Cisco Aironet 340 Series Anleitung zur Verwendung

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Release Notes for Cisco Aironet 340 and 350

Series Access Points and 350 Series Bridges

Running Firmware Version 12.01T1

January 20, 2003

These release notes describe features and caveats for Cisco Aironet 340 and 350 Series Access Points and

350 Series Bridges running firmware version 12.01T1.

Contents

•Introduction, page 2

•Installation Notes, page 2

•Limitations and Restrictions, page 3

•Important Notes, page 6

•Caveats, page 7

•Troubleshooting, page 10

•Obtaining Documentation, page 11

•Obtaining Technical Assistance, page 12

Release Notes for Cisco Aironet 340 and 350 Series Access Points and 350 Series Bridges Running Firmware Version 12.01T1

OL-3740-01

Introduction

A Cisco Aironet Access Point is a wireless LAN transceiver that can act as the connection point between

wireless and wired networks or as the center point of a standalone wireless network. Cisco Aironet

Bridges are wireless LAN transceivers that connect two or more remote networks into a single LAN.

The access point and bridge use a browser-based management system. The system settings are on web

pages in the system firmware. You use your Internet browser to view and adjust the system settings.

Installation Notes

You can find the latest release of access point and bridge firmware at this URL:

http://www.cisco.com/public/sw-center/sw-wireless.shtml

Installation in Environmental Air Space

Cisco Aironet 350 Series Bridges and metal-case access points are suitable for use in environmental air

space in accordance with Section 300-22(c) of the National Electrical Code.

Caution The Cisco Aironet Power Injector has a smaller operating temperature range (32 to 104oF; 0 to 40oC)

than the 350 series bridge and metal-case access point. The power injector is not intended for use in

extremely high or low temperatures or in environmental air spaces, such as above suspended ceilings.

Antenna Installation

For instructions on the proper installation and grounding of external antennas, refer to the National Fire

Protection Association’s NFPA 70, National Electrical Code, Article 810, and the Canadian Standards

Association’s Canadian Electrical Code, Section 54.

Warning

Do not locate the antenna near overhead power lines or other electric light or power circuits, or

where it can come into contact with such circuits. When installing the antenna, take extreme care

not to come into contact with such circuits, as they may cause serious injury or death.

Power Considerations

Caution The operational voltage range for 350 series access points and bridges is 24 to 60 VDC, and the nominal

voltage is 48 VDC. Voltage higher than 60 VDC can damage the equipment.

Caution Cisco Aironet power injectors are designed for use with 350 series access points and 350 series bridges

only. Do not use the power injector with any other Ethernet-ready device. Using the power injector with

other Ethernet-ready devices can damage the equipment.

Release Notes for Cisco Aironet 340 and 350 Series Access Points and 350 Series Bridges Running Firmware Version 12.01T1

OL-3740-01

Limitations and Restrictions

System Requirements

You must have a 340 or 350 series access point or a 350 series bridge to install firmware version 12.01T1.

Version Supported

Your access point must be running firmware version 10.x or later to install firmware version 12.01T1.

Your bridge must be running version 11.07 or later to install firmware version 12.01T1.

Upgrading to a New Firmware Release

Determining the Firmware Version

The firmware version number is in the upper-left corner of most management screens in the web-browser

interface and at the top of the home (Summary Status) page in the command-line interface.

Upgrade Procedure

For instructions on installing access point and bridge firmware:

1. Follow this link to the Cisco Aironet documentation home page:

http://www.cisco.com/univercd/cc/td/doc/product/wireless/index.htm

2. Follow this path to the product, document, and chapter:

Aironet 350 Series Wireless LAN Products > Cisco Aironet 350 Series Access Points > Cisco

Aironet Access Point Software Configuration Guide > Managing Firmware Configurations >

Updating Firmware

3. Follow this link to the Software Center on Cisco.com and download firmware version 12.01T1:

http://www.cisco.com/public/sw-center/sw-wireless.shtml

Note To upgrade firmware from a file server, you must enter settings on the access point’s or bridge’s FTP

Server Setup page. Refer to chapter 6 in the Cisco Aironet Access Point Software Configuration Guide

for more information.

Limitations and Restrictions

This section describes limitations and restrictions for 340 and 350 series access points and 350 series

bridges.

Release Notes for Cisco Aironet 340 and 350 Series Access Points and 350 Series Bridges Running Firmware Version 12.01T1

OL-3740-01

Limitations and Restrictions

Cisco Aironet 350 Series Bridges Incompatible with 340 Series Bridges

Cisco Aironet 340 and 350 Series Bridges can be connected to the same LAN segments, but they cannot

communicate wirelessly. Although you can disable STP on non-root 350 series bridges, 350 and 340

series bridges are not designed to interoperate. If you use both 340 and 350 series bridges on your

network, make sure the 340 series bridges have radio bridge links only to other 340 series bridges, and

that 350 series bridges have radio bridge links only to other 350 series bridges.

Removing Power During Firmware Update Can Corrupt Radio Firmware

When you update the firmware on an access point or bridge, allow the unit to finish its start-up sequence

before removing power. If you update the firmware and remove power before the unit finishes the

start-up sequence, the radio firmware might be corrupted, making the unit inoperable. If the radio

firmware is corrupted, the radio indicator (the bottom of the three indicators on top of the access point

or bridge) lights steady red, and the following error message appears when the access point or bridge

starts up:

Failed to start driver for port “awc0” (errno=0x006d0002)

If the radio firmware is corrupted, you should try to reset the unit to factory defaults using the :resetall

command in the CLI; see chapter 9 of the Cisco Aironet Access Point Software Configuration Guide for

instructions on resetting the access point. If the unit cannot be reset to defaults, you must return the unit

to Cisco for service.

You can safely remove power after a firmware update when the configuration management pages

reappear in the command-line or web-browser interfaces, or when the three status indicators on top of

the unit complete the following pattern:

1. All three indicators are steady green, meaning that the access point is beginning to update the

firmware.

2. The middle indicator is steady green and the top and bottom indicators are off, indicating that the

access point or bridge is updating the radio firmware.

When the middle indicator blinks or the top and bottom indicators blink, you can remove power.

EAP Authentication Requires Matching 802.1x Protocol Drafts

Note This section applies to wireless networks set up to use LEAP. If you do not use LEAP on your wireless

network, you can skip this section.

Wireless client devices use Extensible Authentication Protocol (EAP) to log onto a network and generate

a dynamic, client-specific WEP key for the current logon session. If your wireless network uses WEP

without EAP, client devices use the static WEP keys entered in the Aironet Client Utilities.

If you use Network-EAP authentication on your wireless network, your client devices and access points

must use the same 802.1x protocol draft. For example, if the radio firmware on the client devices that

will associate with an access point is 4.16, the access point should be configured to use Draft 8 of the

Release Notes for Cisco Aironet 340 and 350 Series Access Points and 350 Series Bridges Running Firmware Version 12.01T1

OL-3740-01

Limitations and Restrictions

802.1x protocol. Table 1 lists firmware versions for Cisco Aironet products and the draft with which they

comply.

Note Draft standard 8 is the default setting in firmware version 11.05 and earlier, and it might remain in effect

when you upgrade the firmware to version 11.06 or later. Check the setting on the Authenticator

Configuration page in the management system to make sure the best draft standard for your network is

selected.

Use the Authenticator Configuration page in firmware version 11.06 or later to select the draft of the

802.1x protocol the access point or bridge radio should use. Follow these steps to set the draft for your

access point or bridge:

Step 1 Browse to the Authenticator Configuration page in the access point management system:

a. On the Summary Status page, click Setup.

b. On the Setup page, click Security.

c. On the Security Setup page, click Authentication Server.

Step 2 Use the 802.1x Protocol Version (for EAP authentication) pull-down menu to select the draft of the

802.1x protocol the access point or bridge radio should use. Menu options include:

•Draft 7—No radio firmware versions compliant with Draft 7 have LEAP capability, so you

should not need to select this setting.

•Draft 8—Select this option if LEAP-enabled client devices that associate with this access point

or bridge use radio firmware versions 4.13, 4.16, or 4.23.

Table 1 802.1x Protocol Drafts and Compliant Client Firmware

Firmware Version Draft 7 Draft 8 802.1x-2001

PC/PCI cards 4.13 — x —

PC/PCI cards 4.16 — x —

PC/PCI cards 4.23 — x —

PC/PCI cards 4.25 and later — — x

WGB34x/352 8.58 — x —

WGB34x/352 8.61 or later — — x

AP34x/35x 11.05 and earlier — x —

AP34x/35x 11.06 and later — x x

AP34x/35x 11.07 and later — x x

AP34x/35x and BR35x 11.21

through 12.01T

—x x

Release Notes for Cisco Aironet 340 and 350 Series Access Points and 350 Series Bridges Running Firmware Version 12.01T1

OL-3740-01

Important Notes

•802.1x-2001 (formerly Draft 10)—This is the default setting in firmware versions 11.06 and

later. Select this option if client devices that associate with this access point or bridge use

Microsoft Windows XP EAP authentication or if LEAP-enabled client devices that associate

with this access point or bridge use radio firmware version 4.25 or later.

Step 3 Click Apply or OK to apply the setting. The access point or bridge reboots.

Select WEP Key 1 as Transmit Key for EAP Authentication

If you use Network-EAP as the authentication type on your wireless network, you must select key 1 as

the transmit key on the access point or bridge AP Radio Data Encryption page. The access point or bridge

uses the WEP key you enter in key slot 1 to encrypt multicast and broadcast data signals that it sends to

EAP-enabled client devices. Because the access point or bridge transmits the WEP key used for multicast

messages to the EAP-enabled client device during the EAP authentication process, that key does not

have to appear in the EAP-enabled device’s WEP key list. The access point or bridge uses a dynamic

WEP key to encrypt unicast messages to EAP-enabled clients. When you set up a non-root bridge or

repeater access point to authenticate as a LEAP client, the bridge or repeater derives a dynamic WEP

key and uses it to communicate with the root bridge or access point. Bridges and repeaters not set up for

LEAP authentication use static WEP keys when communicating with other bridges and access points.

Note If you do not use EAP authentication on your wireless network, you can select any WEP key as the

transmit key. If you use EAP authentication and you enable broadcast key rotation, you can enable WEP

without entering WEP keys.

Important Notes

This section lists important information about access points and bridges running firmware version

12.01T1.

Reboot of Workgroup Bridges Required When Allowing More Than 20

With firmware version 12.01T1, you can select no for the Classify Workgroup Bridges as Network

Infrastructure setting on the AP/Root Radio Advanced page to allow up to 50 workgroup bridges to

associate to the access point or bridge. After selecting no for this setting, you must reboot workgroup

bridges associated to the access point or bridge.

Cisco Discovery Protocol Re-Enabled for Individual Interfaces on Reboot

The Cisco Discovery Protocol (CDP) feature is enabled by default, and CDP is enabled for each of the

access point’s or bridge’s individual interfaces by default. However, if you disable CDP for one of the

individual interfaces, the access point or bridge re-enables CDP for that interface when it reboots. If you

disable CDP completely, the access point or bridge does not re-enable CDP on reboot.

Release Notes for Cisco Aironet 340 and 350 Series Access Points and 350 Series Bridges Running Firmware Version 12.01T1

OL-3740-01

Caveats

Adding or Deleting Proxy Mobile IP AAPs

If you need to add or delete proxy Mobile IP authoritative access points, you must disable proxy Mobile

IP before changing the configuration. Follow these steps.

Step 1 Browse to the Setup page.

Step 2 In the Services section, click Proxy Mobile IP. The Proxy Mobile IP Setup page appears.

Step 3 Click General. The Proxy Mobile IP General page appears.

Step 4 Change the Enable Proxy Mobile IP setting to no.

Step 5 Add or delete AAPs as necessary.

Step 6 Change the Enable Proxy Mobile IP setting to yes.

Unexpected Results on Lost Ethernet

When backbone connectivity is lost on an access point running version 12.01T1, the device switches to

repeater mode. Switch to Repeater mode is the default setting for this condition. Therefore, if the access

point’s role in your network is not a repeater access point, make sure you connect it to your wired

network before booting it up. If you do not connect the access point to your network, it switches to the

repeater mode when it fails to detect the presence of an Ethernet connection. When this occurs, wireless

client devices are unable to connect and you cannot correct the problem using a wireless client. The only

way you can change the configuration is through a serial connection using the access point’s command

line interface.

Caveats

This section lists open and resolved software issues in firmware version 12.01T1.

Getting Bug Information on Cisco.com

If you are a registered Cisco user, you can use the Cisco TAC Software Bug Toolkit, which consists of

three tools (Bug Navigator, Bug Watcher, and Search by Bug ID Number) that help you identify existing

bugs (or caveats) in Cisco software products.

Access the TAC Software Bug Toolkit at http://www.cisco.com/support/bugtools/.

Open Caveats

The following caveats have not been resolved for firmware version 12.01T1:

•CSCdz04708—Early 340 series access points are incompatible with VLAN tagging.

Early versions of the 340 series access point are able to set up VLANs, but clients on non-native

VLANs will be unable to transmit and receive large packets. The reason for this is because early 340

series access points were limited to a maximum packet data length of 1500 bytes.

Release Notes for Cisco Aironet 340 and 350 Series Access Points and 350 Series Bridges Running Firmware Version 12.01T1

OL-3740-01

Caveats

You can identify an affected access point by browsing to the Ethernet Identification page and

checking the Maximum Packet Data Length parameter. If it is 1500, the failure will occur.

Possible workaround—If you have an early 340 series access point on your network, you can

eliminate the problem by setting the Maximum Packet Data Length parameter for all other devices

to 1400 bytes.

•CSCin18914—IP release or renew not occurring with EAP-TLS+MIC+KH+BWR.

When a client associates with EAP-TLS + 40/128 bit broadcast key + MIC +Keyhash + Broadcast

WEP key rotation (10sec), and IP DHCP release and renew commands are issued, the client releases

the IP address, never receives it again, and remains EAP authenticated. A ping from the access point

to the client appears to succeed, but does not reveal an IP address. The access point association table

shows the IP address for the client as 0.0.0.0.

•CSCdy29556—Symbol IP phone continuously associates and authenticates to an access point

configured with multiple VLANs.

When a Symbol IP phone is associated to a VoIP VLAN (Symbol extensions enabled), the phone

associates to the access point and is authenticated approximately every 2 seconds. The Symbol

phone shows a “No Network” error every 1 to 2 minutes.

It also appears that Symbol phones do not work well when using a non-primary SSID. It is possible

that the phone does not perform an active probe and therefore does not detect information about the

SSID it associated with in the beacon, causing it to reassociate and re-authenticate.

There is no workaround for this caveat.

•CSCdx81372—Access point does not accept version 11.21-generated .ini file.

If you download the full configuration .ini from an access point running 11.21, upgrade to version

12.01T1, and then attempt to download the .ini file from an FTP server, the following error message

displays:

*** No Such MIB Variable as Specified on Initialization File Line xxx! for the

following variables:

awcAaaServerAccountingEnabled.x,

awcVoIPVlanId, awcVoIPVlanEnabled,

awcPublicVlanId.

*** Bad Value for MIB Variable awcVlanEncapMode Specified on Initialization File Line

xxx (error 13)!

Workaround—When producing .ini files, dump a non-default configuration for version 11.21

instead of a full configuration.

•CSCdw89705—All Ethernet devices behind a client bridge show up as roamed.

When a non-root bridge roams from one root bridge to another, messages might appear in the logs

of the root bridges stating that Ethernet devices connected to the non-root bridge and wireless client

devices associated to the non-root bridge have roamed.

You can ignore these messages.

•CSCdz04380—Incorrect values are advertised for CWMin and CWMax on Voice VLAN.

When a voice VLAN using Cisco IP Phones is configured with default settings (CSMin=31,

CWMax=31), the values advertised by the access point in the beacons and probes are CWMin=7 and

CWMax=255.

There is no workaround for this caveat.

Release Notes for Cisco Aironet 340 and 350 Series Access Points and 350 Series Bridges Running Firmware Version 12.01T1

OL-3740-01

Caveats

•CSCdz50218—Access point does not update home or foreign agent status when advertisement flags

change.

When a local home or foreign agent is disabled on the router, the access point does not detect the

change from the the advertisement flags it receives. The access point continues to list the agent

addresses on the Statistics page.

Workaround: Disable then enable proxy Mobile IP.

•CSCdy10787—The access point aborts any configuration containing an unknown MIB variable.

When an access point receives a configuration from another access point that is running a newer

firmware version than the receiving access point, the receiving access point aborts the configuration

if it encounters a MIB variable that it does not recognize.

Workaround: Upgrade access points to the same firmware version before distributing

configurations.

•CSCdy11906—When WEP is enabled and you set all WEP keys to not set, WEP is still enabled but

the web-browser page indicates that WEP is disabled.

Workaround: To disable WEP, select no encryption from the Use of Data Encryption by Stations is

drop-down menu on the Radio Data Encryption page.

•CSCdz43069—Symbol phone not working when multicast or FTP traffic is passed.

If an FTP or multicast session is in progress during a Symbol phone session, the phone call may be

dropped and the phone may be unable to roam between subnets. If there are no FTP or multicast

sessions in progress, the Symbol phone operates normally and is able to roam between subnets.

Workaround: Limit multicast and FTP traffic if using Symbol phones in a proxy Mobile IP

environment.

•CSCdz48575—Default lost Ethernet action not appropriate.

See the “Unexpected Results on Lost Ethernet” section on page 7 for a complete description of this

caveat.

•CSCdz32333—Repeater bridge link intermittent with LEAP client on non-native VLAN.

An intermittent drop occurs in a bridge link between a root bridge and a non-root bridge acting as a

repeater or non-root device. The drop occurs when a client LEAP authenticates and associates with

the non-root bridge that is acting as a repeater or non-root device. When the client associates to an

SSID that is mapped to the non-native VLAN on the non-root bridge, it subsequently brings down

the bridge link between the root and the non-root that is LEAP authenticated as well. The condition

is intermittent and does not seem to occur if the VLAN is not enabled or if the client is associated

to the root bridge or is using open or WEP authentication to the non-root bridge.

There is no workaround for this caveat.

•CSCdy76093—Proxy Mobile IP with multiple authoritative access points continuously sends

update packets.

See the “Adding or Deleting Proxy Mobile IP AAPs” section on page 7 for details and procedures

to correct this problem.

Release Notes for Cisco Aironet 340 and 350 Series Access Points and 350 Series Bridges Running Firmware Version 12.01T1

OL-3740-01

Troubleshooting

•CSCdy27831—When you set the default Unicast Address Filter to disallowed, you must reboot the

access point for the setting to take effect.

•CSCdy73695—When a repeater access point receives packets from a root access point while the

repeater is attempting to associate, the repeater sometimes displays this error:

00:00:10 (Warning): Station <Root MAC address> Associated with Encryption, then

attempted to send an Unencrypted packet to <Repeater MAC address> (length 74)

The error occurs when WEP is not enabled on either the root or the repeater. When an association

response is received by the repeater, it no longer displays the error message and is able to

successfully pass data. However, if a significant amount of traffic, such as multicast traffic, is being

transmitted by the root access point while the repeater is attempting to associate, the repeater may

miss the association response from the root access point and never fully associate. In this case, the

root access point reports that the repeater is associated and the repeater reports that it is only

authenticated. The repeater continues to display warning messages about receiving unencrypted

packets and does not recover until it is rebooted.

•CSCdx81372—Access point does not accept version 11.56-generated .ini file

If you download the full configuration .ini from an access point running 11.56, upgrade to version

12.01T1, and then attempt to download the .ini file from an FTP server, the following error message

appears:

*** No Such MIB Variable as Specified on Initialization File Line xxx! for the

following variables:

awcAaaServerAccountingEnabled.x,

awcVoIPVlanId, awcVoIPVlanEnabled,

awcPublicVlanId.

*** Bad Value for MIB Variable awcVlanEncapMode Specified on Initialization File Line

xxx (error 13)!

Workaround—When producing .ini files, dump a non-default configuration for version 11.56

instead of a full configuration.

•CSCdz58192—Root bridges with LEAP enabled on the native VLAN must have the security setting

matching that set on the Advanced Radio Setup page. If the settings do not match, the bridge link

will go down temporarily whenever an infrastructure device authenticates.

Resolved Caveat

The following caveat is resolved in version 12.01T1:

•CSCdz66748 (CSCdz60229)—Access points are no longer vulnerable to a denial of service (DoS)

when support for the Secure Shell (SSH) server is enabled. Malformed SSH packets directed at the

access point no longer cause a reload of the device.

Troubleshooting

For the most up-to-date, detailed troubleshooting information, refer to the Cisco TAC website at

http://www.cisco.com/tac. In the Tools and Utilities section, Select Wireless Troubleshooting Center.

The Wireless Troubleshooting Center page appears. Choose the link that best suits your troubleshooting

needs.

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