Comtrend NL-3111U A/VDSL Bonded Router User Manual UM NexusLink 3111u draft
Comtrend Corporation A/VDSL Bonded Router UM NexusLink 3111u draft
  
    Comtrend   >  
Contents
- 1. 5.Users manual-1R1
- 2. 5.Users manual-2 R1
5.Users manual-1R1

  1
Preface 
This manual provides information related to the installation and operation of this 
device.  The individual reading this manual is presumed to have a basic 
understanding of telecommunications terminology and concepts.   
If you find the product to be inoperable or malfunctioning, please contact technical 
support for immediate service by email at INT-support@comtrend.com 
For product update, new product release, manual revision, or software upgrades, 
please visit our website at http://www.comtrend.com 
Important Safety Instructions 
With reference to unpacking, installation, use, and maintenance of your electronic 
device, the following basic guidelines are recommended: 
•  Do not use or install this product near water, to avoid fire or shock hazard.  For 
example, near a bathtub, kitchen sink or laundry tub, or near a swimming pool.  
Also, do not expose the equipment to rain or damp areas (e.g. a wet basement). 
•  Do not connect the power supply cord on elevated surfaces.  Allow it to lie freely.  
There should be no obstructions in its path and no heavy items should be placed 
on the cord.  In addition, do not walk on, step on, or mistreat the cord. 
•  Use only the power cord and adapter that are shipped with this device. 
•  To safeguard the equipment against overheating, make sure that all openings in 
the unit that offer exposure to air are not blocked. 
•  Avoid using a telephone (other than a cordless type) during an electrical storm.  
There may be a remote risk of electric shock from lightening.  Also, do not use 
the telephone to report a gas leak in the vicinity of the leak. 
•  Never install telephone wiring during stormy weather conditions. 
CAUTION: 
n  To reduce the risk of fire, use only No. 26 AWG or larger 
telecommunication line cord. 
n  Always disconnect all telephone lines from the wall outlet before servicing 
or disassembling this equipment. 
  WARNING 
n  Disconnect the power line from the device before servicing.  
n  Power supply specifications are clearly stated in Appendix C - 
Specifications.  
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  2
FCC Compliance 
This equipment has been tested and found to comply with the limits for a Class B 
Digital Device, pursuant to part 15 of the FCC Rules. These limits are designed to 
provide reasonable protection against harmful interference in a residential 
installation. This equipment generates, uses and can radiate radio frequency energy 
and, if not installed and used in accordance with the instruction, may cause harmful 
interference to radio communication. However, there is no grantee that interference 
will not occur in a particular installation. If this equipment does cause harmful 
interference to radio or television reception, which can be determined by turning the 
equipment off and on, the user is encouraged to try to correct the interference by 
one or more of the following measures: 
 •  Reorient or relocate the receiving antenna 
•  Increase the separation between the equipment and receiver 
•  Connect the equipment into an outlet on a circuit different from that to which  
 the receiver is connected 
•  Consult the dealer or an experienced radio/TV technician for help. 
The changes or modifications not expressly approved by the party responsible for 
compliance could void the user's authority to operate the equipment. 
To comply with the FCC RF exposure compliance requirements, this device and its 
antenna must not be co-located or operating to conjunction with any other antenna 
or transmitter. 
This equipment should be installed and operated with minimum distance 20cm 
between the radiator & your body. 
Copyright 
Copyright© 2013 Comtrend Corporation.  All rights reserved. The information 
contained herein is proprietary to Comtrend Corporation.  No part of this document 
may be translated, transcribed, reproduced, in any form, or by any means without 
the prior written consent of Comtrend Corporation. 
This program is free software: you can redistribute it and/or modify it under the 
terms of the GNU General Public License as published by the Free Software 
Foundation, either version 3 of the License, or (at your option) any later version. 
This program is distributed in the hope that it will be useful, but WITHOUT ANY 
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS 
FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more 
details. 
You should have received a copy of the GNU General Public License 
along with this program.  If not, see http://www.gnu.org/licenses/   
NOTE:   This document is subject to change without notice. 
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  3
Protect Our Environment 
This symbol indicates that when the equipment has reached the end of  
its useful life, it must be taken to a recycling centre and processed  
separate from domestic waste. 
The cardboard box, the plastic contained in the packaging, and the parts that make 
up this router can be recycled in accordance with regionally established regulations.  
Never dispose of this electronic equipment along with your household waste; you 
may be subject to penalties or sanctions under the law.  Instead, please be 
responsible and ask for disposal instructions from your local government. 
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  4
Table of Contents 
CHAPTER 1 INTRODUCTION...........................................................................................................6 
1.1 FEATURES ........................................................................................................................................6 
1.2 APPLICATION ...................................................................................................................................7 
CHAPTER 2 INSTALLATION.............................................................................................................8 
2.1 HARDWARE SETUP...........................................................................................................................8 
2.2 LED INDICATORS...........................................................................................................................10 
CHAPTER 3 WEB USER INTERFACE............................................................................................12 
3.1 DEFAULT SETTINGS........................................................................................................................12 
3.2 IP CONFIGURATION........................................................................................................................12 
3.3 LOGIN PROCEDURE........................................................................................................................15 
CHAPTER 4 DEVICE INFORMATION...........................................................................................17 
4.1 WAN.............................................................................................................................................18 
4.2 STATISTICS.....................................................................................................................................19 
4.2.1 LAN Statistics..................................................................................................................19 
4.2.2   WAN Statistics.................................................................................................................20 
4.2.3 ATM Statistics.................................................................................................................21 
4.2.4 xDSL Statistics................................................................................................................22 
4.3 ROUTE ...........................................................................................................................................25 
4.4 ARP...............................................................................................................................................26 
4.5 DHCP............................................................................................................................................27 
CHAPTER 5 ADVANCED SETUP.....................................................................................................28 
5.1 LAYER 2 INTERFACE ......................................................................................................................28 
5.1.1 ATM Interface.................................................................................................................28 
5.1.2 PTM Interface.................................................................................................................29 
5.1.3 ETH INTERFACE...........................................................................................................29 
5.2 WAN SERVICE ...............................................................................................................................30 
5.3 LAN..............................................................................................................................................31 
5.4 IPV6 LAN AUTO CONFIGURATION ................................................................................................33 
5.5 NAT...............................................................................................................................................34 
5.5.1 Virtual Servers................................................................................................................34 
5.5.2 Port Triggering...............................................................................................................35 
5.5.3 DMZ Host.......................................................................................................................37 
5.6 SECURITY ......................................................................................................................................38 
5.6.1 IP Filtering.....................................................................................................................38 
5.6.2 MAC Filtering.................................................................................................................41 
5.7 PARENTAL CONTROL......................................................................................................................42 
5.7.1 Time Restriction..............................................................................................................42 
5.7.2 URL Filter.......................................................................................................................43 
5.8 QUALITY OF SERVICE (QOS)..........................................................................................................45 
5.8.1 Queue Management Configuration.................................................................................45 
5.8.2 Queue Configuration......................................................................................................46 
5.8.3 QoS Classification..........................................................................................................47 
5.9 ROUTING .......................................................................................................................................49 
5.9.1 Default Gateway.............................................................................................................49 
5.9.2 Static Route.....................................................................................................................50 
5.9.3 Policy Routing................................................................................................................51 
5.9.4 RIP..................................................................................................................................52 
5.10 DNS............................................................................................................................................53 
5.10.1 DNS Server.....................................................................................................................53 
5.10.2 Dynamic DNS.................................................................................................................54 
5.11 DSL.............................................................................................................................................56 
5.12 DSL BONDING.............................................................................................................................58 
5.13 UPNP...........................................................................................................................................59 
5.14 DNS PROXY ................................................................................................................................60 
5.15 PRINT SERVER..............................................................................................................................61 
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5.16 INTERFACE GROUPING.................................................................................................................62 
5.17 IP SEC..........................................................................................................................................64 
5.18 CERTIFICATE ................................................................................................................................67 
5.18.1 Local...............................................................................................................................67 
5.18.2 Trusted CA......................................................................................................................70 
5.19 MULTICAST..................................................................................................................................71 
CHAPTER 6 WIRELESS....................................................................................................................72 
6.1 BASIC ............................................................................................................................................72 
6.2 SECURITY ......................................................................................................................................74 
6.2.1 WPS.......................................................................................................................................76 
6.3 MAC FILTER..................................................................................................................................81 
6.4 WIRELESS BRIDGE .........................................................................................................................82 
6.5 ADVANCED ....................................................................................................................................83 
6.6 STATION INFO ................................................................................................................................86 
CHAPTER 7 DIAGNOSTICS.............................................................................................................87 
CHAPTER 8 MANAGEMENT...........................................................................................................88 
8.1 SETTINGS.......................................................................................................................................88 
8.1.1 Backup Settings...............................................................................................................88 
8.1.2 Update Settings...............................................................................................................88 
8.1.3 Restore Default...............................................................................................................89 
8.2 SYSTEM LOG .................................................................................................................................90 
8.3 SNMP AGENT................................................................................................................................92 
8.4 TR-069 CLIENT .............................................................................................................................93 
8.5 INTERNET TIME..............................................................................................................................94 
8.6 ACCESS CONTROL..........................................................................................................................95 
8.6.1 Passwords.......................................................................................................................95 
8.7 UPDATE SOFTWARE........................................................................................................................95 
8.8 REBOOT.........................................................................................................................................96 
APPENDIX A - FIREWALL................................................................................................................97 
APPENDIX B - PIN ASSIGNMENTS..............................................................................................100 
APPENDIX C - SPECIFICATIONS.................................................................................................101 
APPENDIX D - SSH CLIENT...........................................................................................................104 
APPENDIX E - WSC EXTERNAL REGISTRAR..........................................................................105 
APPENDIX F - PRINTER SERVER................................................................................................108 
APPENDIX G - CONNECTION SETUP.........................................................................................114 
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  6
Chapter 1 Introduction 
The NEXUSLINK 3111u MULTI-DSL Bonded Router features flexible networking 
connectivity with dual DSL line capability, four 10/100 Ethernet ports, one Gigabit 
Ethernet port and one USB Host port.  It has robust routing capabilities to segment 
and direct data streams and allows for multiple data encapsulations. 
An integrated 802.11n (draft) WLAN Access Point (AP) provides faster wireless 
connections with increased range, when compared with 802.11b and 802.11g, 
without sacrificing backwards compatibility with these older wireless standards. 
WPS (Wi-Fi Protected Setup) and Wi-Fi On/Off buttons are positioned on the front 
panel for easy wireless network setup and control. 
1.1 Features 
•  Integrated 802.11n AP  
(802.11b/g backward-compatible)  •  Firmware upgrade and configuration
•  MULTI-DSL 12a/12b profile support  •  Auto PVC configuration 
•  IP and Per-VC packet level QoS  •  Supports up to 8 VCs 
•  WPA/WPA2 and 802.1x  •  WMM & UPnP 
•  RADIUS client  •  IP/MAC filtering 
•  Static routing & RIP/RIP v2  •  Dynamic IP assignment 
•  NAT/PAT  •  Parental Control 
•  IGMP Proxy and fast leave  •  DHCP Server/Client 
•  Web-based management  •  DNS Relay/Proxy 
•  Supports remote administration  •  FTP/TFTP server 
•  Configuration backup and restoration
•  TR-069/TR-098/TR-104/TR-111 
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Chapter 2 Installation 
2.1 Hardware Setup  
Follow the instructions below to complete the hardware setup. 
BACK PANEL 
The figure below shows the back panel of the device. 
1.2  
Power ON 
Press the power button to the OFF position (OUT). Connect the power adapter to the 
power port. Attach the power adapter to a wall outlet or other AC source. Press the 
power button to the ON position (IN). If the Power LED displays as expected then 
the device is ready for setup (see section 2.2 LED Indicators). 
Caution 1: If the device fails to power up, or it malfunctions, first verify that the 
power cords are connected securely and then power it on again. If the 
problem persists, contact technical support. 
Caution 2: Before servicing or disassembling this equipment, disconnect all power 
cords and telephone lines from their outlets. 
Reset Button 
Restore the default parameters of the device by pressing the Reset button for 5 to 
10 seconds. After the device has rebooted successfully, the front panel should 
display as expected (see section 2.2 LED Indicators for details).   
NOTE:   If pressed down for more than 20 seconds, the NEXUSLINK 3111u will go 
into a firmware update state (CFE boot mode).  The firmware can then 
be updated using an Internet browser pointed to the default IP address. 
Ethernet (LAN) Ports 
Use 10/100 BASE-T RJ-45 cables to connect up to four network devices. These ports 
are auto-sensing MDI/X; so either straight-through or crossover cable can be used. 
Gb ETH Port 
Use RJ45 straight through or crossover MDI/X cable to connect to Ethernet WAN. 
DSL Port  
Reset Button 
Power Port
Ethernet (LAN) Ports
Ethernet (LAN) Ports
DSL Port 
Power Button
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Connect to an VDSL with this RJ11 Port.  This device contains a micro filter which 
removes the analog phone signal.  If you wish, you can connect a regular telephone 
to the same line by using a POTS splitter. 
FRONT PANEL 
The Wi-Fi & WPS buttons are located on the bottom-left of the front panel, as shown. 
WiFi Switch 
Press this button to enable/disable the wireless LAN (WLAN). 
WPS Button 
Press this button to begin searching for WPS clients. These clients must also enable 
WPS push button mode (see 6.2.1 WPS for instructions). 
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2.2 LED Indicators 
The front panel LED indicators are shown below and explained in the following table. 
This information can be used to check the status of the device and its connections. 
 LED  Color
Mode
Description 
On Power on 
Green
Off  Power off 
POWER
Red  On 
POST (Power On Self Test) failure (not bootable) or 
Device malfunction1 
On IP connected and no traffic detected2 
Off  Modem power off or modem in bridged mode 
Green
Blink  IP connected and IP Traffic is passing th
ru the 
device (either direction) 
INTERNET
Red  On 
Device attempted to become IP connected and 
failed (no DHCP response, no PPPoE response, 
PPPoE authentication failed, no IP address from 
IPCP, etc.) 
On The DSL1 link is established. 
Off  The DSL1 link is not established. 
DSL1  Green
Blink 
DSL1 attempting sync:  
l 
Flashing at 2 Hz with a 50% duty cycle when 
trying to detect carrier signal 
l 
Flashing at 4 Hz with a 50% duty cycle when 
the carrier has been detected and the modem 
is trying to train 
On The DSL2 link is established. 
DSL2  Green
Off  The DSL2 link is not established. 
1 A malfunction is any error of internal sequence or state that will prevent the device from 
connecting to the DSLAM or passing customer data. This may be identified at various times 
such after power on or during operation through the use of self testing or in operations which 
result in a unit state that is not expected or should not occur. 
2 IP connected (the device has a WAN IP address from IPCP or DHCP and DSL is up or a 
static IP address is configured, PPP negotiation has successfully complete – if used – and DSL 
is up ) and no traffic detected. If the IP or PPPoE session is dropped for any other reason, the 
light is turned off. The light will turn red when it attempts to reconnect and DHCP or PPPoE 
fails 
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Blink 
DSL2 attempting sync:  
l 
Flashing at 2 Hz with a 50% duty cycle when 
trying to detect carrier signal 
l 
Flashing at 4 Hz with a 50% duty cycle when 
the carrier has been detected and the 
modem 
is trying to train 
On The wireless module is ready. 
Off  The wireless module is not installed. 
Wireless
Green
Blink Data transmitting or receiving over WLAN. 
On  WPS enabled and PC connected to WLAN 
Off 
l WPS disenabled when WPS configured 
l After clients connected to router about 5 
minutes, LED is off 
WPS  Green
Blink  The router is searching for WPS clients or WPS 
un-configured. 
On  Powered device connected to the associated port 
Off  No activity, modem power off, no cable or no 
powered device connected to the associated port 
Yellow 
(for 
10/100)
Blink  Traffic is passing 
On  Powered device connected to the associated port 
Off  No activity, modem power off, no cable or no 
powered device connected to the associated port 
ETH 1 
Green 
(for 
1000)  Blink  Traffic is passing 
On 
Powered device connected to the associated port 
(includes devices with wake-on-LAN capability 
where a slight voltage is supplied to an Ethernet 
connection) 
Off  No activity, modem power off, no cable or no 
powered device connected to the associated port 
ETH 2~4
Green
Blink  LAN activity present (traffic in either direction) 
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Chapter 3 Web User Interface 
This section describes how to access the device via the web user interface (WUI) 
using an Internet browser such as Internet Explorer (version 5.0 and later).   
3.1 Default Settings 
The factory default settings of this device are summarized below. 
•  LAN IP address: 192.168.1.1 
•  LAN subnet mask: 255.255.255.0 
•  Administrative access (username: root , password: 12345) 
•  User access (username: user, password: user) 
•  Remote (WAN) access (username: support, password: support) 
•  WLAN access: enabled 
Technical Note 
During power on, the device initializes all settings to default values.  It will then 
read the configuration profile from the permanent storage section of flash memory.  
The default attributes are overwritten when identical attributes with different values 
are configured.  The configuration profile in permanent storage can be created via 
the web user interface or telnet user interface, or other management protocols.  
The factory default configuration can be restored either by pushing the reset button 
for more than five seconds until the power indicates LED blinking or by clicking the 
Restore Default Configuration option in the Restore Settings screen. 
3.2 IP Configuration 
DHCP MODE 
When the NEXUSLINK 3111u powers up, the onboard DHCP server will switch on. 
Basically, the DHCP server issues and reserves IP addresses for LAN devices, such 
as your PC. 
To obtain an IP address from the DCHP server, follow the steps provided below.   
NOTE:  The following procedure assumes you are running Windows XP.  
However, the general steps involved are similar for most operating 
systems (OS). Check your OS support documentation for further details. 
STEP 1:  From the Network Connections window, open Local Area Connection (You 
may also access this screen by double-clicking the Local Area Connection 
icon on your taskbar). Click the Properties button. 
STEP 2: Select Internet Protocol (TCP/IP) and click the Properties button.  
STEP 3:  Select Obtain an IP address automatically as shown below. 
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STATIC IP MODE 
In static IP mode, you assign IP settings to your PC manually. 
Follow these steps to configure your PC IP address to use subnet 192.168.1.10. 
NOTE:  The following procedure assumes you are running Windows XP.  
However, the general steps involved are similar for most operating 
systems (OS). Check your OS support documentation for further details. 
STEP 1: From the Network Connections window, open Local Area Connection (You 
may also access this screen by double-clicking the Local Area Connection 
icon on your taskbar). Click the Properties button. 
STEP 2: Select Internet Protocol (TCP/IP) and click the Properties button. 
STEP 3: Change the IP address to the 192.168.1.10 subnet with subnet mask of 
255.255.255.0. The screen should now display as shown below. 
STEP 4:  Click OK to submit these settings. 
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3.3 Login Procedure 
Perform the following steps to login to the web user interface.   
NOTE:  The default settings can be found in 3.1 Default Settings. 
STEP 1:  Start the Internet browser and enter the default IP address for the device 
in the Web address field. For example, if the default IP address is 
192.168.1.1, type http://192.168.1.1. 
NOTE:  For local administration (i.e. LAN access), the PC running the browser 
must be attached to the Ethernet, and not necessarily to the device.   
For remote access (i.e. WAN), use the IP address shown on the Chapter 4 
Device Information screen and login with remote username and 
password. 
STEP 2:  A dialog box will appear, such as the one below.  Enter the default 
username and password, as defined in section 3.1 Default Settings. 
 Click OK to continue. 
NOTE:  The login password can be changed later (see 8.6.1 Passwords). 
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Chapter 4 Device Information 
The web user interface window is divided into two frames, the main menu (at left) 
and the display screen (on the right). The main menu has several options and 
selecting each of these options opens a submenu with more selections. 
NOTE:   The menu items shown are based upon the configured connection(s) and 
user account privileges. 
Device Info is the first selection on the main menu so it will be discussed first.  
Subsequent chapters will introduce the other main menu options in sequence. 
To display the Device Info Summary screen, tick the Skip Quick setup box and click 
Apply/Save. 
This screen shows hardware, software, IP settings and other related information. 
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4.1 WAN 
Select WAN from the Device Info submenu to display the configured PVC(s). 
Heading  Description 
Interface   Name of the interface for WAN 
Description  Name of the WAN connection 
Type  Shows the connection type  
VlanMuxId  Shows 802.1Q VLAN ID 
IPv6  Shows WAN IPv6 address 
IGMP  Shows Internet Group Management Protocol (IGMP) status 
MLD  Shows Multicast Listener Discovery (MLD) status 
NAT  Shows Network Address Translation (NAT) status 
Firewall  Shows the status of Firewall 
Status  Lists the status of DSL link 
IPv4 Address  Shows WAN IPv4 address 
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4.2 Statistics 
This selection provides LAN, WAN, ATM/PTM and xDSL statistics. 
NOTE:  These screens are updated automatically every 15 seconds.  
Click Reset Statistics to perform a manual update. 
4.2.1 LAN Statistics 
This screen shows data traffic statistics for each LAN interface. 
Heading  Description 
Interface  LAN interface(s) 
Received/Transmitted: - Bytes 
 - Pkts 
 - Errs 
 - Drops 
Number of Bytes  
Number of Packets  
Number of packets with errors 
Number of dropped packets  
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4.2.2  WAN Statistics 
This screen shows data traffic statistics for each WAN interface. 
Heading  Description 
Interface  WAN interfaces 
Description  WAN service label 
Received/Transmitted   -  Bytes 
                        -  Pkts 
                        -  Errs 
                        -  Drops 
Number of Bytes  
Number of Packets  
Number of packets with errors 
Number of dropped packets  
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4.2.3 ATM Statistics 
The following figure shows Asynchronous Transfer Mode (ATM) statistics. 
XTM Interface Statistics 
Heading  Description 
Port Number  ATM PORT (0-3) 
In Octets  Number of received octets over the interface 
Out Octets  Number of transmitted octets over the interface 
In Packets  Number of packets received over the interface 
Out Packets  Number of packets transmitted over the interface 
In OAM Cells  Number of OAM Cells received over the interface 
Out OAM Cells  Number of OAM Cells transmitted over the interface. 
In ASM Cells  Number of ASM Cells received over the interface 
Out ASM Cells  Number of ASM Cells transmitted over the interface 
In Packet 
Errors  Number of packets in Error 
In Cell Errors  Number of cells in Error 
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Field  Description 
Mode  VDSL, MULTI-DSL 
Traffic Type  ATM, PTM 
Status  Lists the status of the DSL link 
Link Power State  Link output power state. 
Line Coding (Trellis)  Trellis On/Off 
SNR Margin (0.1 dB)  Signal to Noise Ratio (SNR) margin 
Attenuation (0.1 dB)  Estimate of average loop attenuation in the downstream 
direction. 
Output Power  
(0.1 dBm)  Total upstream output power 
Attainable Rate (Kbps)
The sync rate you would obtain. 
Rate (Kbps)  Current sync rates downstream/upstream  
In VDSL mode, the following section is inserted. 
B  Number of bytes in Mux Data Frame 
M  Number of Mux Data Frames in a RS codeword 
T   Number of Mux Data Frames in an OH sub-frame 
R   Number of redundancy bytes in the RS codeword 
S   Number of data symbols the RS codeword spans 
L   Number of bits transmitted in each data symbol 
D   The interleaver depth 
I  The interleaver block size in bytes 
N  RS codeword size 
Delay   The delay in milliseconds (msec) 
INP  DMT symbol 
OH Frames  Total number of OH frames 
OH Frame Errors  Number of OH frames received with errors 
RS Words  Total number of Reed-Solomon code errors 
RS Correctable Errors Total Number of RS with correctable errors 
RS Uncorrectable 
Errors   Total Number of RS words with uncorrectable errors 
HEC Errors  Total Number of Header Error Checksum errors 
OCD Errors  Total Number of Out-of-Cell Delineation errors 
LCD Errors  Total number of Loss of Cell Delineation 
Total Cells  Total number of ATM cells (including idle + data cells) 
Data Cells  Total number of ATM data cells 
Bit Errors  Total number of bit errors 
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Total ES  Total Number of Errored Seconds 
Total SES  Total Number of Severely Errored Seconds  
Total UAS  Total Number of Unavailable Seconds 
xDSL BER TEST 
Click xDSL BER Test on the xDSL Statistics screen to test the Bit Error Rate (BER). 
A small pop-up window will open after the button is pressed, as shown below. 
Click Start to start the test or click Close to cancel the test. After the BER testing is 
complete, the pop-up window will display as follows.  
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4.3 Route 
Choose Route to display the routes that the NEXUSLINK 3111u has found.  
Field  Description 
Destination  Destination network or destination host 
Gateway  Next hub IP address 
Subnet Mask  Subnet Mask of Destination 
Flag  U: route is up 
 !: reject route 
G: use gateway 
H: target is a host 
R: reinstate route for dynamic routing 
D: dynamically installed by daemon or redirect 
M: modified from routing daemon or redirect 
Metric  The 'distance' to the target (usually counted in hops).  It is not 
used by recent kernels, but may be needed by routing daemons.
Service  Shows the WAN connection label 
Interface  Shows connection interfaces 
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4.4 ARP 
Click ARP to display the ARP information. 
Field  Description 
IP address  Shows IP address of host pc 
Flags  Complete, Incomplete, Permanent, or Publish 
HW Address
Shows the MAC address of host pc 
Device  Shows the connection interface   
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4.5 DHCP 
Click DHCP to display all DHCP Leases. 
Field  Description 
Hostname  Shows the device/host/PC network name 
MAC Address  Shows the Ethernet MAC address of the device/host/PC 
IP Address  Shows IP address of device/host/PC 
Expires In  Shows how much time is left for each DHCP Lease 
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Chapter 5 Advanced Setup  
5.1 Layer 2 Interface 
The ATM, PTM and ETH WAN interface screens are described here. 
5.1.1 ATM Interface 
Add or remove ATM interface connections here.  
Click Add to create a new ATM interface (see Appendix G). 
NOTE:  Up to 8 ATM interfaces can be created and saved in flash memory. 
To remove a connection, select its Remove column radio button and click Remove. 
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5.1.2 PTM Interface 
Add or remove PTM interface connections here.   
Click Add to create a new connection (see Appendix G - Connection Setup). To 
remove a connection, select its Remove column radio button and click Remove. 
5.1.3 ETH INTERFACE 
This screen displays the Ethernet WAN Interface configuration.  
NOTE: This option only applies to models with an Ethernet WAN port. 
Click Add to create a new connection (see Appendix G - Connection Setup). 
NOTE: One Ethernet WAN interface can be created and saved in flash memory.   
To remove a connection, select its Remove column radio button and click remove. 
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5.2 WAN Service 
This screen allows for the configuration of WAN interfaces. 
Click the Add button to create a new connection. For connections on ATM or ETH 
WAN interfaces see Appendix G - Connection Setup.  
NOTE: ETH and ATM service connections cannot coexist. In Default Mode, up to 
8 WAN connections can be configured; while VLAN Mux and MSC 
Connection Modes support up to 8 WAN connections. 
To remove a connection, select its Remove column radio button and click Remove. 
Heading  Description 
Interface   Name of the interface for WAN 
Description  Name of the WAN connection 
Type  Shows the connection type  
Vlan8021p  VLAN ID is used for VLAN Tagging (IEEE 802.1Q) 
VlanMuxId  Shows 802.1Q VLAN ID 
ConnId  Connection ID 
IGMP  Shows Internet Group Management Protocol (IGMP) status 
NAT  Shows Network Address Translation (NAT) status 
Firewall  Shows the Security status 
IPv6  Shows the WAN IPv6 address 
MLD  Shows Multicast Listener Discovery (MLD) status 
Remove  Select interfaces to remove 
To remove a connection, select its Remove column radio button and click Remove. 
To Add a new WAN connection, click the Add button and follow the instructions. 
NOTE:  Up to 8 PVC profiles can be configured and saved in flash memory.  Also, 
ETH and PTM/ATM service connections cannot coexist. 
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5.3 LAN 
Configure the LAN interface settings and then click Apply/Save. 
Consult the field descriptions below for more details. 
GroupName: Select an Interface Group. 
1st LAN INTERFACE 
IP Address: Enter the IP address for the LAN port. 
Subnet Mask: Enter the subnet mask for the LAN port. 
Enable IGMP Snooping:  Enable by ticking the checkbox þ. 
  Standard Mode:  In standard mode, multicast traffic will flood to all  
  bridge ports when no client subscribes to a multicast  
  group – even if IGMP snooping is enabled. 
  Blocking Mode:  In blocking mode, the multicast data traffic will be  
  blocked and not flood to all bridge ports when there are 
  no client subscriptions to any multicast group. 
Enhanced IGMP: When enabled, IGMP packets will not flood to all bridge ports. 
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Enable LAN side firewall: Enable by ticking the checkbox þ. 
DHCP Server:  To enable DHCP, select Enable DHCP server and enter Start and 
End IP addresses and the Leased Time. This setting configures the 
router to automatically assign IP, default gateway and DNS server 
addresses to every PC on your LAN.   
Static IP Lease List:  A maximum of 32 entries can be configured. 
To add an entry, enter MAC address and Static IP and then click Save/Apply. 
To remove an entry, tick the corresponding checkbox þ in the Remove column and 
then click the Remove Entries button, as shown below. 
2ND LAN INTERFACE 
To configure a secondary IP address, tick the checkbox þ outlined (in RED) below. 
IP Address: Enter the secondary IP address for the LAN port. 
Subnet Mask: Enter the secondary subnet mask for the LAN port. 
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5.4 IPv6 LAN Auto Configuration 
Configure the IPv6 LAN Host options (see below) and then click Save/Apply. 
DHCPv6 Server:  To enable DHCP for IPv6, select the Enable DHCPv6 server 
checkbox þ. This setting enables the router to assign IP settings 
to every IPv6-capable LAN device (IPv6 clients). 
RADVD:  Select the checkbox þ to enable the Router ADVertisement Daemon. 
This provides information that IPv6 clients can use for autoconfiguration 
according to the Neighbour Discovery for IPv6 protocol (RFC2461). 
Enable MLD Snooping:    Enable by ticking the checkbox þ. 
  Standard Mode:  In standard mode, multicast traffic will flood to all  
  bridge ports when no client subscribes to a multicast  
  group – even if snooping is enabled. 
  Blocking Mode:  In blocking mode, the multicast data traffic will be  
  blocked and not flood to all bridge ports when there are 
  no client subscriptions to any multicast group. 
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5.5 NAT 
To display this option, NAT must be enabled in at least one PVC shown on the 
Chapter 5 Advanced Setup. 
5.5.1 Virtual Servers 
Virtual Servers allow you to direct incoming traffic from the WAN side (identified by 
Protocol and External port) to the Internal server with private IP addresses on the 
LAN side. The Internal port is required only if the external port needs to be 
converted to a different port number used by the server on the LAN side.  
A maximum of 32 entries can be configured. 
To add a Virtual Server, click Add. The following will be displayed. 
Consult the table below for field and header descriptions. 
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Field/Header  Description 
Use Interface  Select a WAN interface from the drop-down box. 
Select a Service 
Or  
Custom Service 
User should select the service from the list. 
Or 
User can enter the name of their choice. 
Server IP Address  Enter the IP address for the server. 
External Port Start  Enter the starting external port number (when you select 
Custom Server). When a service is selected, the port ranges 
are automatically configured. 
External Port End  Enter the ending external port number (when you select 
Custom Server). When a service is selected, the port ranges 
are automatically configured. 
Protocol  TCP, TCP/UDP, or UDP. 
Internal Port Start  Enter the internal port starting number (when you select 
Custom Server). When a service is selected the port ranges 
are automatically configured 
Internal Port End  Enter the internal port ending number (when you select 
Custom Server). When a service is selected, the port ranges 
are automatically configured. 
5.5.2 Port Triggering 
Some applications require that specific ports in the firewall be opened for access by 
the remote parties.  Port Triggers dynamically 'Open Ports' in the firewall when an 
application on the LAN initiates a TCP/UDP connection to a remote party using the 
'Triggering Ports'.  The Router allows the remote party from the WAN side to 
establish new connections back to the application on the LAN side using the 'Open 
Ports'.  A maximum 32 entries can be configured. 
To add a Trigger Port, click Add. The following will be displayed. 
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Consult the table below for field and header descriptions. 
Field/Header  Description 
Use Interface  Select a WAN interface from the drop-down box. 
Select an Application 
Or  
Custom Application 
User should select the application from the list. 
Or  
User can enter the name of their choice. 
Trigger Port Start  Enter the starting trigger port number (when you select 
custom application).  When an application is selected, the 
port ranges are automatically configured. 
Trigger Port End  Enter the ending trigger port number (when you select 
custom application).  When an application is selected, the 
port ranges are automatically configured. 
Trigger Protocol  TCP, TCP/UDP, or UDP. 
Open Port Start  Enter the starting open port number (when you select 
custom application).  When an application is selected, the 
port ranges are automatically configured. 
Open Port End  Enter the ending open port number (when you select 
custom application).  When an application is selected, the 
port ranges are automatically configured. 
Open Protocol  TCP, TCP/UDP, or UDP. 
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5.5.3 DMZ Host 
The DSL router will forward IP packets from the WAN that do not belong to any of 
the applications configured in the Virtual Servers table to the DMZ host computer. 
To Activate the DMZ host, enter the DMZ host IP address and click Save/Apply. 
To Deactivate the DMZ host, clear the IP address field and click Save/Apply. 
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5.6 Security 
To display this function, you must enable the firewall feature in WAN Setup.   
For detailed descriptions, with examples, please consult Appendix A - Firewall. 
5.6.1 IP Filtering 
This screen sets filter rules that limit IP traffic (Outgoing/Incoming). Multiple filter 
rules can be set and each applies at least one limiting condition. For individual IP 
packets to pass the filter all conditions must be fulfilled. 
OUTGOING IP FILTER 
By default, all outgoing IP traffic is allowed, but IP traffic can be blocked with filters. 
To add a filter (to block some outgoing IP traffic), click the Add button. 
On the following screen, enter your filter criteria and then click Apply/Save. 
Consult the table below for field descriptions. 
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Field  Description 
Filter Name  The filter rule label. 
IP Version  Select from the drop down menu. 
Protocol  TCP, TCP/UDP, UDP, or ICMP. 
Source IP address  Input source IP address. 
Source Port (port or port:port)  Input source port number or range. 
Destination IP address  Input destination IP address. 
Destination Port (port or port:port)
Input destination port number or range. 
INCOMING IP FILTER 
By default, all incoming IP traffic is blocked, but IP traffic can be allowed with filters. 
To add a filter (to allow incoming IP traffic), click the Add button.  
On the following screen, enter your filter criteria and then click Apply/Save. 
Consult the table below for field descriptions. 
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Field  Description 
Filter Name  The filter rule label 
IP Version  Select from the drop down menu. 
Protocol  TCP, TCP/UDP, UDP, or ICMP. 
Source IP address  Enter source IP address. 
Source Port (port or port:port)  Enter source port number or range. 
Destination IP address  Enter destination IP address. 
Destination Port (port or port:port)
Enter destination port number or range. 
At the bottom of this screen, select the WAN and LAN Interfaces to which the filter 
rule will apply. You may select all or just a subset. WAN interfaces in bridge mode or 
without firewall enabled are not available. 
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5.6.2 MAC Filtering 
NOTE: This option is only available in bridge mode. Other modes use IP Filtering 
to perform a similar function. 
Each network device has a unique 48-bit MAC address. This can be used to filter 
(block or forward) packets based on the originating device. MAC filtering policy and 
rules for the NEXUSLINK 3111u can be set according to the following procedure.  
The MAC Filtering Global Policy is defined as follows. FORWARDED means that all 
MAC layer frames will be FORWARDED except those matching the MAC filter rules.  
BLOCKED means that all MAC layer frames will be BLOCKED except those 
matching the MAC filter rules. The default MAC Filtering Global policy is 
FORWARDED. It can be changed by clicking the Change Policy button. 
Choose Add or Remove to configure MAC filtering rules. The following screen will 
appear when you click Add. Create a filter to identify the MAC layer frames by 
specifying at least one condition below. If multiple conditions are specified, all of 
them must be met. Click Save/Apply to save and activate the filter rule. 
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Consult the table below for detailed field descriptions. 
Field  Description 
Protocol Type  PPPoE, IPv4, IPv6, AppleTalk, IPX, NetBEUI, IGMP 
Destination MAC Address
Defines the destination MAC address 
Source MAC Address  Defines the source MAC address 
Frame Direction  Select the incoming/outgoing packet interface 
WAN Interfaces  Applies the filter to the selected bridge interface. 
5.7 Parental Control 
This selection provides WAN access control functionality. 
5.7.1 Time Restriction 
This feature restricts access from a LAN device to an outside network through the 
device on selected days at certain times. Make sure to activate the Internet Time 
server synchronization as described in 8.5 Internet Time, so that the scheduled 
times match your local time. 
Click Add to display the following screen. 
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See below for field descriptions. Click Apply/Save to add a time restriction. 
User Name: A user-defined label for this restriction. 
Browser's MAC Address: MAC address of the PC running the browser. 
Other MAC Address: MAC address of another LAN device.  
Days of the Week: The days the restrictions apply. 
Start Blocking Time: The time the restrictions start. 
End Blocking Time: The time the restrictions end. 
5.7.2 URL Filter 
This screen allows for the creation of a filter rule for access rights to websites based 
on their URL address and port number. 
Click Add to display the following screen. 
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Enter the URL address and port number then click Save/Apply to add the entry to 
the URL filter.  URL Addresses begin with “www”, as shown in this example.  
A maximum of 100 entries can be added to the URL Filter list.  
Tick the Exclude radio button to deny access to the websites listed. 
Tick the Include radio button to restrict access to only those listed websites. 
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5.8 Quality of Service (QoS) 
NOTE: QoS must be enabled in at least one PVC to display this option. 
 (see Appendix G - Connection Setup for detailed PVC setup instructions).
5.8.1 Queue Management Configuration 
To Enable QoS tick the checkbox þ and select a Default DSCP Mark.  
Click Apply/Save to activate QoS. 
QoS and DSCP Mark are defined as follows: 
Quality of Service (QoS): This provides different priority to different users or data 
flows, or guarantees a certain level of performance to a data flow in accordance with 
requests from Queue Prioritization. 
Default Differentiated Services Code Point (DSCP) Mark: This specifies the 
per hop behavior for a given flow of packets in the Internet Protocol (IP) header that 
do not match any other QoS rule. 
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5.8.2 Queue Configuration 
This function follows the Differentiated Services rule of IP QoS. You can create a new 
Queue entry by clicking the Add button. Enable and assign an interface and 
precedence on the next screen. Click Save/Reboot on this screen to activate it. 
Click Enable to activate the QoS Queue. Click Add to display the following screen. 
Name: Identifier for this Queue entry. 
Enable: Enable/Disable the Queue entry. 
Interface: Assign the entry to a specific network interface (QoS enabled). 
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5.8.3 QoS Classification 
The network traffic classes are listed in the following table. 
Click Add to configure a network traffic class rule and Enable to activate it. To 
delete an entry from the list, click Remove. 
This screen creates a traffic class rule to classify the upstream traffic, assign 
queuing priority and optionally overwrite the IP header DSCP byte. A rule consists of 
a class name and at least one logical condition. All the conditions specified in the 
rule must be satisfied for it to take effect.  
Please see table below for reference. 
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Field  Description 
Traffic Class Name  Enter a name for the traffic class. 
Rule Order  Last is the only option. 
Rule Status  Disable or enable the rule. 
Classification Criteria 
Class Interface Select an interface (i.e. Local, eth0-4, wl0) 
Ether Type  Set the Ethernet type (e.g. IP, ARP, IPv6). 
Source MAC Address  A packet belongs to SET-1, if a binary-AND of its source 
MAC address with the Source MAC Mask is equal to the 
binary-AND of the Source MAC Mask and this field. 
Source MAC Mask  This is the mask used to decide how many bits are checked 
in Source MAC Address. 
Destination MAC 
Address  A packet belongs to SET-1 then the result that the 
Destination MAC Address of its header binary-AND to the 
Destination MAC Mask must equal to the result that this 
field binary-AND to the Destination MAC Mask. 
Destination MAC Mask
This is the mask used to decide how many bits are checked 
in Destination MAC Address. 
Classification Results 
Assign Classification 
Queue  The queue configurations are presented in this format:  
“Interfacename&Prece P&Queue Q” where P and Q are the 
Precedence and Queue Key values for the corresponding 
Interface as listed on the Queue Config screen.  
Mark Differentiated 
Service Code Point   The selected Code Point gives the corresponding priority to 
packets that satisfy the rule. 
Mark 802.1p Priority  Select between 0-7. Lower values have higher priority. 
Tag VLAN ID  Enter a 802.1Q VLAN ID tag [2-4094] 
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5.9 Routing    
These following routing functions are accessed from this menu: 
Default Gateway, Static Route, Policy Routing, RIP and IPv6 Static Route. 
NOTE:  In bridge mode, the RIP menu option is hidden while the other menu 
options are shown but ineffective. 
5.9.1 Default Gateway 
Default gateway interface list can have multiple WAN interfaces served as system 
default gateways but only one will be used according to the priority with the first 
being the highest and the last one the lowest priority if the WAN interface is 
connected. Priority order can be changed by removing all and adding them back in 
again. 
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5.9.2 Static Route 
This option allows for the configuration of static routes by destination IP.  
Click Add to create a static route or click Remove to delete a static route. 
After clicking Add the following screen will display.  
Select the IP Version from the drop down menu. Input the Destination IP Address, 
select the interface and input the Gateway IP Address. Then click Apply/Save to 
add an entry to the routing table. 
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5.9.3 Policy Routing 
This option allows for the configuration of static routes by policy.  
Click Add to create a routing policy or Remove to delete one. 
On the following screen, complete the form and click Save/Apply to create a policy. 
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5.10 DNS 
5.10.1 DNS Server 
Select DNS Server Interface from available WAN interfaces OR enter static DNS 
server IP addresses for the system. In ATM mode, if only a single PVC with IPoA or 
static IPoE protocol is configured, Static DNS server IP addresses must be entered. 
Click Apply/Save to save the new configuration. 
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5.10.2 Dynamic DNS 
The Dynamic DNS service allows you to map a dynamic IP address to a static 
hostname in any of many domains, allowing the NEXUSLINK 3111u to be more 
easily accessed from various locations on the Internet. 
To add a dynamic DNS service, click Add. The following screen will display. 
Consult the table below for field descriptions. 
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Field  Description 
D-DNS provider  Select a dynamic DNS provider from the list 
Hostname  Enter the name of the dynamic DNS server 
Interface  Select the interface from the list 
Username  Enter the username of the dynamic DNS server 
Password  Enter the password of the dynamic DNS server 
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5.11 DSL 
The DSL Settings screen allows for the selection of DSL modulation modes.   
For optimum performance, the modes selected should match those of your ISP. 
DSL Mode  Data Transmission Rate - Mbps (Megabits per second) 
G.Dmt  Downstream: 12 Mbps   Upstream: 1.3 Mbps 
G.lite  Downstream:   4 Mbps  Upstream: 0.5 Mbps 
T1.413  Downstream:   8 Mbps  Upstream: 1.0 Mbps 
ADSL2   Downstream: 12 Mbps   Upstream: 1.0 Mbps 
AnnexL   Supports longer loops but with reduced transmission rates 
ADSL2+   Downstream: 24 Mbps   Upstream: 1.0 Mbps 
AnnexM   Downstream: 24 Mbps   Upstream: 3.5 Mbps 
MULTI-DSL  Downstream: 100 Mbps  Upstream: 60 Mbps 
Options  Description 
Inner/Outer Pair
Select the inner or outer pins of the twisted pair (RJ11 cable) 
Bitswap Enable  Enables adaptive handshaking functionality 
SRA Enable  Enables Seamless Rate Adaptation (SRA) 
Profile Selection  8a-d, 12a-b, 17a, 30a, US0 
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Advanced DSL Settings 
Click Advanced Settings to reveal additional options. On the following screen you 
can select a test mode or modify tones by clicking Tone Selection. Click Apply to 
implement these settings and return to the previous screen. 
On this screen you select the tones you want activated, then click Apply and Close. 
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5.14 DNS Proxy 
DNS proxy receives DNS queries and forwards DNS queries to the Internet. After the 
CPE gets answers from the DNS server, it replies to the LAN clients. Configure DNS 
proxy with the default setting, when the PC gets an IP via DHCP, the domain name, 
Home, will be added to PC’s DNS Suffix Search List, and the PC can access route with 
“Comtrend.Home”. 
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5.16 Interface Grouping 
Interface Grouping supports multiple ports to PVC and bridging groups. Each group 
performs as an independent network. To use this feature, you must create mapping 
groups with appropriate LAN and WAN interfaces using the Add button.  
The Remove button removes mapping groups, returning the ungrouped interfaces 
to the Default group. Only the default group has an IP interface. 
To add an Interface Group, click the Add button. The following screen will appear.  
It lists the available and grouped interfaces. Follow the instructions shown 
onscreen. 
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Automatically Add Clients With Following DHCP Vendor IDs: 
Add support to automatically map LAN interfaces to PVC's using DHCP vendor ID 
(option 60). The local DHCP server will decline and send the requests to a remote 
DHCP server by mapping the appropriate LAN interface. This will be turned on when 
Interface Grouping is enabled. 
For example, imagine there are 4 PVCs (0/33, 0/36, 0/37, 0/38). VPI/VCI=0/33 is 
for PPPoE while the other PVCs are for IP set-top box (video). The LAN interfaces are 
ENET1, ENET2, ENET3, and ENET4. 
The Interface Grouping configuration will be: 
1. Default: ENET1, ENET2, ENET3, and ENET4. 
2. Video: nas_0_36, nas_0_37, and nas_0_38. The DHCP vendor ID is "Video". 
If the onboard DHCP server is running on "Default" and the remote DHCP server is 
running on PVC 0/36 (i.e. for set-top box use only). LAN side clients can get IP 
addresses from the CPE's DHCP server and access the Internet via PPPoE (0/33). 
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If a set-top box is connected to ENET1 and sends a DHCP request with vendor ID 
"Video", the local DHCP server will forward this request to the remote DHCP server. 
The Interface Grouping configuration will automatically change to the following: 
1. Default: ENET2, ENET3, and ENET4. 
2. Video: nas_0_36, nas_0_37, nas_0_38, and ENET1. 
5.17 IP Sec 
You can add, edit or remove IPSec tunnel mode connections from this page. 
Click Add New Connection to add a new IPSec termination rule. 
The following screen will display. 
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IPSec Connection Name  User-defined label 
Remote IPSec Gateway Address  The location of the Remote IPSec Gateway. IP
address or domain name can be used. 
Tunnel access from local IP 
addresses  Specify the acceptable host IP on the local 
side.  Choose Single or Subnet. 
IP Address/Subnet Mask for VPN If you chose Single, please enter the host IP 
address for VPN. If you chose Subnet
, please 
enter the subnet information for VPN.   
Tunnel access from remote IP 
addresses  Specify the acceptable host IP on the remote 
side. Choose Single or Subnet. 
IP Address/Subnet Mask for VPN If you chose Single, please enter the host IP 
address for VPN. If you chose Subnet
, please 
enter the subnet information for VPN.   
Key Exchange Method  Select from Auto(IKE) or Manual 
For the Auto(IKE) key exchange method, select Pre-shared key or Certificate (X.509) 
authentication.  For Pre-shared key authentication you must enter a key, while for 
Certificate (X.509) authentication you must select a certificate from the list.   
See the tables below for a summary of all available options. 
Auto(IKE) Key Exchange Method 
Pre-Shared Key / Certificate (X.509)
Input Pre-shared key / Choose Certificate 
Perfect Forward Secrecy  Enable or Disable  
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Advanced IKE Settings  Select Show Advanced Settings to reveal 
the advanced settings options shown below. 
Advanced IKE Settings  Select Hide Advanced Settings to hide the 
advanced settings options shown above.  
Phase 1 / Phase 2  Choose settings for each phase, the available 
options are separated with a “/” character.  
Mode  Main / Aggressive 
Encryption Algorithm  DES / 3DES / AES 128,192,256 
Integrity Algorithm  MD5 / SHA1 
Select Diffie-Hellman Group  768 – 8192 bit 
Key Life Time  Enter your own or use the default (1 hour) 
The Manual key exchange method options are summarized in the table below. 
Manual Key Exchange Method 
Encryption Algorithm  DES / 3DES / AES (aes-cbc) 
Encryption Key  DES: 16 digit Hex, 3DES: 48 digit Hex 
Authentication Algorithm  MD5 / SHA1 
Authentication Key  MD5: 32 digit Hex, SHA1: 40 digit Hex 
SPI (default is 101)  Enter a Hex value from 100-FFFFFFFF 
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5.18 Certificate 
A certificate is a public key, attached with its owner’s information (company name, 
server name, personal real name, contact e-mail, postal address, etc) and digital 
signatures.  There will be one or more digital signatures attached to the certificate, 
indicating that these entities have verified that this certificate is valid. 
5.18.1 Local 
CREATE CERTIFICATE REQUEST 
Click Create Certificate Request to generate a certificate-signing request.  
The certificate-signing request can be submitted to the vendor/ISP/ITSP to apply for 
a certificate.  Some information must be included in the certificate-signing request.  
Your vendor/ISP/ITSP will ask you to provide the information they require and to 
provide the information in the format they regulate. Enter the required information 
and click Apply to generate a private key and a certificate-signing request.   
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The following table is provided for your reference. 
Field  Description 
Certificate Name  A user-defined name for the certificate. 
Common Name  Usually, the fully qualified domain name for the machine
.  
Organization Name  The exact legal name of your organization.  
Do not abbreviate. 
State/Province Name  The state or province where your organization is located
.  
It cannot be abbreviated. 
Country/Region Name  The two-letter ISO abbreviation for your country. 
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IMPORT CERTIFICATE 
Click Import Certificate to paste the certificate content and the private key 
provided by your vendor/ISP/ITSP into the corresponding boxes shown below. 
Input a certificate name and click Apply to import the local certificate. 
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5.18.2 Trusted CA 
CA is an abbreviation for Certificate Authority, which is a part of the X.509 system.  
It is itself a certificate, attached with the owner information of this certificate 
authority; but its purpose is not encryption/decryption.  Its purpose is to sign and 
issue certificates, in order to prove that these certificates are valid. 
Click Import Certificate to paste the certificate content of your trusted CA.  The 
CA certificate content will be provided by your vendor/ISP/ITSP and is used to 
authenticate the Auto-Configuration Server (ACS) that the CPE will connect to. 
Input a certificate name and click Apply to import the CA certificate. 
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Chapter 6 Wireless 
The Wireless menu provides access to the wireless options discussed below. 
6.1 Basic 
The Basic option allows you to configure basic features of the wireless LAN interface. 
Among other things, you can enable or disable the wireless LAN interface, hide the 
network from active scans, set the wireless network name (also known as SSID) 
and restrict the channel set based on country requirements. 
Click Save/Apply to apply the selected wireless options. 
Consult the table below for descriptions of these options. 
Option  Description 
Enable 
Wireless  A checkbox þ that enables or disables the wireless LAN interface.  
When selected, a set of basic wireless options will appear. 
Hide Access 
Point  Select Hide Access Point to protect the access point from detection 
by wireless active scans. To check AP status in Windows XP, open 
Network Connections from the start Menu and select View 
Available Network Connections. If the access point is hidden, it 
will not be listed there. To connect a client to a hidden access point, 
the station must add the access point manually to its wireless 
configuration.   
Clients 
Isolation  When enabled, it prevents client PCs from seeing one another in My 
Network Places or Network Neighborhood. Also, prevents one 
wireless client communicating with another wireless client. 
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Option  Description 
Disable WMM 
Advertise    
Stops the router from ‘advertising’ its Wireless Multimedia (WMM) 
functionality, which provides basic quality of service for 
time-sensitive applications (e.g. VoIP, Video). 
Enable 
Wireless 
Multicast 
Forwarding 
Select the checkbox þ to enable this function. 
SSID 
[1-32 
characters] 
Sets the wireless network name. SSID stands for Service Set 
Identifier. All stations must be configured with the correct SSID to 
access the WLAN. If the SSID does not match, that user will not be 
granted access.   
BSSID  The BSSID is a 48-bit identity used to identify a particular BSS 
(Basic Service Set) within an area.  In Infrastructure BSS 
networks, the BSSID is the MAC (Media Access Control) address of 
the AP (Access Point); and in Independent BSS or ad hoc networks, 
the BSSID is generated randomly. 
Country  A drop-down menu that permits worldwide and specific national 
settings.  Local regulations limit channel range:  
US= worldwide, Japan=1-14, Jordan= 10-13, Israel= 1-13 
Max Clients  The maximum number of clients that can access the router. 
Wireless - 
Guest / 
Virtual 
Access Points
This router supports multiple SSIDs called Guest SSIDs or Virtual 
Access Points. To enable one or more Guest SSIDs select the 
checkboxes þ in the Enabled column. To hide a Guest SSID, select 
its checkbox þ in the Hidden column.   
Do the same for Isolate Clients and Disable WMM Advertise.  
For a description of these two functions, see the previous entries for 
“Clients Isolation” and “Disable WMM Advertise”. Similarly, for 
Enable WMF, Max Clients and BSSID, consult the matching 
entries in this table. 
NOTE: Remote wireless hosts cannot scan Guest SSIDs. 
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6.2 Security 
The following screen appears when Wireless Security is selected. The options shown 
here allow you to configure security features of the wireless LAN interface. 
Click Save/Apply to implement new configuration settings. 
WIRELESS SECURITY 
Wireless security settings can be configured according to Wi-Fi Protected Setup 
(WPS) or Manual Setup. The WPS method configures security settings automatically 
(see 6.2.1 WPS) while the Manual Setup method requires that the user configure 
these settings using the Web User Interface (see the table below). 
Select SSID 
Select the wireless network name from the drop-
down box. SSID stands for Service 
Set Identifier.  All stations must be configured with the correct SSID to access the 
WLAN. If the SSID does not match, that client will not be granted access. 
Network Authentication 
This option specifies whether a network key is used for authentication to the 
wireless network.  If network authentication is set to Open, then no authentication 
is provided.  Despite this, the identity of the client is still verified.   
Each authentication type has its own settings.  For example, selecting 802.1X 
authentication will reveal the RADIUS Server IP address, Port and Key fields.  WEP 
Encryption will also be enabled as shown below. 
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WEP Encryption 
This option specifies whether data sent over the network is encrypted. The same 
network key is used for data encryption and network authentication. Fo
ur network 
keys can be defined although only one can be used at any one time. Use the Current 
Network Key list box to select the appropriate network key.  
Security options include authentication and encryption services based on the wired 
equivalent privacy (WEP) algorithm.  WEP is a set of security services used to 
protect 802.11 networks from unauthorized access, such as eavesdropping; in this 
case, the capture of wireless network traffic.  When data encryption is enabled, 
secret shared encryption keys ar
e generated and used by the source station and the 
destination station to alter frame bits, thus avoiding disclosure to eavesdroppers.
Under shared key authentication, each wireless station is assumed to have received 
a secret shared key over a secure channel that is independent from the 802.11 
wireless network communications channel. 
Encryption Strength 
This drop-down list box will display when WEP Encryption is enabled.  The key 
strength is proportional to the number of binary bits comprising the key.  This 
means that keys with a greater number of bits have a greater degree of security and 
are considerably more difficult to crack.  Encryption strength can be set to either 
64-bit or 128-bit.  A 64-bit key is equivalent to 5 ASCII characters or 10 
hexadecimal numbers.  A 128-bit key contains 13 ASCII characters or 26 
hexadecimal numbers.  Each key contains a 24-bit header (an initiation vector) 
which enables parallel decoding of multiple streams of encrypted data. 
6.2.1 WPS 
Wi-Fi Protected Setup (WPS) is an industry standard that simplifies wireless security 
setup for certified network devices. Every WPS certified device has both a PIN 
number and a push button, located on the device or accessed through device 
software. The NEXUSLINK 3111u has both a WPS button on the device and a virtual 
button accessible from the web user interface (WUI). 
Devices with the WPS logo (shown here) 
support WPS. If the WPS logo is not present 
on your device it still may support WPS, in 
this case, check the device documentation 
for the phrase “Wi-Fi Protected Setup”. 
NOTE: WPS is only available in Open, WPA-PSK, WPA2-PSK and Mixed 
WPA2/WPA-PSK network authentication modes.  Other authentication 
modes do not use WPS so they must be configured manually. 
To configure security settings with WPS, follow the procedures below. You must 
choose either the Push-Button or PIN configuration method for Steps 6 and 7. 
I. Setup 
Step 1: Enable WPS by selecting Enabled from the drop down list box shown. 
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Step 2: Set the WSC AP Mode. Configured is used when the NEXUSLINK 3111u 
will assign security settings to clients. Unconfigured is used when an 
external client assigns security settings to the NEXUSLINK 3111u. 
NOTES:  Your client may or may not have the ability to provide security settings to 
the NEXUSLINK 3111u. If it does not, then you must set the WSC AP 
mode to Configured. Consult the device documentation to check its 
capabilities. 
 In addition, using Windows Vista, you can add an external registrar using 
the StartAddER button (Appendix E - WSC External Registrar has 
detailed instructions). 
II. NETWORK AUTHENTICATION 
Step 3: Select Open, WPA-PSK, WPA2-PSK, or Mixed WPA2/WPA-PSK network 
authentication mode from the Manual Setup AP section of the Wireless 
Security screen. The example below shows WPA2-PSK mode. 
Step 4: For the Pre-Shared Key (PSK) modes, enter a WPA Pre-Shared Key.  You 
will see the following dialog box if the Key is too short or too long. 
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Step 5:  Click the Save/Apply button at the bottom of the screen. 
IIIa.  PUSH-BUTTON CONFIGURATION 
The WPS push-button configuration provides a semi-automated configuration 
method.  The WPS button on the rear panel of the router can be used for this 
purpose or the Web User Interface (WUI) can be used exclusively.   
The WPS push-button configuration is described in the procedure below.  It is 
assumed that the Wireless function is Enabled and that the router is configured as 
the Wireless Access Point (AP) of your WLAN.  In addition, the wireless client must 
also be configured correctly and turned on, with WPS function enabled. 
NOTE: The wireless AP on the router searches for 2 minutes.  If the router stops 
searching before you complete Step 7, return to Step 6. 
Step 6:  First method: WPS button 
 Press the WPS button on the rear panel of the router.  The WPS LED will 
blink to show that the router has begun searching for the client.  
 Second method: WUI virtual button  
 Select the Push-Button radio button in the WSC Setup section of the 
Wireless Security screen, as shown in A or B below, and then click the 
appropriate button based on the WSC AP mode selected in step 2. 
A - For Configured mode, click the Add Enrollee button. 
B - For Unconfigured mode, click the Config AP button. 
Step 7: Go to your WPS wireless client and activate the push-button function.   
 A typical WPS client screenshot is shown below as an example. 
Now go to Step 8 (part IV. Check Connection) to check the WPS connection. 
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IIIb.  WPS – PIN CONFIGURATION 
Using this method, security settings are configured with a personal identification 
number (PIN).  The PIN can be found on the device itself or within the software.  
The PIN may be generated randomly in the latter case.  To obtain a PIN number for 
your client, check the device documentation for specific instructions. 
The WPS PIN configuration is described in the procedure below.  It is assumed that 
the Wireless function is Enabled and that the router is configured as the Wireless 
Access Point (AP) of your wireless LAN.  In addition, the wireless client must also be 
configured correctly and turned on, with WPS function enabled. 
NOTE: Unlike the push-button method, the pin method has no set time limit.  
This means that the router will continue searching until it finds a client. 
Step 6:  Select the PIN radio button in the WSC Setup section of the Wireless 
Security screen, as shown in A or B below, and then click the appropriate 
button based on the WSC AP mode selected in step 2. 
 A - For Configured mode, enter the client PIN in the box provided and 
 then click the Add Enrollee button (see below). 
 B - For Unconfigured mode, click the Config AP button. 
Step 7: Activate the PIN function on the wireless client.  For Configured mode, 
the client must be configured as an Enrollee.  For Unconfigured mode, 
the client must be configured as the Registrar.  This is different from the 
External Registrar function provided in Windows Vista.    
The figure below provides an example of a WPS client PIN function in-progress. 
Now go to Step 8 (part IV. Check Connection) to check the WPS connection. 
IV. CHECK CONNECTION 
Step 8: If the WPS setup method was successful, you will be able access the 
wireless AP from the client.  The client software should show the status.  
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The example below shows that the connection established successfully. 
 You can also double-click the Wireless Network Connection icon from the 
Network Connections window (or the system tray) to confirm the status of 
the new connection. 
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