3Com 8000 Manuel utilisateur

http://www.3com.com/

http://support.3com.com/registration/frontpg.pl/

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Version 1.0

Published January, 2002

Version 1.0

3Com Corporation

5400 Bayfront Plaza

Santa Clara, California

95052-8145

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

adaptation) without written permission from 3Com Corporation.

3Com Corporation reserves the right to revise this documentation and to make changes in content from time

to time without obligation on the part of 3Com Corporation to provide notification of such revision or change.

3Com Corporation provides this documentation without warranty, term, or condition of any kind, either

implied or expressed, including, but not limited to, the implied warranties, terms or conditions of

merchantability, satisfactory quality, and fitness for a particular purpose. 3Com may make improvements or

changes in the product(s) and/or the program(s) described in this documentation at any time.

If there is any software on removable media described in this documentation, it is furnished under a license

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please contact 3Com and a copy will be provided to you.

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 FAR2. 1 01(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 AirConnect are registered trademarks and the 3Com logo is a trademark of 3ComCorporation.

Microsoft, Windows, and Windows NT are registered trademarks of Microsoft Corporation.

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

are associated.

EXPORT RESTRICTIONS:

This product or software contains encryption code which may not be exported or

transferred from the US or Canada without an approved US Department of Commerce export license.

ONTENTS

NTRODUCTION

Setting up a Wireless Network 1

Wireless and Wired Networks 1

Network Security and RADIUS Support 1

AP8000 Feature Summary 2

Installation Overview 3

Software Utilities 4

NSTALLING THE

CCESS

OINT

Before You Begin 5

Deciding Where to Place Equipment 6

Connecting the Standard Antenna 6

Placing the Access Point 7

Mounting on a Wall 7

Mounting on a Ceiling 8

Connecting Power 9

Connecting to an Ethernet Network 10

Checking the LEDs 10

Antenna Options 11

Omnidirectional Antenna 11

Ceiling Mount Omnidirectional Antenna 11

Ceiling Mount Hallway Antenna 12

Directional Panel Antenna 12

Connecting an Optional Antenna 13

CCESS

OINT

ECURITY

Security Configuration Options 15

Using the Wireless 802.1X Agent 16

Authentication and Login 16

802.1x Client Properties 17

ANAGING THE

IRELESS

LAN

Overview 19

Starting the Device Manager 19

Selecting a Device 19

The Pre-IP Configuration Wizard 20

Installing the Management Device on a Computer 21

Using the Configuration Management System 21

System Configuration 21

Access Point Properties 22

Network Properties 22

Data Transmission Properties 23

Security 24

AP Encryption 24

User Access List 25

RADIUS Authentication and Accounting 26

Management 26

SNMP Management 26

TFTP Setup 26

System Log Setup 26

Tools 27

Upgrade System 27

Downloading Upgrade Files 27

Installing an Upgrade 27

Change Administration Password 27

Configuration Backups 28

Statistics 28

System Status 29

Restoring an Access Point to Factory Defaults 29

Interoperating with Third-Party Equipment 29

ONDUCTING A

ITE

URVEY

Choosing Trial Locations 31

Environmental Requirements 31

Electrical Requirements 32

Summary of the Survey Procedure 32

Using the Site Survey Tool 32

Setting up Equipment 33

Launching the Tool 33

Configuring the Site Survey 33

Running the Tests 33

Interpreting Test Results 35

Site Survey Menus 36

ROUBLESHOOTING

ECHNICAL

UPPORT

Online Technical Services 39

World Wide Web Site 39

3Com Knowledgebase Web Services 39

3Com FTP Site 39

Support fromYour Network Supplier 40

Support from 3Com 40

NDEX

EGULATORY

OMPLIANCE

NFORMATION

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 will also extend the

security of installed wired networks to include all wireless components.

Setting up a Wireless

Network

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 that have 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.

Network Security and

RADIUS Support

The Access Point 8000 provides a multiple-layer security solution, supporting the

IEEE 802.1x, Remote Access Dial-In User Service (RADIUS) Authentication, and the

Extensible Authentication Protocol (EAP). If you do not have a centralized RADIUS

server, the access points Dynamic Security Link manages network login. The

access points internal data base supports up to 1000 users.

HAPTER

1: I

NTRODUCTION

The security configuration options include:

AP8000 Feature

Summary

Authentication Encryption Description

802.11 standard

Open No encryption Basic area network name with no encryption.

802.11 standard

40-bit shared key 40-bit shared key Standard WiFi Requirement to insure

interoperability.

802.11 standard

128-bit shared key 128-bit shared key Strong encryption. Compatible with other

vendors' 128-bit shared key scheme including

AirConnect, Agere, and Cisco.

Dynamic Security Link

128-bit dynamic key 128-bit dynamic key 3Com proprietary scheme to enable user-level

authentication with 128-bit dynamic per user,

per session key.

802.1x/RADIUS

Authentication

(EAP-MD5)

No encryption

40-bit shared key

128-bit shared key

RADIUS authentication using the MD5

authentication method (username- and

password-based) and access point encryption.

802.1x/RADIUS

Authentication

(EAP-TLS)

40-bit dynamic key

128-bit dynamic key Certificate-based mutual RADIUS

authentication with 40 and128-bit Dynamic

encryption key.

802.1x/RADIUS

Serial Authentication

(EAP-TLS, EAP-MD5)

40-bit dynamic key

128-bit dynamic key Mutual RADIUS authentication

implementation base on proposed IEEE draft.

Uses 3Com Universal Client Certificate to

allow client and RADIUS to mutually

authenticate (EAP-TLS) and perform User

authentication (EAP-MD5).

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.

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.

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 clients in a stand-alone wireless network.

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

Support for multiple

access points Simultaneous setup and configuration of multiple access points, as

well as simultaneous upgrades.

Bulk configuration and profile download capability.

Authentication features Supports RADIUS authentication between the wireless client and

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

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 (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 31.

Install the access point following the steps outlined in Installing the Access Point

on page 5.

Connect the access point to the power supply and connect the power supply to a

power source. (If you use your own power-over-Ethernet hub or switch, ensure

that your equipment also complies with the IEEE 802.3af standard.)

If you are linking your wireless network to your wired Ethernet network, run an

Ethernet segment from the To Hub/Switch port on the power brick to a LAN port.

(Be sure you do not connect the Ethernet segment to the port labeled To Access

Point. Doing so may damage network components.)

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

user guide from the installation CD.

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

the Wireless LAN on page19.

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 page16.

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

client, see Antenna Options on page 11.

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, Microsoft

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

management through your web browser. Access point software

tools run under Windows 95, 98, 98se, Me, WinNT 4.0 SP4 or

above, Windows 2000, and Windows XP. 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 requires Java script support and so

is compatible with Internet Explorer 5.0 or greater and Netscape

Communicator 6.0 or greater.

HAPTER

1: I

NTRODUCTION

Software Utilities

The 3Com Administrator Utilities CD includes tools and utilities to help you set up

and administer the wireless components of your network. Software tools and

utilities are presented as Tools and Utilities options on the main menu of the CD

and include:

■

Install the Utility Software and Documentation.

This option installs the

Wireless Infrastructure Device Manager Tool which you can use to monitor

access points and select devices for administrative changes. It also installs the

Site Survey Tool and product documentation in other languages as translations

become available.

■

Install TFTP Server Tool.

A TFTP server is required for firmware upgrades and

for backing up and restoring access point configuration files. This option

launches 3CDaemon, which installs a TFTP server for you. You do not have to

select this option if you already have a TFTP server set up.

■

Install 802.1x Client Tool.

This option installs the Wireless Authentication

Agent for 802.1x support. If you will be using the access point in conjunction

with a RADIUS authentication server, you must install this agent on each

wireless client PC in the network. On systems running Windows XP this agent

is not required because 802.1x support is built into the operating system.

■

Install the 3Com Network Supervisor.

The 3Com Network Supervisor is a

centralized network management software program. It is not required for

managing access points. It is included for sites that require centralized network

management and are not already using an SNMP-based tool.

■

Install the 3Com Network Supervisor Service Pack 2.

This is an upgrade

package for the 3Com Network Supervisor. You should install the service pack

only after installing the 3Com Network Supervisor.

■

Install Adobe Acrobat Reader.

For users who do not already have Acrobat

Reader for viewing the PDF documentation, a current version is included on the

CD.

■

Install Internet Explorer 5.5.

For users who do not already have a browser

that supports the HTML version 4 (required for the Configuration Management

System user interface), a current version of Internet Explorer is included on the

CD. If you need to change or upgrade to a browser that supports the HTML

version 4 interface of the Configuration Management System, you can install

this software.

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