIPTION

Poll
Interval(s)

The text box displays how often (in seconds) this screen refreshes. You
may change the refresh interval by typing a new number in the text box
and then clicking Set Interval.

Stop

Click Stop to end OSPF status polling.

The following table describes some common output fields.

Table 96 OSPF Status: Common Output Fields
FIELD

DESCRIPTION

Interface
Internet
Address

This field displays the IP address and subnet bits of an IP routing
domain.

Area

This field displays the area ID.

Router ID

This field displays the unique ID of the Switch.

Transmit Delay

This field displays the transmission delay in seconds.

State

This field displays the state of the Switch (backup or DR (designated
router)).

Priority

This field displays the priority of the Switch. This number is used in the
designated router election.

Designated
Router

This field displays the router ID of the designated router.

Backup
Designated
Router

This field displays the router ID of a backup designated router.

Time Intervals
Configured

This field displays the time intervals (in seconds) configured.

Neighbor Count This field displays the number of neighbor routers.
Adjacent
This field displays the number of neighbor router(s) that is adjacent to
Neighbor Count the Switch.
Neighbor
Neighbor ID

This field displays the router ID of the neighbor.

Pri

This field displays the priority of the neighbor. This number is used in
the designated router election.

State

This field displays the state of the neighbor (backup or DR (designated
router)).

Dead Time

This field displays the dead time in seconds.

Address

This field displays the IP address of a neighbor.

Interface

This field displays the MAC address of a device.

Link State Database
Link ID

This field displays the ID of a router or subnet.

ADV Router

This field displays the IP address of the layer-3 device that sends the
LSAs.

Age

This field displays the time (in seconds) since the last LSA was sent.

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Table 96 OSPF Status: Common Output Fields (continued)
FIELD

DESCRIPTION

Seq #

This field displays the link sequence number of the LSA.

Checksum

This field displays the checksum value of the LSA.

Link Count

This field displays the number of links in the LSA.

33.3 OSPF Configuration
Use this screen to activate OSPF and set general settings. Click IP Application >
OSPF and the Configuration link to display the OSPF Configuration screen.
See Section 33.1 on page 277 for more information on OSPF.

Figure 151 IP Application > OSPF Configuration: Activating and General Settings

The follow table describes the related labels in this screen.

Table 97 IP Application > OSPF Configuration: Activating and General Settings

282

LABEL

DESCRIPTION

Active

OSPF is disabled by default. Select this option to enable it.

Router ID

Router ID uniquely identifies the Switch in an OSPF. Enter a unique ID (that
uses the format of an IP address in dotted decimal notation) for the Switch.

Apply

Click Apply to save your changes to the Switch’s run-time memory. The
Switch loses these changes if it is turned off or loses power, so use the Save
link on the top navigation panel to save your changes to the non-volatile
memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

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33.4 Configure OSPF Areas
To ensure that the Switch receives only routing information from a trusted layer 3
devices, activate authentication. The OSPF supports three levels of authentication:
• None – no authentication is used.
• Simple – authenticate link state updates using an 8 printable ASCII character
password.
• MD5 – authenticate link state updates using a 16 printable ASCII character
password.
To configure an area, set the related fields in the OSPF Configuration screen.

Figure 152 IP Application > OSPF Configuration: Area Setup

The following table describes the related labels in this screen.

Table 98 IP Application > OSPF Configuration: Area Setup
LABEL

DESCRIPTION

Name

Enter a descriptive name (up to 32 printable ASCII characters) for
identification purposes.

Area ID

Enter a 32-bit ID (that uses the format of an IP address in dotted decimal
notation) that uniquely identifies an area.
A value of 0.0.0.0 indicates that this is a backbone (also known as Area 0).
You can create only one backbone area on the Switch.

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Table 98 IP Application > OSPF Configuration: Area Setup (continued)
LABEL

DESCRIPTION

Authenticati
on

Select an authentication method (Simple or MD5) to activate
authentication. Select None (default) to disable authentication.
Usually interface(s) and virtual interface(s) should use the same
authentication method as the associated area. If interface(s) and virtual
interface(s) use different authentication methods than the associated area,
the authentication methods are based on the interface(s) and virtual
interface(s) settings.

Stub
Network

Select this option to set the area as a stub area.
If you enter 0.0.0.0 in the Area ID field, the settings in the Stub Area
fields are ignored.

No
Select this option to set the Switch to not send/receive LSAs.
Summary
Default
Route
Cost

Specify a cost (between 0 and 16777214) used to add a default route into
a stub area for routes which are external to an OSPF domain. If you do not
set a route cost, no default route is added.

Add

Click Add to save your changes to the Switch’s run-time memory. The
Switch loses these changes if it is turned off or loses power, so use the
Save link on the top navigation panel to save your changes to the nonvolatile memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

Clear

Click Clear to set the above fields back to the factory defaults.

33.4.1 View OSPF Area Information Table
The bottom of the OSPF Configuration screen displays a summary table of all
the OSPF areas you have configured.

Figure 153 IP Application > OSPF Configuration: Summary Table

The following table describes the related labels in this screen.

Table 99 IP Application > OSPF Configuration: Summary Table
LABEL

DESCRIPTION

Index

This field displays the index number of an area.

Name

This field displays the descriptive name of an area.

Area ID

This field displays the area ID (that uses the format of an IP address in
dotted decimal notation) that uniquely identifies an area.
An area ID of 0.0.0.0 indicates the backbone.

Authenticati
on

284

This field displays the authentication method used (None, Simple or
MD5).

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Table 99 IP Application > OSPF Configuration: Summary Table (continued)
LABEL

DESCRIPTION

Stub
Network

This field displays whether an area is a stub network (Yes) or not (No).

Delete

Click Delete to remove the selected entry from the summary table.

Cancel

Click Cancel to clear the Delete check boxes.

33.5 Configuring OSPF Redistribution
Use this screen to configure route redistribution and summary addresses. Route
redistribution is used when other routers which use RIP routing protocol and/or
static routes need to exchange routing information with the Switch using OSPF
routing protocol. A summary address is used to cover more than one routing
entries in order to reduce the routing table size.
In the OSPF Configuration screen, click Redistribute to display the OSPF
Redistribution screen.

Figure 154 IP Application > OSPF Configuration > Redistribute

The following table describes the labels in this screen.

Table 100 IP Application > OSPF Configuration > Redistribute
LABEL

DESCRIPTION

Redistribute
Route

Route redistribution allows your Switch to import and translate external
routes learned through RIP routing protocol or configured manually
(Static) into the OSPF network transparently.

Active

Select this option to activate route redistribution for routes learned through
the selected protocol.

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Table 100 IP Application > OSPF Configuration > Redistribute (continued)
LABEL

DESCRIPTION

Type

Select 1 for routing protocols (such as RIP) whose external metrics are
directly comparable to the internal OSPF cost. When selecting a path, the
internal OSPF cost is added to the AB boundary router to the external
metrics.
Select 2 for routing protocols whose external metrics are not comparable
to the OSPF cost. In this case, the external cost of the AB boundary router
is used in path decision to a destination.

Metric Value

Enter a route cost (between 0 and 16777214). The default metric value is
15.

Apply

Click Apply to save your changes to the Switch’s run-time memory. The
Switch loses these changes if it is turned off or loses power, so use the
Save link on the top navigation panel to save your changes to the nonvolatile memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

Summary
address

Enter a network IP address which can cover more than one network in
order to reduce the routing table size. For example, you can use
192.168.8.0/22 instead of using 192.168.8.0/24, 192.168.9.0/24,
192.168.10.0/24, and 192.168.11.0/24.
The third octet of these four network IP addresses is 00001000, 00001001,
00001010, 00001011 respectively. The first 6 digits (000010) are the
common part among these IP addresses. So 192.168.8.0/22 can represent
all of these networks.

Subnet
mask

Enter the subnet mask for this summary IP address which can cover
multiple networks.

Add

Click Add to save your changes to the Switch’s run-time memory. The
Switch loses these changes if it is turned off or loses power, so use the
Save link on the top navigation panel to save your changes to the nonvolatile memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

33.6 Configuring OSPF Interfaces
To configure an OSPF interface, first create an IP routing domain in the IP Setup
screen (see Section 8.6 on page 86 for more information). Once you create an IP
routing domain, an OSPF interface entry is automatically created. See Section
33.1 on page 277 for more information on OSPF.

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In the OSPF Configuration screen, click Interface to display the OSPF
Interface screen.

Figure 155 IP Application > OSPF Configuration > OSPF Interface

The following table describes the labels in this screen.

Table 101 IP Application > OSPF Configuration > OSPF Interface
LABEL

DESCRIPTION

Network

Select an IP interface.

Area ID

Select the area ID (in an IP address format with dotted decimal notation)
of an area to associate the interface to that area.

Authenticati
on

Note: OSPF Interface(s) must use the same authentication method
within the same area.
Select an authentication method. The choices are Same-as-Area, None
(default), Simple and MD5.
To participate in an OSPF network, you must make the authentication
method and/or password settings the same as the associated area.
Select Same-as-Area to use the same authentication method within the
area and set the related fields when necessary.
Select None to disable authentication. This is the default setting.
Select Simple and set the Key field to authenticate OSPF packets
transmitted through this interface using simple password authentication.
Select MD5 and set the Key ID and Key fields to authenticate OSPF
packets transmitted through this interface using MD5 authentication.

Key ID

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When you select MD5 in the Authentication field, specify the
identification number of the authentication you want to use.

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Table 101 IP Application > OSPF Configuration > OSPF Interface (continued)
LABEL

DESCRIPTION

Key

When you select Simple in the Authentication field, enter a password
eight-character long. Characters after the eighth character will be ignored.
When you select MD5 in the Authentication field, enter a password 16character long.

Cost

The interface cost is used for calculating the routing table. Enter a number
between 0 and 65535. The default interface cost is 15.

Priority

The priority you assign to the interface is used in router elections to decide
which router is going to be the Designated Router (DR) or the Backup
Designated Router (BDR). You can assign a number between 0 and 255. A
priority of 0 means that the router will not participate in router elections.

Add

Click Add to save your changes to the Switch’s run-time memory. The
Switch loses these changes if it is turned off or loses power, so use the
Save link on the top navigation panel to save your changes to the nonvolatile memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

Clear

Click Clear to set the above fields back to the factory defaults.

Index

This field displays the index number for an interface.

Network

This field displays the IP interface information.

Area ID

This field displays the area ID (in an IP address format with dotted decimal
notation) of an area to associate the interface to that area.

Authenticati
on

This field displays the authentication method used (Same-as-Area, None,
Simple or MD5).

Key ID

When the Authentication field displays MD5, this field displays the
identification number of the key used.

Cost

This field displays the interface cost used for calculating the routing table.

Priority

This field displays the priority for this OSPF interface.

Delete

Click Delete to remove the selected entry from the summary table.

Cancel

Click Cancel to begin configuring this screen afresh.

33.7 OSPF Virtual-Links
Configure and view virtual link settings in this screen. See Section 33.1 on page
277 for more information on OSPF.

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In the OSPF Configuration screen, click Virtual-Link to display the screen as
shown next.

Figure 156 IP Application > OSPF Configuration > OSPF Virtual Link

The following table describes the related labels in this screen.

Table 102 IP Application > OSPF Configuration > OSPF Virtual Link
LABEL

DESCRIPTION

Name

Enter a descriptive name (up to 32 printable ASCII characters) for
identification purposes.

Area ID

Select the area ID (in an IP address format with dotted decimal notation)
of an area to associate the interface to that area.

Peer Router
ID

Enter the ID of a peer border router.

Authenticatio
n

Note: Virtual interface(s) must use the same authentication method
within the same area.
Select an authentication method. The choices are Same-as-Area,
None (default), Simple and MD5.
To exchange OSPF packets with a peer border router, you must make the
authentication method and/or password settings the same as the peer
border router.
Select Same-as-Area to use the same authentication method within
the area and set the related fields when necessary.
Select None to disable authentication. This is the default setting.
Select Simple to authenticate OSPF packets transmitted through this
interface using a simple password.
Select MD5 to authenticate OSPF packets transmitted through this
interface using MD5 authentication.

Key ID

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When you select MD5 in the Authentication field, specify the
identification number of the authentication you want to use.

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Table 102 IP Application > OSPF Configuration > OSPF Virtual Link (continued)
LABEL

DESCRIPTION

Key

When you select Simple in the Authentication field, enter a password
eight-character long.
When you select MD5 in the Authentication field, enter a password 16character long.

290

Add

Click Add to save your changes to the Switch’s run-time memory. The
Switch loses these changes if it is turned off or loses power, so use the
Save link on the top navigation panel to save your changes to the nonvolatile memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

Clear

Click Clear to set the above fields back to the factory defaults.

Index

This field displays an index number of an entry.

Name

This field displays a descriptive name of a virtual link.

Peer Router
ID

This field displays the ID (that uses the format of an IP address in dotted
decimal notation) of a peer border router.

Authenticatio
n

This field displays the authentication method used (Same-as-Area,
None, Simple or MD5).

Key ID

When the Authentication field displays MD5, this field displays the
identification number of the key used.

Delete

Click Delete to remove the selected entry from the summary table.

Cancel

Click Cancel to clear the Delete check boxes.

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CHAPTER

34
IGMP

This chapter shows you how to configure the Switch as a multicast router. See also
Section 24.4 on page 203 for information on IGMP snooping.

34.1 IGMP Overview
IP multicast is an IETF standard for distributing data to multiple recipients. The
following figure shows a multicast session and the relationship between a
multicast server, multicast routers and multicast hosts. A multicast server
transmits multicast packets and multicast routers forward multicast packets to
multicast hosts.

Figure 157 IP Multicast

Multicast Routers

Hosts

Server

A host can decide to join or leave a multicast group at any time. A host can also be
a member of more than one multicast group. Multicast groups are identified by IP
addresses in the Class D range (224.0.0.0 to 239.255.255.255). A multicast
server sends packets addressed to a particular multicast group (multicast IP
address).

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IGMP (Internet Group Management Protocol) is used by multicast hosts to indicate
their multicast group membership to multicast routers. Multicast routers can also
use IGMP to periodically check if multicast hosts still want to receive transmission
from a multicast server. In other words, multicast routers check if any hosts on
their network are still members of a specific multicast group.
The Switch supports IGMP version 1 (IGMP-v1), version 2 (IGMP-v2) and IGMP
version 3 (IGMP-v3). Refer to RFC 1112, RFC 2236 and RFC 3376 for information
on IGMP versions 1, 2 and 3 respectively. At start up, the Switch queries all
directly connected networks to gather group membership. After that, the Switch
periodically updates this information.

34.1.1 How IGMP Works
This section describes how IGMP works and the changes it has gone through from
version 1 to version 3. IGMP version 1 defines how a multicast router checks to
see if any multicast hosts are part of a multicast group. It checks for group
membership by sending out an IGMP Query packet. Hosts that are members of a
multicast group reply with an IGMP Report packet. This is also referred to as a join
group request. The multicast router then keeps a list of all networks that have
members of this multicast group and forwards multicast traffic to that network.

Figure 158 IGMP Version 1 Example

1 Query
2 Report

The main difference in IGMP version 2 is that it provides a mechanism for a
multicast group member to notify a multicast router that it is leaving a multicast
group. The multicast router then sends a group-specific IGMP query to check if
there are any members remaining in that group. If the multicast router does not
receive an IGMP report from any members, it stops sending multicast traffic to
that group. This change helps shorten the leave convergence time, in other words,
the amount of time that a multicast router believes that there are group members

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on a particular network. This in turn helps reduce the amount of multicast traffic
going through the multicast router.

Figure 159 IGMP Version 2 Example

1 Query
2 Report

3 Leave

IGMP version 3 allows a multicast host to join a multicast group and specify from
which source (multicast server) it wants to receive multicast packets.
Alternatively, a multicast host can specify from which multicast servers it does not
want to receive multicast packets. In the following figure multicast server X (IP
address 10.1.1.1) and multicast server Z (IP address 13.2.2.2) both send
multicast traffic to the same multicast group identified by the multicast IP address
225.1.1.1. In IGMP version 3 multicast host A can join multicast group
225.1.1.1 and specify that it only wants to receive multicast packets from server
X.

Figure 160 IGMP Version 3 Example
X

Z

Group: 225.1.1.1
Server: 10.1.1.1

Group: 225.1.1.1
Server: 13.2.2.2

Join: 225.1.1.1
Include: 10.1.1.1

A

34.2 Port-based IGMP
The Switch sends IGMP Query packets to all ports. The Switch then listens for
IGMP Report packets, and it records which port the messages came from. It then
delivers multicast traffic to only those ports from which it received a request to
join a multicast group.

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34.3 Configuring IGMP
Click IP Application > IGMP in the navigation panel to display the screen as
shown next. Each entry in the table is automatically created when you configure a
new IP domain in the IP Setup screen (refer to Section 8.6 on page 86).

Figure 161 IP Application > IGMP

The following table describes the labels in this screen.

Table 103 IP Application > IGMP
LABEL

DESCRIPTION

Active

Select this check box to enable IGMP on the Switch.

Note: You cannot enable both IGMP snooping and IGMP at the same
time. Refer to Section 24.4 on page 203 for more information on
IGMP snooping.
Unknown
Multicast
Frame

Specify the action to perform when the Switch receives an unknown
multicast frame. Unknown multicast frames are addressed to multicast
groups for which the Switch has not recorded any group members. Select
Drop to discard the frame(s). Select Flooding to send the frame(s) to all
ports.

Index

This field displays an index number of an entry.

Network

This field displays the IP domain configured on the Switch.
Refer to Section 8.6 on page 86 for more information on configuring IP
domains.

Version

Select an IGMP version from the drop-down list box. The choices are IGMPv1, IGMP-v2, IGMP-v3 and None.
Generally, if you want to enable IGMP on the Switch, you should choose
IGMP-v3 as it is compatible with older versions. Choose an earlier version of
IGMP (IGMP-v2 or IGMP-v1) if the multicast hosts on your network can not
recognize IGMP version 3 or version 2 Query messages.

294

Apply

Click Apply to save your changes to the Switch’s run-time memory. The
Switch loses these changes if it is turned off or loses power, so use the Save
link on the top navigation panel to save your changes to the non-volatile
memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

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CHAPTER

35
DVMRP

This chapter introduces DVMRP and tells you how to configure it.

35.1 DVMRP Overview
DVMRP (Distance Vector Multicast Routing Protocol) is a protocol used for routing
multicast data within an autonomous system (AS). This DVMRP implementation is
based on draft-ietf-idmr-dvmrp-v3-10. DVMRP provides multicast forwarding
capability to a layer 3 switch that runs both the IPv4 protocol (with IP Multicast
support) and the IGMP protocol. The DVMRP metric is a hop count of 32.
IGMP is a protocol used for joining or leaving a multicast group. You must have
IGMP enabled when you enable DVMRP; otherwise you see the screen as in Figure
164 on page 297.

35.2 How DVMRP Works
DVMRP uses the Reverse Path Multicasting (RPM) algorithm to generate an IP
Multicast delivery tree. Multicast packets are forwarded along these multicast tree
branches. DVMRP dynamically learns host membership information using Internet
Group Management Protocol (IGMP). The trees are updated dynamically to track
the membership of individual groups.
1

Initially an advertisement multicast packet is broadcast (“B” in the following
figure).

2

DVMRP-enabled Layer 3 devices that do not have any hosts in their networks that
belong to this multicast group send back a prune message (“P”).

3

If hosts later join the multicast group, a graft message (“G”) to undo the prune is
sent to the parent.

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4

The final multicast (“M”) after pruning and grafting is shown in the next figure.

Figure 162 How DVMRP Works

35.2.1 DVMRP Terminology
DVMRP probes are used to discover other DVMRP Neighbors on a network.
DVMRP reports are used to exchange DVMRP source routing information. These
packets are used to build the DVMRP multicast routing table that is used to build
source trees and also perform Reverse Path Forwarding (RPF) checks on incoming
multicast packets. RPF checks prevent duplicate packets being filtered when loops
exist in the network topology.
DVMRP prunes trim the multicast delivery tree(s). DVMRP grafts attach a branch
back onto the multicast delivery tree.

35.3 Configuring DVMRP
Configure DVMRP on the Switch when you wish it to act as a multicast router
(“mrouter”). Click IP Application > DVMRP in the navigation panel to display
the screen as shown.

Figure 163 IP Application > DVMRP

The following table describes the labels in this screen.

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Table 104 IP Application > DVMRP
LABEL

DESCRIPTION

Active

Select Active to enable DVMRP on the Switch. You should do this if you want
the Switch to act as a multicast router.

Threshol
d

Threshold is the maximum time to live (TTL) value. TTL is used to limit the
scope of multicasting. You should reduce this value if you do not wish to flood
Layer 3 devices many hops away with multicast traffic. This applies only to
multicast traffic this Switch sends out.

Index

Index is the DVMRP configuration for the IP routing domain defined under
Network. The maximum number of DVMRP configurations allowed is the
maximum number of IP routing domains allowed on the Switch. See Section
8.6 on page 86 for more information on IP routing domains.

Network

This is the IP routing domain IP address and subnet mask you set up in IP
Setup.

VID

DVMRP cannot be enabled on the same VLAN group across different IP routing
domains, that is, you cannot have duplicate VIDs for different DVMRP
configurations (see Figure 166 on page 298).

Active

Select Active to enable DVMRP on this IP routing domain.

Apply

Click Apply to save your changes to the Switch’s run-time memory. The Switch
loses these changes if it is turned off or loses power, so use the Save link on
the top navigation panel to save your changes to the non-volatile memory
when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

35.3.1 DVMRP Configuration Error Messages
You must have IGMP enabled when you enable DVMRP; otherwise you see the
screen as in the next figure.

Figure 164 DVMRP: IGMP Not Set Error

When you disable IGMP, but DVMRP is still active you also see another warning
screen.

Figure 165 DVMRP: Unable to Disable IGMP Error

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Each IP routing domain DVMRP configuration must be in a different VLAN group;
otherwise you see the following screen.

Figure 166 DVMRP: Duplicate VID Error Message

35.4 Default DVMRP Timer Values
The following are some default DVMRP timer values.

Table 105 DVMRP: Default Timer Values
DVMRP FIELD

298

DEFAULT VALUE

Probe interval

10 sec

Report interval

35 sec

Route expiration time

140 sec

Prune lifetime

Variable (less than two
hours)

Prune retransmission
time

3 sec with exponential back
off

Graft retransmission
time

5 sec with exponential back
off

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36

Differentiated Services
This chapter shows you how to configure Differentiated Services (DiffServ) on the
Switch.

36.1 DiffServ Overview
Quality of Service (QoS) is used to prioritize source-to-destination traffic flows. All
packets in the flow are given the same priority. You can use CoS (class of service)
to give different priorities to different packet types.
DiffServ is a class of service (CoS) model that marks packets so that they receive
specific per-hop treatment at DiffServ-compliant network devices along the route
based on the application types and traffic flow. Packets are marked with DiffServ
Code Points (DSCPs) indicating the level of service desired. This allows the
intermediary DiffServ-compliant network devices to handle the packets differently
depending on the code points without the need to negotiate paths or remember
state information for every flow. In addition, applications do not have to request a
particular service or give advanced notice of where the traffic is going.

36.1.1 DSCP and Per-Hop Behavior
DiffServ defines a new DS (Differentiated Services) field to replace the Type of
Service (ToS) field in the IP header. The DS field contains a 6-bit DSCP field which
can define up to 64 service levels and the remaining 2 bits are defined as currently
unused (CU). The following figure illustrates the DS field.

Figure 167 DiffServ: Differentiated Service Field
DSCP (6 bits)

CU (2 bits)

DSCP is backward compatible with the three precedence bits in the ToS octet so
that non-DiffServ compliant, ToS-enabled network device will not conflict with the
DSCP mapping.
The DSCP value determines the PHB (Per-Hop Behavior), that each packet gets as
it is forwarded across the DiffServ network. Based on the marking rule different

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kinds of traffic can be marked for different priorities of forwarding. Resources can
then be allocated according to the DSCP values and the configured policies.

36.1.2 DiffServ Network Example
The following figure depicts a DiffServ network consisting of a group of directly
connected DiffServ-compliant network devices. The boundary node (A in Figure
168) in a DiffServ network classifies (marks with a DSCP value) the incoming
packets into different traffic flows (Platinum, Gold, Silver, Bronze) based on the
configured marking rules. A network administrator can then apply various traffic
policies to the traffic flows. For example, one traffic policy would be to give higher
drop precedence to one traffic flow over others. In our example packets in the
Bronze traffic flow are more likely to be dropped when congestion occurs than the
packets in the Platinum traffic flow as they move across the DiffServ network.

Figure 168 DiffServ Network

A

P G S B
P - Platinum
G - Gold
S - Silver
B - Bronze

S G P P

S G P P
S
B
B

36.2 Two Rate Three Color Marker Traffic
Policing
Traffic policing is the limiting of the input or output transmission rate of a class of
traffic on the basis of user-defined criteria. Traffic policing methods measure traffic
flows against user-defined criteria and identify it as either conforming, exceeding
or violating the criteria.
Two Rate Three Color Marker (TRTCM, defined in RFC 2698) is a type of traffic
policing that identifies packets by comparing them to two user-defined rates: the
Committed Information Rate (CIR) and the Peak Information Rate (PIR). The CIR

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specifies the average rate at which packets are admitted to the network. The PIR
is greater than or equal to the CIR. CIR and PIR values are based on the
guaranteed and maximum bandwidth respectively as negotiated between a
service provider and client.
Two Rate Three Color Marker evaluates incoming packets and marks them with
one of three colors which refer to packet loss priority levels. High packet loss
priority level is referred to as red, medium is referred to as yellow and low is
referred to as green. After TRTCM is configured and DiffServ is enabled the
following actions are performed on the colored packets:
• Red (high loss priority level) packets are dropped.
• Yellow (medium loss priority level) packets are dropped if there is congestion on
the network.
• Green (low loss priority level) packets are forwarded.
TRTCM operates in one of two modes: color-blind or color-aware. In color-blind
mode, packets are marked based on evaluating against the PIR and CIR
regardless of if they have previously been marked or not. In the color-aware
mode, packets are marked based on both existing color and evaluation against the
PIR and CIR. If the packets do not match any of colors, then the packets proceed
unchanged.

36.2.1 TRTCM - Color-blind Mode
All packets are evaluated against the PIR. If a packet exceeds the PIR it is marked
red. Otherwise it is evaluated against the CIR. If it exceeds the CIR then it is
marked yellow. Finally, if it is below the CIR then it is marked green.

Figure 169 TRTCM - Color-blind Mode

Exceed NO
PIR?
YES

High Packet
Loss

Exceed NO
CIR?

Low Packet
Loss

YES

Medium Packet
Loss

36.2.2 TRTCM - Color-aware Mode
In color-aware mode the evaluation of the packets uses the existing packet loss
priority. TRTCM can increase a packet loss priority of a packet but it cannot

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decrease it. Packets that have been previously marked red or yellow can only be
marked with an equal or higher packet loss priority.
Packets marked red (high packet loss priority) continue to be red without
evaluation against the PIR or CIR. Packets marked yellow can only be marked red
or remain yellow so they are only evaluated against the PIR. Only the packets
marked green are first evaluated against the PIR and then if they don’t exceed the
PIR level are they evaluated against the CIR.

Figure 170 TRTCM - Color-aware Mode
NO

Red?
YES

High Packet
Loss

Exceed NO
PIR?
YES

High Packet
Loss

NO

Yellow?
YES

Medium Packet
Loss

Exceed NO Low Packet
Loss
CIR?
YES

Medium Packet
Loss

36.3 Activating DiffServ
Activate DiffServ to apply marking rules or IEEE 802.1p priority mapping on the
selected port(s).
Click IP Application > DiffServ in the navigation panel to display the screen as
shown.

Figure 171 IP Application > DiffServ

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The following table describes the labels in this screen.

Table 106 IP Application > DiffServ
LABEL

DESCRIPTION

Active

Select this option to enable DiffServ on the Switch.

Port

This field displays the index number of a port on the Switch.

*

Settings in this row apply to all ports.
Use this row only if you want to make some settings the same for all ports.
Use this row first to set the common settings and then make adjustments
on a port-by-port basis.

Note: Changes in this row are copied to all the ports as soon as you
make them.
Active

Select Active to enable DiffServ on the port.

Apply

Click Apply to save your changes to the Switch’s run-time memory. The
Switch loses these changes if it is turned off or loses power, so use the
Save link on the top navigation panel to save your changes to the nonvolatile memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

36.3.1 Configuring 2-Rate 3 Color Marker Settings
Use this screen to configure TRTCM settings. Click the 2-rate 3 Color Marker link
in the DiffServ screen to display the screen as shown next.

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Note: You cannot enable both TRTCM and Bandwidth Control at the same time.
Figure 172 IP Application > DiffServ > 2-rate 3 Color Marker

The following table describes the labels in this screen.

Table 107 IP Application > DiffServ > 2-rate 3 Color Marker
LABEL

DESCRIPTION

Active

Select this to activate TRTCM (Two Rate Three Color Marker) on the Switch. The
Switch evaluates and marks the packets based on the TRTCM settings.

Note: You must also activate DiffServ on the Switch and the individual
ports for the Switch to drop red (high loss priority) colored packets.
Mode

Select color-blind to have the Switch treat all incoming packets as uncolored.
All incoming packets are evaluated against the CIR and PIR.
Select color-aware to treat the packets as marked by some preceding entity.
Incoming packets are evaluated based on their existing color. Incoming packets
that are not marked proceed through the Switch.

Port

This field displays the index number of a port on the Switch.

*

Settings in this row apply to all ports.
Use this row only if you want to make some settings the same for all ports. Use
this row first to set the common settings and then make adjustments on a portby-port basis.

Note: Changes in this row are copied to all the ports as soon as you make
them.
Active

304

Select this to activate TRTCM on the port.

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Table 107 IP Application > DiffServ > 2-rate 3 Color Marker (continued)
LABEL

DESCRIPTION

Commit Specify the Commit Information Rate (CIR) for this port.
Rate
Peak
Rate

Specify the Peak Information Rate (PIR) for this port.

DSCP

Use this section to specify the DSCP values that you want to assign to packets
based on the color they are marked via TRTCM.

green

Specify the DSCP value to use for packets with low packet loss priority.

yellow

Specify the DSCP value to use for packets with medium packet loss priority.

red

Specify the DSCP value to use for packets with high packet loss priority.

Apply

Click Apply to save your changes to the Switch’s run-time memory. The Switch
loses these changes if it is turned off or loses power, so use the Save link on the
top navigation panel to save your changes to the non-volatile memory when
you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

36.4 DSCP-to-IEEE 802.1p Priority Settings
You can configure the DSCP to IEEE 802.1p mapping to allow the Switch to
prioritize all traffic based on the incoming DSCP value according to the DiffServ to
IEEE 802.1p mapping table.
The following table shows the default DSCP-to-IEEE802.1p mapping.

Table 108 Default DSCP-IEEE 802.1p Mapping
DSCP VALUE 0 – 7

8 – 15

16 – 23 24 – 31 32 – 39 40 – 47 48 – 55 56 – 63

IEEE 802.1p

1

2

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3

4

5

6

7

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36.4.1 Configuring DSCP Settings
To change the DSCP-IEEE 802.1p mapping, click the DSCP Setting link in the
DiffServ screen to display the screen as shown next.

Figure 173 IP Application > DiffServ > DSCP Setting

The following table describes the labels in this screen.

Table 109 IP Application > DiffServ > DSCP Setting
LABEL

DESCRIPTION

0 … 63

This is the DSCP classification identification number.
To set the IEEE 802.1p priority mapping, select the priority level from the dropdown list box.

306

Apply

Click Apply to save your changes to the Switch’s run-time memory. The Switch
loses these changes if it is turned off or loses power, so use the Save link on the
top navigation panel to save your changes to the non-volatile memory when
you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

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37
DHCP

This chapter shows you how to configure the DHCP feature.

37.1 DHCP Overview
DHCP (Dynamic Host Configuration Protocol RFC 2131 and RFC 2132) allows
individual computers to obtain TCP/IP configuration at start-up from a server. You
can configure the Switch as a DHCP server or a DHCP relay agent. When
configured as a server, the Switch provides the TCP/IP configuration for the
clients. If you configure the Switch as a relay agent, then the Switch forwards
DHCP requests to DHCP server on your network. If you don’t configure the Switch
as a DHCP server or relay agent then you must have a DHCP server in the
broadcast domain of the client computers or else the client computers must be
configured manually.

37.1.1 DHCP Modes
The Switch can be configured as a DHCP server or DHCP relay agent.
• If you configure the Switch as a DHCP server, it will maintain the pool of IP
addresses along with subnet masks, DNS server and default gateway
information and distribute them to your LAN computers.
• If there is already a DHCP server on your network, then you can configure the
Switch as a DHCP relay agent. When the Switch receives a request from a
computer on your network, it contacts the DHCP server for the necessary IP
information, and then relays the assigned information back to the computer.

37.1.2 DHCP Configuration Options
The DHCP configuration on the Switch is divided into Global and VLAN screens.
The screen you should use for configuration depends on the DHCP services you
want to offer the DHCP clients on your network. Choose the configuration screen
based on the following criteria:
• Global - The Switch forwards all DHCP requests to the same DHCP server.

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• VLAN - The Switch is configured on a VLAN by VLAN basis. The Switch can be
configured as a DHCP server for one VLAN and at the same time the Switch can
be configured to relay DHCP requests for clients in another VLAN.

37.2 DHCP Status
Click IP Application > DHCP in the navigation panel. The DHCP Status screen
displays.

Figure 174 IP Application > DHCP Status

The following table describes the labels in this screen.

Table 110 IP Application > DHCP Status
LABEL

DESCRIPTION

Server Status

This section displays configuration settings related to the Switch’s DHCP
server mode.

Index

This is the index number.

VID

This field displays the VLAN ID for which the Switch is a DHCP server.

Server Status

This field displays the starting DHCP client IP address.

IP Pool Size

This field displays the number of IP addresses that can be assigned to
clients.

Relay Status

This section displays configuration settings related to the Switch’s DHCP
relay mode.

Relay Mode

This field displays:
•
•
•

None - if the Switch is not configured as a DHCP relay agent.
Global - if the Switch is configured as a DHCP relay agent only.
VLAN - followed by a VLAN ID if it is configured as a relay agent for
specific VLAN(s).

37.3 DHCP Server Status Detail
Click IP Application > DHCP in the navigation panel and then click an existing
index number of a DHCP server configuration to view the screen as shown. Use

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this screen to view details regarding DHCP server settings configured on the
Switch.

Figure 175 IP Application > DHCP > DHCP Server Status Detail

The following table describes the labels in this screen.

Table 111 IP Application > DHCP Server Status Detail
LABEL

DESCRIPTION

Start IP
Address

This field displays the starting IP address of the IP address pool
configured for this DHCP server instance.

End IP Address

This field displays the last IP address of the IP address pool configured
for this DHCP server instance.

Subnet Mask

This field displays the subnet mask value sent to clients from this DHCP
server instance.

Default
Gateway

This field displays the default gateway value sent to clients from this
DHCP server instance.

Primary DNS
Server

This field displays the primary DNS server value sent to clients from this
DHCP server instance.

Secondary DNS
Server

This field displays the secondary DNS server value sent to clients from
this DHCP server instance.

Address Leases

This section displays information about the IP addresses this DHCP
server issued to clients.

Index

This field displays a sequential number for each DHCP request handled
by the Switch.

IP Address

This is the IP address issued to a DHCP client.

Timer

This field displays the time remaining before the DHCP client has to
renew its IP address.

Hardware
Address

This field displays the MAC address of the DHCP client.

Hostname

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be used for DHCP because it is already assigned to the Switch itself.
This field displays the system name of the client.

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37.4 DHCP Relay
Configure DHCP relay on the Switch if the DHCP clients and the DHCP server are
not in the same broadcast domain. During the initial IP address leasing, the
Switch helps to relay network information (such as the IP address and subnet
mask) between a DHCP client and a DHCP server. Once the DHCP client obtains an
IP address and can connect to the network, network information renewal is done
between the DHCP client and the DHCP server without the help of the Switch.
The Switch can be configured as a global DHCP relay. This means that the Switch
forwards all DHCP requests from all domains to the same DHCP server. You can
also configure the Switch to relay DHCP information based on the VLAN
membership of the DHCP clients.

37.4.1 DHCP Relay Agent Information
The Switch can add information about the source of client DHCP requests that it
relays to a DHCP server by adding Relay Agent Information. This helps provide
authentication about the source of the requests. The DHCP server can then
provide an IP address based on this information. Please refer to RFC 3046 for
more details.
The DHCP Relay Agent Information feature adds an Agent Information field to
the Option 82 field. The Option 82 field is in the DHCP headers of client DHCP
request frames that the Switch relays to a DHCP server.
Relay Agent Information can include the System Name of the Switch if you
select this option. You can change the System Name in Basic Settings >
General Setup.
The following describes the DHCP relay information that the Switch sends to the
DHCP server:

Table 112 Relay Agent Information

310

FIELD LABELS

DESCRIPTION

Slot ID

(1 byte) This value is always 0 for stand-alone
switches.

Port ID

(1 byte) This is the port that the DHCP client is
connected to.

VLAN ID

(2 bytes) This is the VLAN that the port belongs to.

Information

(up to 64 bytes) This optional, read-only field is set
according to system name set in Basic Settings >
General Setup.

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37.4.2 Configuring DHCP Global Relay
Configure global DHCP relay in the DHCP Relay screen. Click IP Application >
DHCP in the navigation panel and click the Global link to display the screen as
shown.

Figure 176 IP Application > DHCP > Global

The following table describes the labels in this screen.

Table 113 IP Application > DHCP > Global
LABEL

DESCRIPTION

Active

Select this check box to enable DHCP relay.

Remote
Enter the IP address of a DHCP server in dotted decimal notation.
DHCP
Server 1 .. 3
Relay Agent
Information

Select the Option 82 check box to have the Switch add information (slot
number, port number and VLAN ID) to client DHCP requests that it relays to
a DHCP server.

Information

This read-only field displays the system name you configure in the General
Setup screen.
Select the check box for the Switch to add the system name to the client
DHCP requests that it relays to a DHCP server.

Apply

Click Apply to save your changes to the Switch’s run-time memory. The
Switch loses these changes if it is turned off or loses power, so use the
Save link on the top navigation panel to save your changes to the nonvolatile memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

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37.4.3 Global DHCP Relay Configuration Example
The follow figure shows a network example where the Switch is used to relay
DHCP requests for the VLAN1 and VLAN2 domains. There is only one DHCP
server that services the DHCP clients in both domains.

Figure 177 Global DHCP Relay Network Example
DHCP Server:
192.168.1.100

VLAN1

VLAN2

Configure the DHCP Relay screen as shown. Make sure you select the Option 82
check box to set the Switch to send additional information (such as the VLAN ID)
together with the DHCP requests to the DHCP server. This allows the DHCP server
to assign the appropriate IP address according to the VLAN ID.

Figure 178 DHCP Relay Configuration Example

EXAMPLE

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37.5 Configuring DHCP VLAN Settings
Use this screen to configure your DHCP settings based on the VLAN domain of the
DHCP clients. Click IP Application > DHCP in the navigation panel, then click the
VLAN link In the DHCP Status screen that displays.

Note: You must set up a management IP address for each VLAN that you want to
configure DHCP settings for on the Switch. See Section 8.6 on page 86 for
information on how to do this.
Figure 179 IP Application > DHCP > VLAN

The following table describes the labels in this screen.

Table 114 IP Application > DHCP > VLAN
LABEL

DESCRIPTION

VID

Enter the ID number of the VLAN to which these DHCP settings apply.

DHCP Status

Select whether the Switch should function as a DHCP Server or Relay for
the specified VID. If you select Server then fields related to DHCP relay
configuration are grayed out and vice versa.

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Table 114 IP Application > DHCP > VLAN (continued)
LABEL

DESCRIPTION

Server

Use this section if you want to configure the Switch to function as a DHCP
server for this VLAN.

Client IP
Pool
Starting
Address

Specify the first of the contiguous addresses in the IP address pool.

Size of
Client IP
Pool

Specify the size, or count of the IP address pool. The Switch can issue
from 1 to 253 IP addresses to DHCP clients.

IP Subnet
Mask

Enter the subnet mask for the client IP pool.

Default
Gateway

Enter the IP address of the default gateway device.

Primary/
Secondar
y DNS
Server

Enter the IP addresses of the DNS servers. The DNS servers are passed to
the DHCP clients along with the IP address and the subnet mask.

Relay

Use this section if you want to configure the Switch to function as a DHCP
relay for this VLAN.

Remote
DHCP
Server 1
.. 3

Enter the IP address of a DHCP server in dotted decimal notation.

Relay
Agent
Informati
on

Select the Option 82 check box to have the Switch add information (slot
number, port number and VLAN ID) to client DHCP requests that it relays
to a DHCP server.

Informati
on

This read-only field displays the system name you configure in the
General Setup screen.
Select the check box for the Switch to add the system name to the client
DHCP requests that it relays to a DHCP server.

Add

Click Add to save your changes to the Switch’s run-time memory. The
Switch loses these changes if it is turned off or loses power, so use the
Save link on the top navigation panel to save your changes to the nonvolatile memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

Clear

Click this to clear the fields above.

VID

This field displays the ID number of the VLAN group to which this DHCP
settings apply.

Type

This field displays Server or Relay for the DHCP mode.

DHCP Status

For DHCP server configuration, this field displays the starting IP address
and the size of the IP address pool.
For DHCP relay configuration, this field displays the first remote DHCP
server IP address.

314

Delete

Select the configuration entries you want to remove and click Delete to
remove them.

Cancel

Click Cancel to clear the Delete check boxes.

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37.5.1 Example: DHCP Relay for Two VLANs
The following example displays two VLANs (VIDs 1 and 2) for a campus network.
Two DHCP servers are installed to serve each VLAN. The system is set up to
forward DHCP requests from the dormitory rooms (VLAN 1) to the DHCP server
with an IP address of 192.168.1.100. Requests from the academic buildings (VLAN
2) are sent to the other DHCP server with an IP address of 172.23.10.100.

Figure 180 DHCP Relay for Two VLANs
DHCP:192.168.1.100

VLAN 1

VLAN 2

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For the example network, configure the VLAN Setting screen as shown.

Figure 181 DHCP Relay for Two VLANs Configuration Example

EXAMPLE

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CHAPTER

38
VRRP

This chapter shows you how to configure and monitor the Virtual Router
Redundancy Protocol (VRRP) on the Switch.

38.1 VRRP Overview
Each host on a network is configured to send packets to a statically configured
default gateway (this Switch). The default gateway can become a single point of
failure. Virtual Router Redundancy Protocol (VRRP), defined in RFC 2338, allows
you to create redundant backup gateways to ensure that the default gateway of a
host is always available.
In VRRP, a virtual router (VR) represents a number of physical layer-3 devices. An
IP address is associated with the virtual router. A layer-3 device having the same
IP address is the preferred master router while the other Layer-3 devices are the
backup routers. The master router forwards traffic for the virtual router. When the
master router becomes unavailable, a backup router assumes the role of the
master router until the master router comes back up and takes over.
The following figure shows a VRRP network example with the switches (A and B)
implementing one virtual router VR1 to ensure the link between the host X and
the uplink gateway G. Host X is configured to use VR1 (192.168.1.20) as the

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default gateway. If switch A has a higher priority, it is the master router. Switch B,
having a lower priority, is the backup router.

Figure 182 VRRP: Example 1

172.21.1.1

172.21.1.100
172.21.1.10

If switch A (the master router) is unavailable, switch B takes over. Traffic is then
processed by switch B.

38.2 VRRP Status
Click IP Application > VRRP in the navigation panel to display the VRRP Status
screen as shown next.

Figure 183 IP Application > VRRP Status

The following table describes the labels in this screen.

Table 115 IP Application > VRRP Status

318

LABEL

DESCRIPTION

Index

This field displays the index number of a rule.

Network

This field displays the IP address and the subnet mask bits of an IP routing
domain that is associated to a virtual router.

VRID

This field displays the ID number of the virtual router.

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Table 115 IP Application > VRRP Status (continued)
LABEL

DESCRIPTION

VR Status

This field displays the status of the virtual router.
This field is Master indicating that this Switch functions as the master
router.
This field is Backup indicating that this Switch functions as a backup
router.
This field displays Init when this Switch is initiating the VRRP protocol or
when the Uplink Status field displays Dead.

Uplink
Status

This field displays the status of the link between this Switch and the uplink
gateway.
This field is Alive indicating that the link between this Switch and the
uplink gateway is up. Otherwise, this field is Dead.
This field displays Probe when this Switch is check for the link state.

Poll
Interval(s)

The text box displays how often (in seconds) this screen refreshes. You
may change the refresh interval by typing a new number in the text box
and then clicking Set Interval.

Stop

Click Stop to halt system statistic polling.

38.3 VRRP Configuration
The following sections describe the different parts of the VRRP Configuration
screen.

38.3.1 IP Interface Setup
Before configuring VRRP, first create an IP interface (or routing domain) in the IP
Setup screen (see the Section 8.6 on page 86 for more information).
Click IP Application, VRRP and click the Configuration link to display the
VRRP Configuration screen as shown next.

Note: You can only configure VRRP on interfaces with unique VLAN IDs.

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Note: Routing domains with the same VLAN ID are not displayed in the table
indicated.
Figure 184 IP Application > VRRP Configuration > IP Interface

The following table describes the labels in this screen.

Table 116 IP Application > VRRP Configuration > IP Interface

320

LABEL

DESCRIPTION

Index

This field displays the index number of an entry.

Network

This field displays the IP address and number of subnet mask bit of an IP
domain.

Authenticati
on

Select None to disable authentication. This is the default setting.
Select Simple to use a simple password to authenticate VRRP packet
exchanges on this interface.

Key

When you select Simple in the Authentication field, enter a password
key (up to eight printable ASCII character long) in this field.

Apply

Click Apply to save your changes to the Switch’s run-time memory. The
Switch loses these changes if it is turned off or loses power, so use the
Save link on the top navigation panel to save your changes to the nonvolatile memory when you are done configuring.

Cancel

Click Cancel to discard all changes made in this table.

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38.3.2 VRRP Parameters
This section describes the VRRP parameters.

38.3.2.1 Advertisement Interval
The master router sends out Hello messages to let the other backup routers know
that it is still up and running. The time interval between sending the Hello
messages is the advertisement interval. By default, a Hello message is sent out
every second.
If the backup routers do not receive a Hello message from the master router after
this interval expires, it is assumed that the master router is down. Then the
backup router with the highest priority becomes the master router.

Note: All routers participating in the virtual router must use the same advertisement
interval.

38.3.2.2 Priority
Configure the priority level (1 to 254) to set which backup router to take over in
case the master router goes down. The backup router with the highest priority will
take over. The priority of the VRRP router that owns the IP address(es) associated
with the virtual router is 255.

38.3.2.3 Preempt Mode
If the master router is unavailable, a backup router assumes the role of the
master router. However, when another backup router with a higher priority joins
the network, it will preempt the lower priority backup router that is the master.
Disable preempt mode to prevent this from happening.
By default, a layer 3 device with the same IP address as the virtual router will
become the master router regardless of the preempt mode.

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38.3.3 Configuring VRRP Parameters
After you set up an IP interface, configure the VRRP parameters in the VRRP
Configuration screen.

Figure 185 IP Application > VRRP Configuration > VRRP Parameters

The following table describes the labels in this screen.

Table 117 IP Application > VRRP Configuration > VRRP Parameters
LABEL

DESCRIPTION

Active

Select this option to enable this VRRP entry.

Name

Enter a descriptive name (up to 32 printable ASCII characters) for
identification purposes.

Network

Select an IP domain to which this VRRP entry applies.

Virtual Router ID

Select a virtual router number (1 to 7) for which this VRRP entry is
created.
You can configure up to seven virtual routers for one network.

Advertisement
Interval

Specify the number of seconds between Hello message
transmissions. The default is 1.

Preempt Mode

Select this option to activate preempt mode.

Priority

Enter a number (between 1 and 254) to set the priority level. The
bigger the number, the higher the priority.
This field is 100 by default.

Uplink Gateway

Enter the IP address of the uplink gateway in dotted decimal
notation.
The Switch checks the link to the uplink gateway.

322

Primary Virtual IP

Enter the IP address of the primary virtual router in dotted decimal
notation.

Secondary Virtual
IP

This field is optional. Enter the IP address of a secondary virtual
router in dotted decimal notation. This field is ignored when you
enter 0.0.0.0.

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Table 117 IP Application > VRRP Configuration > VRRP Parameters (continued)
LABEL

DESCRIPTION

Add

Click Add to save your changes to the Switch’s run-time memory.
The Switch loses these changes if it is turned off or loses power, so
use the Save link on the top navigation panel to save your changes
to the non-volatile memory when you are done configuring.

Cancel

Click Cancel to discard all changes made in this table.

Clear

Click Clear to set the above fields back to the factory defaults.

38.3.4 Configuring VRRP Parameters
View the VRRP configuration summary at the bottom of the screen.

Figure 186 VRRP Configuration: Summary

The following table describes the labels in this screen.

Table 118 VRRP Configuring: VRRP Parameters
LABEL

DESCRIPTION

Index

This field displays the index number of an entry.

Active

This field shows whether a VRRP entry is enabled (Yes) or disabled (No).

Name

This field displays a descriptive name of an entry.

Network

This field displays the IP address and subnet mask of an interface.

VRID

This field displays the ID number of a virtual router.

Primary VIP

This field displays the IP address of the primary virtual router.

Uplink
Gateway

This field displays the IP address of the uplink gateway.

Priority

This field displays the priority level (1 to 255) of the entry.

Delete

Click Delete to remove the selected entry from the summary table.

Cancel

Click Cancel to clear the Delete check boxes.

38.4 VRRP Configuration Examples
The following sections show two VRRP configuration examples on the Switch.

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38.4.1 One Subnet Network Example
The figure below shows a simple VRRP network with only one virtual router VR1
(VRID =1) and two switches. The network is connected to the WAN via an uplink
gateway G (172.21.1.100). The host computer X is set to use VR1 as the default
gateway.

Figure 187 VRRP Configuration Example: One Virtual Router Network

172.21.1.1

172.21.1.100
172.21.1.10

You want to set switch A as the master router. Configure the VRRP parameters in
the VRRP Configuration screens on the switches as shown in the figures below.

Figure 188 VRRP Example 1: VRRP Parameter Settings on Switch A

EXAMPLE

Figure 189 VRRP Example 1: VRRP Parameter Settings on Switch B

EXAMPLE

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After configuring and saving the VRRP configuration, the VRRP Status screens for
both switches are shown next.

Figure 190 VRRP Example 1: VRRP Status on Switch A

EXAMPLE

Figure 191 VRRP Example 1: VRRP Status on Switch B

EXAMPLE

38.4.2 Two Subnets Example
The following figure depicts an example in which two switches share the network
traffic. Hosts in the two network groups use different default gateways. Each
switch is configured to backup a virtual router using VRRP.
You wish to configure switch A as the master router for virtual router VR1 and as
a backup for virtual router VR2. On the other hand, switch B is the master for
VR2 and a backup for VR1.

Figure 192 VRRP Configuration Example: Two Virtual Router Network

172.21.1.1

172.21.1.100

172.21.1.10

You need to configure the VRRP Configuration screen for virtual router VR2 on
each switch, while keeping the VRRP configuration in example 1 for virtual router

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VR1 (refer to Section 38.4.2 on page 325). Configure the VRRP parameters on the
switches as shown in the figures below.

Figure 193 VRRP Example 2: VRRP Parameter Settings for VR2 on Switch A

EXAMPLE

Figure 194 VRRP Example 2: VRRP Parameter Settings for VR2 on Switch B

EXAMPLE
After configuring and saving the VRRP configuration, the VRRP Status screens for
both switches are shown next.

Figure 195 VRRP Example 2: VRRP Status on Switch A

EXAMPLE

Figure 196 VRRP Example 2: VRRP Status on Switch B

EXAMPLE

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P ART V
Management
Maintenance (329)
Access Control (337)
Diagnostic (357)
Syslog (359)
Cluster Management (363)
MAC Table (371)
IP Table (375)
ARP Table (379)
Routing Table (381)
Configure Clone (383)

327

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CHAPTER

39
Maintenance

This chapter explains how to configure the maintenance screens that let you
maintain the firmware and configuration files.

39.1 The Maintenance Screen
Use this screen to manage firmware and your configuration files. Click
Management > Maintenance in the navigation panel to open the following
screen.

Figure 197

Management > Maintenance

The following table describes the labels in this screen.

Table 119 Management > Maintenance
LABEL

DESCRIPTION

Current

This field displays which configuration (Configuration 1 or Configuration
2) is currently operating on the Switch.

Firmware
Upgrade

Click Click Here to go to the Firmware Upgrade screen.

Restore
Configurati
on

Click Click Here to go to the Restore Configuration screen.

Backup
Configurati
on

Click Click Here to go to the Backup Configuration screen.

Load
Factory
Default

Click Click Here to reset the configuration to the factory default settings.

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Table 119 Management > Maintenance (continued)
LABEL

DESCRIPTION

Save
Configurati
on

Click Config 1 to save the current configuration settings to Configuration
1 on the Switch.

Reboot
System

Click Config 1 to reboot the system and load Configuration 1 on the
Switch.

Click Config 2 to save the current configuration settings to Configuration
2 on the Switch.

Click Config 2 to reboot the system and load Configuration 2 on the
Switch.

Note: Make sure to click the Save button in any screen to save your
settings to the current configuration on the Switch.

39.2 Load Factory Default
Follow the steps below to reset the Switch back to the factory defaults.
1

2

In the Maintenance screen, click the Click Here button next to Load Factory
Default to clear all Switch configuration information you configured and return to
the factory defaults.
Click OK to reset all Switch configurations to the factory defaults.

Figure 198 Load Factory Default: Start

3

In the web configurator, click the Save button to make the changes take effect. If
you want to access the Switch web configurator again, you may need to change
the IP address of your computer to be in the same subnet as that of the default
Switch IP address (192.168.1.1).

39.3 Save Configuration
Click Config 1 to save the current configuration settings permanently to
Configuration 1 on the Switch.

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Click Config 2 to save the current configuration settings to Configuration 2 on
the Switch.
Alternatively, click Save on the top right-hand corner in any screen to save the
configuration changes to the current configuration.

Note: Clicking the Apply or Add button does NOT save the changes permanently. All
unsaved changes are erased after you reboot the Switch.

39.4 Reboot System
Reboot System allows you to restart the Switch without physically turning the
power off. It also allows you to load configuration one (Config 1) or configuration
two (Config 2) when you reboot. Follow the steps below to reboot the Switch.
1

In the Maintenance screen, click the Config 1 button next to Reboot System to
reboot and load configuration one. The following screen displays.

Figure 199 Reboot System: Confirmation

2

Click OK again and then wait for the Switch to restart. This takes up to two
minutes. This does not affect the Switch’s configuration.
Click Config 2 and follow steps 1 to 2 to reboot and load configuration two on the
Switch.

39.5 Firmware Upgrade
Make sure you have downloaded (and unzipped) the correct model firmware and
version to your computer before uploading to the device.

Be sure to upload the correct model firmware as uploading the
wrong model firmware may damage your device.

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From the Maintenance screen, display the Firmware Upgrade screen as shown
next.

Figure 200

Management > Maintenance > Firmware Upgrade

Type the path and file name of the firmware file you wish to upload to the Switch
in the File Path text box or click Browse to locate it. Select the Rebooting
checkbox if you want to reboot the Switch and apply the new firmware
immediately. (Firmware upgrades are only applied after a reboot). Click Upgrade
to load the new firmware.
After the firmware upgrade process is complete, see the System Info screen to
verify your current firmware version number.

39.6 Restore a Configuration File
Restore a previously saved configuration from your computer to the Switch using
the Restore Configuration screen.

Figure 201 Management > Maintenance > Restore Configuration

Type the path and file name of the configuration file you wish to restore in the File
Path text box or click Browse to display the Choose File screen from which you
can locate it. After you have specified the file, click Restore. "config" is the name
of the configuration file on the Switch, so your backup configuration file is
automatically renamed when you restore using this screen.

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39.7 Backup a Configuration File
Backing up your Switch configurations allows you to create various “snapshots” of
your device from which you may restore at a later date.
Back up your current Switch configuration to a computer using the Backup
Configuration screen.

Figure 202 Management > Maintenance > Backup Configuration

Follow the steps below to back up the current Switch configuration to your
computer in this screen.
1

Click Backup.

2

Click Save to display the Save As screen.

3

Choose a location to save the file on your computer from the Save in drop-down
list box and type a descriptive name for it in the File name list box. Click Save to
save the configuration file to your computer.

39.8 FTP Command Line
This section shows some examples of uploading to or downloading files from the
Switch using FTP commands. First, understand the filename conventions.

39.8.1 Filename Conventions
The configuration file (also known as the romfile or ROM) contains the factory
default settings in the screens such as password, Switch setup, IP Setup, and so
on. Once you have customized the Switch’s settings, they can be saved back to
your computer under a filename of your choosing.

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ZyNOS (ZyXEL Network Operating System, sometimes referred to as the “ras” file)
is the system firmware and has a “bin” filename extension.

Table 120 Filename Conventions
INTERNA
L NAME

EXTERNA
L NAME

Configuration
File

config

.cfg

This is the configuration (config) filename on
the Switch. Uploading the config file replaces
the specified configuration file system,
including your Switch configurations, systemrelated data (including the default password),
the error log and the trace log.

Firmware

ras

*.bin

This is the generic name for the ZyNOS
firmware on the Switch.

FILE TYPE

DESCRIPTION

39.8.1.1 Example FTP Commands
ftp> put firmware.bin ras

This is a sample FTP session showing the transfer of the computer file
"firmware.bin" to the Switch.
ftp> get config config.cfg

This is a sample FTP session saving the current configuration to a file called
“config.cfg” on your computer.
If your (T)FTP client does not allow you to have a destination filename different
than the source, you will need to rename them as the Switch only recognizes
“config” and “ras”. Be sure you keep unaltered copies of both files for later use.

Be sure to upload the correct model firmware as uploading the
wrong model firmware may damage your device.

39.8.2 FTP Command Line Procedure

334

1

Launch the FTP client on your computer.

2

Enter open, followed by a space and the IP address of your Switch.

3

Press [ENTER] when prompted for a username.

4

Enter your password as requested (the default is “1234”).

5

Enter bin to set transfer mode to binary.

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6

Use put to transfer files from the computer to the Switch, for example, put
firmware.bin ras transfers the firmware on your computer (firmware.bin) to the
Switch and renames it to “ras”. Similarly, put config.cfg config transfers the
configuration file on your computer (config.cfg) to the Switch and renames it to
“config”. Likewise get config config.cfg transfers the configuration file on the
Switch to your computer and renames it to “config.cfg”. See Table 120 on page
334 for more information on filename conventions.

7

Enter quit to exit the ftp prompt.

39.8.3 GUI-based FTP Clients
The following table describes some of the commands that you may see in GUIbased FTP clients.

Table 121 General Commands for GUI-based FTP Clients
COMMAND

DESCRIPTION

Host Address

Enter the address of the host server.

Login Type

Anonymous.
This is when a user I.D. and password is automatically supplied to
the server for anonymous access. Anonymous logins will work only
if your ISP or service administrator has enabled this option.
Normal.
The server requires a unique User ID and Password to login.

Transfer Type

Transfer files in either ASCII (plain text format) or in binary mode.
Configuration and firmware files should be transferred in binary
mode.

Initial Remote
Directory

Specify the default remote directory (path).

Initial Local
Directory

Specify the default local directory (path).

39.8.4 FTP Restrictions
FTP will not work when:
• FTP service is disabled in the Service Access Control screen.
• The IP address(es) in the Remote Management screen does not match the
client IP address. If it does not match, the Switch will disconnect the FTP session
immediately.

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CHAPTER

40

Access Control
This chapter describes how to control access to the Switch.

40.1 Access Control Overview
A console port and FTP are allowed one session each, Telnet and SSH share nine
sessions, up to five Web sessions (five different usernames and passwords) and/or
limitless SNMP access control sessions are allowed.

Table 122 Access Control Overview
Console Port

SSH

Telnet

One session

Share up to nine
sessions

FTP

Web

SNMP

One session

Up to five
accounts

No limit

A console port access control session and Telnet access control session cannot
coexist when multi-login is disabled. See the Ethernet Switch CLI Reference Guide
for more information on disabling multi-login.

40.2 The Access Control Main Screen
Click Management > Access Control in the navigation panel to display the main
screen as shown.

Figure 203 Management > Access Control

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40.3 About SNMP
Simple Network Management Protocol (SNMP) is an application layer protocol
used to manage and monitor TCP/IP-based devices. SNMP is used to exchange
management information between the network management system (NMS) and a
network element (NE). A manager station can manage and monitor the Switch
through the network via SNMP version one (SNMPv1), SNMP version 2c or SNMP
version 3. The next figure illustrates an SNMP management operation. SNMP is
only available if TCP/IP is configured.

Figure 204 SNMP Management Model

An SNMP managed network consists of two main components: agents and a
manager.
An agent is a management software module that resides in a managed Switch
(the Switch). An agent translates the local management information from the
managed Switch into a form compatible with SNMP. The manager is the console
through which network administrators perform network management functions. It
executes applications that control and monitor managed devices.
The managed devices contain object variables/managed objects that define each
piece of information to be collected about a Switch. Examples of variables include
number of packets received, node port status and so on. A Management
Information Base (MIB) is a collection of managed objects. SNMP allows a
manager and agents to communicate for the purpose of accessing these objects.

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SNMP itself is a simple request/response protocol based on the manager/agent
model. The manager issues a request and the agent returns responses using the
following protocol operations:

Table 123 SNMP Commands
COMMAND

DESCRIPTION

Get

Allows the manager to retrieve an object variable from the agent.

GetNext

Allows the manager to retrieve the next object variable from a table or list
within an agent. In SNMPv1, when a manager wants to retrieve all
elements of a table from an agent, it initiates a Get operation, followed by a
series of GetNext operations.

Set

Allows the manager to set values for object variables within an agent.

Trap

Used by the agent to inform the manager of some events.

40.3.1 SNMP v3 and Security
SNMP v3 enhances security for SNMP management. SNMP managers can be
required to authenticate with agents before conducting SNMP management
sessions.
Security can be further enhanced by encrypting the SNMP messages sent from the
managers. Encryption protects the contents of the SNMP messages. When the
contents of the SNMP messages are encrypted, only the intended recipients can
read them.

40.3.2 Supported MIBs
MIBs let administrators collect statistics and monitor status and performance.
The Switch supports the following MIBs:
• SNMP MIB II (RFC 1213)
• RFC 1157 SNMP v1
• RFC 1493 Bridge MIBs
• RFC 1643 Ethernet MIBs
• RFC 1155 SMI
• RFC 2674 SNMPv2, SNMPv2c
• RFC 1757 RMON
• SNMPv2, SNMPv2c or later version, compliant with RFC 2011 SNMPv2 MIB for
IP, RFC 2012 SNMPv2 MIB for TCP, RFC 2013 SNMPv2 MIB for UDP

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40.3.3 SNMP Traps
The Switch sends traps to an SNMP manager when an event occurs. The following
tables outline the SNMP traps by category.
An OID (Object ID) that begins with “1.3.6.1.4.1.890.1.5.8.” is defined in private
MIBs. Otherwise, it is a standard MIB OID.
The OIDs beginning with “1.3.6.1.4.1.890.1.5.8.46” are specific to the XGS4728F switch.

Table 124 SNMP System Traps
OPTION

OBJECT LABEL

OBJECT ID

DESCRIPTION

coldstart

coldStart

1.3.6.1.6.3.1.1.5.1

This trap is sent when the
Switch is turned on.

warmstart

warmStart

1.3.6.1.6.3.1.1.5.2

This trap is sent when the
Switch restarts.

fanspeed

FanSpeedEventOn

1.3.6.1.4.1.890.1.5.8.46.3
1.2.1

This trap is sent when the fan
speed goes above or below the
normal operating range.

FanSpeedEventClear

1.3.6.1.4.1.890.1.5.8.46.3
1.2.2

This trap is sent when the fan
speed returns to the normal
operating range.

temperatur TemperatureEventOn
e

1.3.6.1.4.1.890.1.5.8.46.3
1.2.1

This trap is sent when the
temperature goes above or
below the normal operating
range.

TemperatureEventClear

1.3.6.1.4.1.890.1.5.8.46.3
1.2.2

This trap is sent when the
temperature returns to the
normal operating range.

VoltageEventOn

1.3.6.1.4.1.890.1.5.8.46.3
1.2.1

This trap is sent when the
voltage goes above or below the
normal operating range.

VoltageEventClear

1.3.6.1.4.1.890.1.5.8.46.3
1.2.2

This trap is sent when the
voltage returns to the normal
operating range.

voltage

reset

340

UncontrolledResetEventOn 1.3.6.1.4.1.890.1.5.8.46.3
1.2.1

This trap is sent when the
Switch automatically resets.

ControlledResetEventOn

1.3.6.1.4.1.890.1.5.8.46.3
1.2.1

This trap is sent when the
Switch resets by an
administrator through a
management interface.

RebootEvent

1.3.6.1.4.1.890.1.5.1.1.2

This trap is sent when the
Switch reboots by an
administrator through a
management interface.

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Table 124 SNMP System Traps (continued)
OPTION

OBJECT LABEL

OBJECT ID

DESCRIPTION

timesync

RTCNotUpdatedEventOn

1.3.6.1.4.1.890.1.5.8.46.3
1.2.1

This trap is sent when the
Switch fails to get the time and
date from a time server.

RTCNotUpdatedEventClear 1.3.6.1.4.1.890.1.5.8.46.3
1.2.2

This trap is sent when the
Switch gets the time and date
from a time server.

intrusionlo
ck

IntrusionLockEventOn

1.3.6.1.4.1.890.1.5.8.46.3
1.2.1

This trap is sent when intrusion
lock occurs on a port.

loopguard

LoopguardEventOn

1.3.6.1.4.1.890.1.5.8.46.3
1.2.1

This trap is sent when loopguard
shuts down a port.

Table 125 SNMP InterfaceTraps
OPTION

OBJECT LABEL

OBJECT ID

DESCRIPTION

linkup

linkUp

1.3.6.1.6.3.1.1.5.4

This trap is sent when the
Ethernet link is up.

LinkDownEventClear

1.3.6.1.4.1.890.1.5.8.46.31 This trap is sent when the
.2.2
Ethernet link is up.

linkDown

1.3.6.1.6.3.1.1.5.3

LinkDownEventOn

1.3.6.1.4.1.890.1.5.8.46.31 This trap is sent when the
.2.1
Ethernet link is down.

linkdown

autonegotiati
on

This trap is sent when the
Ethernet link is down.

AutonegotiationFailedEven 1.3.6.1.4.1.890.1.5.8.46.31 This trap is sent when an
tOn
.2.1
Ethernet interface fails to
auto-negotiate with the peer
Ethernet interface.
AutonegotiationFailedEven 1.3.6.1.4.1.890.1.5.8.46.31 This trap is sent when an
tClear
.2.2
Ethernet interface autonegotiates with the peer
Ethernet interface.

lldp

lldp

1.0.8802.1.1.2.0.0.1

The trap is sent when
entries in the remote
database have any updates.
Link Layer Discovery
Protocol (LLDP), defined as
IEEE 802.1ab, enables LAN
devices that support LLDP to
exchange their configured
settings. This helps
eliminate configuration
mismatch issues.

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Table 125 SNMP InterfaceTraps (continued)
OPTION

OBJECT LABEL

OBJECT ID

transceiverddm

DDMIRxPowerEventOn

1.3.6.1.4.1.890.1.5.8.46.31 This trap is sent when one of
.2.1
the device operating
parameters (such as
transceiver temperature,
laser bias current,
transmitted optical power,
received optical power and
transceiver supply voltage)
is above or below a factory
set normal range.

DDMITemperatureEventO
n
DDMITxBiasEventOn
DDMITxPowerEventOn
DDMIVoltageEventOn

DESCRIPTION

1.3.6.1.4.1.890.1.5.8.46.31 This trap is sent when all
.2.2
device operating parameters
DDMITemperatureEventCl
return to the normal
ear
operating range.
DDMIRxPowerEventClear

DDMITxBiasEventClear
DDMITxPowerEventClear
DDMIVoltageEventClear

Table 126 AAA Traps
OPTION

OBJECT LABEL

authenticatio authenticationFailure
n

OBJECT ID

DESCRIPTION

1.3.6.1.6.3.1.1.5.5

This trap is sent when
authentication fails due to
incorrect user name and/or
password.

AuthenticationFailureEven 1.3.6.1.4.1.890.1.5.8.46.3 This trap is sent when
tOn
1.2.1
authentication fails due to
incorrect user name and/or
password.

accounting

RADIUSNotReachableEve
ntOn

1.3.6.1.4.1.890.1.5.8.46.3 This trap is sent when there is
1.2.1
no response message from the
RADIUS server.

RADIUSNotReachableEve
ntClear

1.3.6.1.4.1.890.1.5.8.46.3 This trap is sent when the
1.2.2
RADIUS server can be
reached.

RADIUSAcctNotReachable 1.3.6.1.4.1.890.1.5.8.46.3 This trap is sent when there is
EventOn
1.2.1
no response message from the
RADIUS accounting server.
RADIUSAcctNotReachable 1.3.6.1.4.1.890.1.5.8.46.3 This trap is sent when the
EventClear
1.2.2
RADIUS accounting server can
be reached.

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Table 127 SNMP IP Traps
OPTION

OBJECT LABEL

OBJECT ID

DESCRIPTION

ping

pingProbeFailed

1.3.6.1.2.1.80.0.1

This trap is sent when a single ping
probe fails.

pingTestFailed

1.3.6.1.2.1.80.0.2

This trap is sent when a ping test
(consisting of a series of ping probes)
fails.

pingTestCompleted

1.3.6.1.2.1.80.0.3

This trap is sent when a ping test is
completed.

traceRouteTestFailed

1.3.6.1.2.1.81.0.2

This trap is sent when a traceroute
test fails.

traceRouteTestCompleted

1.3.6.1.2.1.81.0.3

This trap is sent when a traceroute
test is completed.

traceroute

Table 128 SNMP Switch Traps
OPTION

OBJECT LABEL

OBJECT ID

DESCRIPTION

stp

STPNewRoot

1.3.6.1.2.1.17.0.1

This trap is sent when the STP
root switch changes.

MRSTPNewRoot

1.3.6.1.4.1.890.1.5.8.46.4
3.2.1

This trap is sent when the
MRSTP root switch changes.

MSTPNewRoot

1.3.6.1.4.1.890.1.5.8.46.1
07.70.1

This trap is sent when the MSTP
root switch changes.

STPTopologyChange

1.3.6.1.2.1.17.0.2

This trap is sent when the STP
topology changes.

MRSTPTopologyChange

1.3.6.1.4.1.890.1.5.8.46.4
3.2.2

This trap is sent when the
MRSTP topology changes.

MSTPTopologyChange

1.3.6.1.4.1.890.1.5.8.46.1
07.70.2

This trap is sent when the MSTP
root switch changes.

MacTableFullEventOn

1.3.6.1.4.1.890.1.5.8.46.3
1.2.1

This trap is sent when more
than 99% of the MAC table is
used.

MacTableFullEventClear

1.3.6.1.4.1.890.1.5.8.46.3
1.2.2

This trap is sent when less than
95% of the MAC table is used.

RmonRisingAlarm

1.3.6.1.4.1.890.1.5.1.1.16
.0.1

This trap is sent when a variable
goes over the RMON "rising"
threshold.

RmonFallingAlarm

1.3.6.1.4.1.890.1.5.1.1.16
.0.2

This trap is sent when the
variable falls below the RMON
"falling" threshold.

dot1agCfmFaultAlarm

1.3.111.2.802.1.1.8.0.1

The trap is sent when the
Switch detects a connectivity
fault.

mactable

rmon

cfm

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40.3.4 Configuring SNMP
From the Access Control screen, display the SNMP screen. You can click Access
Control to go back to the Access Control screen.

Figure 205 Management > Access Control > SNMP

The following table describes the labels in this screen.

Table 129 Management > Access Control > SNMP
LABEL

DESCRIPTION

General Setting

Use this section to specify the SNMP version and community (password)
values.

Version

Select the SNMP version for the Switch. The SNMP version on the Switch
must match the version on the SNMP manager. Choose SNMP version 2c
(v2c), SNMP version 3 (v3) or both (v3v2c).

Note: SNMP version 2c is backwards compatible with SNMP
version 1.
Get Community

Enter the Get Community string, which is the password for the
incoming Get- and GetNext- requests from the management station.
The Get Community string is only used by SNMP managers using
SNMP version 2c or lower.

Set Community

Enter the Set Community, which is the password for incoming Setrequests from the management station.
The Set Community string is only used by SNMP managers using
SNMP version 2c or lower.

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Table 129 Management > Access Control > SNMP (continued)
LABEL

DESCRIPTION

Trap
Community

Enter the Trap Community string, which is the password sent with
each trap to the SNMP manager.
The Trap Community string is only used by SNMP managers using
SNMP version 2c or lower.

Trap
Destination

Use this section to configure where to send SNMP traps from the Switch.

Version

Specify the version of the SNMP trap messages.

IP

Enter the IP addresses of up to four managers to send your SNMP traps
to.

Port

Enter the port number upon which the manager listens for SNMP traps.

Username

Enter the username to be sent to the SNMP manager along with the
SNMP v3 trap.

Note: This username must match an existing account on the Switch
(configured in Management > Access Control > Logins
screen).
User
Information

Use this section to configure users for authentication with managers
using SNMP v3.

Note: Use the username and password of the login accounts you
specify in this section to create accounts on the SNMP v3
manager.
Index

This is a read-only number identifying a login account on the Switch.

Username

This field displays the username of a login account on the Switch.

Security
Level

Select whether you want to implement authentication and/or encryption
for SNMP communication from this user. Choose:
•
•
•

noauth -to use the username as the password string to send to the
SNMP manager. This is equivalent to the Get, Set and Trap
Community in SNMP v2c. This is the lowest security level.
auth - to implement an authentication algorithm for SNMP messages
sent by this user.
priv - to implement authentication and encryption for SNMP
messages sent by this user. This is the highest security level.

Note: The settings on the SNMP manager must be set at the same
security level or higher than the security level settings on the
Switch.
Authenticati
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Select an authentication algorithm. MD5 (Message Digest 5) and SHA
(Secure Hash Algorithm) are hash algorithms used to authenticate
SNMP data. SHA authentication is generally considered stronger than
MD5, but is slower.

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Table 129 Management > Access Control > SNMP (continued)
LABEL
Privacy

DESCRIPTION
Specify the encryption method for SNMP communication from this user.
You can choose one of the following:
•
•

DES - Data Encryption Standard is a widely used (but breakable)
method of data encryption. It applies a 56-bit key to each 64-bit
block of data.
AES - Advanced Encryption Standard is another method for data
encryption that also uses a secret key. AES applies a 128-bit key to
128-bit blocks of data.

Apply

Click Apply to save your changes to the Switch’s run-time memory. The
Switch loses these changes if it is turned off or loses power, so use the
Save link on the top navigation panel to save your changes to the nonvolatile memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

40.3.5 Configuring SNMP Trap Group
From the SNMP screen, click Trap Group to view the screen as shown. Use the
Trap Group screen to specify the types of SNMP traps that should be sent to each
SNMP manager.

Figure 206 Management > Access Control > SNMP > Trap Group

The following table describes the labels in this screen.

Table 130 Management > Access Control > SNMP > Trap Group
LABEL

DESCRIPTION

Trap
Destination IP

Select one of your configured trap destination IP addresses. These are
the IP addresses of the SNMP managers. You must first configure a trap
destination IP address in the SNMP Setting screen.
Use the rest of the screen to select which traps the Switch sends to that
SNMP manager.

Type

346

Select the categories of SNMP traps that the Switch is to send to the
SNMP manager.

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Table 130 Management > Access Control > SNMP > Trap Group (continued)
LABEL

DESCRIPTION

Options

Select the individual SNMP traps that the Switch is to send to the SNMP
station. See Section 40.3.3 on page 340 for individual trap descriptions.
The traps are grouped by category. Selecting a category automatically
selects all of the category’s traps. Clear the check boxes for individual
traps that you do not want the Switch to send to the SNMP station.
Clearing a category’s check box automatically clears all of the category’s
trap check boxes (the Switch only sends traps from selected categories).

Apply

Click Apply to save your changes to the Switch’s run-time memory. The
Switch loses these changes if it is turned off or loses power, so use the
Save link on the top navigation panel to save your changes to the nonvolatile memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

40.3.6 Setting Up Login Accounts
Up to five people (one administrator and four non-administrators) may access the
Switch via web configurator at any one time.
• An administrator is someone who can both view and configure Switch changes.
The username for the Administrator is always admin. The default administrator
password is 1234.

Note: It is highly recommended that you change the default administrator password
(1234).
• A non-administrator (username is something other than admin) is someone
who can view but not configure Switch settings.
Click Management > Access Control > Logins to view the screen as shown.

Figure 207 Management > Access Control > Logins

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The following table describes the labels in this screen.

Table 131 Management > Access Control > Logins
LABEL

DESCRIPTION

Administrator
This is the default administrator account with the “admin” user name. You cannot change
the default administrator user name. Only the administrator has read/write access.
Old Password

Type the existing system password (1234 is the default password
when shipped).

New Password

Enter your new system password.

Retype to
confirm

Retype your new system password for confirmation

Edit Logins
You may configure passwords for up to four users. These users have read-only access.
You can give users higher privileges via the CLI. For more information on assigning
privileges see the Ethernet Switch CLI Reference Guide.
User Name

Set a user name (up to 32 ASCII characters long).

Password

Enter your new system password.

Retype to
confirm

Retype your new system password for confirmation

Apply

Click Apply to save your changes to the Switch’s run-time memory.
The Switch loses these changes if it is turned off or loses power, so
use the Save link on the top navigation panel to save your changes
to the non-volatile memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

40.4 SSH Overview
Unlike Telnet or FTP, which transmit data in clear text, SSH (Secure Shell) is a
secure communication protocol that combines authentication and data encryption
to provide secure encrypted communication between two hosts over an unsecured
network.

Figure 208 SSH Communication Example

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40.5 How SSH works
The following table summarizes how a secure connection is established between
two remote hosts.

Figure 209 How SSH Works

1

Host Identification
The SSH client sends a connection request to the SSH server. The server identifies
itself with a host key. The client encrypts a randomly generated session key with
the host key and server key and sends the result back to the server.
The client automatically saves any new server public keys. In subsequent
connections, the server public key is checked against the saved version on the
client computer.

2

Encryption Method
Once the identification is verified, both the client and server must agree on the
type of encryption method to use.

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3

Authentication and Data Transmission
After the identification is verified and data encryption activated, a secure tunnel is
established between the client and the server. The client then sends its
authentication information (user name and password) to the server to log in to the
server.

40.6 SSH Implementation on the Switch
Your Switch supports SSH version 2 using RSA authentication and three
encryption methods (DES, 3DES and Blowfish). The SSH server is implemented on
the Switch for remote management and file transfer on port 22. Only one SSH
connection is allowed at a time.

40.6.1 Requirements for Using SSH
You must install an SSH client program on a client computer (Windows or Linux
operating system) that is used to connect to the Switch over SSH.

40.7 Introduction to HTTPS
HTTPS (HyperText Transfer Protocol over Secure Socket Layer, or HTTP over SSL)
is a web protocol that encrypts and decrypts web pages. Secure Socket Layer
(SSL) is an application-level protocol that enables secure transactions of data by
ensuring confidentiality (an unauthorized party cannot read the transferred data),
authentication (one party can identify the other party) and data integrity (you
know if data has been changed).
It relies upon certificates, public keys, and private keys.
HTTPS on the Switch is used so that you may securely access the Switch using the
web configurator. The SSL protocol specifies that the SSL server (the Switch) must
always authenticate itself to the SSL client (the computer which requests the
HTTPS connection with the Switch), whereas the SSL client only should
authenticate itself when the SSL server requires it to do so. Authenticating client
certificates is optional and if selected means the SSL-client must send the Switch a
certificate. You must apply for a certificate for the browser from a Certificate
Authority (CA) that is a trusted CA on the Switch.
Please refer to the following figure.

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1

HTTPS connection requests from an SSL-aware web browser go to port 443 (by
default) on the Switch’s WS (web server).

2

HTTP connection requests from a web browser go to port 80 (by default) on the
Switch’s WS (web server).

Figure 210 HTTPS Implementation

Note: If you disable HTTP in the Service Access Control screen, then the Switch
blocks all HTTP connection attempts.

40.8 HTTPS Example
If you haven’t changed the default HTTPS port on the Switch, then in your browser
enter “https://Switch IP Address/” as the web site address where “Switch IP
Address” is the IP address or domain name of the Switch you wish to access.

40.8.1 Internet Explorer Warning Messages
When you attempt to access the Switch HTTPS server, a Windows dialog box pops
up asking if you trust the server certificate. Click View Certificate if you want to
verify that the certificate is from the Switch.

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You see the following Security Alert screen in Internet Explorer. Select Yes to
proceed to the web configurator login screen; if you select No, then web
configurator access is blocked.

Figure 211 Security Alert Dialog Box (Internet Explorer)

40.8.2 Netscape Navigator Warning Messages
When you attempt to access the Switch HTTPS server, a Website Certified by an
Unknown Authority screen pops up asking if you trust the server certificate.
Click Examine Certificate if you want to verify that the certificate is from the
Switch.
If Accept this certificate temporarily for this session is selected, then click
OK to continue in Netscape.

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Select Accept this certificate permanently to import the Switch’s certificate
into the SSL client.

Figure 212 Security Certificate 1 (Netscape)

EXAMPLE
EXAMPLE
EXAMPLE

Figure 213 Security Certificate 2 (Netscape)

EXAMPLE

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40.8.3 The Main Screen
After you accept the certificate and enter the login username and password, the
Switch main screen appears. The lock displayed in the bottom right of the browser
status bar denotes a secure connection.

Figure 214 Example: Lock Denoting a Secure Connection

40.9 Service Port Access Control
Service Access Control allows you to decide what services you may use to access
the Switch. You may also change the default service port and configure “trusted

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computer(s)” for each service in the Remote Management screen (discussed
later). Click Access Control to go back to the main Access Control screen.

Figure 215 Management > Access Control > Service Access Control

The following table describes the fields in this screen.

Table 132 Management > Access Control > Service Access Control
LABEL

DESCRIPTION

Services

Services you may use to access the Switch are listed here.

Active

Select this option for the corresponding services that you want to allow to
access the Switch.

Service
Port

For Telnet, SSH, FTP, HTTP or HTTPS services, you may change the default
service port by typing the new port number in the Server Port field. If you
change the default port number then you will have to let people (who wish
to use the service) know the new port number for that service.

Timeout

Type how many minutes a management session (via the web configurator)
can be left idle before the session times out. After it times out you have to
log in with your password again. Very long idle timeouts may have security
risks.

Apply

Click Apply to save your changes to the Switch’s run-time memory. The
Switch loses these changes if it is turned off or loses power, so use the Save
link on the top navigation panel to save your changes to the non-volatile
memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

40.10 Remote Management
From the Access Control screen, display the Remote Management screen as
shown next.

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You can specify a group of one or more “trusted computers” from which an
administrator may use a service to manage the Switch. Click Access Control to
return to the Access Control screen.

Figure 216 Management > Access Control > Remote Management

The following table describes the labels in this screen.

Table 133 Management > Access Control > Remote Management

356

LABEL

DESCRIPTION

Entry

This is the client set index number. A “client set” is a group of one or more
“trusted computers” from which an administrator may use a service to
manage the Switch.

Active

Select this check box to activate this secured client set. Clear the check
box if you wish to temporarily disable the set without deleting it.

Start
Address

Configure the IP address range of trusted computers from which you can
manage this Switch.

End Address

The Switch checks if the client IP address of a computer requesting a
service or protocol matches the range set here. The Switch immediately
disconnects the session if it does not match.

Telnet/FTP/
HTTP/ICMP/
SNMP/SSH/
HTTPS

Select services that may be used for managing the Switch from the
specified trusted computers.

Apply

Click Apply to save your changes to the Switch’s run-time memory. The
Switch loses these changes if it is turned off or loses power, so use the
Save link on the top navigation panel to save your changes to the nonvolatile memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

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41
Diagnostic

This chapter explains the Diagnostic screen.

41.1 Diagnostic
Click Management > Diagnostic in the navigation panel to open this screen. Use
this screen to check system logs, ping IP addresses or perform port tests.

Figure 217 Management > Diagnostic

The following table describes the labels in this screen.

Table 134 Management > Diagnostic
LABEL

DESCRIPTION

System Log

Click Display to display a log of events in the multi-line text box.
Click Clear to empty the text box and reset the syslog entry.

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Table 134 Management > Diagnostic (continued)
LABEL

DESCRIPTION

IP Ping

Type the IP address of a device that you want to ping in order to test a
connection.
Click Ping to have the Switch ping the IP address (in the field to the
left).

Ethernet Port
Test

358

Enter a port number and click Port Test to perform an internal
loopback test.

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42
Syslog

This chapter explains the syslog screens.

42.1 Syslog Overview
The syslog protocol allows devices to send event notification messages across an
IP network to syslog servers that collect the event messages. A syslog-enabled
device can generate a syslog message and send it to a syslog server.
Syslog is defined in RFC 3164. The RFC defines the packet format, content and
system log related information of syslog messages. Each syslog message has a
facility and severity level. The syslog facility identifies a file in the syslog server.
Refer to the documentation of your syslog program for details. The following table
describes the syslog severity levels.

Table 135 Syslog Severity Levels
CODE

SEVERITY

0

Emergency: The system is unusable.

1

Alert: Action must be taken immediately.

2

Critical: The system condition is critical.

3

Error: There is an error condition on the system.

4

Warning: There is a warning condition on the system.

5

Notice: There is a normal but significant condition on the system.

6

Informational: The syslog contains an informational message.

7

Debug: The message is intended for debug-level purposes.

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42.2 Syslog Setup
Click Management > Syslog in the navigation panel to display this screen. The
syslog feature sends logs to an external syslog server. Use this screen to configure
the device’s system logging settings.

Figure 218 Management > Syslog

The following table describes the labels in this screen.

Table 136 Management > Syslog

360

LABEL

DESCRIPTION

Syslog

Select Active to turn on syslog (system logging) and then configure
the syslog setting

Logging Type

This column displays the names of the categories of logs that the
device can generate.

Active

Select this option to set the device to generate logs for the
corresponding category.

Facility

The log facility allows you to send logs to different files in the syslog
server. Refer to the documentation of your syslog program for more
details.

Apply

Click Apply to save your changes to the Switch’s run-time memory.
The Switch loses these changes if it is turned off or loses power, so
use the Save link on the top navigation panel to save your changes to
the non-volatile memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

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42.3 Syslog Server Setup
Click Management > Syslog > Syslog Server Setup to open the following
screen. Use this screen to configure a list of external syslog servers.

Figure 219 Management > Syslog > Server Setup

The following table describes the labels in this screen.

Table 137 Management > Syslog > Server Setup
LABEL

DESCRIPTION

Active

Select this check box to have the device send logs to this syslog server.
Clear the check box if you want to create a syslog server entry but not
have the device send logs to it (you can edit the entry later).

Server Address

Enter the IP address of the syslog server.

Log Level

Select the severity level(s) of the logs that you want the device to send
to this syslog server. The lower the number, the more critical the logs
are.

Add

Click Add to save your changes to the Switch’s run-time memory. The
Switch loses these changes if it is turned off or loses power, so use the
Save link on the top navigation panel to save your changes to the nonvolatile memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

Clear

Click Clear to return the fields to the factory defaults.

Index

This is the index number of a syslog server entry. Click this number to
edit the entry.

Active

This field displays Yes if the device is to send logs to the syslog server.
No displays if the device is not to send logs to the syslog server.

IP Address

This field displays the IP address of the syslog server.

Log Level

This field displays the severity level of the logs that the device is to send
to this syslog server.

Delete

Select an entry’s Delete check box and click Delete to remove the
entry.

Cancel

Click Cancel to begin configuring this screen afresh.

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43

Cluster Management
This chapter introduces cluster management.

43.1 Clustering Management Status Overview
Cluster Management allows you to manage switches through one Switch, called
the cluster manager. The switches must be directly connected and be in the same
VLAN group so as to be able to communicate with one another.

Table 138 ZyXEL Clustering Management Specifications
Maximum number of cluster
members

24

Cluster Member Models

Cluster member models must be compatible with
ZyXEL cluster management implementation.

Cluster Manager

The cluster manager is the Switch through which you
manage the cluster member switches.

Cluster Members

Cluster members are the switches being managed by
the cluster manager switch.

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In the following example, switch A in the basement is the cluster manager and the
other switches on the upper floors of the building are cluster members.

Figure 220 Clustering Application Example

43.2 Cluster Management Status
Click Management > Cluster Management in the navigation panel to display
the following screen.

Note: A cluster can only have one manager.
Figure 221 Management > Cluster Management

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The following table describes the labels in this screen.

Table 139 Management > Cluster Management
LABEL

DESCRIPTION

Status

This field displays the role of this Switch within the cluster.
Manager
Member (you see this if you access this screen in the cluster member
switch directly and not via the cluster manager)
None (neither a manager nor a member of a cluster)

Manager

This field displays the cluster manager switch’s hardware MAC address.

The Number
of Member

This field displays the number of switches that make up this cluster. The
following fields describe the cluster member switches.

Index

You can manage cluster member switches via the cluster manager switch.
Each number in the Index column is a hyperlink leading to the cluster
member switch’s web configurator (see Figure 222 on page 366).

MacAddr

This is the cluster member switch’s hardware MAC address.

Name

This is the cluster member switch’s System Name.

Model

This field displays the model name.

Status

This field displays:
Online (the cluster member switch is accessible)
Error (for example, the cluster member switch password was changed or
the switch was set as the manager and so left the member list, etc.)
Offline (the switch is disconnected - Offline shows approximately 1.5
minutes after the link between cluster member and manager goes down)

43.2.1 Cluster Member Switch Management
Go to the Clustering Management Status screen of the cluster manager switch
and then select an Index hyperlink from the list of members to go to that cluster
member switch's web configurator home page. This cluster member web

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configurator home page and the home page that you'd see if you accessed it
directly are different.

Figure 222 Cluster Management: Cluster Member Web Configurator Screen

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43.2.1.1 Uploading Firmware to a Cluster Member Switch
You can use FTP to upload firmware to a cluster member switch through the
cluster manager switch as shown in the following example.

Figure 223 Example: Uploading Firmware to a Cluster Member Switch
C:\>ftp 192.168.1.1
Connected to 192.168.1.1.
220 Switch FTP version 1.0 ready at Thu Jan 1 00:58:46 1970
User (192.168.0.1:(none)): admin
331 Enter PASS command
Password:
230 Logged in
ftp> ls
200 Port command okay
150 Opening data connection for LIST
--w--w--w1 owner
group
3042210 Jul 01 12:00 ras
-rw-rw-rw1 owner
group
393216 Jul 01 12:00 config
--w--w--w1 owner
group
0 Jul 01 12:00 fw-00-a0-c5-01-23-46
-rw-rw-rw1 owner
group
0 Jul 01 12:00 config-00-a0-c5-01-23-46
226 File sent OK
ftp: 297 bytes received in 0.00Seconds 297000.00Kbytes/sec.
ftp> bin
200 Type I OK
ftp> put 370lt0.bin fw-00-a0-c5-01-23-46
200 Port command okay
150 Opening data connection for STOR fw-00-a0-c5-01-23-46
226 File received OK
ftp: 262144 bytes sent in 0.63Seconds 415.44Kbytes/sec.
ftp>

The following table explains some of the FTP parameters.

Table 140 FTP Upload to Cluster Member Example
FTP PARAMETER

DESCRIPTION

User

Enter “admin”.

Password

The web configurator password default is 1234.

ls

Enter this command to list the name of cluster member
switch’s firmware and configuration file.

370lt0.bin

This is the name of the firmware file you want to upload to
the cluster member switch.

fw-00-a0-c5-01-23-46

This is the cluster member switch’s firmware name as seen
in the cluster manager switch.

config-00-a0-c5-01-23-46 This is the cluster member switch’s configuration file name
as seen in the cluster manager switch.

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43.3 Clustering Management Configuration
Use this screen to configure clustering management. Click Configuration from
the Cluster Management screen to display the next screen.

Figure 224 Management > Clustering Management > Configuration

The following table describes the labels in this screen.

Table 141 Management > Clustering Management > Configuration
LABEL

DESCRIPTION

Clustering
Manager

368

Active

Select Active to have this Switch become the cluster manager switch.
A cluster can only have one manager. Other (directly connected)
switches that are set to be cluster managers will not be visible in the
Clustering Candidates list. If a switch that was previously a cluster
member is later set to become a cluster manager, then its Status is
displayed as Error in the Cluster Management Status screen and a
warning icon (
) appears in the member summary list below.

Name

Type a name to identify the Clustering Manager. You may use up to
32 printable characters (spaces are allowed).

VID

This is the VLAN ID and is only applicable if the Switch is set to
802.1Q VLAN. All switches must be directly connected and in the
same VLAN group to belong to the same cluster. Switches that are not
in the same VLAN group are not visible in the Clustering Candidates
list. This field is ignored if the Clustering Manager is using Portbased VLAN.

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Table 141 Management > Clustering Management > Configuration (continued)
LABEL

DESCRIPTION

Apply

Click Apply to save your changes to the Switch’s run-time memory.
The Switch loses these changes if it is turned off or loses power, so
use the Save link on the top navigation panel to save your changes to
the non-volatile memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

Clustering
Candidate

The following fields relate to the switches that are potential cluster
members.

List

A list of suitable candidates found by auto-discovery is shown here.
The switches must be directly connected. Directly connected switches
that are set to be cluster managers will not be visible in the
Clustering Candidate list. Switches that are not in the same
management VLAN group will not be visible in the Clustering
Candidate list.

Password

Each cluster member’s password is its web configurator password.
Select a member in the Clustering Candidate list and then enter its
web configurator password. If that switch administrator changes the
web configurator password afterwards, then it cannot be managed
from the Cluster Manager. Its Status is displayed as Error in the
Cluster Management Status screen and a warning icon ( )
appears in the member summary list below.
If multiple devices have the same password then hold [SHIFT] and
click those switches to select them. Then enter their common web
configurator password.

Add

Click Add to save your changes to the Switch’s run-time memory. The
Switch loses these changes if it is turned off or loses power, so use the
Save link on the top navigation panel to save your changes to the
non-volatile memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

Refresh

Click Refresh to perform auto-discovery again to list potential cluster
members.

The next summary table shows the information for the clustering members configured.
Index

This is the index number of a cluster member switch.

MacAddr

This is the cluster member switch’s hardware MAC address.

Name

This is the cluster member switch’s System Name.

Model

This is the cluster member switch’s model name.

Remove

Select this checkbox and then click the Remove button to remove a
cluster member switch from the cluster.

Cancel

Click Cancel to begin configuring this screen afresh.

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CHAPTER

44
MAC Table

This chapter introduces the MAC Table screen.

44.1 MAC Table Overview
The MAC Table screen (a MAC table is also known as a filtering database) shows
how frames are forwarded or filtered across the Switch’s ports. When a device
(which may belong to a VLAN group) sends a packet which is forwarded to a port
on the Switch, the MAC address of the device is shown on the Switch’s MAC
Table. It also shows whether the MAC address is dynamic (learned by the Switch)
or static (manually entered in the Static MAC Forwarding screen).
The Switch uses the MAC Table to determine how to forward frames. See the
following figure.
1

The Switch examines a received frame and learns the port from which this source
MAC address came.

2

The Switch checks to see if the frame's destination MAC address matches a source
MAC address already learned in the MAC Table.
• If the Switch has already learned the port for this MAC address, then it forwards
the frame to that port.
• If the Switch has not already learned the port for this MAC address, then the
frame is flooded to all ports. Too much port flooding leads to network
congestion.

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• If the Switch has already learned the port for this MAC address, but the
destination port is the same as the port it came in on, then it filters the frame.

Figure 225 MAC Table Flowchart

44.2 Viewing the MAC Table
Click Management > MAC Table in the navigation panel to display the following
screen. Use this screen to search specific MAC addresses. You can also directly
add dynamic MAC address(es) into the static MAC forwarding table or MAC
filtering table from the MAC table using this screen.

Figure 226 Management > MAC Table

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The following table describes the labels in this screen.

Table 142 Management > MAC Table
LABEL

DESCRIPTION

Condition

Select All to display all MAC addresses in the MAC table.
Select Static to only display static MAC address(es) in this screen.
Select MAC and enter a valid MAC address (six hexadecimal character
pairs) to display the MAC address information in this screen.
Select VID and type a VLAN identification number to display all MAC
addresses in the VLAN.
Select Port and type the number of a port to display all MAC addresses
learned from the port.

Sort by

Select this to display and arrange the data according to MAC address
(MAC), VLAN group (VID) or port number (Port). The information is then
displayed in the summary table below.

Transfer Type

Select Dynamic to MAC forwarding and click Transfer to add the
relative dynamic MAC address(es) you select the criteria here into the
static MAC forwarding table (see Section 10.2 on page 115). The type of
the MAC address(es) will be changed to “static”.
Select Dynamic to MAC filtering and click Transfer to add the relative
dynamic MAC address(es) you make the search here into the static MAC
filtering table (see Section 12.1 on page 123). The MAC address(es) will
be removed from the MAC table and all traffic sent from the MAC
address(es) will be blocked by the Switch.

Search

Click this to search data in the MAC table according to your input criteria.

Transfer

Click this to perform the MAC address transferring you selected in the
Transfer Type field.

Cancel

Click this to begin configuring the search criteria afresh.

Index

This is the incoming frame index number.

MAC Address

This is the MAC address of the device from which this incoming frame
came.

VID

This is the VLAN group to which this frame belongs.

Port

This is the port from which the above MAC address was learned.

Type

This shows whether the MAC address is dynamic (learned by the Switch)
or static (manually entered in the Static MAC Forwarding screen).

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45
IP Table

This chapter introduces the IP table.

45.1 IP Table Overview
The IP Table screen shows how packets are forwarded or filtered across the
Switch’s ports. When a device (which may belong to a VLAN group) sends a packet
which is forwarded to a port on the Switch, the IP address of the device is shown
on the Switch’s IP Table. The IP Table also shows whether the IP address is
dynamic (learned by the Switch) or static (belonging to the Switch).
The Switch uses the IP Table to determine how to forward packets. See the
following figure.
1

The Switch examines a received packet and learns the port from which this source
IP address came.

2

The Switch checks to see if the packet's destination IP address matches a source
IP address already learned in the IP Table.
• If the Switch has already learned the port for this IP address, then it forwards
the packet to that port.
• If the Switch has not already learned the port for this IP address, then the
packet is flooded to all ports. Too much port flooding leads to network
congestion.

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• If the Switch has already learned the port for this IP address, but the
destination port is the same as the port it came in on, then it filters the
packet.

Figure 227 IP Table Flowchart

45.2 Viewing the IP Table
Click Management > IP Table in the navigation panel to display the following
screen.

Figure 228 Management > IP Table

The following table describes the labels in this screen.

Table 143 Management > IP Table

376

LABEL

DESCRIPTION

Sort by

Click one of the following buttons to display and arrange the data according
to that button type. The information is then displayed in the summary table
below.

IP

Click this button to display and arrange the data according to IP address.

VID

Click this button to display and arrange the data according to VLAN group.

Port

Click this button to display and arrange the data according to port number.

Index

This field displays the index number.

IP Address

This is the IP address of the device from which the incoming packets came.

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Table 143 Management > IP Table (continued)
LABEL

DESCRIPTION

VID

This is the VLAN group to which the packet belongs.

Port

This is the port from which the above IP address was learned. This field
displays CPU to indicate the IP address belongs to the Switch.

Type

This shows whether the IP address is dynamic (learned by the Switch) or
static (belonging to the Switch).

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46
ARP Table

This chapter introduces ARP Table.

46.1 ARP Table Overview
Address Resolution Protocol (ARP) is a protocol for mapping an Internet Protocol
address (IP address) to a physical machine address, also known as a Media Access
Control or MAC address, on the local area network.
An IP (version 4) address is 32 bits long. In an Ethernet LAN, MAC addresses are
48 bits long. The ARP Table maintains an association between each MAC address
and its corresponding IP address.

46.1.1 How ARP Works
When an incoming packet destined for a host device on a local area network
arrives at the Switch, the Switch's ARP program looks in the ARP Table and if it
finds the address, it sends it to the device.
If no entry is found for the IP address, ARP broadcasts the request to all the
devices on the LAN. The Switch fills in its own MAC and IP address in the sender
address fields, and puts the known IP address of the target in the target IP
address field. In addition, the Switch puts all ones in the target MAC field
(FF.FF.FF.FF.FF.FF is the Ethernet broadcast address). The replying device (which is
either the IP address of the device being sought or the router that knows the way)
replaces the broadcast address with the target's MAC address, swaps the sender
and target pairs, and unicasts the answer directly back to the requesting machine.
ARP updates the ARP Table for future reference and then sends the packet to the
MAC address that replied.

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46.2 Viewing the ARP Table
Click Management > ARP Table in the navigation panel to open the following
screen. Use the ARP table to view IP-to-MAC address mapping(s).

Figure 229 Management > ARP Table

The following table describes the labels in this screen.

Table 144 Management > ARP Table

380

LABEL

DESCRIPTION

Index

This is the ARP Table entry number.

IP Address

This is the learned IP address of a device connected to a Switch port with
the corresponding MAC address below.

MAC
Address

This is the MAC address of the device with the corresponding IP address
above.

Type

This shows whether the MAC address is dynamic (learned by the Switch) or
static (manually entered in the Static MAC Forwarding screen).

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47

Routing Table
This chapter introduces the routing table.

47.1 Overview
The routing table contains the route information to the network(s) that the Switch
can reach. The Switch automatically updates the routing table with the RIP
information received from other Ethernet devices.

47.2 Viewing the Routing Table Status
Use this screen to view routing table information. Click Management > Routing
Table in the navigation panel to display the screen as shown.

Figure 230 Management > Routing Table

The following table describes the labels in this screen.

Table 145 Management > Routing Table
LABEL

DESCRIPTION

Index

This field displays the index number.

Destination

This field displays the destination IP routing domain.

Gateway

This field displays the IP address of the gateway device.

Interface

This field displays the IP address of the Interface.

Metric

This field displays the cost of the route.

Type

This field displays the method used to learn the route; OSPF - added as an
OSPF interface, RIP - learned from incoming RIP packets or STATIC added as a static entry.

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48

Configure Clone
This chapter shows you how you can copy the settings of one port onto other
ports.

48.1 Configure Clone
Cloning allows you to copy the basic and advanced settings from a source port to
a destination port or ports. Click Management > Configure Clone to open the
following screen.

Figure 231 Management > Configure Clone

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The following table describes the labels in this screen.

Table 146 Management > Configure Clone
LABEL

DESCRIPTION

Source/
Destination

Enter the source port under the Source label. This port’s attributes are
copied.

Port

Enter the destination port or ports under the Destination label. These are
the ports which are going to have the same attributes as the source port.
You can enter individual ports separated by a comma or a range of ports by
using a dash.
Example:
•
•

384

2, 4, 6 indicates that ports 2, 4 and 6 are the destination ports.
2-6 indicates that ports 2 through 6 are the destination ports.

Basic
Setting

Select which port settings (configured in the Basic Setting menus) should
be copied to the destination port(s).

Advanced
Application

Select which port settings (configured in the Advanced Application
menus) should be copied to the destination ports.

Apply

Click Apply to save your changes to the Switch’s run-time memory. The
Switch loses these changes if it is turned off or loses power, so use the
Save link on the top navigation panel to save your changes to the nonvolatile memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

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Troubleshooting &
Product
Specifications
Troubleshooting (387)
Product Specifications (393)

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CHAPTER

49

Troubleshooting
This chapter offers some suggestions to solve problems you might encounter. The
potential problems are divided into the following categories.
• Power, Hardware Connections, and LEDs
• Switch Access and Login
• Switch Configuration

49.1 Power, Hardware Connections, and LEDs
The Switch does not turn on. None of the LEDs turn on.

1

Make sure the Switch is turned on (in DC models or if the DC power supply is
connected in AC/DC models).

2

Make sure you are using the power adaptor or cord included with the Switch.

3

Make sure the power adaptor or cord is connected to the Switch and plugged in to
an appropriate power source. Make sure the power source is turned on.

4

Turn the Switch off and on (in DC models or if the DC power supply is connected in
AC/DC models).

5

Disconnect and re-connect the power adaptor or cord to the Switch (in AC models
or if the AC power supply is connected in AC/DC models).

6

If the problem continues, contact the vendor.

The ALM LED is on.

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1

Turn the Switch off and on (in DC models or if the DC power supply is connected in
AC/DC models).

2

Disconnect and re-connect the power adaptor or cord to the Switch (in AC models
or if the AC power supply is connected in AC/DC models).

3

If the problem continues, contact the vendor.

One of the LEDs does not behave as expected.

1

Make sure you understand the normal behavior of the LED. See Section 3.3 on
page 41.

2

Check the hardware connections. See Section 3.1 on page 35.

3

Inspect your cables for damage. Contact the vendor to replace any damaged
cables.

4

Turn the Switch off and on (in DC models or if the DC power supply is connected in
AC/DC models).

5

Disconnect and re-connect the power adaptor or cord to the Switch (in AC models
or if the AC power supply is connected in AC/DC models).

6

If the problem continues, contact the vendor.

49.2 Switch Access and Login
I forgot the IP address for the Switch.

388

1

The default in-band IP address is 192.168.1.1.

2

Use the console port to log in to the Switch.

3

Use the MGMT port to log in to the Switch, the default IP address of the MGMT
port is 192.168.0.1.

4

If this does not work, you have to reset the device to its factory defaults. See
Section 4.6 on page 52.

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I forgot the username and/or password.

1

The default username is admin and the default password is 1234.

2

If this does not work, you have to reset the device to its factory defaults. See
Section 4.6 on page 52.

I cannot see or access the Login screen in the web configurator.

1

Make sure you are using the correct IP address.
• The default in-band IP address is 192.168.1.1.
• If you changed the IP address, use the new IP address.
• If you changed the IP address and have forgotten it, see the troubleshooting
suggestions for I forgot the IP address for the Switch.

2

Check the hardware connections, and make sure the LEDs are behaving as
expected. See Section 3.3 on page 41.

3

Make sure your Internet browser does not block pop-up windows and has
JavaScripts and Java enabled.

4

Make sure your computer is in the same subnet as the Switch. (If you know that
there are routers between your computer and the Switch, skip this step.)

5

Reset the device to its factory defaults, and try to access the Switch with the
default IP address. See Section 4.6 on page 52.

6

If the problem continues, contact the vendor, or try one of the advanced
suggestions.
Advanced Suggestions
• Try to access the Switch using another service, such as Telnet. If you can access
the Switch, check the remote management settings to find out why the Switch
does not respond to HTTP.

I can see the Login screen, but I cannot log in to the Switch.

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1

Make sure you have entered the user name and password correctly. The default
user name is admin, and the default password is 1234. These fields are casesensitive, so make sure [Caps Lock] is not on.

2

You may have exceeded the maximum number of concurrent Telnet sessions.
Close other Telnet session(s) or try connecting again later.
Check that you have enabled logins for HTTP or Telnet. If you have configured a
secured client IP address, your computer’s IP address must match it. Refer to the
chapter on access control for details.

3

Disconnect and re-connect the cord to the Switch.

4

If this does not work, you have to reset the device to its factory defaults. See
Section 4.6 on page 52.

Pop-up Windows, JavaScripts and Java Permissions

In order to use the web configurator you need to allow:
• Web browser pop-up windows from your device.
• JavaScripts (enabled by default).
• Java permissions (enabled by default).

I cannot see some of Advanced Application submenus at the bottom of the
navigation panel.

The recommended screen resolution is 1024 by 768 pixels. Adjust the value in
your computer and then you should see the rest of Advanced Application
submenus at the bottom of the navigation panel.

There is unauthorized access to my Switch via telnet, HTTP and SSH.

Click the Display button in the System Log field in the Management >
Diagnostic screen to check for unauthorized access to your Switch. To avoid
unauthorized access, configure the secured client setting in the Management >
Access Control > Remote Management screen for telnet, HTTP and SSH (see
Section 40.10 on page 355). Computers not belonging to the secured client set
cannot get permission to access the Switch.

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49.3 Switch Configuration
I lost my configuration settings after I restart the Switch.

Make sure you save your configuration into the
Switch’s nonvolatile memory each time you make
changes. Click Save at the top right corner of the
web configurator to save the configuration permanently. See also Section 39.3 on
page 330 for more information about how to save your configuration.

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50

Product Specifications
The following tables summarize the Switch’s hardware and firmware features.

Table 147 Hardware Specifications
SPECIFICATION

DESCRIPTION

Dimensions

Standard 19” rack mountable
438 mm (W) x 310 mm (D) x 44.45 mm (H)

Weight

4.9 Kg

Power Specification

AC: 100 - 240 VAC 50/60 Hz 0.8 A max, 85 W internal universal
power supply
DC: -36 VDC ~ -72 VDC 2.3 A max, 80 W consumption. There is
no tolerance for the DC input voltage.
One Backup Power Supply (BPS) connector

Interfaces

24 Gigabit Ethernet (GbE) Dual Personality interfaces. Each
interface has:
•
•

a 1000Base-T port, compatible with Cat5/5e/6 copper cable.
a mini-GBIC slot, compatible with Small Form-Factor Pluggable
(SFP) Multi Source Agreement (MSA) transceivers, to be used
with 1000Base-X fiber cables.
For each Dual Personality interface one port or slot is active at
a time.

Two stacking ports
One optional uplink module set.
One local management Ethernet 10/100Base-T port
One RS-232 console port
Ethernet Ports

Auto-negotiating: 10 Mbps or 100 Mbps in either half-duplex or
full-duplex mode. 1000 Mbps and 10 Gbps in full duplex.
Auto-crossover: Use either crossover or straight-through Ethernet
cables.
Auto-MDIX
Compliant with IEEE 802.3ad/u/x
Back pressure flow control for half duplex
Flow control for full duplex (IEEE 802.3x)

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Table 147 Hardware Specifications
LEDs

Main switch: BPS, PWR, SYS, ALM,
Per Stacking port: S1, S2
Per mini-GBIC port: green LED
Per 1000Base-T port:
Green: 10/1000 Mbps
Amber: 100 Mbps
mini-GBIC/1000Base-T LEDs:
steady: link state
blinking: transmitting/receiving

Operating
Environment

Temperature: 0º C ~ 45º C (32º F ~ 113º F)

Storage Environment

Temperature: -10º C ~ 70º C (-13º F ~ 158º F)

Humidity: 10 ~ 90% (non-condensing)

Humidity: 10 ~ 90% (non-condensing)
Ground Wire Gauge

18 AWG or larger

Power Wire Gauge

18 AWG or larger

Fuse Specification

250 VAC, T4A. For DC version switchboard.

Approvals

Safety
UL 60950-1, CSA 60950-1, EN 60950-1, IEC 60950-1
EMC
FCC Part 15 (Class A), CE EMC (Class A)

Table 148 Firmware Specifications
FEATURE

DESCRIPTION

Default IP Address

In band: 192.168.1.1
Out of band (Management port): 192.168.0.1

394

Default Subnet Mask

255.255.255.0 (24 bits)

Administrator User
Name

admin

Default Password

1234

Number of Login
Accounts Configurable
on the Switch

4 management accounts configured on the Switch.

IP Routing Domain

An IP interface (also known as an IP routing domain) is not
bound to a physical port. Configure an IP routing domain to
allow the Switch to route traffic between different networks.

Authentication via RADIUS and TACACS+ also available.

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Table 148 Firmware Specifications
FEATURE

DESCRIPTION

VLAN

A VLAN (Virtual Local Area Network) allows a physical network
to be partitioned into multiple logical networks. Devices on a
logical network belong to one group. A device can belong to
more than one group. With VLAN, a device cannot directly talk
to or hear from devices that are not in the same group(s); the
traffic must first go through a router.

VLAN Stacking

Use VLAN stacking to add an outer VLAN tag to the inner IEEE
802.1Q tagged frames that enter the network. By tagging the
tagged frames (“double-tagged” frames), the service provider
can manage up to 4,094 VLAN groups with each group
containing up to 4,094 customer VLANs. This allows a service
provider to provide different service, based on specific VLANs,
for many different customers.

MAC Address Filter

Filter traffic based on the source and/or destination MAC
address and VLAN group (ID).

DHCP (Dynamic Host
Configuration Protocol)

Use this feature to have the Switch assign IP addresses, an IP
default gateway and DNS servers to computers on your
network.

IGMP Snooping

The Switch supports IGMP snooping enabling group multicast
traffic to be only forwarded to ports that are members of that
group; thus allowing you to significantly reduce multicast traffic
passing through your Switch.

Differentiated Services
(DiffServ)

With DiffServ, the Switch marks packets so that they receive
specific per-hop treatment at DiffServ-compliant network
devices along the route based on the application types and
traffic flow.

Classifier and Policy

You can create a policy to define actions to be performed on a
traffic flow grouped by a classifier according to specific criteria
such as the IP address, port number or protocol type, etc.

Queuing

Queuing is used to help solve performance degradation when
there is network congestion. Three scheduling services are
supported: Strict Priority Queuing (SPQ), Weighted Round
Robin (WRR) and Weighted Fair Queuing (WFQ). This allows the
Switch to maintain separate queues for packets from each
individual source or flow and prevent a source from
monopolizing the bandwidth.

Port Mirroring

Port mirroring allows you to copy traffic going from one or all
ports to another or all ports in order that you can examine the
traffic from the mirror port (the port you copy the traffic to)
without interference.

Static Route

Static routes tell the Switch how to forward IP traffic when you
configure the TCP/IP parameters manually.

Multicast VLAN
Registration (MVR)

Multicast VLAN Registration (MVR) is designed for applications
(such as Media-on-Demand (MoD)) using multicast traffic
across a network. MVR allows one single multicast VLAN to be
shared among different subscriber VLANs on the network.
This improves bandwidth utilization by reducing multicast
traffic in the subscriber VLANs and simplifies multicast group
management.

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Table 148 Firmware Specifications

396

FEATURE

DESCRIPTION

IP Multicast

With IP multicast, the Switch delivers IP packets to a group of
hosts on the network - not everybody. In addition, the Switch
can send packets to Ethernet devices that are not VLAN-aware
by untagging (removing the VLAN tags) IP multicast packets.

RIP

RIP (Routing Information Protocol) allows a routing device to
exchange routing information with other routers.

OSPF

OSPF (Open Shortest Path First) is a link-state protocol
designed to distribute routing information within an
autonomous system (AS). An autonomous system is a
collection of networks using a common routing protocol to
exchange routing information. OSPF is best suited for large
networks.

DVMRP

DVMRP (Distance Vector Multicast Routing Protocol) is a
protocol used for routing multicast data within an autonomous
system (AS). DVMRP provides multicast forwarding capability
to a layer 3 switch that runs both the IPv4 protocol (with IP
Multicast support) and the IGMP protocol.

VRRP

Virtual Router Redundancy Protocol (VRRP), defined in RFC
2338, allows you to create redundant backup gateways to
ensure that the default gateway of a host is always available.

STP (Spanning Tree
Protocol) / RSTP (Rapid
STP)

(R)STP detects and breaks network loops and provides backup
links between switches, bridges or routers. It allows a Switch to
interact with other (R)STP -compliant switches in your network
to ensure that only one path exists between any two stations
on the network.

Loop Guard

Use the loop guard feature to protect against network loops on
the edge of your network.

IP Source Guard

Use IP source guard to filter unauthorized DHCP and ARP
packets in your network.

Link Aggregation

Link aggregation (trunking) is the grouping of physical ports
into one logical higher-capacity link. You may want to trunk
ports if for example, it is cheaper to use multiple lower-speed
links than to under-utilize a high-speed, but more costly,
single-port link.

Port Authentication and
Security

For security, the Switch allows authentication using IEEE
802.1x with an external RADIUS server and port security that
allows only packets with dynamically learned MAC addresses
and/or configured static MAC addresses to pass through a port
on the Switch.

Authentication and
Accounting

The Switch supports authentication and accounting services via
RADIUS and TACACS+ AAA servers.

Device Management

Use the web configurator or commands to easily configure the
rich range of features on the Switch.

Port Cloning

Use the port cloning feature to copy the settings you configure
on one port to another port or ports.

Syslog

The Switch can generate syslog messages and send it to a
syslog server.

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Table 148 Firmware Specifications
FEATURE

DESCRIPTION

Firmware Upgrade

Download new firmware (when available) from the ZyXEL web
site and use the web configurator, CLI or an FTP/TFTP tool to
put it on the Switch.

Note: Only upload firmware for your specific model!
Configuration Backup &
Restoration

Make a copy of the Switch’s configuration and put it back on
the Switch later if you decide you want to revert back to an
earlier configuration.

Cluster Management

Cluster management (also known as iStacking) allows you to
manage switches through one switch, called the cluster
manager. The switches must be directly connected and be in
the same VLAN group so as to be able to communicate with
one another.

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Table 149 Switching Specifications
Layer 2
Features

Bridging

16K MAC addresses
Static MAC address filtering by source/destination
Broadcast storm control
Static MAC address forwarding

Switching

Switching fabric: 144 Gbps, non-blocking
Max. Frame size: 9 kbytes
Forwarding frame: IEEE 802.3, IEEE 802.1q, Ethernet II, PPPoE
Prevent the forwarding of corrupted packets

STP

IEEE 802.1w Rapid Spanning Tree Protocol (RSTP)
Multiple Rapid Spanning Tree capability (4 configurable trees)
IEEE 802.1s Multiple Spanning Tree Protocol

QoS

IEEE 802.1p
Eight priority queues per port
Port-based egress traffic shaping
Rule-based traffic mirroring
Supports IGMP snooping

VLAN

Port-based VLAN setting
Tag-based (IEEE 802.1Q) VLAN
Number of VLAN: 4K, 1K static maximum
Supports GVRP
Double tagging for VLAN stacking
Protocol Based VLAN
Subnet Based VLAN

398

Port
Aggregation

Supports IEEE 802.3ad; static and dynamic (LACP) port trunking

Port
mirroring

All ports support port mirroring

Bandwidth
control

Supports rate limiting at 64K increment

Six groups (up to 8 ports each)

Support port mirroring per IP/TCP/UDP

XGS-4728F User’s Guide

Chapter 50 Product Specifications

Table 149 Switching Specifications (continued)
Layer 3
Features

IP Capability

IPV4 support
64 IP routing domains
8K IP address table
12K routing paths
Wire speed IP forwarding

Routing
protocols

Unicast: RIP-V1/V2, OSPF V2
Multicast: DVMRP, IGMP V1/V2/V3
Static Routing
64 VRRP entries

IP services

DHCP relay; VLAN based DHCP server/relay
DHCP Snooping

Filtering

Support L2 MAC filtering, L3 IP filtering, Layer 4 TCP/UDP socket

Multicast

IGMP snooping (IGMP v1/v2/v3, 16 VLAN maximum-user configurable)
IGMP filtering
5 MVR entries
IGMP timer
Multicast reserve group
Static multicast
IGMP snooping fast-leave
IGMP snooping statistics
IGMP throttling

AAA

Support RADIUS and TACACS+

Security

IEEE 802.1x port-based authentication
Static MAC address filtering
Static MAC address forwarding
MAC Freeze
Limiting number of dynamic addresses per port

The following list, which is not exhaustive, illustrates the standards supported in
the Switch.

Table 150 Standards Supported
STANDARD

DESCRIPTION

RFC 826

Address Resolution Protocol (ARP)

RFC 867

Daytime Protocol

RFC 868

Time Protocol

RFC 894

Ethernet II Encapsulation

XGS-4728F User’s Guide

399

Chapter 50 Product Specifications

Table 150 Standards Supported (continued)

400

STANDARD

DESCRIPTION

RFC 1058

RIP-1 (Routing Information Protocol)

RFC 1112

IGMP v1

RFC 1155

SMI

RFC 1157

SNMPv1: Simple Network Management Protocol version 1

RFC 1213

SNMP MIB II

RFC 1305

Network Time Protocol (NTP version 3)

RFC 1441

SNMPv2 Simple Network Management Protocol version 2

RFC 1493

Bridge MIBs

RFC 1643

Ethernet MIBs

RFC 1723

RIP-2 (Routing Information Protocol)

RFC 1757

RMON

RFC 1901

SNMPv2c Simple Network Management Protocol version 2c

RFC 2131, RFC 2132

Dynamic Host Configuration Protocol (DHCP)

RFC 2138

RADIUS (Remote Authentication Dial In User Service)

RFC 2139

RADIUS Accounting

RFC 2236

Internet Group Management Protocol, Version 2.

RFC 2338

Virtual Router Redundancy Protocol (VRRP)

RFC 2698

Two Rate Three Color Marker (TRTCM)

RFC 2865

RADIUS - Vendor Specific Attribute

RFC 2674

P-BRIDGE-MIB, Q-BRIDGE-MIB

RFC 3046

DHCP Relay

RFC 3164

Syslog

RFC 3376

Internet Group Management Protocol, Version 3

RFC 3414

User-based Security Model (USM) for version 3 of the Simple
Network Management Protocol (SNMP v3)

RFC 3580

RADIUS - Tunnel Protocol Attribute

IEEE 802.1ab

Link Layer Discovery Protocol (LLDP)

IEEE 802.1ag

Connectivity Fault Management (CFM)

IEEE 802.1x

Port Based Network Access Control

IEEE 802.1D

MAC Bridges

IEEE 802.1p

Traffic Types - Packet Priority

IEEE 802.1Q

Tagged VLAN

IEEE 802.1w

Rapid Spanning Tree Protocol (RSTP)

IEEE 802.1s

Multiple Spanning Tree Protocol (MSTP)

IEEE 802.3

Packet Format

IEEE 802.3ad

Link Aggregation

IEEE 802.3ah

Ethernet OAM (Operations, Administration and Maintenance)

XGS-4728F User’s Guide

Chapter 50 Product Specifications

Table 150 Standards Supported (continued)
STANDARD

DESCRIPTION

IEEE 802.3x

Flow Control

IEEE 802.3z

1000BASE-X
For optical fiber link 1000BASE-SX/LX.

XGS-4728F User’s Guide

401

Chapter 50 Product Specifications

402

XGS-4728F User’s Guide

P ART VII
Appendices and
Index
Common Services (405)
Legal Information (409)
Index (413)

403

404

APPENDIX

A

Common Services
The following table lists some commonly-used services and their associated
protocols and port numbers. For a comprehensive list of port numbers, ICMP type/
code numbers and services, visit the IANA (Internet Assigned Number Authority)
web site.
• Name: This is a short, descriptive name for the service. You can use this one or
create a different one, if you like.
• Protocol: This is the type of IP protocol used by the service. If this is TCP/
UDP, then the service uses the same port number with TCP and UDP. If this is
User-Defined, the Port(s) is the IP protocol number, not the port number.
• Port(s): This value depends on the Protocol. Please refer to RFC 1700 for
further information about port numbers.
• If the Protocol is TCP, UDP, or TCP/UDP, this is the IP port number.
• If the Protocol is USER, this is the IP protocol number.
• Description: This is a brief explanation of the applications that use this service
or the situations in which this service is used.

Table 151 Commonly Used Services
NAME

PROTOCOL

PORT(S)

DESCRIPTION

AH
(IPSEC_TUNNEL)

User-Defined

51

The IPSEC AH (Authentication Header)
tunneling protocol uses this service.

AIM/New-ICQ

TCP

5190

AOL’s Internet Messenger service. It is
also used as a listening port by ICQ.

AUTH

TCP

113

Authentication protocol used by some
servers.

BGP

TCP

179

Border Gateway Protocol.

BOOTP_CLIENT

UDP

68

DHCP Client.

BOOTP_SERVER

UDP

67

DHCP Server.

CU-SEEME

TCP

7648

UDP

24032

A popular videoconferencing solution
from White Pines Software.

TCP/UDP

53

DNS

XGS-4728F User’s Guide

Domain Name Server, a service that
matches web names (for example
www.zyxel.com) to IP numbers.

405

Appendix A Common Services

Table 151 Commonly Used Services (continued)

406

NAME

PROTOCOL

PORT(S)

DESCRIPTION

ESP
(IPSEC_TUNNEL)

User-Defined

50

The IPSEC ESP (Encapsulation
Security Protocol) tunneling protocol
uses this service.

FINGER

TCP

79

Finger is a UNIX or Internet related
command that can be used to find out
if a user is logged on.

FTP

TCP

20

TCP

21

File Transfer Program, a program to
enable fast transfer of files, including
large files that may not be possible by
e-mail.

H.323

TCP

1720

NetMeeting uses this protocol.

HTTP

TCP

80

Hyper Text Transfer Protocol - a client/
server protocol for the world wide
web.

HTTPS

TCP

443

HTTPS is a secured http session often
used in e-commerce.

ICMP

User-Defined

1

Internet Control Message Protocol is
often used for diagnostic or routing
purposes.

ICQ

UDP

4000

This is a popular Internet chat
program.

IGMP
(MULTICAST)

User-Defined

2

Internet Group Multicast Protocol is
used when sending packets to a
specific group of hosts.

IKE

UDP

500

The Internet Key Exchange algorithm
is used for key distribution and
management.

IRC

TCP/UDP

6667

This is another popular Internet chat
program.

MSN Messenger

TCP

1863

Microsoft Networks’ messenger
service uses this protocol.

NEW-ICQ

TCP

5190

An Internet chat program.

NEWS

TCP

144

A protocol for news groups.

NFS

UDP

2049

Network File System - NFS is a client/
server distributed file service that
provides transparent file sharing for
network environments.

NNTP

TCP

119

Network News Transport Protocol is
the delivery mechanism for the
USENET newsgroup service.

PING

User-Defined

1

Packet INternet Groper is a protocol
that sends out ICMP echo requests to
test whether or not a remote host is
reachable.

XGS-4728F User’s Guide

Appendix A Common Services

Table 151 Commonly Used Services (continued)
NAME

PROTOCOL

PORT(S)

DESCRIPTION

POP3

TCP

110

Post Office Protocol version 3 lets a
client computer get e-mail from a
POP3 server through a temporary
connection (TCP/IP or other).

PPTP

TCP

1723

Point-to-Point Tunneling Protocol
enables secure transfer of data over
public networks. This is the control
channel.

PPTP_TUNNEL
(GRE)

User-Defined

47

PPTP (Point-to-Point Tunneling
Protocol) enables secure transfer of
data over public networks. This is the
data channel.

RCMD

TCP

512

Remote Command Service.

REAL_AUDIO

TCP

7070

A streaming audio service that
enables real time sound over the web.

REXEC

TCP

514

Remote Execution Daemon.

RLOGIN

TCP

513

Remote Login.

RTELNET

TCP

107

Remote Telnet.

RTSP

TCP/UDP

554

The Real Time Streaming (media
control) Protocol (RTSP) is a remote
control for multimedia on the
Internet.

SFTP

TCP

115

Simple File Transfer Protocol.

SMTP

TCP

25

Simple Mail Transfer Protocol is the
message-exchange standard for the
Internet. SMTP enables you to move
messages from one e-mail server to
another.

SNMP

TCP/UDP

161

Simple Network Management
Program.

SNMP-TRAPS

TCP/UDP

162

Traps for use with the SNMP
(RFC:1215).

SQL-NET

TCP

1521

Structured Query Language is an
interface to access data on many
different types of database systems,
including mainframes, midrange
systems, UNIX systems and network
servers.

SSH

TCP/UDP

22

Secure Shell Remote Login Program.

STRM WORKS

UDP

1558

Stream Works Protocol.

SYSLOG

UDP

514

Syslog allows you to send system logs
to a UNIX server.

TACACS

UDP

49

Login Host Protocol used for (Terminal
Access Controller Access Control
System).

XGS-4728F User’s Guide

407

Appendix A Common Services

Table 151 Commonly Used Services (continued)

408

NAME

PROTOCOL

PORT(S)

DESCRIPTION

TELNET

TCP

23

Telnet is the login and terminal
emulation protocol common on the
Internet and in UNIX environments. It
operates over TCP/IP networks. Its
primary function is to allow users to
log into remote host systems.

TFTP

UDP

69

Trivial File Transfer Protocol is an
Internet file transfer protocol similar
to FTP, but uses the UDP (User
Datagram Protocol) rather than TCP
(Transmission Control Protocol).

VDOLIVE

TCP

7000

Another videoconferencing solution.

XGS-4728F User’s Guide

APPENDIX

B

Legal Information
Copyright
Copyright © 2010 by ZyXEL Communications Corporation.
The contents of this publication may not be reproduced in any part or as a whole,
transcribed, stored in a retrieval system, translated into any language, or
transmitted in any form or by any means, electronic, mechanical, magnetic,
optical, chemical, photocopying, manual, or otherwise, without the prior written
permission of ZyXEL Communications Corporation.
Published by ZyXEL Communications Corporation. All rights reserved.

Disclaimer
ZyXEL does not assume any liability arising out of the application or use of any
products, or software described herein. Neither does it convey any license under
its patent rights nor the patent rights of others. ZyXEL further reserves the right
to make changes in any products described herein without notice. This publication
is subject to change without notice.

Trademarks
ZyNOS (ZyXEL Network Operating System) is a registered trademark of ZyXEL
Communications, Inc. Other trademarks mentioned in this publication are used for
identification purposes only and may be properties of their respective owners.

Certifications
Federal Communications Commission (FCC) Interference Statement
This device complies with Part 15 of FCC rules. Operation is subject to the
following two conditions:
• This device may not cause harmful interference.

XGS-4728F User’s Guide

409

Appendix B Legal Information
• This device must accept any interference received, including interference that
may cause undesired operations.

FCC Warning
This device has been tested and found to comply with the limits for a Class A
digital switch, pursuant to Part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against harmful interference in a commercial
environment. This device generates, uses, and can radiate radio frequency energy
and, if not installed and used in accordance with the instruction manual, may
cause harmful interference to radio communications. Operation of this device in a
residential area is likely to cause harmful interference in which case the user will
be required to correct the interference at his own expense.

CE Mark Warning:
This is a class A product. In a domestic environment this product may cause radio
interference in which case the user may be required to take adequate measures.

Taiwanese BSMI (Bureau of Standards, Metrology and Inspection) A
Warning:

Notices
Changes or modifications not expressly approved by the party responsible for
compliance could void the user's authority to operate the equipment.
This Class A digital apparatus complies with Canadian ICES-003.
Cet appareil numérique de la classe A est conforme à la norme NMB-003 du
Canada.
CLASS 1 LASER PRODUCT
APPAREIL A LASER DE CLASS 1
PRODUCT COMPLIES WITH 21 CFR 1040.10 AND 1040.11.
PRODUIT CONFORME SELON 21 CFR 1040.10 ET 1040.11.

410

XGS-4728F User’s Guide

Appendix B Legal Information

Viewing Certifications
1

Go to http://www.zyxel.com.

2

Select your product on the ZyXEL home page to go to that product's page.

3

Select the certification you wish to view from this page.

ZyXEL Limited Warranty
ZyXEL warrants to the original end user (purchaser) that this product is free from
any defects in materials or workmanship for a period of up to two years from the
date of purchase. During the warranty period, and upon proof of purchase, should
the product have indications of failure due to faulty workmanship and/or
materials, ZyXEL will, at its discretion, repair or replace the defective products or
components without charge for either parts or labor, and to whatever extent it
shall deem necessary to restore the product or components to proper operating
condition. Any replacement will consist of a new or re-manufactured functionally
equivalent product of equal or higher value, and will be solely at the discretion of
ZyXEL. This warranty shall not apply if the product has been modified, misused,
tampered with, damaged by an act of God, or subjected to abnormal working
conditions.

Note
Repair or replacement, as provided under this warranty, is the exclusive remedy of
the purchaser. This warranty is in lieu of all other warranties, express or implied,
including any implied warranty of merchantability or fitness for a particular use or
purpose. ZyXEL shall in no event be held liable for indirect or consequential
damages of any kind to the purchaser.
To obtain the services of this warranty, contact ZyXEL's Service Center for your
Return Material Authorization number (RMA). Products must be returned Postage
Prepaid. It is recommended that the unit be insured when shipped. Any returned
products without proof of purchase or those with an out-dated warranty will be
repaired or replaced (at the discretion of ZyXEL) and the customer will be billed
for parts and labor. All repaired or replaced products will be shipped by ZyXEL to
the corresponding return address, Postage Paid. This warranty gives you specific
legal rights, and you may also have other rights that vary from country to country.

Registration
Register your product online to receive e-mail notices of firmware upgrades and
information at www.zyxel.com for global products, or at www.us.zyxel.com for
North American products.

XGS-4728F User’s Guide

411

Appendix B Legal Information

412

XGS-4728F User’s Guide

Index

Index
Numerics
802.1P priority 90

setup 221
authorization
privilege levels 223
setup 221
automatic VLAN registration 96

A
access control
limitations 337
login account 347
remote management 355
service port 354
SNMP 338
accounting
setup 221
address learning, MAC 104, 107
Address Resolution Protocol (ARP) 379, 383, 384
administrator password 348
age 141
aggregator ID 157, 159
aging time 85
applications
bridging 25
IEEE 802.1Q VLAN 27
switched workgroup 26
Area Border Router (ABR) 278
area ID
and OSPF 283

Autonomous System
and OSPF 277
Autonomous System (AS) 277, 295

B
back up, configuration file 333
Backbone Router (BR) 278
backbone, routing 277
Backup Designated Router(BDR), and OSPF 279
bandwidth control 398
basic settings 77
basic setup tutorial 61
BDR (Backup Designated Router) 279
binding 231
binding table 231
building 231
BPDUs (Bridge Protocol Data Units) 126
Bridge Protocol Data Units (BPDUs) 126
bridging 398

ARP
how it works 379
viewing 380

C

ARP (Address Resolution Protocol) 379

CDP 266

ARP inspection 231, 234
and MAC filter 234
configuring 235
syslog messages 235
trusted ports 235

certifications 409
notices 410
viewing 411

AS Boundary Router 278
authentication 284
and OSPF 283
and RADIUS 216

XGS-4728F User’s Guide

CFI (Canonical Format Indicator) 95
changing the password 51
Cisco Discovery Protocol, see CDP
CIST 130

413

Index
CIST (Common and Internal Spanning Tree)
128
Class of Service (CoS) 299
classifier 173, 175
and QoS 173
editing 176
example 178
overview 173
setup 173, 175, 176
viewing 176
cloning a port See port cloning
cluster management 363
and switch passwords 369
cluster manager 363, 368
cluster member 363, 369
cluster member firmware upgrade 367
network example 364
setup 368
specification 363
status 364
switch models 363
VID 368
web configurator 365

D
Database Description (DD) 278
daylight saving time 81
default gateway 314
Designated Router(DR), and OSPF 279
DHCP 307
client IP pool 314
configuration options 307
modes 307
relay agent 307
relay example 315
server 307
setup 313
DHCP (Dynamic Host Configuration Protocol)
307
DHCP relay option 82 233
DHCP snooping 61, 231, 232
configuring 233
DHCP relay option 82 233
trusted ports 232
untrusted ports 232

cluster manager 363

DHCP snooping database 232

cluster member 363

diagnostics 357
Ethernet port test 358
ping 358
system log 357

command interface 28
Common and Internal Spanning Tree (CIST)
128
Common and Internal Spanning Tree, See CIST
130
configuration 274
change running config 331
configuration file 52
backup 333
restore 52, 332
saving 330
configuration, saving 51
console port
settings 41

Differentiated Service (DiffServ) 299
DiffServ 299
activate 302
and TRTCM 304
DS field 299
DSCP 299
DSCP-to-IEEE802.1p mapping 305
network example 300
PHB 299
dimensions 393
disclaimer 409

copying port settings, See port cloning

double-tagged frames 191

copyright 409

DR (Designated Router) 279

CPU management port 110

DS (Differentiated Services) 299

current date 81

DSCP
DSCP-to-IEEE802.1p mapping 305
service level 299
what it does 299

current time 81

DSCP (DiffServ Code Point) 299
DVMRP

414

XGS-4728F User’s Guide

Index
Autonomous System 295
default timer setting 298
error message 297
graft 296
how it works 295
implementation 295
probe 296
prune 296
report 296
setup 296
terminology 296
threshold 297
DVMRP (Distance Vector Multicast Routing
Protocol) 295
dynamic link aggregation 153

IEEE802.3x 90
forwarding
delay 141
frames
tagged 103
untagged 103
front panel 35
FTP 28, 333
file transfer procedure 334
restrictions over WAN 335

G
GARP 96

E

GARP (Generic Attribute Registration Protocol)
96
GARP terminology 96

egress port 113

GARP timer 85, 96

Ethernet broadcast address 379

general features 398

Ethernet port test 358

general setup 80

Ethernet ports 35
default settings 36

getting help 54

example
summary address 286

GVRP 96, 103
and port assignment 103

exchange RIP and OSPF information 285

GVRP (GARP VLAN Registration Protocol) 96

GMT (Greenwich Mean Time) 81

external authentication server 216

H
F
fan speed 79

hardware installation 31
mounting 32

FCC interference statement 409

hardware monitor 78

file transfer using FTP
command example 334

hardware overview 35

filename convention, configuration
configuration
file names 333

hops 141

hello time 141

filtering 123
rules 123

HTTPS 350
certificates 350
implementation 350
public keys, private keys 350

filtering database, MAC table 371

HTTPS example 351

firmware 78
upgrade 331, 367

humidity 394

flow control 90
back pressure 90

XGS-4728F User’s Guide

415

Index
static bindings 231

I
IEEE 802.1p, priority 85
IEEE 802.1x
activate 166, 167, 219
reauthentication 166
IEEE 802.1x, port authentication 163
IGMP 295
how it works 292
overview 291
port based 293
setup 294
version 199
version 3 293
versions supported 292
IGMP (Internet Group Management Protocol)
199, 292
IGMP filtering 199
profile 205
profiles 201
IGMP leave timeout
fast 202
mormal 202

L
L2PT 263
access port 264
CDP 263
configuration 265
encapsulation 263
LACP 263
MAC address 263
mode 264
overview 263
PAgP 263
point to point 263
STP 263
tunnel port 264
UDLD 263
VTP 263

IGMP snooping 200
MVR 207

LACP 153, 266
system priority 160
timeout 160

IGMP throttling 203

layer 2 features 398

ingress port 113

Layer 2 protocol tunneling, see L2PT

Installation
Rack-mounting 32

layer 3 features 399

installation
freestanding 31
precautions 32

limit MAC address learning 171

interface 280
and OSPF 286
interface, and OSPF 278
Internal Router (IR) 278
introduction 25
IP
capability 399
interface 86, 319
routing domain 86
services 399
setup 86
IP multicast example 291
IP source guard 231
ARP inspection 231, 234
DHCP snooping 231, 232

416

IP table 375
how it works 375

LEDs 41
Link Aggregate Control Protocol (LACP) 153
link aggregation 153
dynamic 153
ID information 154
setup 157, 159
status 155
traffic distribution algorithm 156
traffic distribution type 158
link state database 278, 280
lockout 52
log 357
login 45
password 51
login account
Administrator 347
non-administrator 347
login accounts 347

XGS-4728F User’s Guide

Index
configuring via web configurator 347
multiple 347
number of 347
login password 348
loop guard 255
how it works 256
port shut down 257
probe packet 256
loop guard, vs STP 255
LSA (Link State Advertisement) 278

M
MAC (Media Access Control) 78
MAC address 78, 379
maximum number per port 171, 172
MAC address learning 85, 104, 107, 115, 171
specify limit 171
MAC authentication 164
aging time 168

age 141
hops 141
metric 286
MIB
and SNMP 338
supported MIBs 339
MIB (Management Information Base) 338
mini GBIC ports 36
connection speed 36
connector type 36
transceiver installation 37
transceiver removal 37
mirroring ports 151
monitor port 151, 152
mounting brackets 32
MSA (MultiSource Agreement) 36
MST Instance, See MSTI 129
MST region 129
MSTI 129
MST ID 129
MSTI (Multiple Spanning Tree Instance) 128

Management Information Base (MIB) 338

MSTP 125, 128
bridge ID 144
configuration 140
configuration digest 144
forwarding delay 141
Hello Time 144
hello time 141
Max Age 144
max age 141
max hops 141
MST region 129
network example 128
path cost 142
port priority 142
revision level 141

management port 113

MSTP (Multiple Spanning Tree Protocol) 125

managing the device
good habits 28
using FTP. See FTP.
using SNMP. See SNMP.
using Telnet. See command interface.
using the command interface. See command
interface.
using the web configurator. See web
configurator.

MTU (Multi-Tenant Unit) 82

MAC filter
and ARP inspection 234
MAC freeze 170
MAC table 371
how it works 371
viewing 372
maintanence
configuration backup 333
firmware 331
restoring configuration 332
maintenance 329
current configuration 329
main screen 329

man-in-the-middle attacks 234
max

XGS-4728F User’s Guide

multicast 199
802.1 priority 201
and IGMP 199
IGMP throttling 203
IP addresses 199
overview 199
setup 201
multicast delivery tree 296
multicast group 205

417

Index
multicast router (‘mrouter’) 296

OSPF (Open Shortest Path First) 277

multicast VLAN 211

OSPF redistribution 285

Multiple Spanning Tree Instance, See MSTI 128
Multiple Spanning Tree Protocol 127
Multiple Spanning Tree Protocol, See MSTP. 125
Multiple STP 127

P

Multiple STP, see MSTP 128

PAGP 266

MVR 207
configuration 209
group configuration 211
network example 207

password 51
administrator 348

MVR (Multicast VLAN Registration) 207

N
network management system (NMS) 338
NTP (RFC-1305) 81

PHB (Per-Hop Behavior) 299
ping, test connection 358
policy 182, 184
and classifier 182
and DiffServ 179
configuration 182
example 185
overview 179
rules 179, 180
viewing 183
policy configuration 184
Port Aggregation Protocol, see PAgP

O
OSPF 277
advantages 277
area 277, 283
Area 0 277
area ID 283
authentication 283, 284
autonomous system 277
backbone 277
configuration steps 279
general settings 282
how it works 278
interface 278, 280, 286
link state database 278, 280
network example 278
priority 279
redistribute route 285
route cost 284
router elections 279
router ID 282
router types 278
status 280
stub area 277, 284
virtual link 279
virtual links 288
vs RIP 277

418

port authentication 163
and RADIUS 217
IEEE802.1x 166, 167, 219
MAC authentication 164
port based IGMP 293
port based VLAN type 84
port cloning 383, 384
advanced settings 383, 384
basic settings 383, 384
port details 73
port isolation 113
port mirroring 151, 152, 398
direction 152
egress 152
ingress 152
port redundancy 154
port security 169
address learning 171
limit MAC address learning 171
MAC address learning 169
overview 169
setup 170, 257, 265
port setup 89
port status 71
port VLAN trunking 97

XGS-4728F User’s Guide

Index
port-based VLAN 110
all connected 113
port isolation 113
settings wizard 113
ports
“standby” 154
diagnostics 358
mirroring 151
speed/duplex 90
power
voltage 79
power module
current rating 40
power wire 40
power specification 393
power status 79
power wires 40
priority level 85
priority, and OSPF 279
priority, queue assignment 85
private VLAN 267
configuration 268
isolated port 267
overview 267
promiscuous port 267
product registration 411
protocol based VLAN 106
and IEEE 802.1Q tagging 106
example 109
hexadecimal notation for protocols 105, 108
isolate traffic 106
priority 105, 108
PVID 96, 103
PVID (Priority Frame) 96

R
RADIUS 216
advantages 216
and authentication 216
Network example 216
server 216
settings 217
setup 217
Rapid Spanning Tree Protocol, See RSTP. 125
reboot
load configuration 331
reboot system 331
redistribute route 285
reducing routing table size 285
registration
product 411
related documentation 3
remote management 355
service 356
trusted computers 356
resetting 52, 330
to factory default settings 330
restoring configuration 52, 332
Reverse Path Forwarding (RPF) 296
Reverse Path Multicasting (RPM) 295
RFC 3164 359
RIP 285
configuration 275
direction 275
overview 275
version 275
vs OSPF 277
RIP (Routing Information Protocol) 275
Round Robin Scheduling 188

Q
QoS 398
and classifier 173
queue weight 188
queuing 187
SPQ 188
WFQ 188
WRR 188

route cost 286
router ID 282
routing domain 86, 319
routing protocols 399
routing table 381
RSTP 125
rubber feet 31

queuing method 187, 190

XGS-4728F User’s Guide

419

Index

S
safety warnings 7
save configuration 51, 330
Secure Shell See SSH
security 399
service access control 354
service port 355
Simple Network Management Protocol, see
SNMP
SNMP 28, 338
agent 338
and MIB 338
authentication 345
communities 344
management model 338
manager 338
MIB 339
network components 338
object variables 338
protocol operations 339
security 345
setup 344
traps 346
version 3 and security 339
versions supported 338

status 46, 71
LED 41
link aggregation 155
OSPF 280
port 71
port details 73
power 79
STP 134, 138, 143
VLAN 99
VRRP 318

SNMP traps 340
supported 340, 341, 343

STP 125, 266, 398
bridge ID 135, 138
bridge priority 133, 137
configuration 132, 136, 140
designated bridge 126
forwarding delay 133, 137
Hello BPDU 126
Hello Time 133, 135, 137, 139
how it works 126
Max Age 133, 135, 137, 139
path cost 126, 134, 137
port priority 134, 137
port state 127
root port 126
status 134, 138, 143
terminology 125
vs loop guard 255

Spanning Tree Protocol, See STP. 125

stub area 277, 284

SPQ (Strict Priority Queuing) 188

stub area, See also OSPF 284

SSH
encryption methods 350
how it works 349
implementation 350

subnet based VLANs 103
and DHCP VLAN 105
and priority 104
configuration 104

SSH (Secure Shell) 348

summary address 285, 286

SSL (Secure Socket Layer) 350

switch lockout 52

standby ports 154

switch reset 52

static bindings 231

switch setup 84

static MAC address 115

switching 398

static MAC forwarding 104, 107, 115

syntax conventions 5

static multicast address 119

syslog 235, 359
protocol 359
server setup 361
settings 360
setup 360
severity levels 359

static multicast forwarding 119
static routes 273, 274
static trunking example 160
Static VLAN 100
static VLAN

420

control 102
tagging 102

system information 78

XGS-4728F User’s Guide

Index
system log 357

Type of Service (ToS) 299

system reboot 331

U
T
UDLD 266
TACACS+ 216
setup 219

UniDirectional Link Detection, see UDLD

TACACS+ (Terminal Access Controller AccessControl System Plus) 215

untrusted ports
ARP inspection 235
DHCP snooping 232

tagged VLAN 95

user profiles 216

temperature 394
temperature indicator 78
time
current 81
time zone 81
Time (RFC-868) 81
time server 81
time service protocol 81
format 81
Time To Live (TTL) 297
trademarks 409
transceiver
installation 37
removal 37
translating RIP into OSPF 285
traps
destination 345
TRTCM
and bandwidth control 304
and DiffServ 304
color-aware mode 301
color-blind mode 301
setup 303
trunk group 153
trunking 153, 398
example 160
trusted ports
ARP inspection 235
DHCP snooping 232
Tunnel Protocol Attribute, and RADIUS 225
tutorials 61
DHCP snooping 61
Two Rate Three Color Marker (TRTCM) 300
Two Rate Three Color Marker, see TRTCM 300

XGS-4728F User’s Guide

V
Vendor Specific Attribute See VSA
ventilation holes 32
VID 88, 95, 99, 100, 193
number of possible VIDs 95
priority frame 95
VID (VLAN Identifier) 95
virtual links 288
virtual links, and OSPF 279
Virtual Router
status 319
Virtual Router (VR) 317
Virtual Router Redundancy Protocol (VRRP) 317
VLAN 82, 95, 398
acceptable frame type 103
automatic registration 96
ID 95
ingress filtering 103
introduction 82
number of VLANs 99
port number 100
port settings 102
port-based VLAN 110
port-based, all connected 113
port-based, isolation 113
port-based, wizard 113
static VLAN 100
status 99, 100
tagged 95
trunking 97, 103
type 84, 98
VLAN (Virtual Local Area Network) 82

421

Index
VLAN mapping 259
activating 260
configuration 261
example 259
priority level 259
tagged 259
traffic flow 259
untagged 259
VLAN ID 259
VLAN number 88
VLAN stacking 191, 193
configuration 194
example 191
frame format 193
port roles 192, 195
port-based Q-in-Q 195
priority 193
selective Q-in-Q 196
VLAN Trunking Protocol, see VTP
VLAN, protocol based, See protocol based VLAN
VLAN, subnet based, See subnet based VLANs
103

W
warranty 411
note 411
web configurator 28, 45
getting help 54
home 46
login 45
logout 54
navigation panel 48
weight, queuing 188
Weighted Round Robin Scheduling (WRR) 188
WFQ (Weighted Fair Queuing) 188
WRR (Weighted Round Robin Scheduling 188

Z
ZyNOS (ZyXEL Network Operating System) 334

VRID (Virtual Router ID) 318
VRRP 317
advertisement interval 321
authentication 320
backup router 317
configuration example 323
Hello message 321
how it works 317
interface setup 319
master router 317
network example 317, 324
parameters 321
preempt mode 321, 322
priority 321, 322
status 318
uplink gateway 322
uplink status 319
Virtual Router 317
Virtual Router ID 322
VRID 318
VSA 224
VTP 266

422

XGS-4728F User’s Guide



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