3Com Wireless LAN 11 Mbps Bedienungsanleitung

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11 Mbps Wireless LAN

Access Point 8000

User Guide

Version 1.1

Published April, 2002

Version 1.1.2

3Com Corporation

5400 Bayfront Plaza

Santa Clara, California

95052-8145

reproduced in any form or by any means or used to make any derivative work (such as translation,

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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 as a “commercial item” as deﬁned in FAR 2.101(a) and as such is provided with only such rights as are

provided in 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 contained in, or delivered to you in conjunction with, this User Guide.

Unless otherwise indicated, 3Com registered trademarks are registered in the United States and may or may

not be registered in other countries.

3Com and the 3Com logo are registered trademarks and AirConnect is a trademark of 3Com Corporation.

Wi-Fi is a trademark of the Wireless Ethernet Compatibility Alliance.

All other company and product names may be trademarks of the respective companies with which they

are associated.

EXPORT RESTRICTIONS:

This product contains Encryption and may require US and/or Local Government

authorization prior to export or import to another country.

ONTENTS

NTRODUCTION

Wireless and Wired Networks 1

Access Point 8000 Feature Summary 1

Installation Overview 2

NSTALLING

THE

CCESS

OINT

Before You Begin 5

Deciding Where to Place Equipment 5

Connecting the Standard Antenna 6

Placing the Access Point 6

Mounting on a Wall 7

Mounting on a Ceiling 8

Connecting Power 9

Connecting to an Ethernet Network 10

Checking the LEDs 10

Selecting A Different Antenna 11

Omnidirectional Antenna 11

Ceiling Mount Omnidirectional Antenna 12

Ceiling Mount Hallway Antenna 12

Directional Panel Antenna 13

Connecting an Optional Antenna 13

Installing Software Utilities 14

CCESS

OINT

ECURITY

Upper-Layer Authentication 17

EAP-MD5 17

EAP-TLS 17

3Com Serial Authentication 18

Additional Security Conﬁguration Options 18

802.1x RADIUS Support 19

Using the Wireless 802.1x Agent 19

Authentication and Login 19

802.1x Client Properties 20

ONFIGURING

THE

CCESS

OINT

8000

Installing the Device Manager 23

Launching a Wireless Device Conﬁguration 24

Using the Conﬁguration Management System 25

Changing Access Point Properties 26

Setting Network Properties 26

Setting Data Transmission Properties 27

Setting Advanced Data Transmission Properties 28

Setting up Security 29

Security Settings 29

Access Point Encryption Settings 30

Setting up a User Access List 30

Setting up a MAC Address Access List 31

Deﬁning RADIUS Servers 31

Conﬁguring for SNMP Management 31

Deﬁning a TFTP Server 32

Setting up a System Log 32

Upgrading the System 32

Changing the Administration Password 33

Restoring Factory Defaults 33

Resetting the Access Point 33

Backing up Conﬁgurations 33

Restoring Conﬁgurations 33

Viewing Statistics 34

Viewing System Status 35

ONDUCTING

ITE

URVEY

Before You Begin 37

Choosing Trial Locations 37

Environmental Requirements 37

Electrical Requirements 38

Summary of the Survey Procedure 38

Using the Site Survey Tool 39

Setting up Equipment 39

Launching the Tool 39

Conﬁguring the Survey 39

Running the Tests 39

Interpreting Test Results 40

Site Survey Menus 41

ROUBLESHOOTING

ECHNICAL

UPPORT

Online Technical Services 45

World Wide Web Site 45

3Com Knowledgebase Web Services 45

3Com FTP Site 45

Support from Your Network Supplier 46

Support from 3Com 46

Returning Products for Repair 48

EGULATORY

OMPLIANCE

NFORMATION

NDEX

NTRODUCTION

The 3Com wireless product family lets you set up a local area network (LAN)

without the restraints of network cabling. If your ofﬁce already has an Ethernet

LAN, the 3Com 11 Mbps Wireless LAN Access Point 8000 can extend the network

without additional cabling. The access point security features extend the security

of installed wired networks to include all wireless components.

The type of network you conﬁgure depends on the size of your ofﬁce and whether

you require a connection to a wired LAN. A simple conﬁguration consists of an

access point and several clients. The clients can associate with the wireless

network anywhere within the coverage area of the access point.

For more complex requirements, you can conﬁgure several access points as

separate networks at the same site. The access points use different network

identiﬁers called wireless LAN service areas (WLAN service areas) or Extended

Service Set Identities (ESSID). Client computers can roam within the coverage areas

of access points in the same segment with the same WLAN service areas.

Wireless and Wired

Networks

An access point can be connected to a wired LAN by an Ethernet cable acting as a

bridge between the wired and wireless networks. In this conﬁguration, the access

point provides the link between the wired network and wireless clients. Clients

can move freely throughout the service area of the access point and remain

associated with the larger network, allowing client access to the full range of

network services.

For complete wireless coverage, several access points can be connected to an

existing LAN. Wireless clients can roam freely between different access points with

the same WLAN service areas and remain associated with the larger network.

Access Point 8000

Feature Summary

Clear channel select When initializing, automatically scans the frequency spectrum and

selects the channel with the least interference.

Power over Ethernet Powered over the Ethernet cable to reduce the number of cables

and simplify installation.

Access point discovery Clients and network administrators can discover access points and

ESSIDs within the same network segment. The network

administrator can also discover, manage, and upgrade access

points across routers by means of the 3Com Network Supervisor

(3NS).

Rate control Rate Control options available in the access point to select

Optional, Required, or Not Used.

Transmit power control Adjustable power level from minimum to maximum to extend

transmission range.

Roaming within segments Allows client to roam between access points within the same

segment.

HAPTER

1: I

NTRODUCTION

Installation Overview

Choose the best place for the installation (ﬂat surface, wall, or acoustical ceiling).

Look for a location away from equipment that might cause radio interference. The

site should be elevated and centrally located relative to the users on your wireless

network.

Make sure that you are familiar with the following items and have them available

where required for your installation:

■

Access point

■

3Com Integrated Power-over-Ethernet power supply and power cord

■

Standard category 5 straight-through (8-wire) Ethernet cable

■

Mounting hardware (for wall- or ceiling-mount installations)

It may be useful for you to conduct a site survey before permanently installing the

access point. See “Conducting a Site Survey” on page 37.

Install the access point following the steps outlined in “Installing the Access Point”

on page 5.

For information on improving the signal between the access point and a wireless

client, see “Selecting A Different Antenna” on page 11.

User support Supports up to 256 simultaneous users, regardless of mode of

operation.

DHCP support Uses DHCP to obtain a leased IP address and network

configuration information from a server. If the network has no

DHCP server, the access point’s internal DHCP server assigns IP

addresses to wireless clients in a stand-alone wireless network.

SNMP and MIB interfaces SNMP, HP OpenView, and 3Com Network Supervisor (3NS).

Authentication features Supports RADIUS authentication between the wireless client and

the RADIUS servers, in conjunction with the IEEE 802.1x. For Serial

Authentication, requires the 3Com 3CRWE62092A wireless LAN

PC card upgraded with the latest firmware.

Supports client authentication by MAC address list on access point

or on RADIUS server.

802.1x Support Port-based network access control utilizes the physical

characteristics of the switched LAN infrastructures to authenticate

devices attached to a LAN port, and prevent access to that port in

cases where the authentication process fails.

Encryption Supports 40-bit and 128-bit shared encryption, and 128-bit

dynamic encryption key. Compatible with Cisco and Agere/Lucent

access points and clients. Also supports 3Com Dynamic Security

Link 128-bit dynamic encryption key.

Management tools Web server in the access point supports device configuration and

management through your web browser. Access point software

tools run under Windows 98, 98 SE, Me, 2000, and XP; Windows

NT 4.0 with Service Pack 6 or higher;. The 3Com Network

Supervisor discovers and displays a map of all Wireless Clients

within a segment. Built-in Web server simplifies firmware

upgrades. Web-based interface is compatible with Internet

Explorer 5.0 or greater and Netscape Communicator 6.0 or

greater.

Privacy Mode Broadcasting of ESSID can be disabled.

Client-to-client blocking Prevents communication among associated clients, providing client

privacy in public access situations.

Installation Overview

After hardware installation is complete, install the access point tools, utilities, and

user guide from the installation CD. See “Installing Software Utilities” on page 14.

To set up a wireless client to authenticate through the access point to your RADIUS

server, refer to “Using the Wireless 802.1x Agent” on page 19.

To set access point security or conﬁgure the wireless network, refer to

“Conﬁguring the Access Point 8000” on page 23.

Review the system settings and ensure they are suitable for your site.

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