3Com SRWL306 Wireless LAN Access Point, WL-306 User Manual SpeedRacerAccessPoint

3Com Corporation Wireless LAN Access Point, WL-306 SpeedRacerAccessPoint

Users Manual Revised

Wireless LAN Access Point

User Guide

Model WL-306

Published May 2000

3Com Corporation

■

5400 Bayfront Plaza

■

Santa Clara, California

■

95052-8145

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UNITED STATES GOVERNMENT LEGEND

If you are a United States government agency, then this documentation and the software described herein are

provided to you subject to the following:

All technical data and computer software are commercial in nature and developed solely at private expense.

Software is delivered as “Commercial Computer Software” as deﬁned in DFARS 252.227-7014 (June 1995) or

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associated.

CONTENTS

VERVIEW

IGITAL

IRELESS

ETWORKING

Introduction 8

Wireless LAN Network Topologies 8

Peer-To-Peer Network 8

Same-Site Separate Networks 9

Single AP Bridge 10

Multiple-AP Full Coverage Network 11

Wireless LAN Access Point 11

AP features 12

PowerBASE-T 13

Radio Basics 13

Cellular Coverage 15

Site Topography 16

Theory of Operation 16

MAC Layer Bridging 16

DHCP Support 17

Media Types 18

Bridging Support 18

Direct-Sequence Spread Spectrum 20

Wireless Client Association Process 20

Mobile IP 21

Supporting CAM and PSP Stations 22

HTTP, HTML Web Server Support 23

Management Options 23

NSTALLING

CCESS

OINT

HARDWARE

Introduction 26

Precautions 26

Package Contents 26

Requirements 26

Network Connection 27

10BASE-T UTP 27

Single Cell 27

Power Options 27

Mounting the AP 28

Flat Surface 28

Wall Mount 28

Ceiling Mount 29

Using the PowerBASE-T 31

LED Indicators 32

Troubleshooting 32

Wired Network 32

Setting Up Wireless Clients 34

ONITORING

TATISTICS

Introduction 36

System Properties 36

Interface Statistics 36

Forwarding Counts 36

Ethernet Statistics 37

Radio Frequency Statistics 37

Miscellaneous Statistics 38

Analyzing Retries 38

Clearing Statistics 39

Known APs 39

ONFIGURING

THE

CCESS

OINT

Introduction 40

Gaining Access to the User Interface (UI) 40

Using a Web Browser 40

Changing UI Access 43

Installing the Access Point 44

Adding Additional Gateways 44

Conﬁguring the AP 45

Security 45

System Parameters 46

Radio Frequency Parameters 47

Conﬁguring the SNMP Agent 48

Conﬁguring PPP/Modem 49

Filtering 50

Updating AP Firmware 52

Special Functions 52

ONITORING

IRELESS

LIENTS

Introduction 54

Wireless Clients 54

Clearing Statistics 55

ONFIGURING

THE

AP U

SING

THE

ASCII I

NTERFACE

Introduction 56

Gaining Access to the User Interface (UI) 56

Using Telnet 56

Using a Direct Serial Connection 57

Using a Dial-Up Connection 57

Navigating the UI 57

Entering Admin Mode 58

Changing the Access to the UI 59

Conﬁguring for Dial-Up to the UI 59

Access Point Installation 61

Conﬁguring the AP 62

System Parameters 62

Radio Parameters 63

Conﬁguring PPP 65

Conﬁguring the SNMP Agent 67

Conﬁguring the ACL 68

Filtering 70

Clearing Wireless Clients from the AP 71

Setting Logging Options 72

Manually Updating AP Firmware 73

Update using TFTP 73

Updating using Xmodem 74

Auto Upgrade all APs Via Messaging 75

Performing Pings 76

Mobile IP Using MD5 Authentication 77

Enabling or Disabling Encryption 77

Encryption Conﬁguration Requirements 77

Saving, Resetting, and Restoring Conﬁgurations 77

Saving a Conﬁguration 77

Resetting an AP 78

Restoring the Default AP Conﬁguration 78

CCESS

OINT

PECIFICATIONS

PGRADING

AP F

IRMWARE

Wireless Clients 82

AP Software Upgrade Procedure 82

ECHNICAL

UPPORT

Online Technical Services 83

World Wide Web Site 83

3Com FTP Site 83

3Com Bulletin Board Service 84

3Com Facts Automated Fax Service 84

Support from Your Network Supplier 84

Support from 3Com 85

Returning Products for Repair 86

ARRANTY

AND

EGULATORY

OMPLIANCE

3Com Corporation Limited Warranty 87

Regulatory Compliance Information 89

3Com End User Software License Agreement 90

VERVIEW

IGITAL

IRELESS

ETWORKING

Introduction

The Wireless LAN from 3Com is made up of a series of products that work

together to deliver high-speed digital wireless networking. This technology

provides connectivity between wireless clients and network nodes in a variety of

indoor environments, and also provides bridging architecture between wired and

wireless network segments. Wireless LAN is based on the IEEE 802.11HR standard,

and delivers 11 Mbps data transfer rates.

The core hardware products that make up a Wireless LAN network include the

following:

■

Network Interface Card (NIC) installed in a wireless client, either a PC card

installed in a notebook or laptop computer, or a PCI card installed in a desktop

computer.

■

Access point, or AP, which serves as a wireless network node.

■

PowerBASE-T (optional), which provides bus power to the access point when

connected to an Ethernet network.

Also included in your Wireless LAN kit are an AP mounting bracket and hardware,

a serial cable, a power adapter and associated power cables, and two CDs: the

Wireless LAN Administrator CD, and the Wireless LAN User CD.

Wireless LAN Network

Topologies

To better understand how the various Wireless LAN products work together to

create a wireless network, it might be helpful to depict a few of the possible

Wireless LAN network topologies. The topology used in a particular environment

depends on many factors, such as the functionality of the AP in the network, or

desired data transfer rates. Your Wireless LAN network topology will probably

resemble one of the following scenarios, or perhaps a combination of two or

more.

Peer-To-Peer Network

The simplest Wireless LAN topology consists of one AP providing a single-cell

network for wireless clients. In this scenario, as shown in the ﬁgure below, the

wireless clients (laptop and desktop computers with the Wireless LAN NIC

installed) communicate through the AP on a peer-to-peer network. The clients can

be moved anywhere within the coverage area of the AP, and still communicate

with each other. The AP in this instance serves the same purpose as a stand-alone

network hub, and is not connected to any other network segments.

Wireless LAN Network Topologies

Same-Site Separate

Networks

In this scenario, as shown in the followng ﬁgure, Multiple APs can coexist as

separate networks at the same site without interference using different network

identiﬁers (wireless LAN service areas). The wireless clients can move within the

coverage area of one AP and remain connected, or can roam (if conﬁgured to do

so) to the coverage area of a different AP, and communicate with the wireless

clients associated with that AP.

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IRELESS

ETWORKING

Single AP Bridge

Another possible Wireless LAN topology is a single AP bridging an Ethernet and

wireless network. As shown in the next ﬁgure, the AP, wired to a network server

or LAN through an Ethernet cable, serves as a network node and provides the link

between the server and the wireless clients. The wireless clients can move freely

throughout the coverage area of the AP while remaining connected to the server.

Wireless LAN Access Point

Multiple-AP Full

Coverage Network

This network topology will be used in most enterprise environments: multiple APs

wired to an existing LAN to provide complete wireless network coverage. In this

scenario, as shown in the following ﬁgure, wireless clients can roam seamlessly

between different coverage areas and remain connected to the network.

Wireless LAN Access

Point

The Wireless LAN access point (AP) provides either a wireless peer-to-peer network

coverage area, or a bridge between Ethernet-wired LANs and Wireless LAN

networks. Essentially replacing the cabling of wired networks, the AP delivers

transparent connectivity between wireless clients, or between Ethernet networks

and wireless clients.

The AP provides an 11 Mbps data transfer rate, monitoring Ethernet trafﬁc and

forwarding appropriate Ethernet messages to wireless clients over the network. It

also monitors wireless client radio trafﬁc and forwards wireless client packets to

the Ethernet LAN.

The AP uses high data rate, direct sequence spread spectrum technology to

communicate with mobile and stationary units at distances of up to 300 feet,

providing high-capacity networking capability and the ﬂexibility of mobility to end

users.

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ETWORKING

A wireless client communicating with an AP appears on the network as a peer to

other network devices, rendering the wireless interface transparent. The AP

receives data from its wired interfaces and forwards the data to the proper

interface.

The AP has connections for wired networks, built-in antennas, and a power

supply. It attaches to a wall or ceiling, or can be placed on a ﬂat surface,

depending on installation-site requirements. The AP uses a diversity antenna for

radio transmission and reception, allowing the AP to automatically select the

strongest of the radio signals picked up by the antenna.

AP features

■

Built-in diagnostics (including a power-up self-check)

■

Wireless MAC interface

■

Upgradable ﬁrmware

■

10BASE-T Ethernet port interface with full-speed ﬁltering

■

Power supply IEC connector and a country-speciﬁc AC power cable

■

PC/AT Serial Port Interface

■

Built-in antenna diversity

■

Support for up to 63 wireless clients

■

SNMP support

■

IEEE 802.11 MIB support

■

DHCP support

■

HTTP Web server support.

Radio Basics

PowerBASE-T

This device allows the AP to be powered through the Ethernet cable connecting

the AP to a LAN. The PowerBASE-T should be used when the AP is connected to

LAN and is mounted in a location where access to a standard electric outlet is

severely limited.

For details concerning the installation of your PowerBase-T, see “Using the

PowerBASE-T”.

Radio Basics

Wireless LAN devices use radio signals to transmit and receive data without wires.

You can communicate with the network by establishing radio links between

wireless clients and APs.

Wireless LAN uses

Quadative Phase Shift layered modulation

(QPSK)

to transmit

digital data from one device to another. Using QPSK, a radio signal begins with a

carrier signal that provides the base or center frequency. The digital data signal is

superimposed on the carrier signal

in process called “modulation.” The radio

signal then travels through the air as electromagnetic waves. A receiving antenna

in the path of the waves absorbs them as electrical signals. The receiving device

“demodulates” the signal by removing the carrier signal. This demodulation

results in the original digital data.

Wireless LAN uses its environment (the air and certain other objects) as the

transmission medium. Wireless LAN radio devices transmit in the 2.4-2.5 GHz

frequency range, a license-free range throughout most of the world. The actual

range your Wireless LAN network operates at is country-dependent.

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ETWORKING

Wireless LAN devices, like other Ethernet devices, have unique, hardware-encoded

Media Access Control

(MAC), or IEEE, addresses. MAC addresses determine the

device sending or receiving data. A MAC address is a 48-bit number written as six

hexadecimal bytes separated by colons. A typical MAC address might be:

00:A0:F8:24:9A:C8

The AP MAC address is printed on the bottom of the unit, as shown below.

Radio Basics

Cellular Coverage

The AP establishes an average communication range with wireless clients called a

Home Service Area

(HSA),

or cell. When a wireless client is in a particular cell, the

wireless client associates and communicates with the AP in that cell. Each cell has

Home Service Area Identiﬁer

(HSA_ID). Under the 802.11 standard, the MAC

address of an AP represents its HSA_ID. The wireless client recognizes the AP it

associates with using the HSA_ID. Adding APs to a LAN establishes more cells in

an environment, creating a wireless network using the same NET_ID. This type of

network is called a

Wireless LAN Service Area

(WSA), as shown below.

APs with the same WLAN service area deﬁne a coverage area. The wireless client

searches for APs with a matching wireless LAN service area and synchronizes with

an AP to establish communications. This allows wireless clients within the

coverage area to roam between AP cells. As you roam from cell to cell, your

wireless client switches APs. The switch occurs when the wireless client analyzes

the reception quality at a particular location and selects an AP to communicate

with, based on such factors as signal strength and wireless client load.

When the wireless client begins to lose the signal as it moves away from an

associated AP, it performs a scan to ﬁnd another AP. As wireless clients switch APs,

the AP updates the

association table

. Roaming is invisible to the user.

Wireless LAN System Area

The network administrator assigns the wireless LAN system area for the APs in a

WSA. A valid wireless LAN system area is an alphanumeric, case-sensitive identiﬁer

of up to 32 characters. All nodes within one LAN use the same wireless LAN

system area to communicate on the LAN. Multiple wireless LANs can coexist in a

single environment by assigning different wireless LAN system areas for the

corresponding APs.

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ETWORKING

802.1d Spanning Tree Support

This protocol creates a

loop-free

topography with exactly one path between every

LAN. This is the shortest path from the Root AP to each AP and LAN. If an AP or

LAN fails, a new route is calculated and added to the tree. All packet forwarding

follows the spanning tree. APs have to choose one AP as the Root AP. The same

holds true for WLANs associating with the root AP or another AP connected to the

Ethernet LAN to prevent forming loops.

Site Topography

For optimal performance, place wireless clients and APs away from transformers,

heavy-duty motors, ﬂuorescent lights, microwave ovens, refrigerators and other

industrial equipment.

Signal loss can occur when metal, concrete, brick, walls or ﬂoors block

transmission. Locate antennas in open areas or add additional APs as needed to

improve coverage.

Site Surveys

A site survey analyzes the installation environment and provides users with

recommendations for the number and placement of APs. 3Com recommends that

a site survey be conducted at any new site prior to installing Wireless LAN

equipment.

To improve AP management and performance, users need to understand basic AP

functionality and conﬁguration options. The AP includes features for different

interface connections and network management.

The AP provides

MAC layer bridging

between its interfaces. The AP monitors

trafﬁc from its interfaces and, based on frame address, forwards the frames to the

proper destination. The AP tracks the frames sources and destinations to provide

intelligent bridging as wireless clients roam or network topologies change. The AP

also handles broadcast and multicast message initiations and responds to wireless

client association requests.

Theory of Operation

To improve AP management and performance, you should understand basic AP

functionality and conﬁguration options. The AP includes features for different

interface connections and network management.

The AP provides

MAC layer bridging

between its interfaces. The AP monitors

trafﬁc from its interfaces and, based on frame address, forwards the frames to the

proper destination. The AP tracks the frames sources and destinations to provide

intelligent bridging as wireless clients roam or network topologies change. The AP

also handles broadcast and multicast message initiations and responds to wireless

client association requests.

MAC Layer Bridging

The AP listens to all packets on all interfaces and builds an address database using

the unique IEEE 48-bit address (MAC address). An address in the database

includes the interface media that the device uses to associates with the AP. (The

AP internal stack interface handles all messages directed to the AP.) The AP uses

the database to forward packets from one interface to another. The bridge

forwards packets addressed to unknown systems to the default interface (either

Ethernet or PPP).

Theory of Operation

Each AP stores information on destinations and their interfaces to facilitate

forwarding

. When you send an

Address Resolution Protocol

(ARP) request packet,

the AP forwards the request over all enabled interfaces (Ethernet, PPP, or radio),

except over the interface on which the ARP request packet was received.

(Radio-received ARP request packets echo back to other APs over radio.) Upon

receiving the ARP response packet, the AP database keeps a record of the

destination address along with the receiving interface. With this information, the

AP forwards any directed packet to the correct destination. The AP forwards

packets for unknown destinations to the Ethernet interface.

The AP removes from its database destinations or interfaces not used for a

speciﬁed time. The AP refreshes its database when it transmits or receives data

from these destinations and interfaces.

Filtering and Access Control

The AP provides facilities to limit the wireless clients that associate with it and the

data packets that can forward through it. Filters provide network security or

improve performance by eliminating broadcast/multicast packets from the radio

network.

The

Access Control List

(ACL) contains MAC addresses for wireless clients allowed

to associate with the AP. This provides security by preventing unauthorized access.

The AP also uses a

disallowed address

list of destinations. This feature prevents the

AP from communicating with speciﬁed destinations. This can include network

devices that do not require communication with the AP or its wireless clients.

Depending on the setting, the AP can keep a list of frame types that it forwards or

discards. The Type Filtering option prevents speciﬁc frames (indicated by the 16-bit

DIX Ethernet Type ﬁeld) from being processed by the AP. These include certain

broadcast frames from devices unimportant to the wireless LAN but which utilize

bandwidth. Filtering out unnecessary frames also improve throughput.

DHCP Support The AP uses Dynamic Host Conﬁguration Protocol (DHCP) to obtain a leased IP

address and network conﬁguration information from a remote server. DHCP is

based on BOOTP protocol. DHCP can coexist or interoperate with BOOTP. An AP

sends out a DHCP request searching for a DHCP server to acquire the network

conﬁguration and ﬁrmware ﬁlenames. Because BOOTP and DHCP interoperate,

the one that responds ﬁrst becomes the server that allocates information. The

DHCP client automatically sends a DHCP request to renew the IP address lease as

long as the AP is running. (This parameter is programmed at the DHCP server. For

example, Windows NT servers typically are set for 3 days.)

The AP can optionally download two ﬁles when a boot takes place, the ﬁrmware

ﬁle and an HTML ﬁle, because ﬁrmware versions 4.00-31 and above support Web

servers. Users can program the DHCP or BOOTP server to transfer these two ﬁles

when a DHCP request is made.

When the AP receives a network conﬁguration change or is not able to renew the

IP address lease the AP sends out an SNMP trap.

18 CHAPTER 1: OVERVIEW OF DIGITAL WIRELESS NETWORKING

Media Types The AP supports bridging between Ethernet, radio, and serial media.

The Ethernet interface fully complies with Ethernet Rev. 2 and IEEE 802.3

speciﬁcations. The AP supports 10BASE-T wired connections and full-speed

ﬁltering. The data transfer rate over radio waves is 11 Mbps. The Ethernet

interface is optional for single-cell or PPP-connected networks.

The radio interface conforms to IEEE 802.11 HR speciﬁcations. The interface

operates at 11 Mbps using direct-sequence radio technology. The AP supports

multiple-cell operations with fast, transparent roaming between cells. With the

direct-sequence system, each cell operates independently. Each cell provides a 11

Mbps bandwidth. Adding cells to the network provides increased coverage area

and total system capacity. The AP supports wireless clients operating in Power Save

Polling (PSP) mode or Continuously Aware Mode (CAM) without user intervention.

The DB-9, 9-pin, RS-232 serial port provides a User Interface (UI) or a Point to Point

Protocol (PPP) connection. The UI provides basic management tools for the AP. The

PPP provides a link between APs using a serial connection. The serial link supports

short haul (direct serial) or long haul (telephone line) connections. The AP is a Data

Terminal Equipment (DTE) device with male pin connectors for the RS-232 port.

Connecting the AP to a PC requires a null-modem cable; connecting the AP to a

modem requires a straight-through cable.

Bridging Support The AP PPP interface, accessible from the serial port at the rear of the AP, provides

two types of bridging operations: Internet Protocol (IP) bridging between an AP

and a computer, and between two APs (with one AP connected to a LAN). To

establish an Internet Protocol bridge with an AP, ensure that the computer

includes the appropriate Telnet software with PPP and TCP/IP protocols. Using

Telnet, a remote computer can connect to any AP on an Ethernet network, as long

as data transfers through IP packets.

A PPP link provides the option of using a direct serial link or modem to extend

wired Ethernet topologies. Once in PPP mode, the AP automatically attempts to

communicate with the other device using the Data-Link Bridging (DLB) protocol.

An AP using DLB communicates on the MAC level, and receives and transmits

Ethernet frames.

If the other device does not support DLB, the AP attempts to communicate using

Internet Protocol Control Protocol (IPCP). An AP using IPCP communicates on the

IP level, and receives and transmits IP packets.

The PPP implementation in the AP uses the Link Control Protocol (LCP) and

Network Control Protocol (NCP) as described in:

■RFC 1171: the Point-to-Point Protocol, July 1990.

■RFC 1220: PPP Extensions for Bridging, April 1991.

■RFC 1332: The PPP Internet Protocol Control Protocol, May 1992.

■RFC 1661: The Point-to-Point Protocol, July 1994.

(RFCs are Requests For Comments used in Internet Communities.)

Theory of Operation 19

The AP database dynamically tracks wireless clients and APs on the PPP interface.

Packets forward to the PPP link after the AP determines their destination.

The PPP implementation in the AP uses the NCP as described in RFC 1220: PPP

Extensions for Bridging to encapsulate packets at the Ethernet level. The PPP

provides IP bridging control as deﬁned by RFC 1172 and MAC-level bridging. The

protocol provides support for PPP negotiations conforming to RFC 1661. Users

cannot plug a non-AP node directly into the AP serial port, only AP-to-AP PPP

links.

For detailed information, refer to RFC 1171: The Point to Point Protocol and RFC

1220: PPP Extensions for Bridging.

PPP Connection

Connecting an AP and a computer with a direct serial link requires the use of a

null-modem serial cable.

Connecting an AP and computer with modem devices requires the use of

straight-through cables between the APs and modems. Using modems requires a

telephone line for as long as the link remains active.

When using a modem connection, one AP represents the originating AP and the

other represents the answering AP. When using a PPP link, do not use the serial

port to access the UI. Access to the UI requires establishing a Telnet session with

the AP.

20 CHAPTER 1: OVERVIEW OF DIGITAL WIRELESS NETWORKING

Direct-Sequence Spread

Spectrum Direct Sequence Spread Spectrum (DSSS) uses a high-speed, non-information

bearing signal to spread the transmitted information over a segment of the radio

frequency band or spectrum. The Wireless LAN access point uses DSSS for radio

communication.

Direct-sequence systems communicate by continuously transmitting a redundant

pattern of bits called a chipping sequence. Each bit of transmitted data is mapped

into chips by the access point to ﬁnd the chipping sequence corresponding to the

output signal.

Wireless clients receiving a direct-sequence transmission use the same chipping

sequence to recreate the original data transmitted by the access point.

Intercepting and decoding a direct-sequence transmission requires a predeﬁned

algorithm to associate the chipping sequence used by the transmitting access

point to the receiving wireless client. This algorithm is established when the access

point and wireless client are conﬁgured. The bit redundancy within the chipping

sequence enables the receiving wireless client to recreate the original data pattern,

even if bits in the chipping sequence are corrupted by interference.

Wireless Client

Association Process APs recognize wireless clients as they associate with the AP. The AP keeps a list of

the wireless clients it services. Wireless clients associate with an AP based on the

following conditions:

■Signal strength between the AP and wireless client

■Wireless clients currently associated with the AP

■Wireless client Supported Rate (see table below).

■Positive match between the wireless client and encryption keys (optional)

■Positive wireless client authorization by the Access Control List (optional)

Wireless clients perform preemptive roaming by intermittently scanning for APs

and associating with the best available AP. Before roaming and associating with

APs, wireless clients perform scans to collect AP statistics and determine the

direct-sequence channel used by the AP.

Scanning is a periodic process where the wireless client sends out messages on all

frequencies deﬁned by the country code. The statistics enable a wireless client to

reassociate by synchronizing its frequency to the AP. The wireless client continues

communicating with that AP until it needs to switch cells or roam.

Wireless clients perform scans at start-up. In a scan, a wireless client uses a

sequential set of channels as the scan range. For each channel in range, the

wireless client tests for Clear Channel Assessment (CCA). When a

transmission-free channel becomes available, the wireless client broadcasts a

probe with the wireless LAN service area and the broadcast HSA_ID. An

AP-directed probe response generates a wireless client Acknowledgment (ACK)

Data Rate Requirement

11 Mbps Optional

5.5 Mbps Optional

2 Mbps Required

1 Mbps Required

Theory of Operation 21

and the addition of the AP to the AP table with a proximity classiﬁcation. An

unsuccessful AP packet transmission generates another wireless client probe on

the same channel. If the wireless client fails to receive a probe response within the

time limits, it repeats the probe process on the next channel in the sequence. This

process continues through all channels in the range.

A wireless client can roam within the coverage area by switching APs. Roaming is

transparent and virtually instantaneous in high-level applications. Roaming occurs

when:

■An unassociated wireless client attempts to associate or reassociate with an

available AP.

■The supported rate changes or the wireless client ﬁnds a better transmit rate

with another AP.

■The signal quality of a potential AP exceeds that of the current AP.

■The ratio of good-transmitted packets to attempted-transmitted packets falls

below a threshold.

■The wireless client detects an imbalance in the number of wireless clients

associated with available APs and roams to a less loaded AP.

A wireless client selects the best available AP and adjusts itself to the AP

direct-sequence channel to begin association. Once associated, the AP begins

forwarding any frames it receives addressed to the wireless client. Each frame

contains ﬁelds for the current direct-sequence channel. The wireless client uses

these ﬁelds to resynchronize to the AP.

Mobile IP The Internet Protocol identiﬁes the wireless client point of attachment to a

network through its IP address. The AP routes packets according to the location

information contained in the IP header. If the wireless client roams across routers

to another subnet, the following situations occur:

■The wireless client changes its point of attachment without changing its IP

address, causing forthcoming packets to become undeliverable.

■The wireless client changes its IP address when it moves to a new network,

causing it to lose connection.

Mobile IP enables a wireless client to communicate with other hosts using

only its home IP address after changing its point-of-attachment to the

internet/intranet.

Mobile IP is like giving an individual a local post ofﬁce forwarding address when

leaving home for an extended period. When mail arrives for the individual home

address, it is forwarded by the local post ofﬁce to the current care-of-address.

Using this method, only the local post ofﬁce requires notiﬁcation of the individual

current address. While this example represents the general concept of Mobile IP

operation and functionality, it does not represent the implementation of Mobile IP

used.

A tunnel is the path taken by the original packet encapsulated within the payload

portion of a second packet to some destination on the network.

22 CHAPTER 1: OVERVIEW OF DIGITAL WIRELESS NETWORKING

A Home Agent is an AP acting as a router on the wireless client home network.

The home agent intercepts packets sent to the wireless client home address and

tunnels the message to the wireless client at its current location. This happens as

long as the wireless client keeps its home agent informed of its current location on

some foreign link.

A Foreign Agent is an AP acting as a router at the wireless client location on a

foreign link. The foreign agent serves as the default router for packets sent out by

the wireless client connected on the same foreign link.

A care-of-address is the IP address used by the wireless client visiting a foreign link.

This address changes each time the wireless client moves to another foreign link. It

can also be viewed as an exit point of a tunnel between the wireless client home

agent and the wireless client itself.

The Wireless LAN Mobile IP (roaming across routers) feature enables a wireless

client on the Internet to move from one subnet to another while keeping its IP

address unchanged. To conﬁgure this feature, see “System Parameters” on

page 46.

The scanning and associating process continues for active wireless clients. This

allows the wireless clients to ﬁnd new APs and discard out-of-range or deactivated

APs. By testing the airwaves, the wireless clients can choose the best network

connection available.

Set the wireless client for Mobile IP as speciﬁed in the Wireless LAN Network

Interface User Guide.

Security

Security involves two distinct areas: authentication and privacy. Authentication

ensures that only authorized users access the wireless network. Privacy ensures

that communication between authenticated users and the network cannot be

intercepted or overheard. The Access Control List provides authentication using

the wireless LAN service area and a system administrator-supplied list of all the

wireless client MAC addresses authorized to access the Home Service Area. Privacy

is ensured by enabling the 40-bit WEP encryption option.

Supporting CAM and

PSP Stations Continuously Aware Mode (CAM) stations leave their radios on continuously to

hear every beacon and message transmitted. These systems operate without any

adjustments by the AP.

A beacon is a uniframe system packet broadcast by the AP to keep the network

synchronized. A beacon includes the wireless LAN service area, the AP address, the

Broadcast destination addresses, a time stamp, Delivery Trafﬁc Indicator Maps, and

the Trafﬁc Indicator Message (TIM).

Power Save Polling (PSP) stations power off their radios for long periods. When a

wireless client in PSP mode associates with an AP, it notiﬁes the AP of its activity

status. The AP responds by buffering packets received for the wireless client. The

PSP-mode wireless client wakes up to listen to the AP beacon every nth Beacon

Interval where n is a PSP-mode value from the 1 to 5-range; the Beacon Interval is

set on the wireless client. When the wireless client wakes up and sees its bit set in

the TIM, it issues a poll request to the AP for packets stored for it. The AP sends

Theory of Operation 23

them to the wireless client and the wireless client goes back to sleep. A DTIM ﬁeld,

also called a countdown ﬁeld, informs wireless clients of the next window for

listening to broadcast and multicast messages. The AP sends the messages

following the nth beacon where n is the DTIM interval deﬁned in the AP. When the

AP has buffered broadcast or multicast messages for associated wireless clients, it

sends the next DTIM with a DTIM Interval value. This value decreases by '1' with

each successive beacon. The AP sends broadcast and multicast messages

immediately following the beacon where the DTIM value is '0.' To prevent a

PSP-mode wireless client from sleeping through a DTIM notiﬁcation, select a PSP

mode value less than or equal to the DTIM value. PSP-mode wireless clients hear

the beacons and awaken to receive the broadcast and multicast messages.

A TIM is a compressed virtual bitmap identifying the AP associated wireless clients

in PSP mode that have buffered directed messages. wireless clients issue a poll

request when APs issue a TIM. A beacon with the broadcast-indicator bit set

causes the wireless client to note DTIM Count ﬁeld value. The value informs the

wireless client of the beacons remaining before next DTIM. This ensures the

wireless client turns on the receiver for the DTIM and the following BC/MC packet

transmissions.

HTTP, HTML Web Server

Support Hypertext Transfer Protocol (HTTP) is the native language of the World Wide Web.

The HTTP protocol makes requests from browsers to servers and responses from

servers to browsers. This function provides the user with a Web-based format for

conﬁguration and ﬁrmware download.

Web pages are written in Hypertext Markup Language (HTML). HTML allows the

user to create Web pages containing text, graphics, and pointers or links to other

Web pages or elsewhere on the page or document. Pointers are known as

Uniform Resource Locators (URLs). A URL is essentially the name of the Web page.

The URL consists of three parts:

1Protocol (or Scheme)

2Fully Qualiﬁed Domain Name (FQDN), the machine where the page is located

3Local name that identiﬁes the page (usually the HTML ﬁle name).

The HTML language describes how to format the document, indication which

fonts to use, much like a copy editor describes which fonts to use, such as the

location, color, header size and text.

Management Options Managing Wireless LAN includes viewing network statistics and setting

conﬁguration options. Statistics track the network activity of associated wireless

clients and data transfers on the AP interfaces. Conﬁguration involves, among

other things, setting system operating parameters and ﬁlters used in bridging.

The AP requires one of the following to perform a custom installation or maintain

the Wireless LAN network:

■Simple Network Management Protocol (SNMP).

■Wired or wireless LAN workstation with a telnet client.

■Terminal or PC with RS-232 connection and access to ANSI emulation.

24 CHAPTER 1: OVERVIEW OF DIGITAL WIRELESS NETWORKING

Changing one AP does not affect the conﬁguration of other APs on the network.

Make conﬁguration changes to APs individually. Each AP requires an individual IP

address.

Programmable SNMP Trap Support

The SNMP protocol deﬁnes the method for obtaining information about networks

operating characteristics and changing router and gateway parameters. The SNMP

protocol consists of three elements:

■Management stations

■Management information

■Management protocol (MIB)

Nodes can perform as hosts, routers, bridges or other devices that can

communicate status information. An SNMP Agent is a node that runs the SNMP

management process to systematically monitor and manage the network. The

management station performs network management by running application

management software.

An SNMP trap is an alert to all conﬁgured management stations of some

signiﬁcant event that occurred on the network. The management station queries

all stations for details of each speciﬁc event, including what, when and where the

event took place and the current status of the node or network. The format or

structure is deﬁned in the SNMP protocol. The MIB deﬁnes what and who

monitors the variables.

Using SNMP

The AP includes SNMP agent versions accessible through an SNMP manager

application (HP Open View or Cabletron Spectrum MIB browser). The SNMP agent

supports SNMP versions 1 and 2, MIB II, 802.11 MIB and one proprietary 3Com

Management Information Base (MIB). The SNMP agent supports read-write,

read-only or disabled modes. The AP supports traps that return to the SNMP

manager when certain events occur. The Wireless LAN Installation and Utilities disk

packaged with wireless clients contains the MIB.

Increased MIB Support

The MIB deﬁnes what the management station needs to understand and which

objects the station manages. The MIB has ten categories deﬁned with

approximately 175 variables.

Theory of Operation 25

Using the User Interface

The User Interface (UI) is a text-based maintenance tool integrated into the AP. It

provides statistical displays, AP conﬁguration options, and ﬁrmware upgrades.

Access to the UI requires one of the following

Method Description

Telnet Client Gain access to the AP built-in Telnet server from any AP interface

including remote Ethernet connections. See “Using Telnet” in

Appendix C.

Direct Serial

Connection Acts as a DTE device to connect directly to a DTE device with a

null-modem serial cable. The direct serial access method requires a

communication program with ANSI emulation. See “Using a Direct

Serial Connection” in Appendix C for more information.

Dial Up Access The dial-up access method requires a communication program

with ANSI emulation on the remote terminal or PC. The terminal

or PC dials to an AP with a modem connection. The AP supports

connection to a Hayes-compatible 28,800-baud or faster modem.

See “Using a Dial-up Connection” in Appendix C.

SNMP Via a MIB

Browser Gain access to the AP SNMP function via a MIB Browser.

Web Browser Gain access to the AP built-in Web server from any AP interface

including remote Ethernet connections.

2INSTALLING ACCESS POINT HARDWARE

Introduction To install an AP, you will have to connect the AP to your network, mount the AP in

a location best suited for reception, and provide power to the AP.

Precautions Before installing the AP, review the following guidelines and precautions.

■Ensure that you have performed the preinstallation procedure outlined in the

Access Point Quick Start Guide.

■Do not install the AP in wet or dusty areas without additional protection.

Contact a 3Com representative for more information.

■Verify the environment has a temperature range between

-20˚ C to 55˚ C.

■If you attach the AP to a wired Ethernet, make sure that the AP is on the same

subnet.

Package Contents The AP package contains the following items.

■1 Access Point (Check the AP model number on the bottom of the unit against

the model listed on the packaging.)

■1 Power adapter

■1 Mounting bracket and hardware

■1 PowerBASE-T module

■1 Null-modem serial cable

■2 power cords

Contact the 3Com Support Center to report missing or improperly functioning

items.

Requirements The minimum installation requirements for a single-cell, peer-to-peer network is a

power outlet. The AP supports a 10BASE-T unshielded twisted pair (UTP) Ethernet

cable.

Power Options 27

Network Connection Locate the Ethernet port and power plug on the back of the AP, as shown by items

2 (power plug) and 3 (Ethernet port) in the ﬁgure below. Item 1 is the serial port.

Ethernet conﬁgurations vary according to the environment. Determine the

Ethernet wiring to connect the AP, 10BASE-T UTP, or single cell.

10BASE-T UTP Use a 10BASE-T connection for multiple APs or an AP attached to a wired UTP

Ethernet hub. Normal 10BASE-T limitations apply.

1Plug the data cable with an RJ-45 connector into the AP Ethernet port.

2Plug the other end of the data cable into the LAN access port (possibly a hub or

wall connection).

3Add additional APs as needed.

Single Cell The single-cell connection option allows a single AP to connect wireless clients

without a wired network. Wireless clients appear as peers, as in any Ethernet

environment.

Power Options ■Standard power supply : 115/230VAC, 50/60Hz, 24V/14.

■US line cord Part Number: 23844-00-00

■Remote power distribution system, Part Number: AP-PS-11

■Refer to application note AP-PS-01 located on the 3Com Technologies web

page.

28 CHAPTER 2: INSTALLING ACCESS POINT HARDWARE

Mounting the AP The AP can be mounted in any number of locations, some of which are shown

below.

Flat Surface To mount an AP on a ﬂat surface, place the AP so that it rests on the four rubber

pads on its underside. The surface should be clear of debris and away from trafﬁc.

Wall Mount To mount an AP on a wall:

1Attach the mounting bracket to the AP by lining up the raised ﬂanges in the

center of the bracket with the mounting holes on the bottom of the AP.

2Firmly press the rounded ends of the ﬂanges into both mounting holes, and then

push forward until the ﬂanges slide into the holes and the bracket locks into place.

3Mount the AP, using two screws (not provided) inserted into the wall through the

holes on the outer ﬂanges of the mounting bracket.

Or:

1Using the mounting bracket (shown below) as a template, mark the location of

the two ﬂanged holes in the center of the bracket on the wall with a pen or pencil.

2Install two screws at the marks on the wall made in Step 1. Leave the heads of the

screws approximately 1/8” above the surface of the wall.

3Position the AP on the wall, and slide it down so that it hangs from the two screws

installed in Step 2.

Mounting the AP 29

Ceiling Mount To mount an AP on a ceiling:

1Attach the mounting bracket to the AP by lining up the raised ﬂanges in the

center of the bracket with the mounting holes on the bottom of the AP.

2Firmly press the rounded ends of the ﬂanges into both mounting holes, and then

push forward until the ﬂanges slide into the holes and the bracket locks into place.

3Attach both t-rail grips to the outer ﬂanges of the mounting bracket with the t-rail

wingnuts. Do not tighten the wingnuts completely; the t-rail grips should remain

loose.

4Align the t-rail grips with the ceiling t-rails, and attach them to the t-rails.

30 CHAPTER 2: INSTALLING ACCESS POINT HARDWARE

5Tighten the t-rail wingnuts.

The power adapter connects to the rear of the AP and to a power outlet.

1Plug the power adapter cable into the socket at the back of the AP.

2Plug the adapter into an outlet.

The AP is functional when the Status indicator on the front of the AP ﬂashes

consistently, and the Wireless LAN Activity indicator begins ﬂickering (see “LED

Indicators” for more details). This indicates that the AP is ready for wireless clients

to associate with it.

Using the PowerBASE-T 31

The AP operates without user intervention after setup. See the AP LED indicators

to verify that the unit operates properly.

Using the

PowerBASE-T The PowerBASE-T allows you to power the AP using the Ethernet cable. If you are

forced to mount the AP in an area where access to an electrical outlet is limited,

the PowerBASE-T can be used to power the AP.

The PowerBASE-T can be located at any point between the AP and the hub or

switch, where a convenient AC outlet exists. To connect the PowerBASE-T, use the

following procedure.

1Connect the power adapter cable to the power supply.

2Connect the power adapter cable from the power supply to the PowerBASE-T

module. See item 1 in the following ﬁgure.

3Connect the power cord to the power supply.

4Plug the power cord into a power outlet.

When the PowerBASE-T module receives power, the green LED on top lights up.

5Connect an Ethernet cable from the Ethernet port to your network hub or switch.

See item 2 in the following ﬁgure.

6Connect an 8-wire Category 5 Ethernet cable from the PowerBase-T module to

the access point. See item 3 in the following ﬁgure.

When it receives power over the Ethernet cable, the access point will start its boot

sequence and its LED will light up.

32 CHAPTER 2: INSTALLING ACCESS POINT HARDWARE

LED Indicators The top panel LED indicators provide a status display indicating transmission, error

condition, and other activity.

Troubleshooting Check the following symptoms and their possible causes before contacting the

3Com Support Center.

Wired Network Verify AP operation.

1If the AP does not power up, you may be experiencing one of the following:

■Faulty AP power supply

Symbol Description

Power ■On—Power being received by AP

■Off—No power to AP

■Flashing—AP boot sequence

LAN ■On—Link to hub detected, but no network traffic

■Off—No power and no network connection

■Flashing—LAN traffic detected. Faster flashing indicates heavier traffic.

WLAN ■On—No associated wireless clients

■Off—No power and no radio signal

■Flashing—Radio traffic detected. Faster flashing indicates heavier traffic.

Troubleshooting 33

■Failed AC supply

■Electrical Management System (EMS) operating outlet

2After the AP resets and hardware is initialized, it performs an SRAM test. If the test

passes, all three LEDs turn on. If the test fails, the LEDs all turn off and the AP

resets. The LEDs turn off sequentially, in the order shown, as each of the following

tests pass.

Identify wired network problems:

3No operation:

■Verify AP conﬁguration via Telnet, PPP or UI. Review procedures for Ethernet

and serial connection of the AP. Review AP ﬁrmware revisions and update

procedures.

■Verify network conﬁguration by ensuring that there are no duplicate IP

addresses. Power down the device in question and ping the assigned

address of the device. Ensure no other device responds to that address.

4AP powered on but has no connection to the wired network:

■Check connections for proper wiring.

5Verify network wiring and topology for proper conﬁguration:

■Check that the cables used have proper pinouts and connectors.

■Verify router conﬁguration and ﬁltration setting.

■Check that network band use does not exceed 37% of bandwidth.

■Verify wireless client operations.

■Conﬁrm AP operation.

■Conﬁrm AP and wireless client wireless LAN service area.

■Check that the radio driver loaded properly.

■Check that the wireless client PROTOCOL.INI or NET.CFG ﬁle is compatible

with the network operating system.

6Slow or erratic performance:

■Check wireless client and RF communications range.

■Check antenna, connectors and cabling.

■Verify the AP is using the primary antenna connection for single antenna

use.

LED State Test Passed

Power Blinks

continuously Bootup and run-time codes

downloaded to AP flash memory

successful. Run-time code controls the

AP.

Wireless LAN Activity Off Serial port initialized, FIFO buffer

flushed, serial port to AP connection

checked.

Wired LAN Activity Off LAN adapter present.

34 CHAPTER 2: INSTALLING ACCESS POINT HARDWARE

■Verify that antenna diversity setting for AP is appropriate. If using one

antenna, the setting is Primary Only, if using two antennas, the setting is

Primary and Secondary.

■Verify network trafﬁc does not exceed 37% of bandwidth.

■Check to see that the wired network does not exceed 10 broadcast

messages per second.

■Verify wired network topology and conﬁguration.

Setting Up Wireless

Clients Refer to documentation for installing drivers, client software and testing. Use the

default values for the WLAN service area and other conﬁguration parameters until

network connection veriﬁcation.

3MONITORING STATISTICS

Introduction The Wireless LAN AP keeps statistics of its transactions during operation. These

statistics include trafﬁc, transmission success, and the existence of other radio

network devices. This chapter discusses the statistics that can be monitored. All

statistics can be cleared as needed.

System Properties The System Properties window displays information about the conﬁguration of the

AP, status of AP modes, AP hardware identiﬁcation numbers, and ﬁrmware and

HTML versions.

To view System Properties, select Statistics→System Properties. To exit the System

Properties window, select any other item in the left-hand column, or click on

Access Point at the top of the navigation pane.

Interface Statistics The AP interface also monitors packets sent to the AP protocol stack (e.g.

conﬁguration requests, SNMP, Telnet). The Interface Statistics window provides the

following information on these packets:

■Packet forwarding statistics for each interface (Ethernet, PPP, RF)

■Performance information for each interface in packets per second (PPS) and

bytes per second (BPS).

To view Interface Statistics, select Statistics→Interface Statistics.

You can dynamically update this information by using the Refresh option. Click

Start Refresh at the bottom of the page to update the values approximately once

every two seconds. Click Stop Refresh at the bottom of the page to terminate

dynamic updates.

Select any other item or click Access Point at the top of the navigation pane to

exit.

Forwarding Counts Forwarding Counts provides information on packets transmitted from one

interface to another (Ethernet, PPP, radio, AP). Forwarding Counts also displays the

broadcast packets transmitted from the AP.

To view the Forwarding Counts window, select Statistics→Forwarding Counts.

You can dynamically update this information by using the Refresh option. Click

Start Refresh at the bottom of the page to update the values approximately once

every two seconds. Click Stop Refresh at the bottom of the page to terminate

dynamic updates.

Select any other item or click Access Point at the top of the navigation pane to

exit.

Ethernet Statistics 37

Ethernet Statistics The AP keeps Ethernet performance statistics, including packet transmission and

data retries, until it is reset.

To view or change Ethernet statistics, select Statistics→Ethernet Statistics.

You can dynamically update this information by using the Refresh option. Click

Start Refresh at the bottom of the page to update the values approximately once

every two seconds. Click Stop Refresh at the bottom of the page to terminate

dynamic updates.

Select any other item or click Access Point at the top of the navigation pane to

exit.

Radio Frequency

Statistics The AP keeps radio performance statistics, including packet and communication

information.

To view the Radio Frequency statistics, select Statistics→RF.

You can dynamically update this information by using the Refresh option. Click

Start Refresh at the bottom of the page to update the values approximately once

every two seconds. Click Stop Refresh at the bottom of the page to terminate

dynamic updates.

Select any other item or click Access Point at the top of the navigation pane to

escape from the Ethernet Statistics page.

Statistic Definition

Packets Seen Packets received on the Ethernet interface.

Packets Forwarded Packets forwarded from the Ethernet interface to other

interfaces.

■Discarded/No Match—Packets discarded because of

unknown destinations (destinations not in the known list

of database entries).

■Discarded/Forced—Packets discarded because of the

applied address filters.

■Discarded/Buffer—Packets discarded because of

insufficient buffers in AP.

■Discarded/CRC—Packets discarded because of data errors.

Broadcast/Multicast Total broadcast or multicast packets received.

Individual Address Packets received with designated individual addresses.

Packets Sent Total packets sent out.

Any Collision Packets affected by at least one collision.

1 + Collisions Packets affected by more than one collision.

Maximum Collisions Packets affected by the maximum number of collision.

Late Collisions Collisions occurring after the first 64 bytes.

Defers The number of times the AP had to defer transmit requests on

the Ethernet because of a busy medium.

38 CHAPTER 3: MONITORING STATISTICS

Miscellaneous

Statistics The AP keeps statistics on WNMP and SNMP packets, ﬁltering violations, and serial

port use in the Miscellaneous Statistics window. to display the Misc System

Statistics window, select Main Menu→Misc Statistics.

Select Refresh or press the F1 key to update the values manually. Select Timed or

press the F2 key to have the AP automatically update the display every two

seconds.

Press Esc or Previous-[F4] to exit.

Analyzing Retries The AP keeps statistics of packets with multiple retries. Use these statistics to

identify severe occurrences of retries. Retries occur when the transmitting station

fails to receive an acknowledgment for a transmitted packet. This lack of

acknowledgment can result from:

■Two or more stations transmitting simultaneously and causing collisions

■The receiving station moving out of range

■The receiving station being powered off.

Any one of these incidents causes both devices to suspend transmitting and retry

later. Too many retries can indicate a system problem.

To view retry severity, do the following:

1Select Statistics from the Main Menu.

2Select Retry Histogram. The display indicates the packets that experience retries

(up to 15 retries).

3Press any key to return to the Main Menu.

Type Name Definition

WNMP Echoes Echo requests received by the AP.

Pings Ping requests received by the AP.

Passthrough Echoes Echoes for wireless clients associated with

the AP.

SNMP Requests Configuration requests received from the

SNMP manager.

Traps AP messages sent to the SNMP manager.

Filter ACL Violations Attempts by wireless client(s) not in ACL list

to associate with this AP.

Address Packets discarded by address filter.

Type Packets discarded by type filter.

Modem Number of Dialouts Dial-out attempts by the AP.

Dialout Failures Dial-out failures by the AP.

Number of Answers Answer attempts by the AP.

Current Call Time Current connection session length, in

seconds.

Last Call Time Last connection session length, in seconds.

Clearing Statistics 39

Clearing Statistics To clear statistics, do the following:

1Select Conﬁguration from the Main Menu.

2Select Clear All Statistics.

3Select Perform Function. The AP zeroes out all statistics. Resetting the AP also

clears statistics.

Known APs The AP displays a list of the known APs derived from AP-to-AP communication.

The list includes the MAC and IP addresses and conﬁguration information for each

AP. The ﬁrst AP on the list provides the information. The AP recognizes other APs

listed in subsequent lines. It sends a broadcast message to other APs every 12

seconds to establish communication and refresh this list.

Select Show Known APs from the Main Menu to display the Known Access Points

window and to review information about the APs.

Category Description

MAC Address Unique 48-bit, hard-coded Media Access Control address,

known as the station identifier.

IP Address Network-assigned Internet Protocol address. An “x” appearing

after the IP address indicates the AP on this line is not using

the 802.11 protocol, and its firmware must be upgraded.

DS Channel (CH) Direct-sequence channel used by the AP.

WCS Wireless clients associated with the AP.

KBIOS The data traffic handled by the AP, measured by kilobytes in

per second and kilobytes out per second

FW_Ver Firmware version used by the specified AP

Away Determines whether the AP functions as a part of the network

or is “Away.” Away indicates the last known transmission

took place 12 or more seconds ago.

4CONFIGURING THE ACCESS POINT

Introduction Software conﬁguration requires setting up a connection to the Access Point (AP)

and gaining access to the User Interface (UI).

Gaining Access to the

User Interface (UI) In order to conﬁgure an AP, you need access to the Web and you need to know

the IP address of the AP. In the address/URL text box of your browser, type IP

address of the AP and press Enter.

Using a Web Browser Using a Web browser to gain access to the UI requires the workstation to have a

TCP/IP stack and access to a Web browser. The remote station can be on either the

wired or wireless LAN. There are two methods for setting up the Web Help ﬁle:

1Placing the Help ﬁle on the network Web server

2Placing the Help ﬁle on the local workstation hard disk.

To use this feature, the Web browser (Internet Explorer 4.0 or greater, or Netscape)

requires JavaScript.

Help File Access

A network Web server is required to access the Help ﬁle from the Wireless LAN

Access Point Conﬁguration Management System Web pages. This procedure is

intended for Microsoft Internet Information Server. The network Web server can

be different. If this is the case, some of the procedures will differ.

Setup Network Web Server Help File Access To create the Help ﬁle on a

network Web server, a network or system administrator uses the procedure below.

(NT4 is used in this example.)

1Create a directory on the network Web server in which the AP Web Site Help Files

will reside. Often this is a subdirectory to C:\InetPub\wwwRoot.

2Copy all .gif and .htm ﬁles to the directory or folder.

3Select Start from the Windows Task Bar.

4Select Programs→Microsoft Internet Server (common) →Internet Service Manager.

5Make sure the server WWW service is running.

6Select Properties→Service Properties to display the WWW service properties for

the server. The WWW Service Properties window opens.

7Select the Directories tab.

NOTE: Before conﬁguring the AP, you may wish to upgrade the Wireless LAN

ﬁrmware to the latest version. Refer to “Updating AP Firmware” on page 52.

Gaining Access to the User Interface (UI) 41

8Click Add to open the Directories dialog box.

9Type the complete path to the directory created in step one.

10 Select Virtual Directory.

11 Type the folder alias (i.e., Wireless LAN Help).

12 Click OK.

13 Enable the Default document option.

14 Type WirelessLANHelp.htm as the default document and click Apply.

15 Click OK to exit the window.

Setup Local Workstation Help File Access To access the Help ﬁle from a local

workstation, users need to load the Help ﬁle on the hard disk. To install the Help

ﬁle, run the InstallShield program.

1Select Wireless LAN Firmware & Software Downloads from the disk or 3Com Web

site at http://support.3com.com.

2Find and click the APHTMLHelp_Install32_102.exe ﬁle. The Unpacking WAP HTML

Help window displays indicating that the ﬁle is decompressing and the installation

wizard is about to run. The WAP HTML Help Installation Setup dialog box displays.

3Follow the on-screen instructions to install the Help ﬁle on the local workstation

hard disk.

To access the Help ﬁle located on the local workstation, follow the procedure

below.

1Click Start from the Windows Task bar.

2Select Programs→3Com (or the directory name created during the installation

process).

3Click WAP HTML Help to launch the help ﬁle program.

To exit the Help ﬁle, do the following.

1Click File from the Windows menu bar.

2Select Close/Exit.

Accessing the Web Browser UI

Using a Web browser to gain access to the UI requires that the workstation have a

TCP/IP stack and access to a Web browser. The remote station can be on the wired

or wireless LAN.

To verify that the Web Server option is enabled for the AP, do the following:

1Access the UI using a Serial or Telnet connection.

2Select System Conﬁguration.

3Verify that the Web Server option on the System Conﬁguration dialog box is

enabled.

4Select Save-[F1] to save the conﬁguration.

42 CHAPTER 4: CONFIGURING THE ACCESS POINT

You must always reset the AP after you make conﬁguration changes if you want

the changes to be initiated. To reset the AP, follow the procedure below.

1Select Special Functions.

2Select Reset AP.

3Select Yes at the conﬁrmation prompt.

To enable Help ﬁle access, change the Help URL parameter using the following

procedure.

1Select Special Functions.

2Select Alter Filename(s)/HELP URL/TFTP Server/DHCP using Tab.

3Press ENTER.

4Select the .HELP URL ﬁeld using the Tab key.

5Type the IP address/URL (Universal Request Locator) of the Web server or the

directory/folder of the Web server for the Help ﬁle location.

6Press ENTER.

7Select OK-[CR] using the Tab key and press ENTER.

8Select the Save Conﬁguration option to save the new setting.

9Select Yes at the conﬁrmation prompt.

The Main Menu displays.

10 Reset the AP for changes to take effect.

To access the AP UI via a Web browser from a workstation, do the following:

1Set the IP address of the workstation and the subnet mask from the NCPA

properties window.

The workstation, in this case, is the workstation or laptop computer running the

Web browser. The informational message instructs you to reboot the system for

property changes to take effect.

2Ping the AP to verify the connection by typing the command below at the default

DOS prompt:

Ping -t xxx.xxx.xxx.xxx

If the ping receives no response, verify that the hardware connections, IP address,

gateway address, and subnet mask are correct. If these items are correct, contact

your network administrator for assistance.

3Start your Web browser (Internet Explorer 4.0 or greater, or Netscape 3.0 or

greater).

4Type the IP Address for the associated AP to access that AP via the Web browser.

The Wireless LAN Access Point Conﬁguration Management System main page

displays.

(The Web pages look different than the Telnet, Direct Serial, or Dial-Up

Connections. Access the different page types using the nodes located in the left

Gaining Access to the User Interface (UI) 43

frame. Refer to the online help ﬁle for Web page navigation, page contents, and

parameter use.)

5Turn off the caching function for the browser to view conﬁguration, function, or

option changes on the Web page(s).

■For Netscape

aSelect Edit→Preferences from the menu bar.

bSelect Advanced→Cache when the Preferences dialog box opens.

cSelect Every time under the Document in cache is compared to document on

network item.

■For Internet Explorer

aSelect View→Internet Options from the menu bar.

bSelect Temporary Internet ﬁles and Settings.

cSelect Every visit to the page under the Check for newer versions of stored

pages item.

You must set this option so that the latest version of a Web page is displayed.

You can access help from any Wireless LAN Access Point Conﬁguration

Management System Web page. To do so, select Help from the top right-hand

corner of any page.

You can change the caching options in the Easy Setup and Conﬁguration pages.

To access the Easy Setup and Conﬁguration pages, follow the procedure below.

1Select Easy Setup and Conﬁguration. The Username and Password Required dialog

box displays.

2Type the (case sensitive) AP name.

3Com Access Point

3Type the (case sensitive) password:

3Com

4Exit the browser to manually terminate the session.

Changing UI Access To change the System Password, do the following:

1Select Conﬁguration→Security from the navigation pane.

2Select System Password.

3Type the new password and press Enter.

4Select Save Settings to conﬁrm the save.

44 CHAPTER 4: CONFIGURING THE ACCESS POINT

Installing the Access

Point AP Easy Setup in which you set basic parameters for a Wireless LAN network.

These parameters include designating a gateway address that enables message

forwarding across routers on the wired Ethernet.

To install an AP, follow the procedure below.

1Select Easy Setup→Easy Setup.

The parameters in the Access Point Easy Setup window are explained in the list

below.

2Verify that the AP parameters reﬂect the network environment and change the

parameters as needed.

3Do one of the following:

■Click Save Settings to write changes if you make modiﬁcations.

■Click Clear Entries to remove your changes and return the default settings.

Adding Additional

Gateways You can add the IP addresses of additional gateways during Easy Setup. To do so,

follow this procedure:

1Select Easy Setup→Easy Setup.

2Click Add/Delete Gateways.

The Easy Setup - Add/Delete Gateways page displays.

3Enter the IP addresses of up to seven additional APs.

4Click Save Settings to write your changes.

5Click Clear Entries to remove your changes and return the default settings.

Parameter Description

Unit Name AP name

IP Address Network-assigned Internet Protocol address of the AP

Gateway IP Address IP address of a router the AP uses on the Ethernet

default gateway

Subnet Mask Consists of four sets of digits that help divide a

network into subnetworks and simplify routing and

data transmission

DHCP Enable/Disable automatic IP address assignment by a

DHCP server

Help URL URL of web management help file

Wireless LAN Service

Area WLAN service area identifier

Diversity Enables selection of antenna diversity. Choose

Primary Only

Additional Gateways IP addresses of the additional gateways used. You can

access up to eight gateways

Configuring the AP 45

Conﬁguring the AP The AP has many conﬁguration parameters. This section discusses all the AP

parameters and how to set them.

Security One of the ﬁrst tasks you need to accomplish is to set AP security. By doing so, you

deﬁne the system password, enable you Access Control List (ACL), determine

which wireless clients have access to an AP and which do not, and enable or

disable encryption.

1Select Conﬁguration→Security.

The Security Setup page displays.

2Review the default settings and change as appropriate.

3Do one of the following:

■Click Save Settings to write your changes.

■Click Clear Entries to remove your changes and return the default settings.

Adding Allowed Wireless Clients

1Select Conﬁguration→Security.

2Select Enabled for Access Control.

3Click View/Add/Delete next to Allowed Wireless Clients.

The Access Control List - Add/Delete Allowed Wireless Clients page displays.

4Enter the MAC address of a wireless client that can associate with the AP and click

Add Wireless Client.

5Click Clear Entry if you decide not to allow the wireless client association with the

AP.

6Repeat step 4 for as many wireless clients as you wish.

7Click Security Home Page when you have completed your entry on this page.

Adding or Deleting a Range of Allowed Wireless Clients

1Select Conﬁguration→Security.

2Select Enabled for Access Control.

3Click View/Add/Delete next to Ranges of Allowed Wireless Clients.

The Access Control List - Add/Delete Allowed Ranges page displays.

4Enter the MAC address of the allowed wireless client that begins the range.

5Enter the MAC address of the allowed wireless client that ends the range.

6Click Clear Entry if you decide to modify the range or eliminate the range.

7Click Security Home Page when you have completed your entry on this page.

Adding or Deleting Disallowed Wireless Clients

1Select Conﬁguration→Security.

2Select Enabled for Access Control.

3Click View/Add/Delete next to Disallowed Wireless Clients.

The Access Control List - Add/Delete Disallowed Wireless Clients page displays.

46 CHAPTER 4: CONFIGURING THE ACCESS POINT

4Enter the MAC address of a wireless client that cannot associate with the AP and

click Add Disallowed Wireless Client.

5Click Clear Entry if you decide to remove a wireless client from disallowed status

with the AP.

6Repeat step 4 for as many wireless clients as you wish.

7Click Security Home Page when you have completed your entry on this page.

Enabling or Disabling Encryption

1Select Conﬁguration→Security.

2Select Enabled for WEP (Privacy).

3Select 40 bit key for WEP Algorithm.

4Click Save Settings when you have completed your entry on this page. You will

need to reset the AP using the Special Functions screen to have your encryption

settings take effect, as described later in this section.

Encryption Conﬁguration Requirements

■The encryption level (open, 40-bit, or 128-bit) must be the same on the

wireless client and the access point.

■All Shared Keys on the wireless client must be the same as those on the

access point with which the client will associate. They must match exactly

(key order and hex-digit sequence).

■The selected keys do not need to be the same among different clients

and/or access points.

System Parameters The AP has conﬁguration options to operate the unit, including security access and

interface control. Some parameters do not require modiﬁcation. To conﬁgure the

system parameters, follow the procedure below.

1Select Conﬁguration→System

The System Setup page displays

2Type the AP’s name in the Unit Name text box.

3Enter the appropriate value for Channel.

The table below lists the direct-sequence channel settings for the operating

countries.

4Check Enabled or Disabled for Mobile IP.

5Type a security key in the Mobile-Home MD5 Key text box.

This security word key is used for Mobile-Home registration and authentication.

Frequency No. of Channels Country

2412 11 Standard

2412 13 Europe

2457 2 Spain

2457 4 France

2484 1 Japan

Configuring the AP 47

6Select the status of the Ethernet Timeout and enter the number of seconds

between 30 and 255.

This feature disables radio interface if no activity is detected on the Ethernet line

after the seconds indicated. The AP disassociates wireless clients and prevents

further associations with itself until it detects Ethernet activity.

If the Ethernet Timeout is disabled when the Ethernet connection is broken, the

AP clears the wireless client table and disables the RF interface until the Ethernet

connection is restored.

If the Ethernet Timeout is enabled when the Ethernet connection is broken, the AP

sets the time-out value to zero (0) and attempts to associate with another WLAP in

the network.

7Enter a value in seconds for Agent AD Interval. This speciﬁes the interval in

seconds between the mobility agent advertisement transmission. The default is 0.

8Enable or disable interfaces on the AP.

9Click Clear Entries to reinstate the default settings.

10 Click Save Settings to save your entries on this page.

Radio Frequency

Parameters The AP automatically conﬁgures most radio parameters. Exercise extreme caution

when you adjust radio parameters for the AP since these parameters affect system

operations. Options in the RF Conﬁguration window ﬁne-tune the radio and

WLAP functions. To conﬁgure the radio parameters, follow the procedure below.

1Select Conﬁguration→RF. The RF Setup page displays.

2Enter a value (in packets) for BC/MC QueuMax.This value determines the amount

of memory allocated for the queue used in the AP to temporarily hold

broadcast/multicast messages. The packets corresponds to the maximum-size

Ethernet packets. The default is 10.

3Enter the Max Retries (data) value. The value represents the maximum allowed

retries before the AP aborts a single transmission attempt. The default is 15.

4Enter the Max Retries (voice) value. The value represents the maximum allowed

retries before the AP aborts a single transmission attempt. The default is 15.

5Enter the Multicast Mask (data) and (voice) values.

Interface Description Default Condition

AP-AP State Xchg Specifies AP-to-AP communication

exchanged. If disabled, prevents AP

Auto Configure and AP load leveling

function from operating.

Enabled

WNMP Functions Specifies whether the AP can perform

WNMP functions. Enabled

Ethernet Interface Enables or disables wired Ethernet. On

RF Interface Enables or disables radio. On

Default Interface Specifies the default interface

(Ethernet or PPP) that the AP forwards

a frame to if the AP cannot find the

address in its forwarding database.

Ethernet

48 CHAPTER 4: CONFIGURING THE ACCESS POINT

Wireless LAN supports broadcast download protocols for any wireless client

(typically Point-of-Sale terminals) requiring the expedited download of a new

operating image over the network instead of using a local nonvolatile drive.

All multicast downstream data packets that match the top 32 bits of the multicast

mask are forwarded immediately instead of being queued for transmission at the

next DTIM interval.

6Enter the time between beacons in milliseconds for Beacon Interval.

The default is 100 milliseconds.

7Select Enable or Disable for Accept Broadcast Wireless LAN Service Area.

This feature allows the AP to respond to any station sending probe packets with

the industry-standard broadcast WSA. When Enabled, this feature allows

industry-standard devices interoperability. The AP probe response includes the

WSA_ID and information about the network. By default, this feature is Disabled

and the AP responds only to stations that know the WSA_ID. This helps preserve

network authentication security.

8Enter a value in minutes for the Wireless Client Inactivity Timeout.

This value speciﬁes the number of minutes the AP allows for wireless client

inactivity. A Wireless LAN AP recognizes wireless client activity through data

packet transmission and reception, and through scanning. Wireless LAN clients

conduct active scanning. Other industry-standard wireless clients might conduct

passive scans and a Wireless LAN AP could classify them as inactive.

9Select values for Rate Control at the three transmission rates.

The default values are:

■11 Mbps - Optional

■5.5 Mbps - Optional

■2 Mbps - Required

■1 Mbps - Required

10 Do nothing with the RTS Threshold setting. RTS/CTS operation is not supported at

this time.

11 Click Clear Entries to reinstate the default settings.

12 Click Save Settings to save your entries on this page.

Conﬁguring the SNMP

Agent An SNMP manager application gains access to the AP SNMP agent if the

management application has the AP’s IP address. To ensure security when SNMP is

used, the SNMP agent can be conﬁgured as read-only, read-write, or disabled. The

AP sends speciﬁc traps for some conditions.

See the 3Com MIB on the Wireless LAN Installation and Utilities disk for speciﬁc

entries.

The AP supports SNMP V1, MIB-II and the 3Com.MIB. To conﬁgure the SNMP

agent, follow the procedure below.

1Select Conﬁguration→SNMP.

The SNMP Setup page displays.

2Select a mode for SNMP Agent Mode.

Configuring the AP 49

■Disabled disables SNMP functions.

■Read-only allows get and trap operations.

■Read/Write (default) allows get, set, and trap operations.

3Enter a user-deﬁned password of up to 31 characters for Read-Only Community.

This password is for and identiﬁes users with read-only privileges.

4Enter a user-deﬁned password of up to 13 characters for Read/Write Community.

This password is for and identiﬁes users with read/write privileges. This password

should be the same password as the System Password used to gain access to the

System Conﬁguration page.

5Enter the IP address of the trap manager for Trap IP Address.

6Select Enabled or Disable All for All SNMP Traps.

Use this feature to disable all traps or to selectively enable the individual traps. The

default value is Disabled. The table below explains the traps.

7Click Clear Entries to reinstate the default settings.

8Click Save Settings to save your entries on this page.

Conﬁguring PPP/Modem To use a Point-to-Point (PPP) connection, choose the appropriate hardware

connection (direct or modem). On the System Conﬁguration page, select PPP for

Default Interface.

The PPP interface provides a connection using modems over a telephone line.

Connect modems to the APs with straight-through serial cables. Designate one AP

as the Originating AP and the other AP as the Answering AP. Conﬁgure the

Originating AP with dial-out information to the answering AP. The answering AP

waits for a dial-in from the originating AP.

The AP supports modems that use the generic Hayes Smartmodem command set.

The AP uses Hayes commands and is capable of operating with various modems of

19200 baud or faster. 3Com does not support modems the company has not

qualiﬁed.

The following modems qualify to work with the AP:

■Practical Peripherals PM288MT II V.34

■Supra Fax Modem 288

SNMP Trap Description Default Value

Cold Boot Sends a trap to the manager when the

AP cold boots. Deselected

Authentication Failure Indicates that community strings other

than those specified for the Read-Only

and Read/Write Community were

submitted.

Deselected

Radio Restart Sends a trap to the manager for radio

restart. Deselected

Access Control

Violation Sends a trap to the manager when an

ACL violation occurs. Deselected

DHCP Change Deselected

50 CHAPTER 4: CONFIGURING THE ACCESS POINT

■US Robotics Sportster Modem 28.8

Conﬁguring the Originating Modem

1Select Conﬁguration→PPP/Modem. The PPP/Modem Setup page displays.

2Select Enabled for PPP Interface.

3Select PPP for Serial Port Use.

4Select Originate for Modem Connect Mode.

5Select Yes for Modem Connected.

6Select Auto for Dialout Mode.

7Select the appropriate mode for Modem Speaker.

This setting sends a command to the modem to turn the modem speaker on or

off. The default is On.

8Type the telephone number (maximum 31 characters) of the answering AP for

Dialout Number.

This string follows a typical Hayes Smartmodem ATDT command. Possible

characters include pauses, numbers and letters. Refer to your modem

documentation for speciﬁc information.

9Enter the time in seconds that the AP will wait for a remote connection for Answer

Wait Time.

If the AP does not make a remote connection in the amount of time you specify, it

will discontinue attempts to make a connection. The default is 60 seconds from a

5- to 255-second range.

10 Enter the time in minutes for Inactivity Timeout.

This setting controls the time-out between issuing a PPP packet and the

anticipated reply. This is necessary if the serial connection has long delay periods.

Zero (0) indicates no time-out. The default is 3 from a 0 to 255-minute range.

11 Enter the time in seconds for Maximum PPP Terminates.

This setting controls the PPP-terminate requests an AP issues when a PPP-linked AP

does not respond to a terminate request. The AP closes the PPP connection after

issuing PPP-terminate requests for the maximum time speciﬁed. The default is 10

seconds from a 0-255-second range.

12 Click Modem Dialout to dial the modem.

13 Click the Modem Hangup check box to have the modem hang up after a call.

14 Click Clear Entries to reinstate the default settings.

15 Click Save Settings to save your entries on this page.

Conﬁguring the Answering Modem

1Complete steps 1-3 for conﬁguring the originating modem above.

2Select Answer for Modem Connect Mode.

3Complete steps 5-11 for conﬁguring the originating modem above.

Filtering In order to control the types of network trafﬁc the AP handles or to eliminate

some network trafﬁc, you can conﬁgure the AP to forward or discard particular

Configuring the AP 51

types of packets (TCP/IP, IPX). Or you can allow all trafﬁc through by disabling the

ﬁltering option.

1Select Conﬁguration→Filtering. The Filtering Setup page displays.

2Determine what type of ﬁltering you want to set up and select the appropriate

procedure below.

Filtering to Forward Packets

To conﬁgure the AP to forward packets of particular types, do the following:

1Click Forward as the Type Filtering.

2Enter the four hex digits associated with the network protocol for which you want

the AP to forward packets.

3Click Add Filter.

4Repeat steps 2 and 3 to add additional protocol types.

5Click Clear Entries to reinstate the default settings.

6Click Save Settings to save your entries on this page.

Filtering to Discard Packets

To conﬁgure the AP to discard packets of particular types, do the following:

1Click Discard as the Type Filtering.

2Enter the four hex digits associated with the network protocol for which you want

the AP to discard packets.

3Click Add Filter.

4Repeat steps 2 and 3 to add additional protocol types.

5Click Clear Entries to reinstate the default settings.

6Click Save Settings to save your entries on this page.

Removing Filtered Packet Types (Networking Protocols)

You may have set up particular type of packets for discarding or forwarding by the

AP. If you chose to remove packet types from your list, do the following.

1Highlight the hex number representing the packet type you want to delete.

2Click Delete Filter.

3Click Clear Entries to reinstate the default settings.

4Click Save Settings to save your entries on this page.

Disabling Type Filtering

If you want the AP to handle all types of network trafﬁc, disable type ﬁltering.

1Select Disabled (the default) as the Type Filtering if it is not already selected.

2Click Save Settings to save any changes you made on this page.

52 CHAPTER 4: CONFIGURING THE ACCESS POINT

Updating AP Firmware To upgrade your ﬁrmware, you need a TFTP server and a connection between the

AP and PC on the same Ethernet segment.The ﬁles required for ﬁrmware updates

are 3cap_fw.bin and 3cap_htm.bin.

Verify the PC has a TFTP server running on it. Running the server requires third

party software such as FTP PC/TCP for DOS or OnNet™ for Windows. The wireless

TFTP upgrade method requires a connection between the AP and a TFTP server.

The TFTP server can be running on a 3Com Wireless LAN device.

To update the AP ﬁrmware, do the following:

1Select Conﬁguration→Firmware.The Firmware Download page displays.

The Firmware Filename, HTML Filename, and the TFTP Server values display.

2Do one of the following:

To update only the current AP, select either Firmware, HTML File, or both under

update THIS Access Point’s

To update all APs, select either Firmware, HTML File, or both under Update ALL

Access Points.

3Click Clear Entries to modify your entries or to abort the ﬁrmware upgrade.

4Select Perform Function start the download.

Special Functions The conﬁguration items under Special Functions perform housekeeping functions

on APs. The functions are explained in the table below.

Configuring the AP 53

1Select Conﬁguration→Special Functions. The Special Functions window displays.

2Select all appropriate options. (You can click Clear Entries to remove all of your

entries.) You must select Reset AP to have the settings you have selected in other

AP conﬁguration screens take effect.

3Select Perform Function to execute your choices.

Special Function Description

Clear All Statistics Clears the current statistics for the AP.

Clear Wireless Client Table Ensures that wireless clients associating with the

AP are active. Clear the wireless client association

table for diagnostic purposes. Clear wireless

clients from an AP if the AP has many wireless

client associations that are no longer in use. The

AP removes the wireless clients associated with it.

Wireless clients cleared from an AP will attempt

to reassociate with the AP or another nearby AP.

Clear Access Control List (ACL) -

Individual Clears the list of MAC addresses for the wireless

clients that can associate with the AP.

Clear Access Control List (ACL) -

Range Clears the range of MAC addresses for the

wireless clients that can associate with the AP.

Clear Address Filters Clears filters that have been set up for the AP.

Load ACL from Wireless Client

List Loads the list of MAC address from the wireless

client list.

Reset AP The AP keeps only saved configuration changes

after a reset. Resetting an AP clears statistics and

restores the last saved configuration. If changes

are made and not saved, the AP clears those

changes and restores the factory defaults upon

reset.

After a reset, the AP LEDs flash as they do when

the AP powers up. The AP returns to a

STATUS-flashing state.

Save Configuration to All APs Saves the configuration options you have

selected for the current AP to all APs with the

same network ID on the same subnet.

5MONITORING WIRELESS CLIENTS

Introduction The AP keeps statistics of its transactions during operation. These statistics indicate

trafﬁc, transmission success, and the existence of other radio network devices.

Clear statistics as needed.

Wireless Clients Wireless Client statistics provide information on wireless clients associated with an

AP. The statistics include information on data sent and received, activity and

association. A wireless client shows only in the Home/Foreign Agent Table screens

when the wireless client has roamed to another AP on a different subnet. Once a

wireless client has roamed, the wireless client IP Address displays on the Home

Agent Table screen of the wireless client’s home AP with the IP Address of the

Foreign Agent to tell the “home” AP where to forward packets.

The wireless client IP Address is also shown in the Foreign Agent Table and Regular

screens of the new “foreign” AP to tell the new AP where to expect packets from

for newly associated wireless clients. The AP Regular screen shows the wireless

clients associated locally on the same subnet.

1Select Wireless Client from the Main Menu.

2Use the Tab or arrow keys to highlight the desired screen.

3Press Enter to display the screen you selected.

4Select Regular at the Wireless Clients prompt.

The display shows the currently associated wireless clients listed by MAC address.

The list appears as follows: addr [p:i#:e]

Variable Description

addr Wireless client MAC address

(xx:xx:xx:xx:xx:xx format)

p Wireless clients power mode:

■P–PSP

■C–CAM.

An unassociated wireless client does not

display any character

i Wireless client location on AP interfaces:

■R–radio,

■P–PPP.

■A–associated with AP in the past, but

not at time of verifying status

# Current AP radio transmit rate (Mbps) for

messages sent to this wireless client.

V Indicates a 3Com voice-enabled device.

Clearing Statistics 55

5Select Start Refresh to have the AP automatically update the display every two

seconds.

The information displayed about the wireless client includes the following:

6Select Refresh at the bottom of the window to update the values manually.

7Press Close to return to the previous menu.

Clearing Statistics To clear statistics, do the following:

1Select Special Functions from the Main Menu.

2Select Clear All Statistics.

The AP zeroes out all statistics. Resetting the AP also clears statistics.

Category Description

Interface Displays the wireless client connection (RF, Ethernet, PPP

or AP)

State Connection state between the AP and the wireless client:

■Host–unit is on AP or PPP interface

■Associated–current association on radio interface

■Away–unit is no longer associated with AP.

Power Mode Wireless client power mode (CAM, PSP, or N/A)

Station ID The IEEE 802.11 specification requires that each AP assign

a station ID to all associated wireless clients, regardless of

the wireless client power mode (PSP or CAM)

Begin Current Assoc Time at which current association began (hh:mm:ss)

Supported Rates Indicates data station supported transmission rates

Current Xmt Rate Current rate of AP-station data transmissions

Packets Sent Number of packets sent by AP to wireless client

Packets Rcvd Number of packets received by AP from wireless client

Bytes Sent Number of bytes sent by AP to wireless client

Bytes Rcvd Number of bytes received by AP from wireless client

Discard Pkts/CRC Number of packets discarded because of data error

Last Activity Amount of time since the last communication with AP

(hh:mm:ss)

Last Data Activity Amount of time since the last data transfer (hh:mm:ss)

6CONFIGURING THE AP USING THE

ASCII INTERFACE

Introduction Software conﬁguration consists of setting up a connection to the Access Point (AP)

and gaining access to the User Interface (UI).

Gaining Access to the

User Interface (UI) The method for establishing access to the UI depends on the connection used.

Select the setup that best ﬁts the network environment. Your connection options

are:

■Telnet

■Direct serial connection

■Dial-up connection

If using a PPP or serial connection, access the UI through a Telnet session.

Using Telnet Using a Telnet session to gain access to the UI requires that a remote station has a

TCP/IP stack. The remote station can be on the wired or wireless LAN.

To access the AP from the workstation, follow the procedure below.

1From the DOS prompt, Telnet to the AP using its IP address:

Telnet xxx.xxx.xxx.xxx

2Type the appropriate password (case sensitive) at the prompt.

comcomcom

3Press ESC. The AP displays the Main Menu. If the session is idle (due to no input,

for example) for the conﬁgured time, the session terminates. To manually

terminate the session, press CTRL+D.

4Select the Set System Conﬁguration option to set the System Password.

NOTE: Before conﬁguring the AP, you may wish to upgrade the Wireless LAN

ﬁrmware to the latest version. Refer to “Manually Updating AP Firmware” on

page 73.

NOTE: The dot in front of certain parameters, functions, or options (.Antenna

Selection Primary Only) indicates these items update to all APs with the same

WLAN Service Area when you select the “Upgrade ALL APs” [F2] option. This

option can only be executed among the same hardware platforms and same

ﬁrmware versions.

Navigating the UI 57

Using a Direct Serial

Connection To use the ASCII interface with a direct serial connection, follow the instructions in

the AP Quick Start Guide, included in your package.

Using a Dial-Up

Connection The AP supports a dial-up connection to the UI. This requires accessing the UI from

Telnet or a direct serial connection and changing the serial port conﬁguration.

Conﬁgure the AP for the following:

■Enable serial port.

■Set serial port for UI.

■Disable any modem connection.

■Set AP to answer mode.

Select the Set Serial Port Conﬁguration option to conﬁgure these settings. For

details on conﬁguring these settings, see “Conﬁguring for Dial-Up to the UI”.

Navigating the UI Use the following keystrokes to navigate through the UI menus and windows

depending on the terminal emulation. For terminal emulation programs that do

not support arrow or function keys, use the control-character equivalents.

The following conventions also apply to navigating windows and menus:

■To select menu items, press the key corresponding to the bold letter for the

item (case-sensitive hot key). Press Enter to select the item.

■Press Tab to scroll through menu items.

■To change menu items, select items from the bottom line of the Main Menu for

conﬁguration options. For multiple choice options, press the bold letter to

select. To change values, type in the new value and press Enter. If the value is

invalid, the AP beeps and restores the original value. Press Tab to scroll to the

next menu item.

■Select an option from the bottom line on the menu to enable changes to take

effect. Press Tab to scroll to the item and press Enter to select it.

■When you change values, such as System Name or System Password, accept

values by scrolling to the next ﬁeld or pressing Enter.

■You can use function keys to enable commands in some windows. For

example, statistic windows include Refresh-[F1] and Timed-[F2] command/key

combinations to update the display.

Arrow/Function Key Control Character

Up Arrow CTRL + O

Down Arrow CTRL + I

Left Arrow CTRL + U

Right Arrow CTRL + P

F1 CTRL + Q

F2 CTRL + W

F3 CTRL + E

F4 CTRL + R

58 CHAPTER 6: CONFIGURING THE AP USING THE ASCII INTERFACE

■Some options listed at the bottom of screens indicate possible commands for a

selected item. For example, in the Known APs window, highlighting an AP on

the list and pressing F1 brings up the Ping function to Ping that AP.

■To exit from submenus, press Esc.

Administration screens include options for saving or clearing data that appear on

the bottom line of the screen. Conﬁrmation prompts are listed below.

Entering Admin Mode The UI defaults to User mode, allowing read-only access to the AP’s functions

(view statistics, for example). Switching to Admin mode provides access to

conﬁguration menus and allows you to conﬁgure the AP.

To enter Admin mode requires the administration password. To enter Admin

mode, do the following:

1Select Enter Admin Mode from the Main Menu. The AP prompts for the

administration password:

Enter System Password:

2Type the default (case sensitive) password:

comcomcom

■If the password is correct, the AP displays the Main Menu with the Enter Admin

Mode menu item changed to Exit Admin Mode.

■If the password is incorrect, the AP continues to display the Main Menu with

the Enter Admin Mode menu item.

Prompt Description

OK Registers settings but does not save them in

nonvolatile memory (NVM). A reset command returns

to previously saved settings.

Save Saves all settings (including ones not on that screen) to

NVM. This is the same as Save Configuration in the

Special Functions screen.

Save ALL APs To save the AP installation configuration information

to all APs with the same WLAN Service Area. This

option saves the configuration changes for the current

AP on the Known APs table to update their

configurations and reset after the configuration has

been modified. Users can perform this option only

among the same hardware platforms and same

firmware versions. Example: AP-3020 running FW

4.01-xx.

Cancel Does not register settings changed in a screen.

NOTE: Set the System password in the Set System Conﬁguration screen. See

“Changing the Access to the UI” for more details.

Navigating the UI 59

Changing the Access to

the UI To prevent unauthorized Telnet access, change the conﬁguration access to the UI.

This includes enabling or disabling the Telnet Logins or changing the System

Password.

To change Telnet access to the AP, do the following:

1Select Set System Conﬁguration from the Main Menu.

2Select Telnet Logins.

3Press the space bar or left/right arrow to toggle between Enabled and Disabled.

4Press Tab to highlight the SAVE-[F1] function at the bottom of the screen.

5Press Enter to conﬁrm the save.

To change the System Password, do the following:

1Select Set System Conﬁguration from the Main Menu.

2Press Tab to select System Password.

3Type the new password and press Enter.

4Press Tab to highlight the SAVE-[F1] function at the bottom of the screen.

5Press Enter to conﬁrm the save.

Conﬁguring for Dial-Up

to the UI A dial-up connection requires a straight-through Ethernet cable between the

modem and the AP. The remote PC requires a modem and a communication

program, such as HyperTerminal.

The AP supports modems that use the generic Hayes Smartmodem command set.

The AP uses Hayes commands and is capable of working with various modems of

19200 baud or faster. 3Com does not support modems the company has not

qualiﬁed.

The following modems qualify to work with the AP:

■Practical Peripherals PM288MT II V.34

■Supra Fax Modem 288

■USRobotics Sportster Modem 28.8

Conﬁguring The Serial Port

To enable and conﬁgure the serial port connection on the AP:

1Select Set Serial Port Conﬁguration from the Main Menu.

2Set the Port Use parameter to PPP.

3Set the Modem Connected parameter to Yes.

60 CHAPTER 6: CONFIGURING THE AP USING THE ASCII INTERFACE

Conﬁgure the other settings as required on the AP. The table below explains the

other settings.

Conﬁguring the Dial-Up System

To conﬁgure the Dial-up System, (assuming the PPP, serial port, and answer mode

are enabled on the AP), follow the procedure below.

1Attach a null-modem serial cable from the AP to the modem.

2Verify the modem connects to the telephone line and has power. Refer to the

modem documentation for information on verifying device power.

3Start the communication program from the remote terminal.

4Select the correct serial port along with the following parameters:

■Emulation—ANSI

■Baud rate—19200 bps

■Data bits—8

■Stop bits—1

■Parity—none

■Flow control—none

5Dial out to the AP with the appropriate telephone number. No password is

required.

6Press Esc to refresh the display.

The AP displays the Main Menu.

Hanging Up

To hang up from the UI while a call is still connected:

1Select Special Functions from the Main Menu.

2Select Modem Hangup.

Setting Description

Answer Wait Time The time waiting for a remote

connection before dropping the

attempt. The default is 60 seconds.

Modem Speaker AP sends a command to the modem to

turn on/off the modem speaker. The

default is On.

Inactivity Timeout The inactivity time on the UI that causes

the AP to terminate the connection

while using a modem. The default is 5

minutes. A value of zero indicates no

time-out.

Access Point Installation 61

Access Point

Installation The AP UI includes an AP Installation window in which you can set basic

parameters for a Wireless LAN network. These parameters include designating a

gateway address that enables message forwarding across routers on the wired

Ethernet.

To install an AP, follow the procedure below.

1Enter Admin Mode.

2Select AP Installation from the Main Menu to display the Access Point Installation

window.

3Verify that the AP parameters reﬂect the network environment and change the

parameters as needed.

4Press the space bar or the Left or Right Arrows to toggle between Primary Only

and Primary and Secondary in the Antenna Selection ﬁeld.

5Do one of the following:

■Select OK to register the settings.

Or:

■Select Save to write changes to NVM, which generates a conﬁrmation prompt.

6Select Save ALL APs [F2] to save the AP installation conﬁguration information to all

APs with the same WLAN Service Area.

This option saves and updates the conﬁguration changes for the current AP on the

Known APs table. The AP is reset after the conﬁguration has been modiﬁed. You

can execute this option only among the same hardware platforms and same

ﬁrmware versions.

7Select Cancel-[ESC] to disregard any changes made in this window and return to

the previous menu.

Parameter Description

Unit Name AP name.

IP Address Network-assigned Internet Protocol address of the AP.

Gateway IP Address IP address of a router the AP uses on the Ethernet default

gateway.

Subnet Mask The Subnet Mask consists of four sets of digits that help

divide a network into subnetworks and simplify routing and

data transmission:

■Sets 1 and 2—Network domain.

■Set 3—Subset of hosts within a larger network.

■Set 4—Individual computer.

WLAN Service Area The unique, 32-character, alphanumeric, case-sensitive

network identifier of the AP.

Antenna Selection Enables selection of antenna diversity.

Additional Gateways The IP address of the additional gateways used. You can

access up to eight gateways.

62 CHAPTER 6: CONFIGURING THE AP USING THE ASCII INTERFACE

Conﬁguring the AP The AP has many conﬁguration parameters. This section discusses all the AP

parameters and how to set them.

System Parameters The AP has conﬁguration options to operate the unit, including security access and

interface control. Some parameters do not require modiﬁcation. To conﬁgure the

system parameters, follow the procedure below.

1Select Set System Conﬁguration from the Main Menu, which generates the

System Conﬁguration window.

2Select the appropriate value from the table below to conﬁgure the

direct-sequence channel settings for the operating country.

3Conﬁgure the AP system settings as required. The parameters are explained in the

table below.

Frequency No. of Channels Country

2412 11 US (standard)

2412 13 Europe

2457 2 Spain

2457 4 France

2484 1 Japan

Ethernet Timeout Disables radio interface if no activity is detected on the Ethernet line after

the seconds indicated (a range from 30-255). The AP disassociates

wireless clients and prevents further associations until it detects Ethernet

activity.

Value

■0—Default value. disables this feature.

■1—Detects whether the 10Base-T line goes down

■2—WLAP sends a WLAP Alive BPDU on the Ethernet line every WLAP

Hello Time seconds to allow WLAPs on the Ethernet line to detect its

existence.

■3—WLAP tracks the WLAP Alive BPDU. If the BPDU is missing for

WLAP Hello Time seconds, the WLAP state changes to WLAP Lost on

Ethernet. Once the WLAP Alive BPDU is detected, the WLAP resets

and starts over.

When the Ethernet connection is broken:

■If the WLAP mode is disabled, the AP clears the wireless client table

and disables the RF interface until the Ethernet connection comes up.

■If the WLAP mode is enabled, the AP sets the time-out value to zero

(0), resets itself, and attempts to associate with another WLAP in the

network.

Telnet Logins Specifies whether the AP accepts or rejects Telnet Logins. The default

value is Enabled.

System Password For administrative access, select any alphanumeric, case-sensitive entry up

to 13 characters. The default System Password is comcomcom.

Agent Ad Interval Specifies the interval in seconds between the mobility agent

advertisement transmission. The default is 0.

Wireless LAN

Mobile IP If enabled, this feature allows wireless clients to roam across routers. The

default is Disabled.

Mobile-Home MD5

key Secret key used for Mobile-Home registration and authentication.

Configuring the AP 63

4To enable or disable interfaces on the AP, modify the following parameters:

5Verify that values reﬂect the network environment and change them as needed.

6Do one of the following:

■Select OK to register the settings.

Or:

■Select Save to write changes to nonvolatile memory (NVM), which generates a

conﬁrmation prompt.

7Select Save ALL APs [F2] to save the RF Conﬁguration information to all APs with

the same WLAN Service Area.

This option saves the conﬁguration changes for the current AP, and sends two

WNMP messages to all other APs on the Known APs table to update their

conﬁgurations and reset them after the conﬁguration has been modiﬁed. You can

execute this option only among the same hardware platforms and same ﬁrmware

versions.

8Select Cancel-[ESC] to cancel any changes you made to this screen and return to

the previous menu.

Radio Parameters The AP automatically conﬁgures most radio parameters. Exercise extreme caution

when adjusting radio parameters for the AP since these parameters affect system

operations. Options in the RF Conﬁguration window ﬁne-tune the radio and

WLAP functions. To conﬁgure the radio parameters, follow the procedure below.

1Select Set RF Conﬁguration from the Main Menu to display the RF Conﬁguration

window.

2Conﬁgure the settings as required. The table below describes the Conﬁguration

parameters.

Web Server Enables the use of a Web based browser to access the UI instead of

HyperTerminal or Telnet applications. An AP Reset is required for this

feature to take effect.

Access Control Specifies enabling or disabling the access control feature. If enabled, the

ACL (Access Control List) specifies the MAC addresses of wireless clients

that can associate with this AP. The default is Disabled.

Type Filtering Specifies filter type for packets received either Forward/Discard or

Disabled. The default value is Disabled.

WNMP Functions Specifies whether the AP can perform WNMP functions. The default

value is Enabled.

AP-AP State Xchg Specifies AP-to-AP communication exchanged. If Disabled prevents AP

Auto Configure and AP load leveling function. The default is Enabled.

Parameter Description

Ethernet Interface Enables or disables wired Ethernet. The default value is On.

PPP Interface Enables or disables serial PPP. The default value is Off.

RF Interface Enables or disables radio. The default value is On.

Default Interface Specifies the default interface (Ethernet or PPP) that the AP

forwards a frame to if the AP cannot find the address in its

forwarding database. The default interface is Ethernet.

64 CHAPTER 6: CONFIGURING THE AP USING THE ASCII INTERFACE

3Verify that values reﬂect the network environment and change them as needed.

4Do one of the following:

■Select OK to register the settings.

Or:

■Select Save to write changes to NVM, which generates a conﬁrmation prompt.

Parameter Description

DTIM Interval Configure DTIM packet frequency as a multiple of beacon packets. The

DTIM Interval indicates how many beacons equal one cycle. Do not

modify.

BC/MC Q Max Determines the memory allocated for the queue used in the AP to

temporarily hold broadcast/multicast messages. Unit measure is in

packets and corresponds to maximum-sized Ethernet packets. The

default is 10.

Max Retries (d) The maximum allowed retries before aborting a single transmission.

The default is 15.

Max Retries (v) The maximum allowed retries before aborting a single transmission.

The default is 5.

Multicast Mask (d)

and (v) Wireless LAN supports broadcast download protocols for any wireless

client (typically Point-of-Sale terminals) requiring the expedited

download of a new operating image over the network instead of using

a local nonvolatile drive.

All multicast downstream data packets that match the top 32 bits of

the multicast mask are forwarded immediately instead of being

queued for transmission at the next DTIM interval.

Beacon Interval The time between beacons in milliseconds. The default is 100.

Accept Broadcast

WSA_ID Allows the AP to respond to any station sending probe packets with

the industry-standard broadcast WSA. If Enabled, this feature allows

industry-standard devices interoperability. The AP probe response

includes the WSA_ID and information about the network. By default,

this feature is Disabled and the AP responds only to stations that know

the WSA_ID. This helps preserve network authentication security.

Wireless Client

inactivity Timeout Allows industry-standard device interoperability by specifying the time

the AP allows for wireless client inactivity.

A Wireless LAN AP recognizes wireless client activity through data

packet transmission and reception, and through scanning. Wireless

LAN clients conduct active scanning. Other industry-standard wireless

clients might conduct passive scans and a Wireless LAN AP could

classify them as inactive.

Rate Control Defines the data transmission rate:

■ 11 Mbps–Optional

■ 5.5 Mbps–Optional

■ 2 Mbps–Required

■ 1 Mbps–Required

Fragmentation

Threshold Fragmentation is not supported at this time.

RTS Threshold RTS/CTS operation is not supported at this time.

Configuring the AP 65

5To save the RF Conﬁguration information to all APs with the same WLAN Service

area, select Save ALL APs [F2].

This option saves the conﬁguration changes for the current AP, and sends two

WNMP messages to all other APs on the Known APs table to update their

conﬁgurations and reset them after the conﬁguration has been modiﬁed. You can

execute this option only among the same hardware platforms and same ﬁrmware

versions.

6Select Cancel-[ESC] to disregard any changes made to this window and return to

the previous menu.

Conﬁguring PPP To use a Point-to-Point (PPP) connection, choose the appropriate hardware

connection (direct or modem). Verify the enable status of the serial port) in the

System Conﬁguration menu.

PPP Direct

PPP direct is a direct null-modem serial cable connection between an AP and

computer. To conﬁgure PPP direct, follow the procedure, below.

1Select Set Serial Port Conﬁguration from the Main Menu. The Serial Port

Conﬁguration window will be generated.

2Set the Port Use parameter to UI.

3Verify that the Modem Connected parameter setting is No.

4Set the Connect Mode parameter to Answer.

Establishing a Connection

To establish the PPP port connection on the AP, do the following.

1Select Set System Conﬁguration from the Main Menu.

2Set the PPP Interface to OFF.

3Press the space bar or left/right arrows to change the value.

4Press Enter to conﬁrm the change.

PPP with Modems

The PPP interface provides a connection using modems over a telephone line.

Connect modems to the APs with null-modem (straight-through) serial cables.

Designate one AP as the Originating AP and the other AP as the Answering AP.

Conﬁgure the Originating AP with dial-out information to the answering AP. The

answering AP waits for the originating AP to dial in to it.

The AP supports modems that use the generic Hayes Smartmodem command set.

The AP uses Hayes commands and is capable of working with various modems of

19200 baud or faster. 3Com does not support modems the company has not

qualiﬁed.

66 CHAPTER 6: CONFIGURING THE AP USING THE ASCII INTERFACE

The following modems qualify to work with the AP:

■Practical Peripherals PM288MT II V.34

■Supra Fax Modem 288

■USRobotics Sportster Modem 28.8

Dial out manually through the Special Functions menu or dial out automatically

when the system boots up.

Originating AP To conﬁgure an originating AP, do the following from the UI of

the originating AP:

1Select Set Serial Port Conﬁguration from the Main Menu.

2Set the Port Use parameter to PPP.

3Set the Modem Connected parameter to Yes.

4Set the Connect Mode to Originate.

5Select Dialout Number and type the dial-out telephone number of the answering

AP (maximum 31 characters).

This string matches what follows a typical Hayes Smartmodem ATDT command.

Possible characters include pauses, numbers, and letters. Refer to your modem

documentation.

6Set the Dialout Mode to Auto.

7Conﬁgure the remaining settings as required.

Answering AP From the answering APs UI:

1Select Set Serial Port Conﬁguration from the Main Menu.

2Set the Port Use parameter to PPP.

3Set the Modem Connected parameter to Yes.

4Set the Connect Mode to Answer.

5Conﬁgure the other required settings the same as on the originating AP.

Parameter Description

Answer Wait

Time Time in seconds waiting for a remote connection before dropping attempt.

The default is 60 (range: 5 - 255)

Modem Speaker Sends a command to the modem to turn the modem speaker on or off. The

default is On.

PPP Timeout Controls the time-out between issuing a PPP packet and the anticipated

reply. This is necessary if the serial connection has long delay periods. Zero

(0) indicates no time-out. The default is 3 from a 0 to 255-second range.

PPP Terminates Controls the PPP terminate requests the AP issues when a PPP-linked AP

does not respond to a terminate request. The AP closes the PPP connection

after making the maximum requests. The default is 10 from a 0 to

255-terminate request range.

Configuring the AP 67

Initiating Modem Connection To manually initiate dial-out from the

originating AP to the answering AP, do the following:

1Select the Special Functions Menu from the Main Menu.

2Select Modem Dialout.

The AP dials out and attempts to make a connection according to parameters set

in the Serial Port Conﬁguration. If dial-out fails, the AP switches to manual

dial-out.

To hang up, do the following:

1Select Special Functions from the Main Menu.

2Select Modem Hangup.

Conﬁguring the SNMP

Agent An SNMP manager application gains access to the AP SNMP agent if it has the AP

IP address. The agent conﬁgures as read-only, read-write or disabled to provide

security when using SNMP. The AP sends speciﬁc traps for some conditions. Ensure

the SNMP trap manager recognizes how to manage these traps.

See the 3Com MIB on the Wireless LAN Installation and Utilities disk for speciﬁc

entries.

The AP supports SNMP V1, MIB-II and the 3Com.MIB. To conﬁgure the SNMP

agent, use the following procedure.

1Select Set SNMP Conﬁguration from the Main Menu, which generates the SNMP

Conﬁguration window.

2Conﬁgure the settings as required.

NOTE: For automatic dial-out, reset the AP.

Parameter Description

SNMP Agent

Mode Defines the SNMP agent mode:

■Disabled—Disables SNMP functions.

■Read-only—Allows get and trap operations.

■Read/Write (default)—Allows get, set, and trap operations.

Read-Only

Community User-defined password string up to 31 characters identifying users with

read-only privileges.

Read/Write

Community User-defined password up to 13 characters for users with read/write

privileges. Ensure the password used matches the System Password used

to gain access to the System Configuration screen.

Trap IP Address Trap manager IP address.

All Traps Enables or disables all trap operations. The default value is Disabled.

Cold Boot Send a trap to manager when the AP cold boots. The default value is

Disabled.

Authentication

failure Indicates that community strings other than those specified for the

Read-Only and Read/Write Community were submitted. The default value

is Disabled.

Radio Restart Send a trap to manager for radio restart. The default is value Disabled.

68 CHAPTER 6: CONFIGURING THE AP USING THE ASCII INTERFACE

3Verify that values reﬂect the network environment and change them as needed.

4Do one of the following:

■Select OK to register the settings.

Or:

■Select Save to write changes to NVM, which generates a conﬁrmation prompt.

5Select Save ALL APs [F2] to save the SNMP Conﬁguration information to all APs

with the same WLAN Service Area.

This option saves the conﬁguration changes for the current AP, and sends two

WNMP messages to all other APs on the Known APs table to update their

conﬁgurations and reset them after the conﬁguration has been modiﬁed. You can

execute this option only among the same hardware platforms and same ﬁrmware

versions.

6Select Cancel-[ESC] to disregard any changes made to this screen and return to the

previous menu.

Conﬁguring the ACL The ACL supports adding wireless client entries by individual MAC address or by a

range of MAC addresses. To select a a method of adding wireless clients, do the

following:

1Select Set Access Control List from the Main Menu. The prompt below displays:

Address Type? range individual

2Press up/down arrows to toggle between range and individual.

Range of Wireless Clients

To select a range of MAC addresses, follow the procedure below.

1Type the minimum MAC address as the top value.

00:0A:F8:F0:01:01

2Press Enter to accept the value.

3Press down arrow to select the maximum value.

4Type the maximum MAC address in the bottom value.

00:0A:F8:F0:02:FF

5Press Enter to accept the value.

Access Cntrl

Violation Send a trap to manager when an ACL violation occurs. The default value

is Disabled.

DHCP Change If enabled, this trap generates the following enterprise-specific traps:

■Gateway Address Change—Indicates the gateway address for the

router has changed.

■IP Address Change—Indicates the IP address for the AP has changed.

■IP Address Lease is up—Informs you the IP address leased from the

DHCP server is about to expire.

Parameter Description

Configuring the AP 69

6Press down arrow to select OK.

7Press Enter. The UI generates the Ranges of Allowed Mobile Units window.

8Verify that values reﬂect the network environment and change them as needed.

9Select Delete [F1] to delete a range of Mobile Units.

10 Select Add [F2] to add a range of Mobile Units.

11 Select Save ALL APs [F3] to save the Ranges of Allowed Mobile Units information

to all APs with the same WLAN Service Area.

This option saves the conﬁguration changes for the current AP, and sends two

WNMP messages to all other APs on the Known APs table to update their

conﬁgurations and reset them after the conﬁguration has been modiﬁed. You can

execute this option only among the same hardware platforms and ﬁrmware

versions.

12 Select Exit-[ESC] to return to the previous menu.

When you enable the Access Control option, all wireless clients within the

speciﬁed range can associate with the AP. Specify additional ranges as needed or

add to the ACL using individual address entries.

Adding Allowed Wireless Clients

The Access Control List screen provides a facility to add wireless clients to the ACL.

To do so, follow the procedure below.

1Select Set Access Control List from the Main Menu.

The prompt below displays.

Address Type? range individual

2Press the up/down arrows to toggle between range and individual.

3Press Add [F2].

The AP prompts for a MAC address.

00:00:00:00:00:00

4Enter the MAC address. You can enter MAC addresses without colons.

5Select Save ALL APs [F3] to save the AP installation conﬁguration information to all

APs with the same WLAN Service Area.

This option saves the conﬁguration changes for the current AP, and sends two

WNMP messages to all other APs on the Known APs table to update their

conﬁgurations and reset them after the conﬁguration has been modiﬁed. You can

execute this option only among the same hardware platforms and ﬁrmware

version.

Removing Allowed Wireless Clients

To remove wireless clients, do the following:

1Select the Allowed Mobile Units window.

2Highlight the wireless client you want to remove using the Up or Down Arrows.

3Press Delete - [F1].

70 CHAPTER 6: CONFIGURING THE AP USING THE ASCII INTERFACE

Enable/Disable the ACL

To toggle between enable or disable, locate the ACL in the System Conﬁguration

window, then do the following:

1Select Set System Conﬁguration from the Main Menu.

2Press Tab to select Access Control.

3Press space bar to Enable.

4Select Save to save changes.

Removing All Allowed Wireless Clients

You can remove all wireless clients from the ACL by following the procedure

below.

1Select Special Functions from the Main Menu.

2Select Clear ACL.

Load ACL from Wireless Client List

The Load ACL from wireless client List option, from the Special Functions menu,

takes all currently associated wireless clients and creates an ACL from them. This

builds an ACL without you having to manually type addresses. Edit the ACL using

the add and delete functions.

1Select Special Functions from the Main Menu.

2Select Load ACL from wireless client List to add the addresses of associated

wireless clients to the ACL.

Filtering The AP has two types of ﬁltering: address ﬁltering and type ﬁltering. This section

explains the two types of ﬁltering and how to use them.

Address Filtering

The AP can keep a list of the MAC addresses of wireless clients that are disallowed

from associating with it. The Disallowed Addresses option provides security by

preventing unauthorized access by known devices. Use the option for preferred

association of wireless clients to APs. To ﬁlter by MAC address, follow the

procedure below.

1Select Set Address Filtering from the Main Menu, which generates the Disallowed

Addresses list window.

2View the list to determine whether you would like to add or delete addresses from

the list.

Adding Disallowed Wireless Clients To add wireless clients to the Disallowed

Addresses list, do the following:

1Select Set Address Filtering from the Main Menu.

2Select Add -[F2]. The AP prompts for a MAC address.

00:00:00:00:00:00

Clearing Wireless Clients from the AP 71

3Enter the appropriate MAC address. You can enter MAC addresses without

colons.

Removing Disallowed Wireless Clients To remove wireless clients from the

Disallowed Addresses list, do the following:

1Select Set Address Filtering from the Main Menu.

2Highlight the MAC address using the Up or Down Arrows.

3Select Delete-[F1] to delete the MAC address.

Type Filtering

Packet types supported for the type ﬁltering function include the 16-bit DIX

Ethernet types. The list can include up to 16 types.

Adding Filter Types To add packet types to the Type Filtering list, do the

following:

1Select Set Type Filtering from the Main Menu.

2Select Add-[F2].

3Enter the packet type.

Removing Filter Types To remove packet types from the Type Filtering list, do

the following:

1Select Set Type Filtering from the Main Menu.

1Highlight the packet type by pressing up/down arrows.

2Select Delete.

Controlling Type Filters Set the type ﬁlters to forward or discard the types

listed. To control the type ﬁltering mode:

1Select Set System Conﬁguration from the Main Menu.

2Select Type Filtering.

3Press space bar to toggle between the Forward, Discard or Disable type ﬁltering.

4Press Enter to conﬁrm your choice.

5Select Save ALL APs [F2] to save the Type Filtering Setup information to all APs

with the same WLAN Service Area.

You can execute this option only among the same hardware platforms and

ﬁrmware versions.

Clearing Wireless

Clients from the AP The Clear wireless client Table feature ensures that wireless clients associating with

the AP are active. You should only clear the wireless client association table for

diagnostic purposes, or if the AP has many wireless client associations that are no

longer in use.

72 CHAPTER 6: CONFIGURING THE AP USING THE ASCII INTERFACE

To clear wireless clients associated with an AP, do the following:

1Select Special Functions from the Main Menu.

2Select Clear wireless client Table.

The AP removes the wireless clients associated with it. Wireless Clients cleared

from an AP attempt to reassociate with the AP or another nearby AP.

Setting Logging

Options The AP keeps an event log based on settings for logging options. This allows the

administrator to log important events and keeps the log concise through the

128-entry circular buffer. To set even logging options, do the following:

1Select Set Event Logging Conﬁguration from the Main Menu, which generates the

Event Logging Conﬁguration window.

2Set Any Event Logging to Enabled to log all events.

3Disable events that do not require logging when Any Event Logging is disabled.

4Press space bar or left/right arrows to toggle between Enabled and Disabled.

5Verify that values reﬂect the network environment and change them as needed.

6Do one of the following:

■Select OK to register the settings.

Or:

■Select Save to write changes to NVM, which generates a conﬁrmation prompt.

Parameter Description

Any Event Logging Logs all events listed in the window.

Security Violations Logs ACL filter or administrative password access violations.

MU State Changes Allows logging of all wireless client state changes.

WNMP Events Logs WNMP events such as wireless clients using WNMP.

Serial Port Events Logs serial port activity.

AP-AP Msgs Logs AP to AP communication.

Telnet Logins Logs telnet sessions for monitoring and administration.

System Events Internal use only.

Ethernet Events Logs events such as packet transmissions and errors.

Manually Updating AP Firmware 73

7Select Save ALL APs [F2] to save the Event Logging Conﬁguration information to

all APs with the same WLAN Service Area.

This option saves the conﬁguration changes for the current AP, and sends two

WNMP messages to all other APs on the Known APs table to update their

conﬁgurations and reset them after the conﬁguration has been modiﬁed. You can

execute this option only among the same hardware platforms and ﬁrmware

versions.

8Select Cancel [ESC] to disregard any changes made to this screen and return to the

previous menu.

Manually Updating AP

Firmware You have two options for manually updating the AP ﬁrmware. You can use either

of the following:

■A TFTP host

■Any computer using the Xmodem ﬁle transfer protocol.

The two ﬁles required for ﬁrmware updates are:

3cap_fw.bin

3cap_htm.bin

Update using TFTP The Ethernet TFTP upgrade method requires a connection between the AP and PC

on the same Ethernet segment. Verify the PC has a TFTP server running on it.

Running the server requires third party software such as FTP PC/TCP for DOS or

OnNet™ for Windows. The wireless TFTP upgrade method requires a connection

between the AP and a TFTP server. The TFTP server can be running on a 3Com

Wireless LAN device.

Updating the ﬁrmware requires that a TFTP server be running in the background.

To update the AP ﬁrmware using TFTP, do the following:

1Copy the ﬁrmware ﬁles 3cap_fw.bin and 3cap_htm.bin to the terminal or PC hard

disk.

2Telnet to the AP using its IP address.

3Type the case-sensitive password at the prompt, which generates the Main Menu.

4Select Special Functions from the Main Menu.

5Select Alter Filename(s)/HELP URL/TFTP and press Enter.

Type the ﬁrmware ﬁle name in the Download Filename ﬁeld..

6Only change this ﬁle name if you are required to do so. The default ﬁle names are

3cap_fw.bin and 3cap_htm.bin. Verify that the path to the ﬁles is accurate.

7Enter the TFTP Server IP address in the TFTP Server ﬁeld.

8Press Enter.

9Select Save Conﬁguration to save settings.

NOTE: The remainder of this procedure uses Windows 98 as an example.

74 CHAPTER 6: CONFIGURING THE AP USING THE ASCII INTERFACE

10 Select Special Functions from the Main Menu.

11 Select Use TFTP to Update Access Points and press Enter., which generates the

following prompt: “Are you sure (Y/N)?”

12 Type y. The Telnet session ends when you type y at the prompt. The WIRED LAN

ACTIVITY indicator on the AP does not ﬂash. The AP resets when the ﬁle transfer

and ﬂash programming complete.

13 Telnet to the AP using its IP address.

14 Type the case-sensitive password at the password prompt, which generates the

Main Menu.

15 Verify the accuracy of the version number on the System Summary window.

16 Press Ctrl+D to end the Telnet session.

17 Repeat this process for other APs in the network.

Updating using

Xmodem The Xmodem upgrade method requires a direct connection between the AP and

PC using a null-modem serial cable and software such as HyperTerminal for

Windows 95. Xmodem supports ﬁle transfers between terminal emulation

programs and the AP UI. Xmodem transfers require more time than TFTP transfers.

To update the AP ﬁrmware using Xmodem, follow the procedure below.

1Copy the ﬁrmware ﬁles 3cap_fw.bin and 3cap_htm.bin to the PC hard disk that

runs a terminal emulation program.

2Attach a null-modem serial cable from the AP to the PC serial port.

3Start the communication program on the PC.

Name the session “Wireless LAN AP” and select OK.

4Select the correct communication port, typically Direct to Com1, along with the

following parameters:

■Emulation—ANSI

■Baud rate—19200 bps

■Data bits—8

■Stop bits—1

■Parity—none

■Flow control—none

5Select OK.

6Press Enter to display the Main Menu.

7Select Enter Admin Mode and type the case-sensitive password.

8Open the Special Functions window.

9Select Firmware, HTML ﬁle, or Both under the function heading Use XMODEM to

Update Access Points.

NOTE: The remainder of this procedure uses Windows 98 as an example.

Auto Upgrade all APs Via Messaging 75

Both downloads the 3cap_fw.bin and 3cap_htm.bin ﬁles separately. Make sure

both ﬁles are located in the same directory before the download begins.

10 Press Enter.

11 Type y at the conﬁrmation prompt, which generates the following message:

Downloading firmware using XMODEM.

Send firmware with XMODEM now ...

12 Select Transfer from the emulation program menu bar.

13 Select Send File.

14 Click Browse to locate the ﬁle(s), 3cap_fw.bin or 3cap_htm.bin.

15 Select the XModem protocol from the drop down list.

16 Click Send. The terminal or PC displays the transfer process through a progress bar.

If you are downloading both the ﬁrmware and HTML ﬁles, the following message

is generated:

Downloading HTML file using XMODEM.

Send HTML file with XMODEM now ...

17 Repeat step 12 through step 16 to download the next ﬁle and avoid a transfer

time-out error if you are downloading both the ﬁrmware and HTML ﬁles.

The download is complete when the UI displays:

Download Successful

Updating AP

Update Successful

If the ﬁrmware update fails, the UI displays an error code indicating the cause. The

AP automatically resets after all ﬁle transfers are completed.

18 Exit the communication program to terminate the session.

19 Repeat this process for other APs in the network.

Auto Upgrade all APs

Via Messaging The Update ALL Access Points feature upgrades or downgrades the ﬁrmware of all

associated APs with the same WLAN Service Area on the same subnet and

includes all recognized hardware platforms regardless of ﬁrmware version. The

initiating AP sends the correct ﬁle name for each 3Com platform. The initiating AP

does not send update commands to non-3Com platforms.

You can ﬁnd the speciﬁc APs that have ﬁrmware upgraded or downgraded in the

Known APs window. There is a 2-second time interval between the WNMP update

ﬁrmware commands for updating each AP. This interval prevents more than one

AP from accessing the TFTP server at once and causing network congestion.

The Ethernet TFTP upgrade method requires a connection between the AP and PC

on the same Ethernet segment. Verify the PC has a TFTP server running on it.

Running the server requires third party software such as FTP PC/TCP for DOS or

OnNet™ for Windows. The wireless TFTP upgrade method requires a connection

between the AP and a TFTP server. The TFTP server can be running on a 3Com

Wireless LAN device.

NOTE: When you use Xmodem, verify the accuracy of the ﬁle name before a

send. An incorrect ﬁle can render the AP inoperable.

76 CHAPTER 6: CONFIGURING THE AP USING THE ASCII INTERFACE

Updating the ﬁrmware requires that a TFTP server be running in the background.

To update the AP ﬁrmware:

1Copy the ﬁrmware ﬁles 3cap_fw.bin and 3cap_htm.bin to the terminal or PC hard

disk.

2Telnet to the AP using its IP address.

3Type the case-sensitive password at the prompt (see “Changing the Access to the

UI” for more details). The AP generates the Main Menu.

4Select Special Functions from the Main Menu.

5Select Alter Filename(s)/HELP URL/TFTP Server and press Enter.

6Type the ﬁrmware ﬁle name in the Download Filename ﬁeld.

7Enter the TFTP Server IP address in the TFTP Server ﬁeld.

8Press Enter.

9Select Save Conﬁguration to save settings.

10 Select Special Functions from the Main Menu.

11 Select Use TFTP to Update All Access Points and press Enter, which generates the

following prompt: “Are you sure (Y/N)?”

12 Type y. The Telnet session ends at this point. The AP resets when the ﬁle transfer

and ﬂash programming complete.

13 Telnet to the AP using its IP address.

14 Type the case-sensitive password at the password prompt, which generates the

Main Menu.

15 Verify the accuracy of the version number in the System Summary window.

16 Press Ctrl+D to end the Telnet session.

Performing Pings A network node sends a ping packet to a wireless client or AP and waits for a

response. Use pings to evaluate signal strength between two stations. The other

station can exist on any AP interface. (This ping operates at the MAC level and not

at the Internet Control Message Protocol [ICMP] level.

No pings returned or fewer pings returned than sent can indicate a

communication problem between the AP and the non-network station.

To ping a station, follow the procedure below.

1Select Show Wireless Clients from the Main Menu.

2Select Regular from the Show Wireless Clients window. The Wireless Clients

window generates.

3Press Tab to highlight the MAC address of the station to ping.

4Press the [F1] key to select Ping-[F1] This generates the Packet Ping Setup window.

NOTE: Only change this ﬁle name if you are required to do so. The default ﬁle

names are 3cap_fw.bin and 3cap_htm.bin. Verify that the path to the ﬁles is

accurate. (See step one)

Mobile IP Using MD5 Authentication 77

5Enter the number of Pings (1 to 539), the Packet Length in bytes (1 to 539), and

the Packet Data content in hex (0x00 to 0xFF).

6Select Start-[CR] to begin pinging.

The AP dynamically displays ping packets transmitted and received.

Mobile IP Using MD5

Authentication You can achieve authentication by using the MD5 algorithm with a shared key

conﬁgured into the AP and its wireless client. MD5 is a message-digest algorithm

that takes an arbitrarily long message and computes a ﬁxed-length (16 bytes)

digest version of the original message. You can think of the message-digest as a

unique ﬁngerprint of the original message computed using a mathematical

formula or algorithm. The message-digest is the authentication checksum of a

message from a mobile wireless client to an AP during the Home Agent

registration process. The MD5 algorithm prevents a wireless client from

impersonating an authenticated wireless client.

Enabling or Disabling

Encryption The AP can be set for encryption of links to associated wireless clients. Any

wireless clients associated with the AP must also have encryption enabled and set

to the same level of encryption. To enable encryption in the AP, do the following:

1Select Special Functions from the Main Menu.

2Select Enabled for WEP (Privacy).

3Select 40 bit WEP Algorithm.

4Select Save to enter your selections, then answer Yes at the conﬁrmation prompt.

5Reset the AP as described below for your settings to take effect.

Encryption

Conﬁguration

Requirements

■The encryption level (open, 40-bit, or 128-bit) must be the same on the

wireless client and the access point.

■All Shared Keys on the wireless client must be the same as those on the access

point with which the client will associate. They must match exactly (key order

and hex-digit sequence).

■The selected keys do not need to be the same among different clients and/or

access points.

Saving, Resetting, and

Restoring

Conﬁgurations

This section discusses how you can save, restore, or reset your AP conﬁgurations.

Saving a Conﬁguration The AP keeps only saved conﬁguration changes after a reset. To make

conﬁguration changes permanent, save changes as needed. To save all changes,

press F1 in all conﬁguration screens that display the Save option. Otherwise,

follow the procedure below.

1Select Special Functions from the Main Menu. The Special Functions Menu is

generated.

2Select Save Conﬁguration and press Enter.

78 CHAPTER 6: CONFIGURING THE AP USING THE ASCII INTERFACE

The Save All APs function saves only the ﬁve parameters the precede it in the

Special Functions Menu. You can use this option only among the same hardware

platforms and ﬁrmware versions.

The NVRAM stores saved conﬁguration information. To clear conﬁguration

information stored in the NVRAM, see “Restoring the Default AP Conﬁguration”.

Resetting an AP Resetting an AP clears statistics and restores the last saved conﬁguration. If you

changes and do not save them, the AP clears those changes and restores the

factory defaults on reset. To reset the AP, do the following:

1Select Special Functions from the Main Menu.

2Select Reset AP. The AP LEDs ﬂash as they do when the AP powers up. The AP

returns to a STATUS-ﬂashing state.

Restoring the Default AP

Conﬁguration If an AP fails to communicate because of improper settings, restore the factory

conﬁguration defaults. Restoring the factory default settings clears all

conﬁguration and statistics for an AP.

To restore the default conﬁguration, do the following.

1Select Special Functions from the Main Menu.

2Select Restore Factory Conﬁguration.

The AP erases all user applied conﬁguration information and replaces the factory

default conﬁguration.

Saving, Resetting, and Restoring Configurations 79

7ACCESS POINT SPECIFICATIONS

Physical Characteristics

Dimensions 1.25” H x 5.5” L x 7.75” W (3.18 cm H x

14.97 cm L x 19.69 cm W)

Weight (w/power

supply) 1 lbs (0.454 kg)

Operating

Temperature -4º F to 131º F (-20º C to 55º C)

Storage

Temperature -40º F to 149º F (-40º C to 65º C)

Humidity 10% to 95% noncondensing

Shock 40 G, 11 ms, half-sine

ESD Meets CE-Mark

Drop Withstands up to a 30 in. (76 cm) drop to

concrete with possible surface marring

Radio Characteristics

Frequency No. of Channels Country

2412 11 US, Standard

2412 13 Europe

2457 2 Spain

2457 4 France

2484 1 Japan

Frequency range is country dependent, within 2400 MHz to 2500 MHz.

Output Characteristics

Range Open

environment Over 1000 ft. (303 m)

Office

environment Up to 80 ft. @ 11Mbps

Up to 120 ft. @ 5.5Mbps

Up to 200 ft. @ 2Mbps

Up to 300 ft. @ 1Mbps

TX Max. Radiated

EIRP US: FCC part 15.247; Europe: ETS 300 320;

Japan: RCR STD-33

Modulation DBPSK, DQPSK

TX Out-of-Band

Emissions US: FCC part 15.247, 15.205, 15.209;

Europe: ETS 300 320; Japan: RCR STD-33

Network Characteristics

Ethernet Frame DIX, Ethernet_II, IEEE 802.3

Filtering Packet

Rate 14,400 frames per second filtering and

forwarding

Ethernet

Connection 10Base-T (RJ-45)

Serial PC/AT serial port - DB9 Female, RS-232

using a DTE termination, 19200 bps

SNMP Version 1, MIB-II, 3Com MIB

8UPGRADING AP FIRMWARE

Wireless Clients This chapter describes how to upgrade your Access Point software.

The following procedure applies to the following operating systems:

■Windows 95B/95C,

■Windows 98/98SE

■Windows NT4 Workstation

■Windows 2000 PROFESSIONAL

AP Software Upgrade

Procedure This procedure describes how to upgrade the access point ﬁrmware using the Web

User Interface. To upgrade your ﬁrmware, you need a TFTP server and a

connection between the AP and PC on the same Ethernet segment.

The two ﬁles required for the ﬁrmware update are:

3cap_fw.bin

3cap_htm.bin

Verify that the PC has a TFTP server running on it. Running the server requires

third party software such as FTP PC/TCP for DOS or OnNet(tm) for Windows. The

wireless TFTP upgrade method requires a connection between the AP and a TFTP

server. The TFTP server can be running on a 3Com Wireless LAN device.

To update the AP ﬁrmware:

1Select Conﬁguration > Firmware. The Firmware Download page displays. The

Firmware Filename, HTML Filename, and the TFTP Server values are shown on

the screen.

2Do one of the following:

aTo update only the current AP, select either Firmware, HTML File, or both under

"Update THIS Access Point."

bTo update all APs, select either Firmware, HTML File, or both under "Update

ALL Access Points."

3Click Clear Entries to modify your entries or to discontinue the ﬁrmware upgrade.

4Select Perform Function to start the download.

ATECHNICAL SUPPORT

Online Technical

Services 3Com offers worldwide product support 24 hours a day, 7 days a week, through

the following online systems:

■World Wide Web site

■3Com FTP site

■3Com Bulletin Board Service (3Com BBS)

■3Com FactsSM automated fax service

World Wide Web Site Access the latest networking information on the 3Com Corporation World Wide

Web site by entering the URL into your Internet browser:

http://www.3com.com/

This service provides access to online support information such as technical

documentation and software library, as well as support options ranging from

technical education to maintenance and professional services.

3Com FTP Site Download drivers, patches, software, and MIBs across the Internet from the

3Com public FTP site. This service is available 24 hours a day, 7 days a week.

To connect to the 3Com FTP site, enter the following information into your

FTP client:

■Hostname: ftp.3com.com (or 192.156.136.12)

■Username: anonymous

■Password: <your Internet e-mail address>

A user name and password are not needed with Web browser software such as

Netscape Navigator and Internet Explorer.

84 APPENDIX A: TECHNICAL SUPPORT

3Com Bulletin

Board Service The 3Com BBS contains patches, software, and drivers for 3Com products. This

service is available through analog modem or digital modem (ISDN) 24 hours a

day, 7 days a week.

To reach the service by modem, set your modem to 8 data bits, no parity, and

1 stop bit. Call the telephone number nearest you:

ISDN users can dial in to the 3Com BBS using a digital modem for fast access up to

64 Kbps. To access the 3Com BBS using ISDN, use the following number:

1 847 262 6000

3Com Facts Automated

Fax Service The 3Com Facts automated fax service provides technical articles, diagrams, and

troubleshooting instructions on 3Com products 24 hours a day, 7 days a week.

Call 3Com Facts using your Touch-Tone telephone:

1 408 727 7021

Support from Your

Network Supplier If additional assistance is required, contact your network supplier. Many suppliers

are authorized 3Com service partners who are qualiﬁed to provide a variety of

services, including network planning, installation, hardware maintenance,

application training, and support services.

When you contact your network supplier for assistance, have the following

information ready:

■Product model name, part number, and serial number

■A list of system hardware and software, including revision levels

■Diagnostic error messages

■Details about recent conﬁguration changes, if applicable

If you are unable to contact your network supplier, see the following section on

how to contact 3Com.

Country Data Rate Telephone Number Country Data Rate Telephone Number

Australia Up to 14,400 bps 61 2 9955 2073 Japan Up to 14,400 bps 81 3 3345 7266

Brazil Up to 14,400 bps 55 11 5181 9666 Mexico Up to 28,800 bps 52 5 520 7835

France Up to 14,400 bps 33 1 6986 6954 P.R. of China Up to 14,400 bps 86 10 684 92351

Germany Up to 28,800 bps 4989 62732 188 Taiwan, R.O.C. Up to 14,400 bps 886 2 377 5840

Hong Kong Up to 14,400 bps 852 2537 5601 U.K. Up to 28,800 bps 44 1442 438278

Italy Up to 14,400 bps 39 2 27300680 U.S.A. Up to 53,333 bps 1 847 262 6000

Support from 3Com 85

Support from 3Com If you are unable to obtain assistance from the 3Com online technical resources or

from your network supplier, 3Com offers technical telephone support services. To

ﬁnd out more about your support options, please call the 3Com technical

telephone support phone number at the location nearest you.

When you contact 3Com for assistance, have the following information ready:

■Product model name, part number, and serial number

■A list of system hardware and software, including revision levels

■Diagnostic error messages

■Details about recent conﬁguration changes, if applicable

Below is a list of worldwide technical telephone support numbers:

Country Telephone Number Country Telephone Number

Asia Paciﬁc Rim

Australia

Hong Kong

India

Indonesia

Japan

Malaysia

New Zealand

Pakistan

Philippines

1 800 678 515

800 933 486

61 2 9937 5085

001 800 61 009

0031 61 6439

1800 801 777

0800 446 398

61 2 9937 5085

1235 61 266 2602

P.R. of China

Singapore

S. Korea

From anywhere in S. Korea:

From Seoul:

Taiwan, R.O.C.

Thailand

10800 61 00137 or

021 6350 1590

800 6161 463

82 2 3455 6455

00798 611 2230

0080 611 261

001 800 611 2000

Europe

From anywhere in Europe, call: +31 (0)30 6029900 phone

+31 (0)30 6029999 fax

From the following European countries, you may use the toll-free numbers:

Austria

Belgium

Denmark

Finland

France

Germany

Hungary

Ireland

Israel

Italy

06 607468

0800 71429

800 17309

0800 113153

0800 917959

0130 821502

00800 12813

1 800 553117

177 3103794

1678 79489

Netherlands

Norway

Poland

Portugal

South Africa

Spain

Sweden

Switzerland

U.K.

0800 0227788

800 11376

0800 3111206

05 05313416

0800 995014

900 983125

020 795482

0800 55 3072

0800 966197

Latin America

Argentina

Brazil

Chile

Colombia

AT&T +800 666 5065

0800 13 3266

1230 020 0645

98012 2127

Mexico

Peru

Puerto Rico

Venezuela

01 800 CARE (01 800 2273)

AT&T +800 666 5065

800 666 5065

AT&T +800 666 5065

North America 1 800 NET 3Com

(1 800 638 3266)

86 APPENDIX A: TECHNICAL SUPPORT

Returning Products

for Repair Before you send a product directly to 3Com for repair, you must ﬁrst obtain a

Return Materials Authorization (RMA) number. Products sent to 3Com without

RMA numbers will be returned to the sender unopened, at the sender’s expense.

To obtain an RMA number, call or fax:

Country Telephone Number Fax Number

Asia, Pacific Rim 65 543 6500 65 543 6348

Europe, South Africa, and

Middle East + 44 1442 435860 + 44 1442 435718

From the following European countries, you may call the toll-free numbers; select option 2 and

then option 2:

Austria

Belgium

Denmark

Finland

France

Germany

Hungary

Ireland

Israel

Italy

Netherlands

Norway

Poland

Portugal

South Africa

Spain

Sweden

Switzerland

U.K.

06 607468

0800 71429

800 17309

0800 113153

0800 917959

0130 821502

00800 12813

1800553117

177 3103794

1678 79489

0800 0227788

800 11376

00800 3111206

05 05313416

0800 995014

900 983125

020 795482

0800 55 3072

0800 966197

Latin America 1 408 326 2927 1 408 326 3355

U.S.A. and Canada 1 800 NET 3Com

(1 800 638 3266) 1 408 326 7120

WARRANTY AND REGULATORY COMPLIANCE

3Com Corporation Limited Warranty

This warranty applies to customers located in the United States, Australia, Canada (except Quebec), Ireland, New Zealand, U.K.,

and other English language countries, and countries for which a translation into the local language is not provided

3COM WIRELESS LAN

HARDWARE 3Com warrants to the end user (“Customer”) that this hardware product will be free from defects in workmanship and

materials, under normal use and service, for the following length of time from the date of purchase from 3Com or its

authorized reseller:

Three (3) years

Spare Parts and Spares Kits are warranted for ninety (90) days

3Com’s sole obligation under this express warranty shall be, at 3Com’s option and expense, to repair the defective product or

part, deliver to Customer an equivalent product or part to replace the defective item, or if neither of the two foregoing options

is reasonably available, 3Com may, in its sole discretion, refund to Customer the purchase price paid for the defective product.

All products that are replaced will become the property of 3Com. Replacement products or parts may be new or

reconditioned. 3Com warrants any replaced or repaired product or part for ninety (90) days from shipment, or the remainder

of the initial warranty period, whichever is longer.3Com’s sole obligation under this express warranty shall be, at 3Com’s

option and expense, to repair the defective product or part, deliver to Customer an equivalent product or part to replace the

defective item, or if neither of the two foregoing options is reasonably available, 3Com may, in its sole discretion, refund to

Customer the purchase price paid for the defective product. All products that are replaced will become the property of 3Com.

Replacement products may be new or reconditioned. 3Com warrants any replaced or repaired product or part for ninety (90)

days from shipment, or the remainder of the initial warranty period, whichever is longer.

SOFTWARE 3Com warrants to Customer that each software program licensed from it , except as noted below, will perform in substantial

conformance to its program specifications, for a period of ninety (90) days from the date of purchase from 3Com or its

authorized reseller. 3Com warrants the media containing software against failure during the warranty period. No updates are

provided. 3Com's sole obligation under this express warranty shall be, at 3Com's option and expense, to refund the purchase

price paid by Customer for any defective software product, or to replace any defective media with software which substantially

conforms to applicable 3Com published specifications. Customer assumes responsibility for the selection of the appropriate

applications program and associated reference materials. 3Com makes no warranty or representation that its software

products will meet Customer’s requirements or work in combination with any hardware or applications software products

provided by third parties, that the operation of the software products will be uninterrupted or error free, or that all defects in

the software products will be corrected. For any third party products listed in the 3Com software product documentation or

specifications as being compatible, 3Com will make reasonable efforts to provide compatibility, except where the

non-compatibility is caused by a "bug" or defect in the third party's product or from use of the software product not in

accordance with 3Com’s published specifications or user manual.

The site survey software is licensed "AS IS".

THIS 3COM PRODUCT MAY INCLUDE OR BE BUNDLED WITH (1) THIRD PARTY SOFTWARE, OR (2) 3COM SOFTWARE WHICH IS

USED WITH THE LINUX OPERATING SYSTEM, THE USE OF WHICH IS GOVERNED BY A SEPARATE END USER LICENSE

AGREEMENT. THIS 3COM WARRANTY DOES NOT APPLY TO SUCH THIRD PARTY SOFTWARE OR 3COM LINUX SOFTWARE.

FOR THE APPLICABLE WARRANTY, PLEASE REFER TO THE END USER LICENSE AGREEMENT GOVERNING THE USE OF SUCH

SOFTWARE OR THE ACCOMPANYING DOCUMENTATION RELATING TO SUCH SOFTWARE

YEAR 2000 WARRANTY In addition to the Hardware Warranty and Software Warranty stated above, 3Com warrants that each product sold or licensed

to Customer on and after January 1, 1998 that is date sensitive will continue performing properly with regard to such date data

on and after January 1, 2000, provided that all other products used by Customer in connection or combination with the 3Com

product, including hardware, software, and firmware, accurately exchange date data with the 3Com product, with the

exception of those products identified at 3Com’s Web site, http://www.3com.com/products/yr2000.html, as not meeting this

standard. If it appears that any product that is stated to meet this standard does not perform properly with regard to such date

data on and after January 1, 2000, and Customer notifies 3Com before the later of April 1, 2000, or ninety (90) days after

purchase of the product from 3Com or its authorized reseller, 3Com shall, at its option and expense, provide a software update

which would effect the proper performance of such product, repair such product, deliver to Customer an equivalent product to

replace such product, or if none of the foregoing is feasible, refund to Customer the purchase price paid for such product.

Any software update or replaced or repaired product will carry a Year 2000 Warranty for ninety (90) days after purchase or until

April 1, 2000, whichever is later.

OBTAINING WARRANTY

SERVICE Customer must contact a 3Com Corporate Service Center or an Authorized 3Com Service Center within the applicable

warranty period to obtain warranty service authorization. Dated proof of purchase from 3Com or its authorized reseller may be

required. Products returned to 3Com's Corporate Service Center must be pre-authorized by 3Com with a User Service Order

(USO) number (or a Return Material Authorization (RMA) number or a Service Repair Order (SRO) number, whichever was

issued) marked on the outside of the package, and sent prepaid and packaged appropriately for safe shipment, and it is

recommended that they be insured or sent by a method that provides for tracking of the package. Responsibility for loss or

damage does not transfer to 3Com until the returned item is received by 3Com. The repaired or replaced item will be shipped

to Customer, at 3Com's expense, not later than thirty (30) days after 3Com receives the defective product, and 3Com will

retain risk of loss or damage until the item is delivered to Customer.

3Com shall not be responsible for any software, firmware, information, or memory data of Customer contained in, stored on,

or integrated with any products returned to 3Com for repair, whether under warranty or not.

Dead- or Defective-on-Arrival. In the event a product completely fails to function or exhibits a defect in materials or

workmanship within the first forty-eight (48) hours of installation but no later than thirty (30) days after the date of purchase,

and this is verified by 3Com, it will be considered dead- or defective-on-arrival (DOA) and a replacement shall be provided by

advance replacement, but only if Customer provides a purchase order number, credit card number, or other method of

payment acceptable to 3Com, to be used if 3Com needs to charge Customer for the replacement, as explained below. The

replacement product will normally be shipped not later than three (3) business days after 3Com’s verification of the DOA

product, but may be delayed due to export or import procedures. The shipment of advance replacement products is subject to

local legal requirements and may not be available in all locations. When an advance replacement is provided and Customer

fails to return the original product to 3Com within fifteen (15) days after shipment of the replacement, 3Com will charge

Customer for the replacement product, at list price.

INCLUDED SERVICES: Telephone Support, with coverage for basic troubleshooting only, will be provided for ninety (90) days

from the date of purchase, on a commercially reasonable efforts basis. Telephone support is available from 3Com only if

Customer purchased this product directly from 3Com, or if Customer’s reseller is unable to provide telephone support. Please

refer to the Technical Support appendix in the User Guide for telephone numbers.

WARRANTIES EXCLUSIVE IF A 3COM PRODUCT DOES NOT OPERATE AS WARRANTED ABOVE, CUSTOMER'S SOLE REMEDY FOR BREACH OF THAT

WARRANTY SHALL BE REPAIR, REPLACEMENT, OR REFUND OF THE PURCHASE PRICE PAID, AT 3COM'S OPTION. TO THE FULL

EXTENT ALLOWED BY LAW, THE FOREGOING WARRANTIES AND REMEDIES ARE EXCLUSIVE AND ARE IN LIEU OF ALL OTHER

WARRANTIES, TERMS, OR CONDITIONS, EXPRESS OR IMPLIED, EITHER IN FACT OR BY OPERATION OF LAW, STATUTORY OR

OTHERWISE, INCLUDING WARRANTIES, TERMS, OR CONDITIONS OF MERCHANTABILITY, FITNESS FOR A PARTICULAR

PURPOSE, SATISFACTORY QUALITY, CORRESPONDENCE WITH DESCRIPTION, AND NON-INFRINGEMENT, ALL OF WHICH ARE

EXPRESSLY DISCLAIMED. 3COM NEITHER ASSUMES NOR AUTHORIZES ANY OTHER PERSON TO ASSUME FOR IT ANY OTHER

LIABILITY IN CONNECTION WITH THE SALE, INSTALLATION, MAINTENANCE OR USE OF ITS PRODUCTS.

3COM SHALL NOT BE LIABLE UNDER THIS WARRANTY IF ITS TESTING AND EXAMINATION DISCLOSE THAT THE ALLEGED

DEFECT OR MALFUNCTION IN THE PRODUCT DOES NOT EXIST OR WAS CAUSED BY CUSTOMER'S OR ANY THIRD PERSON'S

MISUSE, NEGLECT, IMPROPER INSTALLATION OR TESTING, UNAUTHORIZED ATTEMPTS TO OPEN, REPAIR OR MODIFY THE

PRODUCT, OR ANY OTHER CAUSE BEYOND THE RANGE OF THE INTENDED USE, OR BY ACCIDENT, FIRE, LIGHTNING, POWER

CUTS OR OUTAGES, OTHER HAZARDS, OR ACTS OF GOD.

LIMITATION OF LIABILITY TO THE FULL EXTENT ALLOWED BY LAW, 3COM ALSO EXCLUDES FOR ITSELF AND ITS SUPPLIERS ANY LIABILITY, WHETHER

BASED IN CONTRACT OR TORT (INCLUDING NEGLIGENCE), FOR INCIDENTAL, CONSEQUENTIAL, INDIRECT, SPECIAL, OR

PUNITIVE DAMAGES OF ANY KIND, OR FOR LOSS OF REVENUE OR PROFITS, LOSS OF BUSINESS, LOSS OF INFORMATION OR

DATA, OR OTHER FINANCIAL LOSS ARISING OUT OF OR IN CONNECTION WITH THE SALE, INSTALLATION, MAINTENANCE,

USE, PERFORMANCE, FAILURE, OR INTERRUPTION OF ITS PRODUCTS, EVEN IF 3COM OR ITS AUTHORIZED RESELLER HAS BEEN

ADVISED OF THE POSSIBILITY OF SUCH DAMAGES, AND LIMITS ITS LIABILITY TO REPAIR, REPLACEMENT, OR REFUND OF THE

PURCHASE PRICE PAID, AT 3COM'S OPTION. THIS DISCLAIMER OF LIABILITY FOR DAMAGES WILL NOT BE AFFECTED IF ANY

REMEDY PROVIDED HEREIN SHALL FAIL OF ITS ESSENTIAL PURPOSE.

DISCLAIMER Some countries, states, or provinces do not allow the exclusion or limitation of implied warranties or the limitation of incidental

or consequential damages for certain products supplied to consumers, or the limitation of liability for personal injury, so the

above limitations and exclusions may be limited in their application to you. When the implied warranties are not allowed to be

excluded in their entirety, they will be limited to the duration of the applicable written warranty. This warranty gives you

specific legal rights which may vary depending on local law.

GOVERNING LAW This Limited Warranty shall be governed by the laws of the State of California, U.S.A. excluding its conflicts of laws principles

and excluding the United Nations Convention on Contracts for the International Sale of Goods.

3Com Corporation

5400 Bayfront Plaza

Santa Clara, CA 95054

(408) 326-5000

January 3, 2000

Regulatory Compliance Information

RADIO FREQUENCY

INTERFERENCE REQUIREMENTS This device has been tested and found to comply with the limits for a Class A digital device pursuant to Part 15 of the Federal

Communications Commissions Rules and Regulation. These limits are designed to provide reasonable protection against

harmful interference when the equipment is operated in a commercial environment. This equipment 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 equipment 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.

However, there is no guarantee that interference will not occur in a particular installation. If the 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:

■Re-orient 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 which the receiver is connected.

■Consult the dealer or an experienced radio/TV technician for help.

CANADA This Class A digital apparatus meets the requirements of the Canadian Interference-Causing Equipment Regulations.

CE MARKING AND EUROPEAN

UNION COMPLIANCE Products intended for sale within the European Union are marked with the CEMark which indicates compliance to applicable

Directives and European Normes (EN), as follows. Amendments to these Directives or ENs are included: Normes (EN), as follows.

Applicable Directives:

■Electromagnetic Compatibility Directive 89/336/EEC

■Low Voltage Directive 73/23/EEC

Applicable Standards:

■EN 55 022 - Limits and Methods of Measurement of Radio Interference Characteristics of Information technology Equipment

■EN 50 082-1 - Electromagnetic Compatibility - Generic Immunity Standard, Part 1: Residential, commercial, Light Industry

■IEC 801.2 - Electromagnetic Compatibility for Industrial Process Measurement and Control Equipment Part 2: Electrostatic

Discharge Requirements

■IEC 801.3 - Electromagnetic Compatibility for Industrial Process Measurement and Control Equipment Part 3: Radiated

Electromagnetic Field Requirements

■IEC 801.4 - Electromagnetic Compatibility for Industrial Process Measurement and Control Equipment Part 4: Electrical Fast

Transients Requirements

■EN 60 950 + Amd 1 + Amd 2 - Safety of Information Technology Equipment Including Electrical Business Equipment

■EN 60 825-1 (EN 60 825) - Safety of Devices Containing Lasers

3Com End User Software License Agreement

IMPORTANT: Read Before Using This Product

YOU SHOULD CAREFULLY READ THE FOLLOWING TERMS AND CONDITIONS BEFORE USING THIS PRODUCT. IT

CONTAINS SOFTWARE, THE USE OF WHICH IS LICENSED BY 3COM CORPORATION (“3COM”) TO ITS CUSTOMERS FOR

THEIR USE ONLY AS SET FORTH BELOW. IF YOU DO NOT AGREE TO THE TERMS AND CONDITIONS OF THIS

AGREEMENT, DO NOT USE THE SOFTWARE. USING ANY PART OF THE SOFTWARE INDICATES THAT YOU ACCEPT

THESE TERMS.

LICENSE: 3Com grants you a nonexclusive license to use the accompanying software program(s) (the “Software”) subject to

the terms and restrictions set forth in this License Agreement. You are not permitted to lease, rent, distribute or sublicense the

Software or to use the Software in a time-sharing arrangement or in any other unauthorized manner. Further, no license is

granted to you in the human readable code of the Software (source code). Except as provided below, this License Agreement

does not grant you any rights to patents, copyrights, trade secrets, trademarks, or any other rights in respect to the Software.

The Software is licensed to be used on any workstation or any network server owned by or leased to you, provided that the

Software is used only in connection with a 3Com adapter. You may reproduce and provide one (1) copy of the Software and

supporting documentation for each such workstation or network server on which the Software is used as permitted hereunder.

Otherwise, the Software and supporting documentation may be copied only as essential for backup or archive purposes in

support of your use of the Software as permitted hereunder. You must reproduce and include all copyright notices and any

other proprietary rights notices appearing on the Software and the supporting documentation on any copies that you make.

NO ASSIGNMENT; NO REVERSE ENGINEERING: You may not transfer or assign the Software and/or this License Agreement

to another party without the prior written consent of 3Com. If such consent is given and you transfer or assign the Software

and/or this License Agreement, then you must at the same time either transfer any copies of the Software as well as the

supporting documentation to the same party or destroy any such materials not transferred. Except as set forth above, you may

not transfer or assign the Software or your rights under this License Agreement.

Modification, reverse engineering, reverse compiling, or disassembly of the Software is expressly prohibited. However, if you

are a European Community (“EC”) resident, information necessary to achieve interoperability of the Software with other

programs within the meaning of the EC Directive on the Legal Protection of Computer Programs is available to you from 3Com

upon written request.

EXPORT RESTRICTIONS: You agree that you will not export or re-export the Software or accompanying documentation (or

any copies thereof) or any products utilizing the Software or such documentation in violation of any applicable laws or

regulations of the United States and the country in which you obtained them.

The 3Com product and/or software covered by this agreement may contain encryption code which is unlawful to export from

the US or Canada without an approved US Department of Commerce export licens. You agree that you will not export,

reexport, either physically or electronically, any encrypted product without an approved export license.

TRADE SECRETS; TITLE: You acknowledge and agree that the structure, sequence and organization of the Software are the

valuable trade secrets of 3Com and its suppliers. You agree to hold such trade secrets in confidence. You further acknowledge

and agree that ownership of, and title to, the Software and all subsequent copies thereof regardless of the form or media are

held by 3Com and its suppliers.

UNITED STATES GOVERNMENT LEGEND: All technical data and computer software are commercial in nature and developed

solely at private expense. The Software is delivered as “Commercial Computer Software” as defined in DFARS 252.227-7014

(June 1995) or as a “commercial item” as defined in FAR 2.101(a) and as such is provided with only such rights as are provided

in this License Agreement, which is 3Com’s standard commercial license for the Software. Technical data is provided with

limited rights only as provided in DFAR 252.227-7015 (Nov. 1995) or FAR 52.227-14 (June 1987), whichever is applicable. You

agree not to remove or deface any portion of any legend provided on any licensed program or documentation delivered to you

under this License Agreement.

TERM AND TERMINATION: This license will expire fifty (50) years from the date that you first use the Software, if it is not

earlier terminated. You may terminate it at any time by destroying the Software and documentation together with all copies

and merged portions in any form. It will also terminate immediately if you fail to comply with any term or condition of this

License Agreement. Upon such termination you agree to destroy the Software and documentation, together with all copies and

merged portions in any form.

GOVERNING LAW: This License Agreement shall be governed by the laws of the State of California as such laws are applied to

agreements entered into and to be performed entirely within California between California residents and by the laws of the

United States. You agree that the United Nations Convention on Contracts for the International Sale of Goods (1980) is hereby

excluded in its entirety from application to this License Agreement.

LIMITED WARRANTY; LIMITATION OF LIABILITY: All warranties and limitations of liability applicable to the Software are as

stated on the Limited Warranty Card or in the product manual, whether in paper or electronic form, accompanying the

Software. Such warranties and limitations of liability are incorporated herein in their entirety by this reference.

SEVERABILITY: In the event any provision of this License Agreement is found to be invalid, illegal or unenforceable, the

validity, legality and enforceability of any of the remaining provisions shall not in any way be affected or impaired and a valid,

legal and enforceable provision of similar intent and economic impact shall be substituted therefor.

ENTIRE AGREEMENT: This License Agreement sets forth the entire understanding and agreement between you and 3Com,

supersedes all prior agreements, whether written or oral, with respect to the Software, and may be amended only in a writing

signed by both parties.

3Com is a registered trademark of 3Com Corporation.

3Com Corporation, 5400 Bayfront Plaza, P.O. Box 58145, Santa Clara, CA 95052-8145. (408) 326-5000

3Com SRWL306 Wireless LAN Access Point, WL-306 User Manual SpeedRacerAccessPoint

3Com Corporation Wireless LAN Access Point, WL-306 SpeedRacerAccessPoint

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