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Release Notes for Cisco Aironet Access Points, Cisco IOS Release 12.2(15)XR2

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Release Notes for Cisco Aironet 350, 1100, and 1200 Series Access Points for Cisco IOS Release 12.2(15)XR2

Table Of Contents

Release Notes for Cisco Aironet 350, 1100,
and 1200 Series Access Points for Cisco IOS Release 12.2(15)XR2

Contents

Introduction

System Requirements

Finding the IOS Software Version

Upgrading to a New Software Release

Converting to Cisco IOS Software

Some Fields Not Updated During Upgrade to IOS Software

New Features

Installation Notes

Installation in Environmental Air Space

Power Considerations

Use Only One Power Option

Operating 5-GHz Radio Requires Power Injector, Power Module, or Catalyst 3550-24 PWR Switch

Access Point Requires 1200 Series Universal Power Supply and Power Injector

Unpowered 1100 Series Access Points Cause Loopback When Connected to Switches Without Loopback Detection

Antenna Installation

Important Notes

TFTP Required to Upgrade 1200 Series Access Points to this Release

Default Username and Password Are Cisco

New Express Security Page Simplifies Security Setup

Access Points Do Not Support Loopback Interface

Non-Cisco Aironet 802.11g Clients Might Require Firmware Upgrade

Throughput Option for 802.11g Radio Blocks Association by 802.11b Clients

Transmit Power Set to Maximum When You Install 802.11g Radio

Use Auto for Ethernet Duplex and Speed Settings

Use force-reload Option with archive download-sw Command

Radio MAC Address Appears in ACU

Radio MAC Address Appears in Access Point Event Log

Mask Field on IP Filters Page Behaves the Same As in CLI

Repeater Access Points Running IOS Software Cannot Associate to Parent Access Points Running VxWorks

Repeater Access Points Cannot Be Configured as WDS Access Points

Crossover Cable Sometimes Needed When Ethernet Speed and Duplex Set to Fixed on 1100 Series Access Points

Cannot Perform Link Tests on Non-Cisco Aironet Client Devices and on Cisco Aironet 802.11g Client Devices

System Software Upgrade Sometimes Fails Using Microsoft Internet Explorer 5.01 SP2

1100 Series Access Points with Boot Loader Version 12.2(4)JA Boot into Monitor Mode

Corrupt EAP Packet Sometimes Causes Error Message

When Cipher is TKIP Only, Key Management Must Be Enabled

Cisco CKM Supports Spectralink Phones

Non-Cisco Aironet Clients Sometimes Fail 802.1x Authentication

Microsoft Patch Fixes WPA Authentication Delay

Caveats

Open Caveats

Resolved Caveats

Troubleshooting

Related Documentation

Obtaining Documentation and Submitting a Service Request


Release Notes for Cisco Aironet 350, 1100,
and 1200 Series Access Points for Cisco IOS Release 12.2(15)XR2


September 20, 2004

These release notes describe caveats for Cisco IOS Release 12.2(15)XR2. They also provide important information about Cisco Aironet 350, 1100, and 1200 series access points. This release does not contain new features; it is based on Cisco IOS Release 12.2(15)XR1.

Contents

These release notes contain the following sections:

Introduction

System Requirements

New Features

Installation Notes

Important Notes

Caveats

Troubleshooting

Related Documentation

Obtaining Documentation and Submitting a Service Request

Introduction

The Cisco Aironet Access Point is a wireless LAN transceiver that acts as the connection point between wireless and wired networks or as the center point of a standalone wireless network. In large installations, the roaming functionality provided by multiple access points enables wireless users to move freely throughout the facility while maintaining uninterrupted access to the network.

You can configure and monitor 350, 1100, and 1200 series access points using the command-line interface (CLI), the web-browser interface, or Simple Network Management Protocol (SNMP).

This release is based on Cisco IOS Release 12.2(15)XR1.

System Requirements

You can install Cisco IOS Release 12.2(15)XR2 on all 1100 series access points and on model AP1230 access points. You can also install this release on 1200 series access points that have been converted to run Cisco IOS software. You can tell whether an access point runs VxWorks or Cisco IOS software by looking at the GUI: the GUI on an access point running VxWorks has a yellow and red color scheme, and the GUI on an access point running Cisco IOS software has a green, light-green, and black color scheme.


Note Software upgrades might fail when you use the web-browser interface to install Cisco IOS Release 12.2(15)XR2 on 1200 series access points. The image size exceeds the access point's 4-MB restriction for software upgrades. Use TFTP to upgrade your 1200 series access point to this release. For complete instructions on using TFTP to upgrade access point software, see the "Working with Software Images" section on page 20-18 in the Cisco IOS Software Configuration Guide for Cisco Aironet Access Points. Click this link to browse to that document:
http://www.cisco.com/en/US/products/hw/wireless/ps4570/tsd_products_support_configure.html


Your 350 series access point must run one of these VxWorks versions before you can convert to IOS software: 12.03T, 12.02T1, 12.01T1, 11.23T, or 11.21. Your 1200 series access point must run one of these VxWorks versions before you can convert to IOS software: 12.03T, 12.02T1, 12.01T1, 12.00T, 11.56, or 11.54T. If your access point runs version 12.04, you must downgrade to a supported VxWorks version before upgrading to IOS software.

Your 1200 series access point must run one of these VxWorks versions before you can convert to IOS software: 12.03T, 12.02T1, 12.01T1, 12.00T, 11.56, or 11.54T. If your access point runs version 12.04, you must downgrade to a supported VxWorks version before upgrading to IOS software.


Note Cisco Aironet 340 Series Access Points do not support IOS software. Do not attempt to load an IOS image on 340 series access points or on 350 and 1200 series access points that have not been converted.


Finding the IOS Software Version

To find the version of IOS software running on your access point, use a Telnet session to log into the access point and enter the show version EXEC command. This example shows command output from an access point running Cisco IOS Release 12.2(15)JA:

ap>show version
Cisco Internetwork Operating System Software
IOS (tm) C1200 Software (C1200-K9W7-M), Version 12.2(15)JA
Copyright (c) 1986-2004 by Cisco Systems, Inc.
 
   

On access points running Cisco IOS software, you can also find the software version on the System Software Version page in the access point's web-browser interface. If your access point runs VxWorks software, the software version appears at the top left of most pages in the web-browser interface.

Upgrading to a New Software Release

For instructions on installing access point software:

1. Follow this link to the Cisco Aironet Install and Upgrade page:

http://www.cisco.com/en/US/products/hw/wireless/ps430/tsd_products_support_install_and_upgrade.html

2. Click this link to browse to the Cisco IOS Software Center on Cisco.com:

http://www.cisco.com/cisco/software/navigator.html

Log into Cisco.com to use the Cisco IOS Upgrade Planner.

Converting to Cisco IOS Software

If your 350 or 1200 series access point does not run IOS software, you can use the conversion utility or the conversion upgrade image to convert the access point system to IOS software. Use the conversion utility to maintain the current configuration after the conversion, or load the upgrade image to convert to IOS software without saving the current configuration. Your access point must be running one of these VxWorks firmware versions before you can convert to IOS software:

350 series access points must be running VxWorks version 12.03T, 12.02T1, 12.01T1, 11.23T, or 11.21

1200 series access points must be running VxWorks version 12.03T, 12.02T1, 12.01T1, 12.00T, 11.56, or 11.54T


Note The upgrade image and the conversion tool do not support VxWorks version 12.04. Access points running version 12.04 must be downgraded to a supported operating system version before you can use the upgrade image or the conversion tool.



Note The upgrade to Cisco IOS software is permanent; you cannot revert to non-IOS software. Product warranties do not cover unintended upgrades.


For complete instructions on using the conversion utility, refer to the Cisco Aironet Conversion Tool for Cisco IOS Software, 2.0 Administrator Guide for Windows. Click this link to browse to the Administrator Guide:

http://www.cisco.com/en/US/products/hw/wireless/ps4570/tsd_products_support_configure.html

To download the conversion utility or the upgrade image, click this link to browse to the Cisco IOS Software Center on Cisco.com:

http://www.cisco.com/cisco/software/navigator.html

On the Cisco IOS Software Center page, enter your Cisco.com username and password to use the Feature Navigator or the Cisco IOS Upgrade Planner, or click Wireless Software to go to the Wireless LAN Software page. Download the conversion utility or the upgrade image for 350 or 1200 series access points. You can also download instructions for using the utility and the image.

Some Fields Not Updated During Upgrade to IOS Software

When you upgrade an access point to run Cisco IOS software, some fields that are reported in the console messages during the upgrade are blank or are populated with zeros. However, blank or zero fields are normal after a successful upgrade, because 350 and 1200 series access points do not support that information. This example shows fields that might appear blank or populated with zeros:

 
   
32K bytes of flash-simulated non-volatile configuration memory.
Base Ethernet MAC Address: 00:05:9A:38:42:91
Part Number								:	0-0000-00
PCA Assembly Number								:	000-00000-00
PCA Revision Number								:
PCB Serial Number								:
Top Assembly Part Number								:	000-00000-00
Top Assembly Serial Number								:
Top Revision Number								:
Product/Model Number								:	AIR-AP352-IOS-UPGRD
 
   

New Features

This release does not introduce new features. It supports the features introduced in Cisco IOS Release 12.2(15)XR. Click this link to browse to the release notes for Cisco IOS Release 12.2(15)XR:

http://www.cisco.com/en/US/docs/wireless/access_point/ios/release/notes/b15xr.html

Installation Notes

This section contains information you should keep in mind when installing 350, 1100, and 1200 series access points.

Installation in Environmental Air Space

This section provides information on installing 1100 and 1200 series access points in environmental air space, such as above suspended ceilings.

Cisco Aironet 1100 and 1200 Series Access Points provide adequate fire resistance and low smoke-producing characteristics suitable for operation in a building's environmental air space, such as above suspended ceilings, in accordance with Section 300-22(C) of the National Electrical Code (NEC) and Sections 2-128, 12-010(3) and 12-100 of the Canadian Electrical Code, Part 1, C22.1.


Caution The power injector does not provide fire resistance and low smoke-producing characteristics and is not intended for use in extremely high or low temperatures or in environmental air spaces, such as above suspended ceilings.


Note If you plan to mount a 1200 series access point with a 5-GHz radio in an area subject to environmental air space, Cisco recommends that you mount the access point horizontally so that its antennas point down. Doing so ensures that the access point complies with regulatory requirements for environmental air space with the 5-GHz radio installed.


Power Considerations

This section describes issues you should consider before applying power to an access point.


Caution The operational voltage range for 1100 series access points is 24 to 60 VDC, and the nominal voltage is 48 VDC. Voltage higher than 60 VDC can damage the equipment.


Caution The nominal voltage for 1200 series access points is 48 VDC, and the access point is operational up to 60 VDC. Voltage higher than 60 VDC can damage the equipment.


Caution Cisco Aironet power injectors are designed for use with Cisco Aironet access points and 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.


Note The WS-F6K-PWR power over Ethernet (PoE) daughtercard in a Catalyst 6500 series switch cannot supply power to a 1200 series access point. Using a Catalyst 6500 series switch for inline power requires the WS-F6K-FE48-AF, WS-F6K-GE48-AF, or WS-F6K-VPWR-GE PoE daughtercard.


Use Only One Power Option

You cannot provide redundant power to 1100 and 1200 series access points with both DC power to its power port and inline power from a patch panel or powered switch to the access point's Ethernet port. If you apply power to the access point from both sources, the switch or power patch panel might shut down the port to which the access point is connected. Figure 1 shows the power configuration that can shut down the port on the patch panel or powered switch.

Figure 1 Improper Power Configuration Using Two Power Sources

Operating 5-GHz Radio Requires Power Injector, Power Module, or Catalyst 3550-24 PWR Switch

The 1200 series power injector and the 1200 series power module support operation of the 5-GHz radio in the access point. Currently, the Catalyst 3550-24 PWR switch supports power for both the 2.4-GHz radio and the 5-GHz radio. Other switches and power patch panels might not provide enough power for the 5-GHz radio.

Access Point Requires 1200 Series Universal Power Supply and Power Injector

The 350 series universal power supply and power injector are not compatible with the 1200 series access point. If you use a power injector or a power module to provide power to a 1200 series access point, you must use a 1200 series universal power supply. If you need to use a power injector to inject power into the access point's Ethernet port, you must use a 1200 series power injector.

Unpowered 1100 Series Access Points Cause Loopback When Connected to Switches Without Loopback Detection

When you connect an unpowered 1100 series access point to a switch without loopback detection, the access point causes a loopback. To avoid this problem, make sure loopback detection is enabled on the switch to which the access point is connected. If your switch does not have loopback detection, disconnect the access point from the switch when the access point power is off.

Antenna Installation

For instructions on the proper installation and grounding of external antennas for 1200 series access points, 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 install 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.

Important Notes

This section describes important information about the access point.

TFTP Required to Upgrade 1200 Series Access Points to this Release

Software upgrades sometimes fail when you use the web-browser interface to install Cisco IOS Release 12.2(15)XR1 on 1200 series access points. The image size exceeds the access point's 4-MB restriction for software upgrades. To make sure the upgrade completes successfully, use TFTP to upgrade your 1200 series access point to this release. For complete instructions on using TFTP to upgrade access point software, see the "Working with Software Images" section on page 20-18 in the Cisco IOS Software Configuration Guide for Cisco Aironet Access Points. Click this link to browse to the Cisco IOS Software Configuration Guide for Cisco Aironet Access Points:

http://www.cisco.com/en/US/products/hw/wireless/ps4570/tsd_products_support_configure.html

Default Username and Password Are Cisco

When you open the access point interface, you must enter a username and password. The default username for administrator login is Cisco, and the default password is Cisco. Both the username and password are case sensitive.

New Express Security Page Simplifies Security Setup

The new Express Security page in the access point web-browser interface makes it easier to create SSIDs and assign security settings to them. Figure 2 shows the Express Security page.

Limitations of the Express Security page include:

You cannot edit SSIDs. However, you can delete SSIDs and re-create them.

You cannot assign SSIDs to specific radio interfaces. The SSIDs that you create are enabled on all radio interfaces. To assign SSIDs to specific radio interfaces, use the Security SSID Manager page.

You cannot configure multiple authentication servers. To configure multiple authentication servers, use the Security Server Manager page.

You cannot configure multiple WEP keys. To configure multiple WEP keys, use the Security Encryption Manager page.

You cannot assign an SSID to a VLAN that is already configured on the access point. To assign an SSID to an existing VLAN, use the Security SSID Manager page.

You cannot configure combinations of authentication types on the same SSID (such as MAC address authentication and EAP authentication). To configure combinations of authentication types, use the Security SSID Manager page.

For complete instructions on using the Express Security page, see the "Configuring Basic Security Settings" section on page 2-11 in the Cisco IOS Software Configuration Guide for Cisco Aironet Access Points.

Figure 2 Express Security Page

Access Points Do Not Support Loopback Interface

Access points do not support a loopback interface. Cisco recommends that you not configure a loopback interface on the access point.

Non-Cisco Aironet 802.11g Clients Might Require Firmware Upgrade

Some non-Cisco Aironet 802.11g client devices require a firmware upgrade before they can associate to the 802.11g radio in the access point. If your non-Cisco Aironet 802.11g client device does not associate to the access point, download and install the latest client firmware from the manufacturer's website.

Throughput Option for 802.11g Radio Blocks Association by 802.11b Clients

When you configure the 802.11g access point radio for best throughput, the access point sets all data rates to basic (required). This setting blocks association from 802.11b client devices. The best throughput option appears on the web-browser interface Express Setup and Radio Settings pages and in the speed CLI configuration interface command.

Transmit Power Set to Maximum When You Install 802.11g Radio

When you replace the 802.11b radio in a 1200 series access point with an 802.11g radio, the 802.11g radio is set to the maximum transmit power allowed in your regulatory domain regardless of the power setting configured on the 802.11b radio. After you install the 802.11g radio and the access point reboots, configure the 802.11g radio to the preferred transmit power.

Use Auto for Ethernet Duplex and Speed Settings

Cisco recommends that you use auto, the default setting, for both the speed and duplex settings on the access point Ethernet port. When your access point receives inline power from a switch, any change in the speed or duplex settings that resets the Ethernet link reboots the access point. If the switch port to which the access point is connected is not set to auto, you can change the access point port to half or full to correct a duplex mismatch and the Ethernet link is not reset. However, if you change from half or full back to auto, the link is reset and, if your access point receives inline power from a switch, the access point reboots.


Note The speed and duplex settings on the access point Ethernet port must match the Ethernet settings on the port to which the access point is connected. If you change the settings on the port to which the access point is connected, change the settings on the access point Ethernet port to match.


Use force-reload Option with archive download-sw Command

When you upgrade access point or bridge system software by entering the archive download-sw command on the CLI, you must use the force-reload option. If the access point or bridge does not reload the Flash after the upgrade, the pages in the web-browser interface might not reflect the upgrade. This example shows how to upgrade system software successfully using the archive download-sw command:

AP# archive download-sw /force-reload /overwrite tftp://10.0.0.1/image-name
 
   

Radio MAC Address Appears in ACU

When a Cisco Aironet client device associates to an access point running IOS software, the access point MAC address that appears on the Status page in the Aironet Client Utility (ACU) is the MAC address for the access point radio. The MAC address for the access point Ethernet port is printed on the label on the back of the access point.

Radio MAC Address Appears in Access Point Event Log

When a client device roams from an access point (such as access point alpha) to another access point (access point bravo), a message appears in the event log on access point alpha stating that the client roamed to access point bravo. The MAC address that appears in the event message is the MAC address for the radio in access point bravo. The MAC address for the access point Ethernet port is printed on the label on the back of the access point.

Mask Field on IP Filters Page Behaves the Same As in CLI

In Cisco IOS Release 12.2(8)JA and later, the mask that you enter in the Mask field on the IP Filters page in the access point GUI behaves the same way as a mask that you enter in the CLI. If you enter 255.255.255.255 as the mask, the access point accepts any IP address. If you enter 0.0.0.0, the access point looks for an exact match with the IP address that you entered in the IP Address field.

Repeater Access Points Running IOS Software Cannot Associate to Parent Access Points Running VxWorks

Repeater access points running Cisco IOS software cannot associate to parent access points that do not run IOS software (all 340 series access points, and 350 and 1200 series access points that have not been converted to run IOS software).

Repeater Access Points Cannot Be Configured as WDS Access Points

Repeater access points do not support WDS. You cannot configure a repeater access point as a WDS access point, and if a root access point becomes a repeater in fallback mode, it cannot provide WDS.

Crossover Cable Sometimes Needed When Ethernet Speed and Duplex Set to Fixed on 1100 Series Access Points

If you change the speed and duplex settings from auto to fixed on an 1100 series access point's Ethernet port, the auto-MDIX feature on the port is disabled. When auto-MDIX is disabled, you must determine whether to use a straight-through or a crossover cable to connect the access point Ethernet port to another device. If the Ethernet link goes down after you set the speed and duplex to fixed, try changing the Ethernet cable from crossover to straight-through or from straight-through to crossover.

Cannot Perform Link Tests on Non-Cisco Aironet Client Devices and on Cisco Aironet 802.11g Client Devices

The link test feature on the web-browser interface does not support non-Cisco Aironet client devices nor Cisco Aironet 802.11g client devices.

System Software Upgrade Sometimes Fails Using Microsoft Internet Explorer 5.01 SP2

A system software upgrade sometimes fails when you use Microsoft Internet Explorer version 5.01 SP2 to upgrade system software using the HTTP Upgrade page in the web-browser interface. Use a later version of Microsoft Internet Explorer to perform HTTP system software upgrades, or use TFTP to upgrade system software. Click this URL to browse to the Cisco IOS Software Configuration Guide for Cisco Aironet Access Points for complete instructions on performing software upgrades:

http://www.cisco.com/en/US/products/hw/wireless/ps4570/tsd_products_support_configure.html

1100 Series Access Points with Boot Loader Version 12.2(4)JA Boot into Monitor Mode

When the Ethernet port is disabled on an 1100 series access point running boot loader version 12.2(4)JA, the access point boots into monitor mode when it reboots. To avoid this problem, connect the access point Ethernet port to one of the following:

a wired LAN

the Ethernet port on a PC

Remove power from the access point and reapply power to reboot the unit. When the access point senses an Ethernet connection, it boots normally.

Corrupt EAP Packet Sometimes Causes Error Message

During client authentication, the access point sometimes receives a corrupt EAP packet and displays this error message:

Oct  1 09:00:51.642 R: %SYS-2-GETBUF: Bad getbuffer, bytes= 28165 
-Process= "Dot11 Dot1x process", ipl= 0, pid= 32 
-Traceback= A2F98 3C441C 3C7184 3C604C 3C5E14 3C5430 124DDC
 
   

You can ignore these messages.

When Cipher is TKIP Only, Key Management Must Be Enabled

When you configure TKIP-only cipher encryption (not TKIP + WEP 128 or TKIP + WEP 40) on any radio interface or VLAN, every SSID on that radio or VLAN must be set to use WPA or CCKM key management. If you configure TKIP on a radio or VLAN but you do not configure key management on the SSIDs, client authentication fails on the SSIDs.

Cisco CKM Supports Spectralink Phones

Cisco CKM (CCKM) key management is designed to support voice clients that require minimal roaming times. To date, CCKM supports only Spectralink Wireless Phones. Other voice clients have not been tested with CCKM and are not supported.

Non-Cisco Aironet Clients Sometimes Fail 802.1x Authentication

Some non-Cisco Aironet client adapters do not perform 802.1x authentication to the access point unless you configure Open authentication with EAP. To allow both Cisco Aironet clients using LEAP and non-Cisco Aironet clients using LEAP to associate using the same SSID, you might need to configure the SSID for both Network EAP authentication and Open authentication with EAP.

Microsoft Patch Fixes WPA Authentication Delay

When the access point is configured for optional or mandatory WPA authentication, client adapters in Windows XP platforms sometimes experience a delay when initially authenticating to the access point immediately after it starts up. A patch from Microsoft resolves this issue. The patch is described in Microsoft Knowledge Base Article 826942.

Caveats

This section lists Open Caveats and Resolved Caveats for Cisco IOS Release 12.2(15)XR2.

Open Caveats

These caveats are open in Cisco IOS Release 12.2(15)XR2:

CSCeb50727—Unpowered 1100 series access points sometimes cause a loopback when connected to switches without loopback detection. When you connect an unpowered 1100 series access point to some switches without loopback detection, the access point sometimes causes a loopback. To avoid this problem, make sure loopback detection is enabled on the switch to which the access point is connected. If your switch does not have loopback detection, disconnect the access point from the switch when the access point power is off.

CSCeb52431—When logging into a TACACS+ server, 1100 series access points sometimes send hundreds of additional authentication requests to the server after a successful authentication.

CSCed27052—When VLANs are configured on the access point, the access point sometimes fails to update the WPA group key when a WPA client disassociates from the access point.

CSCed42897—The access point sends a get tlv command when the MAC is enabled. However, the access point should send the get tlv command only when the MAC is disabled.

CSCed63953—The access point information element transmits the default QoS CWMin value for best effort regardless of the value that you enter for that setting.

CSCee68866—The access point sometimes reboots when you enter the no radius-server local command on the CLI.

CSCef70323—A dual-radio 1200 series access point in standby mode sometimes enters a continuous loop when it receives an IP address from a DHCP server. In the loop, the access point repeatedly requests an IP address, disables and enables the radio interfaces, and reassociates to the monitored access point.

Workaround: Assign a static IP address to 1200 series access points in standby mode.

CSCef73394—Client devices sometimes fail CCKM roaming when they use an SSID containing more than 18 characters.

Workaround: When an SSID is configured for CCKM, limit its length to 17 characters.

CSCin64130—RADIUS authentication debug messages sometimes do not contain the WISPr location name configured on the access point.

Resolved Caveats

These caveats are resolved in Cisco IOS Release 12.2(15)XR2:

CSCed75292—The access point radio no longer reboots when a client device attempts to authenticate at the same time that you enter this command on the access point CLI:

show aaa user all
 
   

CSCed78149—A document that describes how the Internet Control Message Protocol (ICMP) could be used to perform a number of Denial of Service (DoS) attacks against the Transmission Control Protocol (TCP) has been made publicly available. This document has been published through the Internet Engineering Task Force (IETF) Internet Draft process, and is entitled "ICMP Attacks Against TCP" (draft-gont-tcpm-icmp-attacks-03.txt).

These attacks, which only affect sessions terminating or originating on a device itself, can be of three types:

1. Attacks that use ICMP "hard" error messages
2. Attacks that use ICMP "fragmentation needed and Don't Fragment (DF) bit set" messages, also known as Path Maximum Transmission Unit Discovery (PMTUD) attacks
3. Attacks that use ICMP "source quench" messages

Successful attacks may cause connection resets or reduction of throughput in existing connections, depending on the attack type.

Multiple Cisco products are affected by the attacks described in this Internet draft.

Cisco has made free software available to address these vulnerabilities. In some cases there are workarounds available to mitigate the effects of the vulnerability.

This advisory is posted at http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20050412-icmp.

The disclosure of these vulnerabilities is being coordinated by the National Infrastructure Security Coordination Centre (NISCC), based in the United Kingdom. NISCC is working with multiple vendors whose products are potentially affected. Its posting can be found at: http://www.niscc.gov.uk/niscc/docs/re-20050412-00303.pdf?lang=en.

CSCee39809—Access points configured for LEAP no longer randomly reboot.

CSCee49659, CSCef24770, CSCef50960, CSCef52120—Uninitialized fields in the message structure sent to the AAA authenticator no longer cause the access point to reboot.

CSCef06846—The access point no longer has a memory leak.

CSCef46191—A specifically crafted TCP connection to a telnet or reverse telnet port of an access point running Cisco IOS software no longer blocks further telnet, reverse telnet, Remote Shell (RSH), Secure Shell (SSH), and HTTP access to the access point.

CSCef66214—Uninitialized message structures no longer cause the access point to reboot.

Troubleshooting

For the most up-to-date, detailed troubleshooting information, refer to the Cisco TAC website at http://www.cisco.com/cisco/web/support/index.html. Click Technology Support, choose Wireless from the menu on the left, and click Wireless LAN.

Related Documentation

This section lists documents related to Cisco IOS Release 12.2(15)XR and to 1100 and 1200 series access points.

Cisco Aironet Conversion Tool for Cisco IOS Software, 2.0 Administrator Guide for Windows

Quick Start Guide: Cisco Aironet 1100 Series Access Points

Quick Start Guide: Cisco Aironet 1200 Series Access Points

Cisco IOS Software Configuration Guide for Cisco Aironet Access Points

Cisco IOS Command Reference for Cisco Aironet Access Points and Bridges

Installation Instructions for Cisco Aironet Power Injectors

Obtaining Documentation and Submitting a Service Request

For information on obtaining documentation, submitting a service request, and gathering additional information, see the monthly What's New in Cisco Product Documentation, which also lists all new and revised Cisco technical documentation:

http://www.cisco.com/en/US/docs/general/whatsnew/whatsnew.html

Subscribe to the What's New in Cisco Product Documentation as an RSS feed and set content to be delivered directly to your desktop using a reader application. The RSS feeds are a free service. Cisco currently supports RSS Version 2.0.