User guide | 3Com WL-455 Network Card User Manual

User Guide
Wireless LAN Access Point 7250
3CRWE725075
(Model WL-455)
http://www.3com.com/
http://www.3com.com/support/en_US/productreg/frontpg.html/
Published December, 2003
3Com Corporation
350 Campus Drive
Marlborough, MA
01752-3064
Copyright © 2003 3Com Corporation. All rights reserved. No part of this documentation may be
reproduced 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.
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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
(November 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, the 3Com logo, and SuperStack are registered trademarks 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.
Contents
INTRODUCTION
Product Features - - - - - - - - - - - - - - - - - - - - Security - - - - - - - - - - - - - - - - - - - - - - Performance and Reliability - - - - - - - - - - - - - Manageability - - - - - - - - - - - - - - - - - - - Wireless Network Standard - - - - - - - - - - - - - - - Far-Reaching 802.11g- - - - - - - - - - - - - - - - Network Configuration and Planning - - - - - - - - - - Ad Hoc Wireless LAN - - - - - - - - - - - - - - - Infrastructure Wireless LAN- - - - - - - - - - - - - Infrastructure Wireless LAN for Roaming Wireless PCs
Terminology - - - - - - - - - - - - - - - - - - - - - - -
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Installation Requirements - - - - - - - - - - - - - - - - - - - - Power Requirements - - - - - - - - - - - - - - - - - - - - - - Safety Information - - - - - - - - - - - - - - - - - - - - - - - Deciding Where to Place Equipment and Performing A Site SurveyBefore You Begin - - - - - - - - - - - - - - - - - - - - - - - Connecting the Standard Antennas - - - - - - - - - - - - - - - Connecting Power - - - - - - - - - - - - - - - - - - - - - - - Using The Included AC Adapter- - - - - - - - - - - - - - - Using An Optional Power-Over-Ethernet Injector- - - - - - - Using a Power-Over-Ethernet LAN Port - - - - - - - - - - - Checking the LEDs- - - - - - - - - - - - - - - - - - - - - - - Mounting on a Wall - - - - - - - - - - - - - - - - - - - - - - Flat Surface Installation - - - - - - - - - - - - - - - - - - - - Selecting and Connecting a Different Antenna Model - - - - - - Power Settings on the Access Point for External antennas - - - - Installing Software Utilities - - - - - - - - - - - - - - - - - - - -
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Using the 3Com Wireless Device Manager - - - - - - - - - - - - - - - - - - - - - - - - - - - Launching a Wireless Device Configuration - - - - - - - - - - - - - - - - - - - - - - - - - Using the Pre-IP Configuration Wizard - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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INSTALLING THE ACCESS POINT
SYSTEM CONFIGURATION
Configuration Login - - - - - - - - - - - - - - - - - - - - - - Setting the Country Code - - - - - - - - - - - - - - - - - - - - Basic Setup - - - - - - - - - - - - - - - - - - - - - - - - - - Advanced Setup - - - - - - - - - - - - - - - - - - - - - - - - Identification- - - - - - - - - - - - - - - - - - - - - - - - - - TCP/IP Settings - - - - - - - - - - - - - - - - - - - - - - - - DHCP Client - - - - - - - - - - - - - - - - - - - - - - - - Secure Web Server Connection - - - - - - - - - - - - - - - RADIUS- - - - - - - - - - - - - - - - - - - - - - - - - - - - Authentication - - - - - - - - - - - - - - - - - - - - - - - - - Filter Control - - - - - - - - - - - - - - - - - - - - - - - - - Filtering by VLAN - - - - - - - - - - - - - - - - - - - - - Security Filters - - - - - - - - - - - - - - - - - - - - - - - Client List Timeout - - - - - - - - - - - - - - - - - - - - - Uplink Port MAC Address Filtering - - - - - - - - - - - - - Filtering by Ethernet Protocol Type - - - - - - - - - - - - - SNMP - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Administration - - - - - - - - - - - - - - - - - - - - - - - - - System Log - - - - - - - - - - - - - - - - - - - - - - - - - - Status - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Radio Interface- - - - - - - - - - - - - - - - - - - - - - - - - Radio Settings - - - - - - - - - - - - - - - - - - - - - - - - - Security - - - - - - - - - - - - - - - - - - - - - - - - - - - - Configuring Authentication - - - - - - - - - - - - - - - - - Configuring Encryption - - - - - - - - - - - - - - - - - - - WPA Configuration - - - - - - - - - - - - - - - - - - - WEP Configuration - - - - - - - - - - - - - - - - - - - How to setup the access point for RADIUS authentication - - - - How to setup the access point for WPA with 802.1x Session keys - How to setup the access point for WPA with Pre-Shared (PSK) Key
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Troubleshooting Table - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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TROUBLESHOOTING
TECHNICAL SUPPORT
Obtaining Support for your Product - - - - - - - Register Your Product to Gain Service BenefitsPurchase Value-Added Services - - - - - - - Where To Go For Help - - - - - - - - - - - Troubleshoot Online - - - - - - - - - - - - Access Software Downloads - - - - - - - - Contact Us - - - - - - - - - - - - - - - - - Telephone Technical Support and Repair - - - -
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REGULATORY COMPLIANCE INFORMATION
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1
INTRODUCTION
The 3Com® Wireless LAN Access Point 7250 supports 802.11g and 802.11b wireless
users.
With their flexibility and unfettered access, wireless LANs are changing the way
people work. Now with 3Com’s enterprise-class wireless access points, you can build
a cost-effective, reliable, secure wireless network that provides users with seamless
connectivity to the Internet, company intranet, and the wired corporate network from
anywhere they happen to be—conference room, cafeteria or office.
Industry-leading security features and comprehensive management and performance
features combine to make these enterprise class wireless access points an ideal choice
for organizations ready to serve their increasingly mobile workforce.
PRODUCT FEATURES
Access Point 7250—The single wireless interface 802.11g 2.4 GHz, 54-Mbps access
point creates an enterprise-class wireless LAN supporting up to 250 simultaneous
users.
SECURITY
3Com offers one of the most robust suite of standards-based security on the market
today. To protect sensitive data broadcast over the wireless LAN, 3Com supports
Wireless Equivalent Privacy (WEP) RC4 40/ 64-bit, 128-bit and 152-bit shared-key
encryption. 3Com strengthens this basic security mechanism with additional security
features, including MAC address access control lists, IEEE 802.1x per-port user
authentication with RADIUS server authentication support, Temporal Key Integrity
Protocol (TKIP), Advanced Encryption Standard (AES), Wireless Protected Access
(WPA) and Extensible Authentication Protocol (EAP) support: EAP-MD5, EAP-TLS,
EAP-TTLS, and PEAP.
In addition to standards-based security, 3Com 128-bit Dynamic Security Link offers a
high level of security, requiring a user name and password to access the wireless LAN.
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PERFORMANCE AND RELIABILITY
3Com wireless access point performance features ensure reliable and seamless
connections for users wherever they roam. Automatic channel selection automatically
finds the least loaded channel for interference-free communication. Auto network
connect and dynamic rate shifting keep users connected through a wide variety of
conditions by changing to the optimum connection speed as they move through the
network.
MANAGEABILITY
3Com offers a wide range of standards-based management support, from SNMP to
3Com Network Supervisor and HP OpenView for seamless integration with your
wired network.
Wireless Infrastructure Device Manager and Wireless LAN Device Discovery tools let
you configure parameters, run diagnostics, backup and restore configurations, and
monitor performance from anywhere on the network using an embedded web server
browser. You can also update wireless device software on multiple devices using
3Com Network Supervisor to simplify bulk updates.
With Power over Ethernet (PoE) support, the same Category 5 cable that connects your
access point to the data network also provides its power. A single cable installation
dramatically improves your choice of mounting configurations because you no longer
need to consider AC power outlet locations. PoE support makes it easier than ever to
overcome installation problems with difficult-to-wire or hard-to-reach locations.
WIRELESS NETWORK STANDARD
FAR-REACHING 802.11G
802.11g operates in the 2.4 GHz band at up to 54Mbps. Ratified in 2003, it supports
the widest coverage—up to 100 meters (328 feet). 802.11g shares the 2.4 GHz band
with other popular 802.11b devices that use this unlicensed radio spectrum. Use of
other devices in this frequency band can cause interference with 802.11g signals.
Consider 802.11g when you need wider coverage and vendor compatibility and you
are:
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Maintaining support for existing 802.11b users and the existing wireless investment
while providing for expansion into 802.11g.
5
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Implementing a complete wireless LAN solution, including bridges, gateways,
access points and clients; Wi-Fi certification guarantees compatibility
among vendors.
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Providing access to hot spots in public spaces, such as coffee shops or university
cafeterias.
NETWORK CONFIGURATION AND PLANNING
The wireless solution supports a stand-alone wireless network configuration as well as
an integrated configuration with 10/100 Mbps Ethernet LANs.
The wireless network cards, adapters, and access point can be configured as:
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Ad hoc for departmental or SOHO LAN
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Infrastructure for wireless LAN
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Infrastructure wireless LAN for roaming wireless PCs
AD HOC WIRELESS LAN
An ad hoc wireless LAN consists of a group of computers, each equipped with a
wireless adapter, connected via radio signals as an independent wireless LAN.
Computers in a specific ad hoc wireless LAN must therefore be configured to the same
radio channel. An ad hoc wireless LAN can be used for a branch office or SOHO
operation.
Ad Hoc Wireless LAN
Notebook with Wireless USB Adapter
Notebook with Wireless PC Card
PC with Wireless PCI Adapter
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INFRASTRUCTURE WIRELESS LAN
The access point can also provide access to a wired LAN for wireless workstations. An
integrated wired/wireless LAN is called an infrastructure configuration. A Basic
Service Set (BSS) consists of a group of wireless PC users, and an access point that is
directly connected to the wired LAN. Each wireless PC in this BSS can talk to any
computer in its wireless group via a radio link, or access other computers or network
resources in the wired LAN infrastructure via the access point.
The infrastructure configuration not only extends the accessibility of wireless PCs to
the wired LAN, but also increases the effective wireless transmission range for
wireless PCs by passing their signal through one or more access points.
A wireless infrastructure can be used for access to a central database, or for connection
between mobile workers, as shown in the following figure.
Wired LAN Extension to
Wireless Adapters
File
Server
Desktop
PC
Notebook with Wireless
PC Card Adapter
Access Point
PC with Wireless
PCI Adapter
INFRASTRUCTURE WIRELESS LAN FOR ROAMING WIRELESS
PCS
The Basic Service Set (BSS) is the communications domain for each access point. For
wireless PCs that do not need to support roaming, set the domain identifier (SSID) for
the wireless card to the SSID of the access point to which you want to connect. A
wireless infrastructure can also support roaming for mobile workers. More than one
access point can be configured to create an Extended Service Set (ESS). By placing the
access points so that a continuous coverage area is created, wireless users within this
ESS can roam freely.
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Seamless Roaming
File Server
Desktop PC
Switch
Notebook with Wireless
PCI Card Adapter
Switch
Notebook with Wireless
PCI Card Adapter
Access Point
Access Point
<BSS1>
<ESS>
PC withWireless
PCI Adapter
TERMINOLOGY
Access Point—An internetworking device that seamlessly connects wired and
wireless networks.
Ad Hoc—An ad hoc wireless LAN is a group of computers, each with LAN adapters,
connected as an independent wireless LAN.
Backbone—The core infrastructure of a network. The portion of the network that
transports information from one central location to another central location where it is
unloaded onto a local system.
Base Station—In mobile telecommunications, a base station is the central radio
transmitter/receiver that maintains communications with the mobile radiotelephone
sets within its range. In cellular and personal communications applications, each cell
or micro-cell has its own base station; each base station in turn is interconnected with
other cells’ bases.
BSS—Basic Service Set. It is an access point and all the LAN PCs that are associated
with it.
CSMA/CA—Carrier Sense Multiple Access with Collision Avoidance.
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EAP—Extensible Authentication Protocol, which provides a generalized framework
for several different authentication methods.
ESS—Extended Service Set. More than one BSS is configured to become an ESS.
LAN mobile users can roam between different BSSs in an ESS (ESS-ID, SSID).
Ethernet—A popular local area data communications network, which accepts
transmission from computers and terminals.
Infrastructure—An integrated wireless and wired LAN is called an
infrastructure configuration.
RADIUS—Remote Access Dial-In User Server is an authentication method used in
conjunction with EAP for 802.1x authentication and session based keys.
Roaming—A wireless LAN mobile user moves around an ESS and maintains a
continuous connection to the infrastructure network.
RTS Threshold—Transmitters contending for the medium may not be aware of each
other (they are “hidden nodes”). The RTS/CTS mechanism can solve this problem. If
the packet size is smaller than the preset RTS Threshold size, the RTS/CTS mechanism
will not be enabled.
VLAN—Virtual Local Area Network. A LAN consisting of groups of hosts that are on
physically different segments but that communicate as though they were on the same
segment.
WEP—Wired Equivalent Privacy is based on the use of security keys and the popular
RC4 encryption algorithm. Wireless devices without a valid WEP key will be excluded
from network traffic.
WPA—Wi-Fi Protected Access.
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2
INSTALLING THE ACCESS POINT
This equipment must be installed in compliance with local and national building codes,
regulatory restrictions, and FCC rules. For the safety of people and equipment, this
product must be installed by a professional technician/installer.
!
CAUTION: Before installing, see the important warnings and cautions in “Safety
Information” on page 11.
INSTALLATION REQUIREMENTS
The following items are required for installation:
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Access Point 7250.
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Standard detachable antennas.
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3Com installation CD.
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Wall-mount installation hardware (supplied): mounting plate, mounting screws,
and plastic anchors for drywall mounting.
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If you do not have IEEE 802.3af Power-over-Ethernet LAN equipment, use the
3Com AC adapter that comes with the access point.
•
If your LAN equipment complies with the IEEE 802.3af Power-over-Ethernet
standard, you can connect directly to the equipment, and the 3Com AC adapter is
not needed.
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Standard category 5 straight (8-wire) Ethernet cable.
The cable must be long enough to reach the power supply or the
Power-over-Ethernet LAN port.
If you use the 3Com AC adapter, you need an additional Ethernet cable to connect
the access point to the LAN.
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To access and use the Web configuration management system, you need a
computer that is running Internet Explorer 5.0 or newer and one of the following
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operating systems: Windows 98, Windows ME, Windows NT 4.0 Service Pack 6,
Windows 2000, or Windows XP. It is recommended that this computer become the
dedicated workstation for managing and configuring the access point and the
wireless network.
POWER REQUIREMENTS
The access point complies with the IEEE 802.3af Power-over-Ethernet standard. It
receives power over standard category 5 straight (8-wire) Ethernet cable. Installation
requires the use of either the 3Com AC adapter or IEEE 802.3af compliant power
supply equipment (output power rated 48 V dc @ 350 mA maximum). Such
equipment must be safety certified according to UL, CSA, IEC or other applicable
national or international safety requirements for the country of use. All references to
the AC adapter in this document refer to equipment that meets these requirements.
Because the AC adapter plug is the only means of disconnecting the access point from
power, make sure the power outlet is accessible.
See “Using the Included AC Adapter” on page 15 and “Using a Power-Over-Ethernet
LAN Port” on page 17.
Note: For use of the 3Com AC adapter (part number 61-0107-000) in Norway: This
product is also designed for use on an IT power system with phase-to-phase voltage of
230 V.
SAFETY INFORMATION
This equipment must be installed in compliance with local and national building codes,
regulatory restrictions, and FCC rules. For the safety of people and equipment, only
professional network personnel should install the access point, cables, and antennas.
!
CAUTION: If you supply your own Ethernet cable for connecting power, be sure that it is
category 5 straight-through (8-wire) cable that has not been altered in any way. Use of
nonstandard cable could damage the access point.
!
CAUTION: To comply with FCC radio frequency (RF) exposure limits, a minimum
body-to-antenna distance of 1 meter (3 feet) must be maintained when the access point
is operational.
CAUTION: To avoid possible injury or damage to equipment, you must use either the provided
power supply or IEEE 802.3af compliant power supply equipment that is safety certified
according to UL, CSA, IEC, or other applicable national or international safety requirements
for the country of use. All references to power supply in this document refer to equipment
meeting these requirements.
!
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!
!
CAUTION: The 3Com AC adapter (part number 61-0107-000) input relies on a 16A rated
building fuse or circuit protector for short circuit protection of the line to neutral conductors.
CAUTION: It is the responsibility of the installer to ensure that the
Power-over-Ethernet (POE) power supply is properly connected. Connection to any
other device, such as a standard Ethernet card or another POE supply, may result in
permanent damage to equipment, electric shock, or fire. Refer to the installation
instructions for proper installation
DECIDING WHERE TO PLACE EQUIPMENT AND
PERFORMING A SITE SURVEY
The access point is ideally designed for vertical installation on a wall surface, but can
also be flat-surface mounted in an elevated location where it will not be disturbed.
Ceiling installation is not recommended.
Whether you choose to mount the access point on a wall or place it on a flat surface,
make sure to select a clean, dry location that is elevated enough to provide good
reception and network coverage. Do not mount the access point on any type of metal
surface. Do not install the access point in wet or dusty areas. The site should not be
close to transformers, heavy-duty motors, fluorescent lights, microwave ovens,
refrigerators or any other electrical equipment that can interfere with radio signals.
If you are connecting the access point to a wired network, the location must provide an
Ethernet connection. You will need to run an Ethernet cable from the power supply to
the access point.
An access point provides coverage at distances of up to 100 Meters (300 Feet). Signal
loss can occur if metal, concrete, brick, walls, floors or other architectural barriers
block transmission. If your location includes these kinds of obstructions, you may need
to add additional access points to improve coverage.
Configuring a wireless LAN can be as easy as placing a 3Com Wireless Access Point
in a central area and making the necessary connections to the AP and the clients.
However, installing multiple Access Points may require more planning. Using the
3Com Site Survey tool (located on the installation CD) can help you determine if your
wireless LAN connectivity and throughput is adequate and all users are covered by an
Access Point.
If you plan to use an optional antenna instead of the standard detachable antennas that
are supplied, review “Selecting and Connecting a Different Antenna Model” on
page 20 before selecting the final location and be sure to allow for routing the antenna
cable as required.
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For optimal performance, ensure the access point operates in temperature ranges
between 0° C to 40° C (32° F to 104° F). When used with external antennas, the access
point operating temperature range must be 15° C to 40° C (59° F to 104° F).
NOTE: Regulatory restrictions dictate that when this device is operational, the
minimal body-to-antenna distance is 1 Meter (3 Feet).
BEFORE YOU BEGIN
Record the access point MAC address and serial number in a safe place before the
access point is installed in a hard-to-reach location. The MAC address is printed on the
back of the access point housing.
The following illustration shows the front and rear views of the access point, including
the LEDs and connecting ports.
LEDs
R
ad
E
io
th
t
ow
ne
P
er
er
Access Point 7250 - Front
Console port
Ethernet port
Power supply
Access Point 7250 - Back
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CAUTION: Do not connect a telephone cable into the Ethernet port; doing so can cause
serious damage to the access point.
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CONNECTING THE STANDARD ANTENNAS
The Access Point 7250 is supplied with standard detachable antennas. These should be
attached before the access point is installed. If using alternate antennas, see “Selecting
and Connecting a Different Antenna Model” on page 20.
1
!
Carefully unpack the standard detachable antennas.
CAUTION: Do not handle the antenna tips, especially after they are connected to the
access point, as this could lead to electrostatic discharge (ESD), which could damage
the equipment.
2
Screw an antenna into each of the sockets in the access point housing.
3
Hand-tighten the antennas at the very base of the SMA connectors without
handling the antenna tips.
4
Position the antennas so they turn out and away from the access point at a
45-degree angle. After network startup, you may need to adjust the antennas to
fine-tune coverage in your area.
Depending on the coverage required for your site, you may want to replace the
standard detachable antennas with one of the external antennas available for use
with the access point. See “Selecting and Connecting a Different Antenna Model”
on page 20.
CONNECTING POWER
It is advisable to connect the power and check the Ethernet cables and LEDs before
installing the unit in a hard-to-reach location.
The access point complies with the IEEE 802.3af Power-over-Ethernet standard. It
receives power over a standard category 5 straight (8-wire) Ethernet cable.
14
There are three ways to supply power to the access point:
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Use the AC adapter included with the Access Point 7250
•
Use a 3Com Integrated Power-over-Ethernet power supply. In this case, you need
to supply a second Ethernet cable to connect to the wired LAN.
•
Connect the access point directly to your own power-over-Ethernet hub or switch,
which must also comply with the IEEE 802.3af standard.
•
If you supply your own Ethernet cable for connecting power, be sure that it is
standard category 5 straight-through (8-wire) cable that has not been altered in any
way. Use of nonstandard cable could damage the access point.
USING THE INCLUDED AC ADAPTER
The power supply included with the Access Point 7250 is an AC adapter.
1
Connect the power cord to the AC adapter and plug the cord into a power outlet.
2
Connect the DC power into the Access Point 7250.
er
w
Po
et
rn
he
Et
o
di
Ra
Ethernet cable
AC adapter
Using the included AC adapter
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USING AN OPTIONAL POWER-OVER-ETHERNET INJECTOR
!
CAUTION: To avoid damaging network equipment, make sure that the cables are
connected from access point to power supply to LAN as shown above and
described below.
The Power-Over-Ethernet Injector can be located at any point between the access point
and the LAN access port, wherever a convenient power outlet exists. If you supply
your own Ethernet cable for connecting power, be sure that it is standard category 5
straight-through (8-wire) cable that has not been altered in any way. Use of
nonstandard cable could damage the access point.
Refer to the illustration below, and follow these steps:
1
Connect one end of the Ethernet cable to the Ethernet port on the access point.
2
Connect the other end of the Ethernet cable to the port labeled To Access Point on
the power supply.
3
Connect the power cord to the power supply and plug the cord into a power outlet.
4
To link the access point to your Ethernet network, plug one end of another
Ethernet cable into the port labeled To Hub/Switch on the power supply, and plug
the other end into a LAN port (on a hub or in a wall).
Ra
Eth
dio
Po
ern
et
we
Eth
dio
r
Ra
Po
ern
et
we
r
Using an Optional Power-over-Ethernet Injector
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Using an Optional Power-over-Ethernet
LAN Port
USING A POWER-OVER-ETHERNET LAN PORT
If your LAN equipment complies with the IEEE 802.3af power-over-Ethernet
standard, you can connect the access point directly to a LAN port. For example, the
illustration above right shows a connection through a 3Com Ethernet Power Supply to
a 3Com SuperStack® Switch.
CHECKING THE LEDS
When power is connected, the access point LEDs light. The illustration and the
following table describe the LEDs and their functions.
RADIO
ET
ETHERN
POWER
Name
Description
Radio
LED blinks red to indicate radio activity. Faster
blinking indicates more activity.
Ethernet LED lights yellow when a 10 Mpbs Ethernet link
is established. LED lights green when a 100 Mbps
Ethernet link is established. LED blinks to
indicate activity on the Ethernet. Faster blinking
indicates more activity.
Power
LED lights green when operational code
is running. LED lights yellow when a power-on
fault occurs.
17
MOUNTING ON A WALL
!
CAUTION: The mounting plate is designed for wall mount installation only. To avoid
equipment damage and possible injury, do not use the mounting plate for a ceiling
installation.
The access point comes equipped with all the necessary hardware for mounting on a
wall, including a mounting plate. For a secure installation, the mounting plate should
be placed perpendicular to the floor, with the arrow pointed up, as indicated on the
mounting plate, with the smooth side against the wall.
1
Install the mounting plate as shown in the following illustration, on either a stud
(or other hard wall surface), or onto drywall.
If installing into a stud or other
secure vertical surface, use 2 screws.
If installing into drywall, use
3 plastic anchors and 3 screws.
B
B
A
A
•
Allow for a clearance of at least 25 cm (10 Inches) between the ceiling and the
top of the mounting plate.
•
Orient the bracket with the letter “B” at the top of the bracket.
•
For installation on a wall stud, install the top screw into the stud, as shown at
left in the illustration, and then vertically align the mounting plate before
installingthe bottom screw.
•
For installation on to drywall, mark three screw holes using the mounting plate
as a template for vertical alignment, as shown at right in the illustration above.
•
Use a 5-mm (3/16-in.) drill bit if using the plastic anchors provided.
For drywall mounts, you can route the cable through either a side or center
opening for a seamless appearance using one of the methods illustrated below.
18
Alternatively, you can simply attach the Ethernet cable to the side of the unit,
allowing it to trail along the wall.
•
If you have routed the Ethernet cable through the center opening, secure the
cable on the hook located on the mounting plate as shown in the illustration
below.
2
Connect the Ethernet cable to the Ethernet port on the access point.
3
Connect the power cable to power port on the rear panel of the access point.
4
Position the access point at an angle to the mounting plate bayonet connection and
turn the unit clockwise until it snaps into place, as shown below.
Top opening
Hook for securing the cable
B
A
B
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Eth
ern
et
Po
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r
A
Center opening
Align with mounting plate
and rotate clockwise to lock
FLAT SURFACE INSTALLATION
The access point can also be placed on a flat surface such as a table, desktop or filing
cabinet. Do not install the access point on any type of metal surface. If you choose a
flat surface mount, select a location that is clear of obstructions and provides good
reception.
19
R
ad
Et
io
er
et
w
rn
Po
he
Connect Ethernet cable
Rotate antennas for best reception
Note: Regulatory restrictions dictate that when this device is operational, the minimal
body-to-antenna distance is 1 Meter (3 Feet).
SELECTING AND CONNECTING A DIFFERENT ANTENNA
MODEL
Important Notes:
• For FCC regulatory compliance reasons, in the United States, Canada, and other
countries governed by FCC guidelines, external antennas can only be used in an access
point operating temperature range of 15° C - 40° C (59° F - 104° F).
• If the access point is used with an external antenna you must also purchase an
antenna cable. For maximum efficiency, use the shortest antenna cable possible.
Antenna cables induce signal loss, which will limit the radiated power output and range
of the access point. Of the options available, we recommend the 3Com 6-foot Antenna
Cable (3CWE480).
The standard detachable antennas supplied with the Access Point 7250 are suitable for
a broad variety of environments. If you require a different type of antenna for the
Access Point 7250, several options are available by model number from the 3Com
Web site (www.3Com.com).
For each of the antenna models, you will need either a 6-foot accessory cable (model
3CWE480) or a 20-foot accessory cable (model 3CWE481) to provide the transition
from the SMA connector on the access point to the N-type connector on the antenna.
To ensure the physical safety of anyone near the antenna and to prevent damage to the
access point, follow the building codes for antenna installations in your area.
20
Antennas can be connected to either side of the access point after the standard
detachable antennas have been removed, as shown below.
r
we
Po
et
rn
he
Et
dio
Ra
r
we
Po
et
rn
he
Et
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Ra
1
Position the antenna so that there are minimal obstacles between it and any client
with which it will communicate. While maintaining a direct line of sight between
the antenna and a client is not strictly necessary, such an arrangement helps to
ensure a strong signal. Ensure that access is available for routing the antenna cable
from the antenna to the access point.
2
If they are installed, remove both arms of the standard detachable antennas,
making sure not to handle the tips of the antennas.
3
Connect one end of the optional antenna cable to the antenna and secure the
antenna in place.
4
Connect the free end of the antenna cable to either side connection on the access
point, as shown in the illustration above.
5
Make certain that the antennas and antenna masts are appropriately grounded to
prevent injury or damage from lightning strikes.
21
POWER SETTINGS ON THE ACCESS POINT FOR EXTERNAL
ANTENNAS
USA
2.5dBi
(3CWE492)
4dBi
(3CWE490,
3CWE497)
8dBi
(3CWE491,
3CWE498)
6 ft
(3CWE480)
100%
100%
100%
20ft
(3CWE481)
100%
100%
100%
50 ft
(3CWE482)
100%
100%
100%
2.5dBi
(3CWE492)
4dBi
(3CWE490,
3CWE497)
8dBi
(3CWE491,
3CWE498)
13dBi
(3CWE495)
6 ft
(3CWE480)
100%
100%
25%
12.5%
20ft
(3CWE481)
100%
100%
100%
25%
50 ft
(3CWE482)
100%
100%
100%
100%
European Community
22
INSTALLING SOFTWARE UTILITIES
The installation CD includes documentation and software utilities to help you set up
and administer the wireless components of your network.
To view product documentation, select View the Documentation from the CD Startup
Menu and then select the item you wish to view.
The software Tools and Utilities include:
•
3Com Wireless Infrastructure Device Manager. Use this tool to discover access
points and select devices for administrative changes.
•
3Com 3CDaemon Server Tool. This tool can act in four different capacities:
•
As a TFTP Server, necessary for firmware upgrades, and backup and restore
functions. Use this option if you do not have a TFTP server set up.
•
As a SysLog Server, which is necessary to view SysLog messages.
•
As an optional TFTP Client.
•
As an optional FTP Server.
•
3Com Network Supervisor. The 3Com Network Supervisor (3NS) graphically
discovers, maps, and displays network links and IP devices, including 3Com
wireless access points. It is not required for access point management.
•
3Com Site Survey Tool. This utility assists in selecting the best location for your
access point before installing the device permanently. Use the Site Survey Tool to
determine if the intended mounting locations will provide adequate coverage with
good signal strength and quality.
•
Internet Explorer 5.5. This browser is included for those who do not have a
suitable browser.
To install a tool from the CD:
1
2
3
4
Power up the computer and put the 3Com CD in the CD-ROM drive.
The setup menu should appear when the CD autostarts. If no menu appears, you
can run the setup.exe startup program from the Windows Start menu. For example,
if your CD drive is the D drive: Start / Run / d:setup.exe.
From the CD startup menu, select Tools and Utilities.
Select the item you want to install and follow the instructions on the screen.
23
3
SYSTEM CONFIGURATION
The access point can be configured using a Web browser that has Java support
(Internet Explorer 5.0 or newer). Using the Web management interface, you can
configure the access point and view statistics to monitor network activity.
The 3Com Wireless Infrastructure Device Manager helps you locate 3Com wireless
LAN devices on the network, select a device and view its properties, and launch the
device’s configuration in your Web browser. To configure a device, the device
manager must be installed on a computer that has an Ethernet adapter and is running a
supported Windows operating system and Web browser.
USING THE 3COM WIRELESS DEVICE MANAGER
After the 3Com Wireless Device Manager is installed, ensure that the device to be
configured is either wired to the network, associating with the wireless network, or
connected directly to the computer, and connected to power. If more than one device
using the factory default name is connected, make a note of the MAC address of the
device you want to select so that you can identify it in the device manager.
LAUNCHING A WIRELESS DEVICE CONFIGURATION
If you do not have a DHCP server on your network, it can take up to one minute for a
device to become discoverable after it has been powered up.
1
To launch the 3Com Device Manager, select Start /Programs /3Com
Wireless/Wireless Infrastructure Device Manager.
If you have more than one network adapter installed on your computer, you may
be prompted to choose a network adapter. Choose the appropriate adapter and
click OK.
The Wireless Network Tree appears in the 3Com Wireless Infrastructure Device
Manager window. The tree lists all WLAN service areas on the network and
expands to show the 3Com wireless LAN devices that are associated to each
service area. Devices in a different subnet than your computer are identified with
24
exclamation points (!). You can refresh this display by clicking Refresh. You
should refresh the display, for example, after you change a device IP address.
2
In the Wireless Network Tree, select the device you want to configure.
If more than one wireless LAN device appears in the tree and you are not sure that
you have selected the right one, click Properties and check the MAC address to
verify that it is the one you want.
3
Click Configure.
•
If the selected device is on the same subnet as your computer, the configuration
management system main page appears in your Web browser. (If a password is
set on the device, enter it when prompted.)
•
If the selected device is on a different subnet, the Pre-IP Configuration Wizard
is activated automatically. This wizard lets you configure the IP settings for the
selected wireless device. It proposes IP address and subnet mask settings
derived from your computer’s settings, so the selected device will then reside on
the same subnet as your computer. You can accept the suggested settings or
change them as required. For more information, see
“Using the Pre-IP Configuration Wizard” on page 26.
The next window prompts for an administrative password to allow the new IP
address to be set. When the units are shipped from the factory, there is no
administration password and you should leave the password field blank. If an
administration password has been set for the device, enter the password and click
Next. The 3Com Web Configuration Management System main screen appears in
your Web browser.
The following table describes the functions of the buttons in the 3Com Wireless
Infrastructure Device Manager window.
Button
Description
Properties
Displays the following properties of the selected device: Device Name, Device
Type, Wireless LAN Service Area (ESSID), IP Address, Subnet Mask, and
MAC Address.
Configure
Launches the Configuration Management System for the selected device. If the
selected device is on a different subnet, you are prompted to assign an address
on the same subnet as your computer.
Refresh
Scans the network and displays the connected 3Com 11 Mbps Wireless
LAN devices.
Choose NIC If your computer has more than one network interface card installed, allows you
to choose which card you want to use.
Close
Closes the device manager window and ends the session.
25
Button
Description
Help
Launches the device manager help page in your browser.
USING THE PRE-IP CONFIGURATION WIZARD
You can only configure devices that are on the same subnet as your computer. To
configure a device on a different subnet, you must first assign it an IP address on the
same subnet as your computer. After you launch the configuration, you can change
settings as usual. Just before you finish, you must change the device IP address back to
its original setting. Follow this procedure:
1
In the Wireless Infrastructure Device Pre-IP Configuration window, accept the
suggested settings or change them as required. You can assign a static IP address
or specify that the device obtain its IP address from a DHCP server.
2
The next window prompts for an administrative password. When the units are
shipped from the factory, there is no administration password and you should
leave the password field blank. If an administration password has been set for the
device, enter the password and click Next. The Configuration Management System
main page appears in the Web browser.
CONFIGURATION LOGIN
After you launch the configuration from the device manager, the login page appears in
your browser. The default Username is admin and the default password is no
password. For an initial configuration, enter the default Username and click LOGIN.
Then set the Country Code as described below.
SETTING THE COUNTRY CODE
The Country Code determines the available channels and transmission power level
based on regulatory restrictions in the country where the access point is installed. The
first time you log in, you must set the Country Code.
To ensure compliance with local regulations, be sure to select the country in which the
access point is installed.
In the Country Code page, select the country from the pull-down list and click Apply.
The Home page appears.
26
BASIC SETUP
For a basic configuration, use the Setup Wizard as described below.
At any time, you can click Home to return to the Home page of the configuration
interface. If you want to configure more advanced features, click Advanced Setup in
the Home page.
1
In the Home page, click Setup Wizard.
2
In the “1-2-3” Setup Wizard page, click Next to start basic configuration.
3
In the SSID page, enter the same Service Set ID as the other wireless devices in
your network and click Next. (The SSID may be up to 32 alphanumeric characters
and is case sensitive.)
4
In the Channel page, select the channel options for the access point radios and
click Next. The channel options are:
802.11g—You can select from these options:
•
802.11g Radio Channel—Set the operating radio channel number.
•
Auto Channel Select—When this mode is enabled, the access point selects a
radio channel automatically.
5
In the TCP/IP Settings page, you can choose whether the access point obtains its
IP address from a DHCP server or uses a static IP address. Configure the DHCP
Client settings and click Next.
6
In the Security page, make selections and click Next.
For details on security settings, see “Security” on page 41.
7
Click Finish.
8
Click OK to restart the access point.
27
ADVANCED SETUP
The Advanced Setup pages allow you to configure features that are not available in the
basic setup. On the Home page, click Advanced Setup to open the Advanced Setup
menu.
After making selections and entering data on each page, click Apply to save the
changes.
The following sections describe the Advanced Setup pages.
IDENTIFICATION
On the Identification page, you can identify the access point by providing a descriptive
name. This name then appears in the device manager window. Enter a maximum of 32
alphanumeric characters in the System Name field and click Apply.
TCP/IP SETTINGS
On the TCP/IP Settings page, you can configure TCP/IP (Transmission Control
Protocol/Internet Protocol) settings as described below. When you are finished
configuring items on this page, click Apply.
DHCP CLIENT
When DHCP (Dynamic Host Configuration Protocol) Client is enabled, and a DHCP
server is located on the network, the network DHCP server assigns the IP address,
subnet mask and default gateway to the access point.
If there is no DHCP server on the network, the access point automatically uses its
default IP address, 169.254.2.1.
When DHCP Client is disabled, you can specify the IP setup as follows:
•
IP Address and Subnet Mask—If you configure an IP address and subnet mask,
you must configure the network settings of the computers on your wireless LAN to
use the same subnet mask. The IP addresses specified must be valid on the same
subnet.
•
Default Gateway—The default gateway address is optional, but may be required
by your Internet Service Provider.
•
Primary DNS Address and Secondary DNS Address—The Domain Name
Servers (DNS) map numerical IP addresses to the equivalent domain name (for
28
example, www.3Com.com). Your internet service provider should provide the IP
address of one or more domain name servers. Enter those addresses in Primary
DNS Address and Secondary DNS Address fields.
SECURE WEB SERVER CONNECTION
This option controls whether Secure Socket Layer (SSL) technology is used to encrypt
information between the computer and the device during a configuration session. By
default this option is Off. When this option is turned on, the HTTPS protocol is used,
and data is protected during the configuration session. When it is turned off, the HTTP
protocol is used, and data could be intercepted during the configuration session.
Changing this option causes the device to reset, which disrupts the network association
temporarily, but does not affect device configuration settings that have already been
saved.
RADIUS
The RADIUS page lets you define servers to be used for authentication and
accounting. RADIUS (Remote Access Dial-In User Service) is a login authentication
protocol that uses software running on a central AAA (Access, Authentication, and
Accounting) server to control access to RADIUS compliant devices on the network.
There are no special settings on the access point to distinguish between the various
RADIUS policies or authentication types (for example EAP-MD5, EAP-TLS,
EAP-TTLS). These policies are setup and controlled on the AAA server. Note that for
most RADIUS software packages, the access point is actually called the “RADIUS
client” and has a shared secret or secret key corresponding to the RADIUS setup page
(see KEY parameter below).
The access point can send connection parameters to a RADIUS server, as well as
statistics for accounting purposes. The access point is compatible with RFC2866 (the
RADIUS Accounting specification).
Configuring a secondary RADIUS server provides a backup in case the primary server
fails. The access point will use the secondary server if a failure is detected in the
primary server. Once the access point switches over to the secondary authentication
server, it periodically attempts to establish communication again with primary
authentication server. Once communication is established, the secondary
authentication server reverts back to a backup server. The access point will use the
secondary accounting server if a failure is detected in the primary accounting server. It
will continue to use the secondary accounting server until it fails, in which case it
returns to sending data to the primary accounting server.
29
See below for recommended steps in configuring RADIUS Authentication.
In the RADIUS Authentication section, enter the required parameters for a primary
and secondary RADIUS authentication server.
In the RADIUS Accounting section, click the Enable radio button, then enter required
parameters for a primary and secondary RADIUS accounting server.
When you are finished configuring items on this page, click Apply.
The parameters are described below.
•
IP Address—The address of the server.
•
Port—The network (UDP) port of the server used for messages. The port defaults
to 1812 (1813 for RADIUS Accounting) and must match the port configured on the
RADIUS server.
•
Key—The encryption key is a shared ASCII string that is used to authenticate
logon access for the client. The maximum length is 255 characters. Do not use
blank spaces in the string. The key must be configured the same on both the access
point and the RADIUS server. The Authentication and Accounting RADIUS
servers can have different secret keys.
•
Timeout—The number of seconds the access point waits for a reply from the
RADIUS server before it resends the request.
•
Retransmit attempts—The number of times the access point will try to
authenticate logon access.
•
Update Interval— (RADIUS Accounting Only) This is the interval in seconds
between accounting updates sent to the RADIUS accounting server.
•
Accounting Log Options— (RADIUS Accounting Only) This option controls
which clients will generate accounting logs. If set to RADIUS Authenticated
Clients Only, only those clients which successfully complete 802.1x
Authentication will generate accounting logs. The default is for all authenticated
clients to generate accounting logs.
AUTHENTICATION
The Authentication page allows you to configure the type of upper-layer authentication
the access point uses for wireless clients. Access is checked against the MAC Address
authentication database stored on the access point.
NOTE: This level of authentication occurs BEFORE any 802.1x authentication
configured on the Security page. When using Local and RADIUS MAC
30
Authentication, clients attempting to authenticate to the access point MUST pass these
settings before any subsequent 802.1x authentication is attempted and verified. If no
MAC address filtering is desired, leave this set to the default setting of Disable.
Configure the options as described below. When you are finished, click Apply.
•
MAC Authentication— Selecting MAC authentication allows you to define
access permission and precedence. Options are:
Local MAC— With this option, the MAC address of the associating station is
compared against the local access control list. You must build this list (called the
MAC Authentication Table) as described in Local MAC Authentication below.
Use this option if you want to restrict wireless clients authentication to the access
point based off their MAC address.
RADIUS MAC— With this option, the MAC address of the associating station is
sent to the configured RADIUS server for validation. You must specify the
authentication sequence and the corresponding parameters for the remote
authentication protocol. See “RADIUS” on page 29 and “802.1x Wireless
Setup” below.
Disable— No MAC address related checks are performed on a client requesting
authentication to the access point.
•
802.1x Wireless Setup—802.1x is designed to enhance the security management
of the wireless network. Select one of the following options:
Disable— The access point will neither initiate nor respond to any 802.1x
authentication requests to or from wireless clients.
Supported — Legacy clients (non 802.1x) and 802.1x clients are both supported.
This is provided for ease of migration. This option works with WPA key
management set to either “WPA authentication over 802.1x” or “WPA pre-shared
key (PSK)” on the radio security page.
Required — Clients authenticate to a RADIUS server via the access point. Clients
are not allowed onto the wired LAN until authentication is successful.
When 802.1x is enabled, the broadcast and session key rotation intervals can also
be configured. Set these values to force the periodic refresh of broadcast or session
keys for each 802.1x client.
First set up the RADIUS authentication for the client on the RADIUS
authentication server. (See “RADIUS” on page 29.) Select Supported or Required
on the 802.1x Wireless Setup field above. Enter data as described in the following
table.
Field
Default
Broadcast Key Refresh Rate 0
(minutes)
31
Description
Defines how long the RADIUS server will
refresh the primary broadcast key.
Field
Default
Description
Session Key Refresh Rate
0
(minutes)
Defines how long the RADIUS server will
dynamically re-assign a session key to a
connected client station.
802.1x Reauthentication
Refresh Rate
0
(seconds)
Defines the time interval in which the Access
Point forces a Reauthentication and
subsequently re-issues a new session key.
•
Access Point 802.1x Authentication to Network—802.1x can also be enabled on
the ethernet port of the switch that the access point’s ethernet cable is plugged into.
Having 802.1x enabled on the switch prevents any device that is not able to
successfully authenticate from being able to use the ethernet port. This option is
useful if your access point is located in an insecure location, and you want to
prevent someone who plugs a computer or another access point into the network
connection being used by your access point from being able to access the network.
This feature defaults to being disabled.
If “MD5 Authentication to Network with MAC Address” is selected, the access
point’s MAC address will be used for both the username and password. For
example, an access point with the MAC Address 12-34-56-78-9A-BC would use a
username and password of “123456789abc”.
If “MD5 Authentication to Network with Supplied Username and Password” is
selected, the access point with authenticate using the username and password
supplied. If you press the “Apply” button when no password is specified, the
previous password will continue to be the one used. You must enter the same
password twice to successfully change the password.
•
Local MAC Authentication—Client computers can be filtered using the unique
MAC addresses of their network cards. To build the MAC Authentication Table,
enter a MAC address in the space provided, choose the permission, and click
Update. MAC addresses are listed in the MAC Authentication Table in the order
that they were entered. The Local MAC Authentication parameters are described in
the following table:
32
Parameter
Description
System Default
Define the default filtering setting as Deny or Allow.
MAC Address
Enter the MAC address of a client for the access control. You can
find the MAC address of a network card as follows:
Windows 95/98/ME—Click Start/Run. Type winipcfg and press
Enter. The MAC address is in the Adapter Address section.
Windows NT4/2000/XP—At the command prompt, type
ipconfig /all and press Enter. The MAC address is listed as the
Physical Address.
Linux—Run the command “/sbin/ipconfig.” The card’s MAC
address is the value after the word “HWaddr.”
Permission
Allows or denies access to the access point of devices matching
the specified MAC address.
Update button
Click Update to refresh the MAC Authentication Table. To avoid
the possibility of entering an invalid MAC address on the
Authentication page, always click Update after typing the
address. If you press Enter, address error checking does
not occur.
FILTER CONTROL
The Filter Control page allows you to control client communication within the wireless
network. You may enable one or more types of supported filtering; however, some
filter choices may supersede others. Configure the options as described below. When
you are finished, click Apply.
FILTERING BY VLAN
The access point supports filtering of up to 64 VLANs (virtual local area networks).
VLAN IDs must be configured for each client on one of the RADIUS authentication
servers specified on the RADIUS configuration page. If a RADIUS server is not being
used or not setup to update the VLAN ID, then the access point will tag all ethernet
packets with the Native VLAN ID (defaulted to 1).
If a RADIUS authentication server will be used to create/modify the VLAN ID, the
following attributes must be provisioned on the RADIUS Server to be passed back to
the authenticating client:
The AP’s IP address is the RADIUS Client/Radius User
Tunnel_type (64) = VLAN (13)
Tunnel_Medium_type (65) = 802
33
Tunnel_Private_group_ID (81) = VLAN ID specified in Hexadecimal format.
VLAN Switch ports must be tagged ports that match the VLAN ID on the Access
Point. Associated client VLAN IDs will appear in the Syslog file in ASCII Decimal
format.
When VLAN filtering is enabled, the access point queries the server for the VLAN IDs
of associating clients and saves the VLAN IDs. If a client does not have a VLAN ID,
the access point assigns its own native VLAN ID to that client.
To enable VLAN filtering, enter a VLAN ID (a number between 1 and 4095) in the
Native VLAN ID field and select VLAN Enable.
When VLAN filtering is disabled, the access point ignores VLAN-tagged frames.
SECURITY FILTERS
These options allow you to block communication among wireless clients
(client-to-client blocking) and prevent wireless clients from performing access point
administration.
•
Local Bridge Filter—Enable this filter to prevent direct communication between
wireless clients, creating a more secure wireless network.
•
AP Management Filter—Enable this filter to prevent wireless clients from
accessing the access point for management; for example through TELNET or
SNMP.
CLIENT LIST TIMEOUT
This option sets the timeout for inactive clients to be disassociated and removed from
the associated client list. The interval can be set to 1, 5, 10, 30 or 60 minutes (default is
30 minutes).
UPLINK PORT MAC ADDRESS FILTERING
This feature allows associated wireless clients to communicate only with specific
selected MAC addresses on a subnet. By only allowing clients to communicate with a
few specific servers such as DHCP server, a Gateway, or a local web server, clients are
blocked from communicating with other clients on the local subnet, but are still
allowed (via the gateway) to communicate with severs on the Internet. Note: In most
cases client to client blocking should also be enabled as the Uplink Filter only works
on packets coming into the AP from its Ethernet (uplink) port.
For security reasons it is desirable to block client to client communications for wireless
clients associated with an Access Point (AP). It is also desirable to block
34
client-to-client communications between clients associated with different AP’s on the
local subnet. For instance an airport may have several AP’s to service several "hot
spots" within the airport. However the client-to-client blocking feature of the AP will
only block communications to other clients associated with the same AP. It will not
block client-to-client of other AP communications. By using the Uplink Filtering
function of the AP communications to all other clients of all other AP’s on the same
subnet can be blocked.
It is important to note that this feature only works if all the AP’s are on the same
subnet. If an AP is located on the far side of the gateway (i.e. on a different subnet) its
clients will NOT be blocked from communicating with clients on the local subnet of
interest.
This feature is accessed on the Filter Page of the user interface. Click on the Uplink
Filter List link and add up to eight MAC addresses that WILL be allowed to
communicate with clients of the AP. Make sure to include the MAC of the local
DHCP server, if it not the same as the gateway as well as and redirect gateways and
other servers that should be allowed to communicate with the AP’s wireless clients.
Make sure to click on the save button on both the Uplink Filter List page as well as the
Filter page to activate the function.
FILTERING BY ETHERNET PROTOCOL TYPE
Use the Ethernet Type Filter table to filter out Ethernet packet frames that match the
Ethernet protocol type. Select Ethernet Type Filter Enable, then set the status of each
Ethernet frame type in the list.
Although there are five types of IPX packets, the Filter Control page shows only two
options for IPX filtering. The following table shows how to filter each IPX packet
type:
ISO Designator
Filter
8138
Enable 8138
8137
Enable 8137
802.3(Raw)
Enable 8138
802.2
Enable 8138
SNAP
Enable 8137
SNMP
Use the SNMP page to display and enter a community string for the Simple Network
Management Protocol. To communicate with the access point, the SNMP agent must
35
first be enabled and the Network Management Station must submit a valid community
string for authentication. Select SNMP Enable and enter data into the fields as
described below. When you are finished, click Apply.
•
Location—Specifies the access point location.
•
Contact—Sets the system location string that describes the system location.
(Maximum length: 255 characters)
•
Community Name (Read Only)—Specifies a community string with read-only
access. Authorized management stations are able to retrieve MIB objects. The
default is “public.” (Maximum length: 23 characters)
•
Community Name (Read/Write)—Specifies a community string with read-write
access. Authorized management stations are able to both retrieve and modify MIB
objects. The default is “private.” (Maximum length: 23 characters)
•
Trap Destination IP Address—Fill in the IP address box for a trap manager that
will receive these messages.
•
Trap Destination Community Name—Fill in the community string box for a trap
manager that will receive these messages. (Maximum length: 23 characters)
ADMINISTRATION
The Administration page allows you to perform access point management tasks as
described below.
•
Change Password—A password is required to configure the access point. Enter
the user name and new password in the spaces provided and click Apply. It is
recommended that you change the password from the default value (no password)
to ensure network security.
•
Firmware Upgrade—You can upgrade firmware from a downloaded file that you
have placed on the local computer, or from a remote FTP or TFTP server.
•
•
Local—Click Browse to locate the downloaded firmware file. Click Start
Upgrade to start the upgrade process. The upgrade takes place through the
HTTP protocol from the local machine.
•
Remote—Select FTP or TFTP. Enter the firmware file name, the host IP
address where the file is stored, the user name, and the password. Click Start
Upgrade to start the upgrade process.
Backup and Restore Configurations—Access point configurations can be saved
as data files and later used to restore the access point configuration. This option lets
36
you save access point settings in an external file or copy them from an external file
to the access point. You can save an entire configuration for use as a backup to a
single access point, or you can save a basic configuration, which can then be used
in common by several access points in a network, providing an easy way to
reconfigure all access points in a network.
You must have a TFTP server set up on which to store the backup files.
To back up a configuration — Type the IP address of the TFTP server and a
name for the backup file in the spaces provided. Click Basic (to save a partial
configuration) or Complete (to save an entire configuration) and click
Backup Configuration.
To restore a configuration — Type the IP address of the TFTP server and the
name of the backup file in the spaces provided and click Restore Configuration.
Restoring a configuration causes the access point to reset. If the file being restored
was saved as a Basic configuration, only general configuration parameters such as
SSID, country code, radio settings, security settings, RADIUS server settings, and
management setup information are restored. Parameters that are unique to
individual access points, such as device names, IP addresses, and administration
passwords, are neither affected nor overwritten.
Before restoring a configuration you can view a description of the restoration
point by clicking the Restore User Comment button. Comments made at the
point the backup was created will appear in the “User Comments” field. This
feature allows the user to select the correct restoration point.
To restore comments — Click the Restore Comments button to view comments
saved on previous backups.
•
Factory Settings—Click Restore to load the factory default configuration and
reboot the access point. All user-configured information is lost. You must reenter
the default user name (admin) to regain management access to this device.
•
Reset Access Point—Click Reset to perform a hardware reset of the access point.
Current configuration settings are not changed.
SYSTEM LOG
The System Log page allows you to set up a server to store event logs and to specify
how the access point obtains the date and time. When you are finished configuring
items on this page, click Apply.
Each logging message is tagged with a severity level, as defined in RFC3164. The
severity levels are:
•
Emergency: system is unusable
37
•
Alert: action must be taken immediately
•
Critical: critical conditions
•
Error: error conditions
•
Warning: warning conditions
•
Notice: normal but significant condition
•
Informational: informational messages
•
Debug: debug-level messages
To set up a server for event logs: Select System Log Setup Enable, select a logging
severity level from the pull-down list, enable the Logging Host and Logging Console,
and enter the IP address of the server in the space provided.
To designate an SNTP server for obtaining the date and time: Select SNTP Server
Enable and enter the IP addresses for primary and secondary SNTP servers in the
spaces provided.
To use the access point as an SNTP server: Select SNTP Server Disable, specify
time values in the spaces provided, select the time zone from the pull-down list. If you
check the Enable Daylight Saving check box, the time will adjust automatically for
standard and daylight saving time. When the SNTP Server setting is disabled, date and
time settings revert to the defaults after an access point is reset, affecting the accuracy
of log reports. To avoid this situation, enable the SNTP server setting and allow the
access point to obtain the date and time from an SNTP server. (The event log page will
display the default time after a reset until the access point receives the correct
information from the SNTP server.)
STATUS
The Status pages display additional information about the access point status and
station status.
•
AP Status—Click AP Status to view the access point system configuration and
access point wireless configuration.
•
Stations Status—Click Stations Status to view the configurations of connected
stations. The Station Status page displays basic connection information for all
associated stations. Select “refresh” on you browser to see update station status.
•
Event Logs—Click Event Logs to display the activity log of the access point. The
event log resets to zero if the access point is reset. The log saves 128 events, then
overwrites the first event and continues.
38
RADIO INTERFACE
The access point radio interface detects the number of radios installed and their type
(802.11g Radio or 802.11b Radio). The Radio Settings and Security options for the
radio interface are described in the following sections.
RADIO SETTINGS
When you are finished configuring items on this page, click Apply.
•
SSID—Enter the Service Set ID (up to 32 alphanumeric characters). Clients must
set their SSIDs to match the access point. The SSID is case sensitive.
•
Closed System— Enabling this option will not publicly broadcast the SSID.
•
Radio Channel—From the pull-down list, select the radio channel over which the
access point communicates to computers in its BSS. Available channel settings are
limited by local regulations that determine which channels are allowed. The client
channel for wireless users is automatically set to that used by the access point to
which they are linked. When multiple access points are deployed in the same area,
be sure to choose channels separated by at least five channels to avoid channel
interference. You can deploy up to three access points in the same area; for
example, Ch1, Ch6, and Ch11.
•
Auto Channel Select —Select Auto Channel Select Enable to allow the access
point to select a radio channel automatically. (Default: Enable)
•
Transmit Power —Set the signal strength transmitted from the access point. The
longer the transmission distance, the higher the transmission power required.
(Default: 100%)
•
Maximum Station Data Rate—Select the appropriate data rate from the
drop-down list for the data transfer speed running on your network. (802.11b
default: 11 Mbps.) In order to reach all clients, this rate should be set lower (for
example, 1 or 2 Mbps on an 802.11b radio). To isolate clients that are unable to
connect at higher rates, set this value higher.
•
Beacon Interval (20-1000)—Sets the beacon signal interval at which beacon
frames are transmitted from the access point. The beacon signals allow wireless
devices to maintain contact with each other. They may also carry
power-management information. The Beacon Interval unit is TU, which
corresponds to 1024 microseconds. (Default: 100 TU)
39
•
Fragment Length (256-2346) —The Fragment Length can be set between 256 and
2,346. If the packet size is smaller than the preset fragment size, the packet will not
be segmented.
Fragmentation of the PDUs (Package Data Unit) can increase the reliability of
transmissions because it increases the probability of a successful transmission due
to smaller frame size. If there is significant interference present, or collisions due
to high network utilization, try setting the fragment size to send smaller fragments.
This will speed up the retransmission of smaller frames. However, it is more
efficient to set the fragment size larger if very little or no interference is present
because it requires overhead to send multiple frames. (Default: 2346)
•
RTS Threshold (0-2347)—Set the RTS (Request to Send) frame length. You may
configure the access point to initiate an RTS frame sequence always, never, or only
on frames longer than a specified length. If the packet size is smaller than the preset
RTS threshold size, the RTS/CTS mechanism will not be enabled.
The access point sends RTS frames to a particular receiving station to negotiate
the sending of a data frame. After receiving an RTS frame, the station sends a CTS
(Clear to Send) frame to acknowledge the right of the sending station to send data
frames. The access points contending for the medium may not be aware of each
other. The RTS/CTS mechanism can solve this hidden node problem.
(Default: 2346)
•
Preamble Setting—IEEE 802.11 frames begin with an alternating pattern of 1s
and 0s called the preamble, which tells receiving stations that a frame is arriving.
This provides time for the receiving station to synchronize to the incoming data
stream. Enabling the Short preamble can boost your throughput; however, this can
cause interoperability issues. (Default: Long)
•
Client Access Mode—802.11g radios can support both 802.11b and 802.11g
clients. This option determines which mode the radio will operate in and
consequently which clients will be able to connect to the radio interface. The
default is to provide information for both 802.11g and 802.11b clients. Higher
throughput can be achieved if the option for the 802.11g clients only is selected
(since the radio is not required to transmit at the lower 802.11b rates/method).
•
Data Beacon Rate—Sets the interval at which a beacon will contain a delivery
traffic indicator message (DTIM). The Access Point sends a DTIM to signal clients
which are in sleep mode that a message is waiting to be delivered to them. The
range for this setting is 1-255 beacons. (Default: 2)
40
SECURITY
The Security page allows you to set up lower-layer client authentication and data
encryption parameters as described below. When you are finished configuring items
on this page, click Apply.
CONFIGURING AUTHENTICATION
Three types of authentication can be configured:
•
Open System (the default)—Allows access to everyone.
•
Shared Key—If Shared Key is enabled, Encryption must also be enabled as
described in “Configuring Encryption” on page 42.
•
128-Bit Dynamic Security Link—This option can only be used with other 3Com
Wireless LAN devices. The user name and password set on the access point must
match those set on the clients. Each network session creates a unique, one-time
encryption code.
To enable 128-bit Dynamic Security Link authentication, follow these steps:
1
Select 128-bit Dynamic Security Link.
2
Decide whether to require Windows user authentication:
If you check the Require Windows user authentication check box, clients will be
required to enter a user name and password every time they associate with the
network. If you leave this box unchecked, the system will authenticate clients
based on the access control list and the saved passwords on the clients.
3
Create a User Access List:
There must be at least one entry in the User Access List, which determines the
users that can associate with the access point.
Click Edit User Access List. In the User Access List page, user names are listed.
Scroll to the bottom of the list to perform the following actions:
To add a new user, click Add Users. In the next page, type the user name and
password in the spaces provided and click Apply.
To delete users, click Delete Users. In the next page, check the check boxes next
to the names to be deleted and click Apply.
To modify a password, click Change Password. In the next page, select the user
name from the pull-down list. Enter the new password in the spaces provided and
click Apply.
41
CONFIGURING ENCRYPTION
There are two types of data encryption available:
•
WPA—Wi-Fi Protected Access.
•
WEP—Wired Equivalent Privacy.
The access point and the wireless devices must have the same encryption settings
to communicate. You can choose to allow only clients using WPA encryption, or you
can allow both WPA and WEP clients.
The following sections describe how to configure each type of encryption. When you
are finished configuring the encryption, click Apply.
WPA Configuration
To configure WPA encryption:
1
Under WPA Configuration, click the Required check box if you want to limit
access to clients using WPA encryption. If you also want to allow WEP clients, do
not check this box.
2
Select the Cipher Mode, which determines the method by which keys are
computed. WEP is the weakest Multicast Cipher Mode and is only provided for
support of legacy clients which do not fully support WPA. Clients associated with
WPA-TKIP will have unicast packets directed at them with corresponding
encryption keys. However, with WEP selected as the Cipher Mode, ALL multicast
traffic is sent out with WEP encryption. It is recommended to only select WEP as
the Cipher Mode if legacy client support is critical.
AES - Advanced Encryption Standard (Highest Security)
TKIP—(Temporal Key Integrity Protocol) provides per-packet key mixing, a
message integrity check and a re-keying mechanism
WEP—Provides standard WEP ciphering (Least Secure)
3
Select the type of WPA Key Management:
WPA authentication over 802.1x (More secure, but requires a RADIUS
authentication server setup. (See WPA note below)
WPA Pre-shared Key (PSK) (see WPA note below)
4
Select the Key Type:
Hexadecimal (0~9, A~F; for example, D7 0A 9C 7F E5)
Alphanumeric (0~9, A~F; for example 01234)
5
Enter the pre-shared key in the space provided if necessary.
42
WPA Note:
The WPA key management must match the settings on the Authentication Page. When
using 802.1x, the access point uses session keys provided during the 802.1x EAP key
exchange as the “seed key” for WPA. This is more secure than PSK, since each client
starts with a unique session key for all subsequent keys generated. Otherwise, the PSK
is used for the “seed key”.
The 802.1x Wireless Setup on the Authentication Page should be set as follows:
•
If only one Radio is installed, and “WPA pre-shared key (PSK)” is selected on the
security page, then the 802.1x Wireless Setup can be either “Disabled” or
“Supported” on the Authentication Page.
•
If only one Radio is installed and “WPA authentication over 802.1x” is selected on
the security page, then 802.1x Wireless Setup must be either “Supported” or
“Required” on the Authentication Page.
WEP Configuration
WEP encryption is based on the use of security keys and the popular RC4 encryption
algorithm.
At least one transmit key must be defined in the WEP Configuration. Wireless devices
without a valid WEP key will be excluded from network traffic.
The key selected as the transmit key index is used by the access point for all
transmissions. Other keys defined can be used by the access point for decrypting
station communications. When enabling 802.1x security with dynamic session keys,
key index 4 is reserved for the 802.1x client session key. Therefore, when 802.1x
clients are in the network, the access point should not be configured to use key index 4
as the transmit key index.
To configure WEP encryption:
1
Under Encryption, select Enable.
2
Under WEP Configuration, select the Key Size.
The access point supports shared key encryption with key lengths of 64-bits,
128-bits, or 152-bits.
3
Select the Key Type.
Hexadecimal (0~9, A~F; for example, D7 0A 9C 7F E5)
Alphanumeric (0~9, A~F; for example 01234)
3Com Passphrase(a string, described below)
4
Enter the keys in their fields.
64-bit—Each key contains 10 hexadecimal digits or 5 alphanumeric characters.
43
128-bit—Each key contains 26 hexadecimal digits or 13 alphanumeric characters.
152-bit—Each key contains 32 hexadecimal digits or 16 alphanumeric characters.
3Com Passphrase—This encryption string is for use only with other 3Com
Wireless LAN devices. It is a case-sensitive string between 6 and 30 characters
long. To enter the string, click 3Com Passphrase. Then type any combination of
letters and numbers in the Key 1 field and click Apply.
5
Uncheck box under WPA Configuration.
6
Choose the WEP option under Multicast Cipher Mode.
HOW TO SETUP THE ACCESS POINT FOR RADIUS
AUTHENTICATION
1
Using the Wireless Infrastructure Device Manger access the configuration screen
for the AP8x00/AP82x0.
2
Enter your User Name and Password and click LOGIN (Default: admin with no
password).
3
Select Advanced Setup.
4
Click on RADIUS from the left frame page Menu.
5
Enter all the settings of your Primary RADIUS Authentication Server (make sure
the IP Address and Key match those on the RADIUS Authentication software).
6
Click on Apply.
7
Choose Authentication from the left frame page Menu.
8
Make sure the following settings are set on the Authentication page:
9
a MAC Authentication is Disabled. (if Local or RADIUS MAC Authentication
is chosen MAC address filtering or authentication, respectively, will be done
before the 802.1x authentication. Therefore, these setups must be validated
individually and verified functional before 802.1x can be done).
b 802.1x Wireless Setup: is set to Optional (if non-RADIUS clients need access
too) or Required (if only RADIUS clients are to be allowed).
c Click on Apply.
Click Security on the 802.11b/g radio from the left frame page Menu.
10 Make sure the following settings are set from the Security page:
a Authentication is set to Open System.
b Encryption is Enabled.
c WPA Configuration Required “Allow only WPA Clients” is left unchecked.
44
d Cipher Mode is set to WEP.
e WEP Configuration has at least one valid WEP key.
f Click on Apply.
11 The Access Point is now configured for RADIUS Authentication.
HOW TO SETUP THE ACCESS POINT FOR WPA WITH 802.1X
SESSION KEYS
1
Using the Wireless Infrastructure Device Manger access the configuration screen
for the AP8x00/AP82x0.
2
Enter your User Name and Password and click LOGIN (Default: admin with no
password).
3
Select Advanced Setup.
4
Click on RADIUS from the left frame page Menu.
5
Enter all the settings of your Primary RADIUS Authentication Server (make sure
the IP Address and Key match those on the RADIUS Authentication software).
6
Click on Apply.
7
Choose Authentication from the left frame page Menu.
8
Make sure the following settings are set on the Authentication page:
9
a MAC Authentication is Disabled. (if Local or RADIUS MAC Authentication
is chosen MAC address filtering or authentication, respectively, will be done
before the 802.1x authentication. Therefore, these setups must be validated
individually and verified functional before 802.1x can be done).
b 802.1x Wireless Setup: is set to Optional (if non-RADIUS clients need access
too) or Required (if only RADIUS clients are to be allowed).
c Click on Apply.
Click Security on the 802.11b/g radio from the left frame page Menu.
10 Make sure the following settings are set from the Security page:
a
b
c
d
Authentication is set to Open System.
Encryption is Enabled.
WPA Configuration is Checked to “Allow only WPA Clients”.
Cipher Mode is set to AES/TKIP/WEP (WEP Cipher Mode is intended ONLY
for support of legacy clients. If only WPA clients are on the network, choose
AES or TKIP for increased security).
e WEP Configuration has at least one valid WEP key.
45
f WPA Key Management set to WPA Authentication over 802.1x.
g Click on Apply.
11 The Access Point is now configured for WPA Authentication over 802.1x.
HOW TO SETUP THE ACCESS POINT FOR WPA WITH
PRE-SHARED (PSK) KEY
1
Using the Wireless Infrastructure Device Manger access the configuration screen
for the AP8x00/AP82x0.
2
Enter your User Name and Password and click LOGIN (Default: admin with no
password).
3
Select Advanced Setup.
4
Choose Authentication from the left frame page Menu.
5
Make sure the following settings are set on the Authentication page:
6
a MAC Authentication is Disabled. (if Local or RADIUS MAC Authentication
is chosen MAC address filtering or authentication, respectively, will be done
before the 802.1x authentication. Therefore, these setups must be validated
individually and verified functional before 802.1x can be done).
b 802.1x Wireless Setup: is set to Disabled or Optional (if RADIUS clients need
access too).
c Click on Apply.
Click Security on the 802.11a/b/g radio from the left frame page Menu.
7
Make sure the following settings are set from the Security page:
a
b
c
d
8
Authentication is set to Open System.
Encryption is Enabled.
WPA Configuration is Checked to “Allow only WPA Clients”.
Cipher Mode is set to AES/TKIP/WEP (WEP Cipher Mode is intended ONLY
for support of legacy clients. If only WPA clients are on the network, choose
AES or TKIP for increased security).
e WEP Configuration has at least one valid WEP key (select the appropriate key
length, key type, and key index).
f WPA Key Management select WPA Pre-shared Key (PSK) and Key Type.
g Enter the WPA PSK.
h Click on Apply.
The Access Point is now configured for WPA Pre-shared Key.
46
WPA CONFIGURATION FOR WINDOWS XP
The following table shows how to configure the access point to support the various
authentication and encryption options available for Windows XP Wireless Zero
Configuration.
The following notes apply to configuring the access point for WPA under Windows
XP:
•
A WPA-capable wireless network interface card is required.
•
The Windows XP Support Patch for Wireless Protected Access, which you can
download from the Microsoft Web site, is required.
•
To allow WEP clients, clear the WPA Configuration Required check box and enter
an appropriate WEP key.
•
For all WPA configurations, 802.1x must be enabled on the Authentication page.
Windows XP Wireless Zero
Configuration
Authentication
Open
Shared
WPA
Access Points 7250/8250/8500/8750
Encryption
Authentication
Encryption
Other
Disabled
Open System
Disable
WEP
Open System
Enable
Enter static keys under
WEP Configuration
Disabled
Not available
WEP
Shared Key
Enable
Enter static keys under
WEP Configuration
AES
Not available on 8200
TKIP
Open System
Enable
WPA Configuration:
Required
Multicast Cipher Mode:
TKIP
WPA Key Management:
WPA 802.1x
WEP
Open System
Enable
WPA Configuration:
Required
Multicast Cipher Mode:
WEP
WPA Key Management:
WPA 802.1x
47
Windows XP Wireless Zero
Configuration
Authentication
WPA-PSK
Access Points 7250/8250/8500/8750
Encryption
Authentication
Encryption
Other
AES
Not available on 8200
TKIP
Open System
Enable
WPA Configuration:
Required
Multicast Cipher Mode:
TKIP
WPA Key Management:
WPA-PSK
Select Key Type and enter
Pre-Shared Key
WEP
Open System
Enable
WPA Configuration:
Required
Multicast Cipher Mode:
WEP
WPA Key Management:
WPA-PSK
Select Key Type and enter
Pre-Shared Key
48
4
TROUBLESHOOTING
If you have difficulty with the 3Com Wireless LAN access point, first check the
following items in the configuration:
•
Radio Settings page: Ensure that the SSID is the same on clients and the
access point.
•
Security page: Ensure that Encryption is the same on clients and the access point.
•
Authentication page: Ensure that the Local MAC Authentication System Default is
set to Allow. Ensure that 802.1x Authentication Settings are correct.
•
TCP/IP Settings page: If the DHCP Client is set to Disabled, then ensure that the
access point IP Address is within the same subnet as the wired LAN.
If necessary, reset the access point to the factory defaults.
Try the solutions in the following table. If you need further assistance, contact 3Com
Technical Support through the following Web page:
http://www.3com.com/products/en_US/supportindex.jsp
Symptom
Solutions
Access point does not
power up.
Make sure the Ethernet cable is plugged into the port labeled
To Access Point on the power brick.
Check for a faulty access point power supply.
Check for a failed AC power supply.
Access point powers up, but
has no connection to the wired
network.
Make sure that the Ethernet cable is plugged into the port
labeled To Hub/Switch on the power brick.
Verify the network wiring and topology for proper
configuration. Check that the cables used are the proper type.
49
Symptom
Solutions
No operation.
Verify the access point configuration.
Review access point firmware revisions and update firmware
if necessary.
Make sure that there are no duplicate IP addresses on the
network. Unplug the access point and ping the assigned
address to make sure that no other device responds to that
address.
Access point powers up, but
Confirm that the service area on the access point matches that
does not associate with wireless on the clients.
clients.
Verify that the clients are operating correctly.
Make sure that security settings on the access point match
those on the clients.
Make sure that the access point antennas are positioned
properly.
Check the range and move clients closer if necessary.
Mobile users do not have
roaming access to the access
point.
Make sure that all access points and wireless devices in the
ESS in which mobile users can roam are configured to the
same WEP setting, SSID, and authentication settings.
Slow or erratic performance.
Try changing the wireless channel on the access point.
Check the access point antennas, connectors, and cabling for
loose connections.
Check the wired network topology and configuration
for malfunctions.
Running on a computer
connected to the wired LAN,
the 3Com Device Manager
cannot find an access point.
The 3Com Device Manager cannot discover devices across
routers. Make sure that the computer is connected on the same
segment as the access point.
After you specify an IP address
for an access point, the 3Com
Device Manager continues to
point to the old IP address
when you select the access
point in the Wireless Network
Tree.
In the 3Com Device Manager window click the Refresh
button to refresh the Wireless Network Tree. Then click the
access point in the Wireless Network Tree and click
Properties. The IP address you specified is now listed. If you
want to continue configuring the access point,
click Configure.
50
Symptom
Solutions
While you are configuring the
access point, the Configuration
Management System stops
responding.
To maintain wireless association, the service area and the
security settings on the client and the access point must
match exactly. Therefore, if you are associated with the
access point that you are configuring and you change the
access point service area or security, make sure to change the
client service area to match.
If you change the IP address and save the change, you cannot
continue to configure the access point using the old IP
address. Therefore, if you want to continue configuring this
access point after you save this change, you must do the
following:
1 Close your browser.
2 Return to the 3Com Device Manager Wireless Network
Tree and click Refresh.
3 Select the access point and click Configure to start a new
configuration session.
The access point cannot be
configured using the Web
browser.
Reset the access point (push the reset button located on the
rear panel of the access point).
51
A
TECHNICAL SUPPORT
OBTAINING SUPPORT FOR YOUR PRODUCT
REGISTER YOUR PRODUCT TO GAIN SERVICE BENEFITS
To take advantage of warranty and other service benefits, you must first register your
product at http://eSupport.3com.com/. 3Com eSupport services are based on
accounts that you create or have authorization to access. First time users must apply for
a user name and password that provides access to a number of eSupport features
including Product Registration, Repair Services, and Service Request.
PURCHASE VALUE-ADDED SERVICES
To enhance response times or extend warranty benefits, contact 3Com or your
authorized 3Com reseller. Value-added services can include 24x7 telephone technical
support, software upgrades, onsite assistance or advance hardware replacement.
Experienced engineers are available to manage your installation with minimal
disruption to your network. Expert assessment and implementation services are offered
to fill resource gaps and ensure the success of your networking projects. More
information on 3Com Extended Warranty and Professional Services is available at
http://www.3com.com/
WHERE TO GO FOR HELP
Contact your authorized 3Com reseller or 3Com for additional product and support
information. You will find support tools posted on the 3Com web site at
http://www.3com.com/
TROUBLESHOOT ONLINE
3Com Knowledgebase helps you troubleshoot 3Com products. This query-based
interactive tool is located at http://knowledgebase.3com.com/ and contains thousands
of technical solutions written by 3Com support engineers.
52
ACCESS SOFTWARE DOWNLOADS
Software Updates are the bug fix / maintenance releases for the version of software
initially purchased with the product. In order to access these Software Updates you
must first register your product on the 3Com web site at http://eSupport.3com.com/
First time users will need to apply for a user name and password. A link to softwae
downloads can be found from this http://eSupport.3com.com/ page, or located from
the www.3com.com home page.
Software Upgrades are the software releases that follow the software version included
with your original product. In order to access upgrades and related documentation you
must first purchase a service contract from 3Com or your reseller.
CONTACT US
3Com offers telephone, e-mail and internet access to technical support and repair
services. To access these services for your region, use the appropriate telephone
number, URL or e-mail address from the list below. You will find a current directory of
support telephone numbers posted on the 3Com web site at
http://csoweb4.3com.com/contactus/
TELEPHONE TECHNICAL SUPPORT AND REPAIR
To obtain telephone support as part of your warranty and other service benefits, you
must first register your product at http://eSupport.3com.com/
When you contact 3Com for assistance, please have the following information ready:
To send a product directly to 3Com for repair, you must first obtain a return
authorization number (RMA). Products sent to 3Com, without authorization numbers
clearly marked on the outside of the package, will be returned to the sender unopened,
at the sender’s expense. If your product is registered and under warranty, you can
obtain an RMA number online at http://eSupport.3com.com/ First time users will
need to apply for a user name and password.
These numbers are correct at the time of publication. Find a current directory of
support telephone numbers posted on the 3Com web site at
http://csoweb4.3com.com/contactus/
53
Country
Asia, Pacific Rim
Australia
Hong Kong
India
Indonesia
Japan
Malaysia
New Zealand
Pakistan
Telephone Number
Country
Telephone Number
Telephone Technical Support and Repair
1 800 678 515
800 933 486
+61 2 9424 5179 or
000800 650 1111
001 803 61009
00531 616 439 or
03 5977 7991
1800 801 777
0800 446 398
+61 2 9937 5083
Philippines
P.R. of China
1235 61 266 2602 or
1800 1 888 9469
800 810 3033
Singapore
S. Korea
Taiwan
Thailand
800 6161 463
080 333 3308
00801 611 261
001 800 611 2000
You can also obtain support in this region using the following email:
apr_technical_support@3com.com
Or request a repair authorization number (RMA) by fax using this number: + 65 543 6348
Europe, Middle East, and Africa Telephone Technical Support and Repair
From anywhere in these regions, call: +44 (0)1442 435529
You can also obtain support in this region using the following URL:
http://emea.3com.com/support/email.html
From the following countries, you may use the numbers shown:
Austria
Belgium
Denmark
Finland
France
Germany
Hungary
Ireland
Israel
Italy
01 7956 7124
70 700 770
7010 7289
01080 2783
0825 809 622
01805 404 747
06800 12813
01407 3387
1800 945 3794
199 161346
Luxembourg
Netherlands
Norway
Poland
Portugal
South Africa
Spain
Sweden
Switzerland
U.K.
54
342 0808128
0900 777 7737
815 33 047
00800 441 1357
707 200 123
0800 995 014
9 021 60455
07711 14453
08488 50112
0870 909 3266
Latin America: Telephone Technical Support and Repair.
You can obtain support in this region using the following URLs: Latin America.
Spanish speakers, enter the URL: http://lat.3com.com/lat/support/form.html
Portuguese speakers, enter the URL: http://lat.3com.com/br/support/form.html
English speakers in Latin America should send e-mail to: lat_support_anc@3com.com
Or call using the following numbers:
Antigua
Argentina
Aruba
Bahamas
Barbados
Belize
Bermuda
Bonaire
Brazil
Cayman
Chile
Colombia
Costa Rica
Curacao
Dominican Republic
Ecuador
North America Telephone
1 800 988 2112
0 810 444 3COM
1 800 998 2112
1 800 998 2112
1 800 998 2112
52 5 201 0010
1 800 998 2112
1 800 998 2112
0800 13 3COM
1 800 998 2112
AT&T +800 9982112
AT&T+800 998 2112
AT&T+800 998 2112
1 800 998 2112
AT&T+800 998 2112
AT&T+800 998 2112
Guatemala
Haiti
Honduras
Jamaica
Martinique
Mexico
Nicaragua
Panama
Paraguay
Peru
Puerto Rico
Salvador
Trinidad and Tobago
Uruguay
Venezuela
Virgin Islands
1 800 876 3266
Technical Support and Repair
55
AT&T +800 998 2112
57 1 657 0888
AT&T +800 998 2112
1 800 998 2112
57 1 657 0888
01 800 849CARE
AT&T +800 998 2112
AT&T +800 998 2112
AT&T +800 998 2112
AT&T +800 998 2112
1 800 998 2112
AT&T +800 998 2112
1 800 998 2112
AT&T +800 998 2112
AT&T +800 998 2112
57 1 657 0888
REGULATORY COMPLIANCE INFORMATION
3Com Wireless LAN Access Point 7250 (Model WL-455)
FCC Radio-Frequency Exposure Notice
This device generates and radiates radio-frequency energy. In order to comply with FCC radio-frequency radiation exposure
guidelines for an uncontrolled environment, this equipment has to be installed and operated while maintaining a minimum body to
antenna distance of 1 meter.
This product does not contain any user serviceable components. Any unauthorized product changes or modifications will
invalidate 3Com’s warranty and all applicable regulatory certifications and approvals. This product must be installed by a
professional technician/installer.
FCC Part 15 Notice (Applicable to Use Within the USA)
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not
cause harmful interference, and (2) this device must accept any interference received, including interference that may cause
undesired operation.
WARNING: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15
of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential
installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance
with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference
will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which
can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of
the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from the one which the receiver is connected to.
• Consult the dealer or an experienced radio/TV technician for help.
The user may find the following booklet prepared by the Federal Communications Commission helpful:
The Interference Handbook
This booklet is available from the U.S. Government Printing Office, Washington, D.C. 20402. Stock No. 004-000-00345-4.
Manufacturer’s Declaration of Conformity
3Com Corporation
350 Campus Drive
Marlborough, MA 01752-3064
(508) 323-5000
Declares that the product:
Date: December, 2003
Brand Name: 3Com Corporation
Model Number: WL-455
Equipment Type: Wireless LAN Access Point
Complies with Part 15 of the FCC rules. Operation is subject to the following two conditions: (1) this device may not cause
harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired
operation.
Industry Canada Notice (Applicable to Use Within Canada)
This device complies with Canadian RSS-210.
To prevent radio interference to the licensed service, this device is intended to be operated indoors and away from windows to
provide maximum shielding. Equipment (or its transmit antenna) that is installed outdoors is subject to licensing.
The installer of this radio equipment must ensure that the antenna is located or pointed such that it does not emit RF field in excess
of Health Canada limits for the general population; consult Safety Code 6, obtainable from Health Canada’s web site
www.hc-sc.gc.ca/rpb.
Avis de Conformité à la Réglementation d’Industrie Canada
Pour empêcher toute interférence aux services faisant l'objet d'une licence, cet appareil doit être utilisé à l'intérieur seulement et
devrait être placé loin des fenêtres afin de fournir un écran de blindage maximal.
L’installateur du présent matériel radio doit s’assurer que l’antenne est située ou pointée de manière à ce que cette dernière
n’émette pas de champs radioélectriques supérieurs aux limites specifées par Santé Canada pour le grand public; consulter le Code
de sécurité 6, disponible sur le site Web de Santé Canada, à l’adresse suivante: www.hc-sc.gc.ca/rpb.
Industry Canada (IC) Emissions Compliance Statement
This Class B digital apparatus complies with Canadian ICES-003.
Avis de Conformité à la Réglementation d’Industrie Canada
Cet appareil numérique de la classe B est conform à la norme NMB-003 du Canada.
European Community—CE Notice (WL-455, 802.11g Radio Module)
Marking by the symbol:
indicates compliance with the essential requirements of Directive 73/23/EC and the essential requirements of articles 3.1(b), 3.2
and 3.3 of Directive 1999/5/EC. Such marking is indicative that this equipment meets or exceeds the following
technical standards:
• EN 300 328-2—Electromagnetic compatibility and Radio spectrum Matters (ERM); Wideband Transmission systems; data
transmission equipment operating in the 2,4 GHz ISM band and using spread spectrum modulation techniques
• EN 301 489-17—Electromagnetic compatibility and Radio Spectrum Matters (ERM); Electromagnetic Compatibility (EMC)
standard for radio equipment and services; Part 17: Specific conditions for 2.4 GHz wideband transmission systems and 5 GHz
high performance RLAN equipment.
• EN 60950—Safety of information technology equipment, including electrical business equipment.
Marking by the symbol:
indicates that usage restrictions apply.
• To ensure compliance with local regulations, be sure to select the country in which the access point in installed.
• This product can be used as shown in the table below:
Countries:
Belgium
Allowed Operation:
Indoor: Channels 1-13
Outdoor: Channel 13 only
Countries:
Allowed Operation:
France
Metropolitan Departments:
Indoor: Channels 1-13
Outdoor: Channels 1-7 only
Guadeloupe, Martinique, St Pierre et
Miquelon, Mayotte:
Indoor: Channels 1-13
Outdoor: Channels 1-13
Reunion et Guane:
Indoor: Channels 1-13
Outdoor: Channels 5-13 only
Italy
Indoor: Channels 1-13
Outdoor Requires license from national
spectrum authority for outdoor operation.
Austria, Denmark, Finland, Germany, Greece,
Iceland, Ireland, Liechtenstein, Luxembourg,
The Netherlands, Norway, Portugal, Spain,
Sweden, Switzerland, The United Kingdom.
Indoor: Channels 1-13
Outdoor: Channels 1-13
Safety Compliance Notice
This device has been tested and certified according to the following safety standards and is intended for use only in Information
Technology Equipment which has been tested and certified to these or other equivalent standards:
• UL Standard 60950, 3rd Edition / CSA C22.2 No. 60950-00
• IEC 60950
• EN 60950
Published December, 2003
User Guide Version 1
Index
Numbers
3Com 3CDaemon Server Tool - - - - - - - 3Com Network Supervisor - - - - - - - - - 3Com Passphrase encryption - - - - - - - - 3Com Wireless Infrastructure Device Manager
802.1x reauthentication refresh rate - - - - - 802.1x setup - - - - - - - - - - - - - - - - -
-
A
access control, - - - - - - - access point
installation - - - - - - - IP address, troubleshooting
resetting - - - - - - - - accounting - - - - - - - - - ad hoc - - - - - - - - - - - adapter, choosing - - - - - administration - - - - - - - administration tool - - - - - advanced setup - - - - - - antenna - - - - - - - - - - comparison data - - - - options - - - - - - - - standard detachable - - AP management filter - - - AP status - - - - - - - - - authentication - - - - - - - local MAC - - - - - - - MAC - - - - - - - - - open system - - - - - - RADIUS MAC - - - - shared key - - - - - - - automatic channel selection -
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
- - -22
- - -22
- - -43
- 22, 24
- - -32
- - -31
- - - - - - - - - - - - - - - - - - - - - - - - - - -41
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
- - -10
- - -50
- - -37
- - -30
- - - 6
- - -25
- - -36
- - -24
- - -28
- 13, 20
- - -20
- - -20
- - -13
- - -34
- - -38
- 30, 40
- - -32
- - -31
- - -40
- - -31
- - -40
- - -39
B
backup configuration - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -36
basic configuration - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -27
beacon interval - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -39
bridge
resetting - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -29
broadcast key refresh rate - - - - - - - - - - - - - - - - - - - - - - - - - - - - -31
C
cable - - - - - - - - - - - - - change password - - - - - - - - changing passwords
128-bit Dynamic Security Link
channel - - - - - - - - - - - - choosing a NIC - - - - - - - - community name - - - - - - - configuration - - - - - - - - - advanced - - - - - - - - - basic - - - - - - - - - - - - login - - - - - - - - - - - - Configuration Management System
configuration, backup and restore Configure button - - - - - - - - configuring encryption - - - - - connecting
power - - - - - - - - - - - contact - - - - - - - - - - - - country code - - - - - - - - - - -
- - - - - - - - - - - - - - - - - - - - - - - 11, 14
- - - - - - - - - - - - - - - - - - - - - - - - -36
- - - - - - - - - - - - - - - - - - - - - - - - -26
D
data
encryption - - - transfer speed - date and time settings
default
gateway - - - - device
configuring - - device manager - - launching - - - DHCP client - - - - -
-
- - - - - - - - - - - - - - - - - - - - - - - - -10
- - - - - - - - - - - - - - - - - - - - - - - - -36
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
- - -41
- - -39
- - -25
- - -36
- - -24
- - -28
- - -27
- - -26
- 25, 26
- - -36
- - -25
- - -41
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -41
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -39
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -38
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -28
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
- 25, 26
- - -24
- - -24
- - -28
Dynamic Security Link 128-Bit - - - - - - - - - - - - - - - - - - - - - - - - - - -40
E
encryption
3Com Passphrase
configuring - - shared key - - - WEP - - - - - WPA - - - - - Ethernet cable - - - Ethernet type filter - event logs - - - - - -
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
- - -43
- - -41
- - -43
- 41, 43
- 41, 42
- - -10
- - -35
- - -38
F
filter control - - - - firmware upgrade - flat surface installation
fragment length - - -
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-33
-36
-19
-39
G
gateway, default - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -28
glossary of wireless networking terms - - - - - - - - - - - - - - - - - - - - - - - - 8
I
identification - - - - - - - - - IEEE 802.3af power-over-Ethernet
infrastructure configuration - - - installation - - - - - - - - - - access point - - - - - - - - antenna - - - - - - - - - - cable - - - - - - - - - - - flat surface - - - - - - - - - location - - - - - - - - - - power - - - - - - - - - - - requirements - - - - - - - - software utilities - - - - - - wall mount - - - - - - - - - IP address - - - - - - - - - - - -
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
- - -28
- - -14
- - - 6
- - -10
- - -10
- - -13
- - -10
- - -19
- - -12
- - -11
- - -10
- 22, 23
- - -18
- - -28
refreshing after changing - - - - - - - - - - - - - - - - - - - - - - - - - - - -25
troubleshooting - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -50
L
launching the device manager
LEDs - - - - - - - - - - - local bridge filter - - - - - local MAC authentication - locating
devices - - - - - - - - MAC address - - - - - location
configuration parameter for installation - - - - - log - - - - - - - - - - - - login - - - - - - - - - - - M
MAC address
locating - - - - - - recording - - - - - use in locating devices
MAC authentication - - maximum station data rate
mounting
on a wall - - - - - - plate - - - - - - - - -
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-24
-17
-34
-32
- - - - - - - - - - - - - - - - - - - - - - - - - 24, 25
- - - - - - - - - - - - - - - - - - - - - - - - - - -33
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-36
-12
-37
-26
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
- - -33
- - -13
- 24, 25
- - -31
- - -39
- - - - - - - - - - - - - - - - - - - - - - - - - - - - -18
- - - - - - - - - - - - - - - - - - - - - - - - - - - - -18
N
native VLAN ID - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -34
network configuration and planning - - - - - - - - - - - - - - - - - - - - - - - - - 6
NIC, choosing - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -25
O
open system - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -40
P
passphrase - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -43
password - - - - - - - - - - - - - - - - - - changing for 128-bit Dynamic Security Link planning a network - - - - - - - - - - - - - - power - - - - - - - - - - - - - - - - - - - - connecting - - - - - - - - - - - - - - - - requirements - - - - - - - - - - - - - - - supply, 3Com integrated - - - - - - - - - power-over-Ethernet - - - - - - - - - - - - - preamble - - - - - - - - - - - - - - - - - - Pre-IP Configuration Wizard - - - - - - - - - Properties button - - - - - - - - - - - - - - - -
-
R
radio channel - - - - - - - - - - radio interface - - - - - - - - - - RADIUS
accounting - - - - - - - - - - RADIUS Authentication Setup Steps
RADIUS MAC authentication - - reauthentication refresh rate - - - recording MAC address - - - - - Refresh button - - - - - - - - - - resetting a bridge - - - - - - - - resetting the access point - - - - - restore configuration - - - - - - - RF preamble - - - - - - - - - - - roaming - - - - - - - - - - - - - RTS threshold - - - - - - - - - - S
safety information - - - - secure web server connection
session key refresh rate - - setting the time and date - settings
TCP/IP - - - - - - - Setup Wizard - - - - - - setup, 802.1x - - - - - - -
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
- - -36
- - -41
- - - 6
- - -11
- - -14
- - -11
- 14, 16
- - -14
- - -40
- 25, 26
- - -25
- - - - - - - - - - - - - - - - - - - - - - - -39
- - - - - - - - - - - - - - - - - - - - - - - -38
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-30
-44
-31
-32
-13
-25
-29
-37
-36
-40
- 7
-40
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-11
-29
-31
-38
- - - - - - - - - - - - - - - - - - - - - - - - - - - -28
- - - - - - - - - - - - - - - - - - - - - - - - - - - -27
- - - - - - - - - - - - - - - - - - - - - - - - - - - -31
shared key - - - - - - - - - - - - - - - - - shared key encryption - - - - - - - - - - - Simple Network Management Protocol (SNMP)
software utilities, installing - - - - - - - - - SSID - - - - - - - - - - - - - - - - - - - stations status - - - - - - - - - - - - - - - statistics, accounting - - - - - - - - - - - - status - - - - - - - - - - - - - - - - - - - subnet mask - - - - - - - - - - - - - - - - system configuration - - - - - - - - - - - - system log - - - - - - - - - - - - - - - - - -
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
- - -40
- - -43
- - -35
- 22, 23
- - -39
- - -38
- - -30
- - -38
- - -28
- - -24
- - -37
T
TCP/IP settings - - terminology - - - - time and date settings
transmission power trap destination - - troubleshooting - - -
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-28
- 8
-38
-39
-36
-49
U
upgrading firmware - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -36
user access list
128-bit Dynamic Security Link - - - - - - - - - - - - - - - - - - - - - - - - -41
V
VLAN - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -34
VLAN ID - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -34
W
wall mount installation - - - - - - - - - web server, secure connection - - - - - WEP - - - - - - - - - - - - - - - - - Windows XP Wireless Zero Configuration
wireless network tree - - - - - - - - - - WPA - - - - - - - - - - - - - - - - - -
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
- - -18
- - -29
- 41, 43
- - -46
- - -24
- 41, 42
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