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Cisco 4400 Series Wireless LAN Controllers

Release Notes for Cisco Wireless LAN Controllers and Lightweight Access Points for Release 4.2.130.0

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Release Notes for Cisco Wireless LAN Controllers and Lightweight Access Points for Release 4.2.130.0

Table Of Contents

Release Notes for Cisco Wireless LAN Controllers and Lightweight Access Points for Release 4.2.130.0

Contents

Cisco Unified Wireless Network Solution Components

Special Notice for Mesh Networks

Controller Requirements

Software Release Information

Finding the Software Release

Upgrading to a New Software Release

Special Rules for Upgrading to Controller Software Release 4.2.130.0

Installation Notes

Warnings

Safety Information

FCC Safety Compliance Statement

Safety Precautions

Installation Instructions

Important Notes

Internal DHCP Server

Crash Files for 1250 Series Access Points

Configuration File Stored in XML Format

Web Authentication Redirects

Disabling Radio Bands

40-MHz Channels in the 2.4-GHz Band

Impact of External Antenna Gain on Transmit Power

Supporting Oversized Access Point Images

Cisco 1250 Series Access Points and Cisco 7920 IP Phones

Multicast Limitations

MAC Filtering for WGB Wired Clients

CKIP Not Supported with Dynamic WEP

Synchronizing the Controller and Location Appliance

UNII-2 Channels Disabled on New 1000 Series Access Points for United States, Canada, and Philippines

FCC DFS Support on 1130 Series Access Points

Inaccurate Transmit Power Display

Setting the Retransmit Timeout Value for TACACS+ Servers

Configuring an Access Point's Prestandard Power Setting

1000 Series Access Points and Radar Detection

Controller Functions that Require a Reboot

Multicast Queue Depth

2106 Controller LEDs

Resetting the Configuration on 2006 Controllers

Rate-Limiting on the Controller

Pings Supported to the Management Interface of the Controller

Pinging from a Network Device to a Controller Dynamic Interface

GLBP Not Supported

IPSec Not Supported

4400 Series Controllers Do Not Forward Subnet Broadcasts through Guest Tunnel

Connecting 1100 and 1300 Series Access Points

Preventing Clients from Accessing the Management Network on a Controller

Voice Wireless LAN Configuration

Changing the IOS LWAPP Access Point Password

Exclusion List (Blacklist) Client Feature

RADIUS Servers and the Management VLAN

Cisco 1000 Series Access Points and WMM

Cisco Aironet 1030 Remote Edge Lightweight Access Points and WPA2-PSK

Lightweight Access Point Connection Limitations

RADIUS Servers

Management Usernames and Local Netuser Names

802.1X and Microsoft Wireless Configuration Manager

Using the Backup Image

Home Page Retains Web Authentication Login with IE 5.x

Rogue Location Discovery Protocol (RLDP)

Ad-Hoc Rogue Containment

Changing the Default Values of SNMP Community Strings

Changing the Default Values for SNMP v3 Users

Features Not Supported on 2000 and 2100 Series Controllers

Some Clients See Only 64 Access Point MAC Addresses (BSSIDs) at a Time

2006 Image Not Supported for 3504 Controllers

Running a 3504 Image on a 2000 Series Controller

Upgrading External Web Authentication

Caveats

Open Caveats

Resolved Caveats

If You Need More Information

Troubleshooting

Documentation Updates

Omissions

Related Documentation

Obtaining Documentation, Support, and Security Guidelines


Release Notes for Cisco Wireless LAN Controllers and Lightweight Access Points for Release 4.2.130.0


May 27, 2008

These release notes describe open and resolved caveats for software release 4.2.130.0 for Cisco 2000, 2100, and 4400 Series Wireless LAN Controllers; Cisco Wireless Services Modules (WiSM); Cisco Wireless LAN Controller Network Modules; Catalyst 3750G Integrated Wireless LAN Controller Switches; Cisco 3201 Wireless Mobile Interface Cards (WMICs); and Cisco Aironet 1000, 1100, 1130, 1200, 1230AG, 1240, 1250, and 1300 Series Lightweight Access Points, which comprise part of the Cisco Unified Wireless Network (UWN) Solution.


Note Unless otherwise noted, all of the Cisco wireless LAN controllers are hereafter referred to as controllers, and all of the Cisco lightweight access points are hereafter referred to as access points.


Contents

These release notes contain the following sections.

Cisco Unified Wireless Network Solution Components

Controller Requirements

Software Release Information

Installation Notes

Important Notes

Caveats

Troubleshooting

Documentation Updates

Related Documentation

Obtaining Documentation, Support, and Security Guidelines

Cisco Unified Wireless Network Solution Components

The following components are part of the Cisco UWN Solution and are compatible in this release:

Software release 4.2.130.0 for all Cisco controllers and lightweight access points

Cisco autonomous to lightweight mode upgrade tool release 3.0

Cisco Wireless Control System (WCS) software release 4.2.97.0


Note Cisco WCS 5.0.56.0 and 5.0.56.2 do not support controllers running software release 4.2.99.0, 4.2.112.0, or 4.2.130.0.


Cisco WCS Navigator 1.1.97.0

Location appliance software release 3.1.38.0

Cisco 2700 Series Location Appliances

Cisco 2000 Series Wireless LAN Controllers

Cisco 2100 Series Wireless LAN Controllers

Cisco 4400 Series Wireless LAN Controllers

Cisco Wireless Services Module (WiSM) for Cisco Catalyst 6500 Series Switches and Cisco 7600 Series Routers

Cisco Wireless LAN Controller Network Module for Cisco Integrated Services Routers

Catalyst 3750G Wireless LAN Controller Switches

Cisco 3201 Wireless Mobile Interface Card (WMIC)

Cisco Aironet 1000, 1100, 1130, 1200, 1230AG, 1240, 1250, and 1300 Series Lightweight Access Points


Note Only Cisco Aironet 1200 Series Access Points that contain 802.11g (AIR-MP21G) or second-generation 802.11a radios (AIR-RM21A or AIR-RM22A) are supported for use with controller software releases. The AIR-RM20A radio, which was included in early 1200 series access point models, is not supported. To see the type of radio module installed in your access point, enter this command on the access point: show controller dot11radio n, where n is the number of the radio (0 or 1).



Note The 1250 series access points have a hardware limitation where beacons can only be output at intervals that are multiples of 17 milliseconds. When these APs are configured for a 100-millisecond beacon interval, they transmit beacons every 102 milliseconds. Similarly, when the beacon interval is configured for 20 milliseconds, these APs transmit beacons every 17 milliseconds.


Special Notice for Mesh Networks


Note Do not upgrade to controller software release 4.2.130.0 if you have mesh access points in your network. If your network uses mesh access points, use only mesh-specific releases such as 4.1.191.24M.



Note Cisco WCS software release 4.2.81.0 may be used to manage both mesh and non-mesh controllers (for example, controllers running software release 4.2.130.0 and 4.1.191.24M). You do not need different instances of WCS to manage mesh and non-mesh controllers.


Controller Requirements

The controller GUI requires the following operating system and web browser:

Windows XP SP1 or higher or Windows 2000 SP4 or higher

Internet Explorer 6.0 SP1 or higher


Note Internet Explorer 6.0 SP1 or higher is the only browser supported for accessing the controller GUI and for using web authentication.


Software Release Information

Software is factory installed on your controller and automatically downloaded to the access points after a release upgrade and whenever an access point joins a controller. As new releases become available for the controllers and their access points, consider upgrading.


Note The Cisco WiSM requires software release SWISMK9-32 or later. The Supervisor 720 12.2(18)SXF2 supports the Cisco WiSM software release 3.2.78.4 or later, and the Supervisor 720 12.2(18)SXF5 (Cisco IOS Software Modularity) supports the Cisco WiSM software release 4.0.155.5 (with Cisco IOS Software Modularity).



Note To use the Cisco WiSM in the Cisco 7609 and 7613 Series Routers, the routers must be running Cisco IOS Release 12.2(18)SXF5 or later.



Note The Cisco Wireless LAN Controller Network Module is supported on Cisco 28/37/38xx Series Integrated Services Routers running Cisco IOS Release 12.4(11)T2, 12.4(11)T3, and 12.5.



Note To use the controller in the Catalyst 3750G Wireless LAN Controller Switch, the switch must be running Cisco IOS Release 12.2(25)FZ, 12.2(35)SE or later, 12.2(37)SE or later, 12.2(44)SE or later, or 12.2(46)SE or later. The following Cisco IOS Releases and any variants are not supported: 12.2(25)SEC, 12.2(25)SED, 12.2(25)SEE, 12.2(25)SEF, and 12.2(25)SEG. All Catalyst 3750 software feature sets (IP Base, IP Service, and Advanced IP Services) are supported for use with the controller.


Finding the Software Release

To find the software release running on your controller, click Monitor and look at the Software Version field under Controller Summary on the controller GUI or enter show sysinfo on the controller CLI.

Upgrading to a New Software Release

When you upgrade the controller's software, the software on the controller's associated access points is also automatically upgraded. When an access point is loading software, each of its LEDs blinks in succession. Up to 10 access points can be concurrently upgraded from the controller.


Note When you downgrade from 4.2.130.0 to 4.2.61.0 or an earlier release, the LWAPP mode may or may not change from Layer 3 to Layer 2, depending on whether the configuration was saved in the earlier image. If the LWAPP mode changes, access points may not join the controller, and you must manually reset the controller to Layer 3 to resolve this issue.



Caution Do not power down the controller or any access point during this process; otherwise, you might corrupt the software image. Upgrading a controller with a large number of access points can take as long as 30 minutes, depending on the size of your network. However, with the increased number of concurrent access point upgrades supported in software release 4.0.206.0 and later, the upgrade time should be significantly reduced. The access points must remain powered, and the controller must not be reset during this time.

Special Rules for Upgrading to Controller Software Release 4.2.130.0


Caution Before upgrading your controller to software release 4.2.130.0, you must comply with the following rules.

Make sure you have a TFTP server available for the software upgrade. Keep these guidelines in mind when setting up a TFTP server:

Controller software release 4.2.130.0 is greater than 32 MB; therefore, you must make sure that your TFTP server supports files that are larger than 32 MB. Some TFTP servers that support files of this size are tftpd and the TFTP server within the WCS. If you attempt to download the 4.2.130.0 controller software and your TFTP server does not support files of this size, the following error message appears: "TFTP failure while storing in flash."

If you are upgrading through the service port, the TFTP server must be on the same subnet as the service port because the service port is not routable, or you must create static routes on the controller.

If you are upgrading through the distribution system network port, the TFTP server can be on the same or a different subnet because the distribution system port is routable.

A third-party TFTP server cannot run on the same computer as the WCS because the WCS built-in TFTP server and the third-party TFTP server require the same communication port.

If your controller is running software release 4.0.206.0 (or a later 4.0 release), 4.1.171.0 (or a later 4.1 release), 4.2.61.0, 4.2.99.0, or 4.2.112.0, you can upgrade your controller directly to software release 4.2.130.0. If your controller is running a 3.2 release or a 4.0 release prior to 4.0.206.0, you must upgrade your controller to an intermediate release prior to upgrading to 4.2.130.0. Table 1 shows the upgrade path that you must follow before downloading software release 4.2.130.0.

Table 1 Upgrade Path to Controller Software Release 4.2.130.0

Current Software Release
Upgrade Path to 4.2.130.0 Software

3.2.78.0 or later 3.2 release

Upgrade to 4.0.206.0 (or a later 4.0 release) before upgrading to 4.2.130.0.

4.0.155.5

Upgrade to 4.0.206.0 (or a later 4.0 release) before upgrading to 4.2.130.0.

4.0.179.11

4.0.206.0 or later 4.0 release

You can upgrade directly to 4.2.130.0.

4.1.171.0 or later 4.1 release

You can upgrade directly to 4.2.130.0.

4.2.61.0

You can upgrade directly to 4.2.130.0.

4.2.99.0

You can upgrade directly to 4.2.130.0.

4.2.112.0

You can upgrade directly to 4.2.130.0.



Note When you upgrade the controller to an intermediate software release, wait until all of the access points joined to the controller are upgraded to the intermediate release before you install the 4.2.130.0 software. In large networks, it can take some time to download the software on each access point.


Cisco requires you to install the Cisco Unified Wireless Network Controller Boot Software 4.2.112.0 ER.aes file on the following controllers: 4400 series, Cisco WiSM, and Catalyst 3750G Wireless LAN Controller Switch. It is optional on other controller platforms. This file resolves CSCso00774 and is necessary to ensure proper operation of the controller. If you do not install the ER.aes file, your controller does not obtain the fix for this defect, and "Error" appears in the Bootloader Version field in the output of the show sysinfo command.


Note When you install the ER.aes file, a new bootloader file is also loaded. This is true for all controllers except the 2106 controller, for which the bootloader is not upgradable.



Note The ER .aes files are independent from the controller software files. You can run any controller software file with any ER.aes file. However, installing the latest boot software file (4.2.112.0 ER.aes) ensures that the boot software modifications in all of the previous and current boot software ER.aes files are installed.



Caution If you require a downgrade from one release to another, you may lose the configuration from your current release. The workaround is to reload the previous controller configuration files saved on the backup server or to reconfigure the controller.

Follow these steps to upgrade the controller software using the controller GUI.


Step 1 Upload your controller configuration files to a server to back them up.


Note Cisco highly recommends that you back up your controller's configuration files prior to upgrading the controller software. Otherwise, you must manually reconfigure the controller.


Step 2 Follow these steps to obtain the 4.2.130.0 controller software and the Cisco Unified Wireless Network Controller Boot Software 4.2.112.0 ER.aes file from the Software Center on Cisco.com:

a. Click this URL to go to the Software Center:

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

b. Click Wireless Software.

c. Click Wireless LAN Controllers.

d. Click Standalone Controllers or Integrated Controllers and Controller Modules.

e. Click a controller series.

f. If necessary, click a controller model.

g. If you chose Standalone Controllers in Step d., click Wireless LAN Controller Software.

h. If you chose Cisco Catalyst 6500 Series/7600 Series Wireless Services Module (WiSM) in Step e., click Wireless Services Modules (WiSM) Software.

i. Click a controller software release. The software releases are labeled as follows to help you determine which release to download:

Early Deployment (ED)—These software releases provide new features and new hardware platform support as well as bug fixes.

Maintenance Deployment (MD)—These software releases provide bug fixes and ongoing software maintenance.

Deferred (DF)—These software releases have been deferred. Cisco recommends that you migrate to an upgraded release.

j. Click a software release number.

k. Click the filename (filename.aes).

l. Click Download.

m. Read Cisco's End User Software License Agreement and then click Agree.

n. Save the file to your hard drive.

o. Repeat Steps a. to n. to download the remaining file (either the 4.2.130.0 controller software or the Cisco Unified Wireless Network Controller Boot Software 4.2.112.0 ER.aes file).

Step 3 Copy the controller software file (filename.aes) and the Cisco Unified Wireless Network Controller Boot Software 4.2.112.0 ER.aes file to the default directory on your TFTP server.

Step 4 Click Commands > Download File to open the Download File to Controller page.

Step 5 From the File Type drop-down box, choose Code.

Step 6 In the IP Address field, enter the IP address of the TFTP server.

Step 7 The default values of 10 retries and 6 seconds for the Maximum Retries and Timeout fields should work fine without any adjustment. However, you can change these values if desired. To do so, enter the maximum number of times that the TFTP server attempts to download the software in the Maximum Retries field and the amount of time (in seconds) that the TFTP server attempts to download the software in the Timeout field.

Step 8 In the File Path field, enter the directory path of the software.

Step 9 In the File Name field, enter the name of the software file (filename.aes).

Step 10 Click Download to download the software to the controller. A message appears indicating the status of the download.

Step 11 Repeat Step 4 to Step 10 to install the remaining file (either the 4.2.130.0 controller software or the Cisco Unified Wireless Network Controller Boot Software 4.2.112.0 ER.aes file).

Step 12 After the download is complete, click Reboot.

Step 13 If prompted to save your changes, click Save and Reboot.

Step 14 Click OK to confirm your decision to reboot the controller.

Step 15 If desired, reload your latest configuration file to the controller.

Step 16 To verify that the 4.2.130.0 controller software is installed on your controller, click Monitor on the controller GUI and look at the Software Version field under Controller Summary.

Step 17 To verify that the Cisco Unified Wireless Network Controller Boot Software 4.2.112.0 ER.aes file is installed on your controller, enter the show sysinfo command on the controller CLI and look at the Bootloader Version field. "N/A" appears if the ER.aes file is installed successfully. "Error" appears if the ER.aes file is not installed.


Note You can use this command to verify the boot software version on all controllers except the 2106 because the bootloader is not upgradable on the 2106 controller.



Installation Notes

This section contains important information to keep in mind when installing controllers and access points.

Warnings


Warning This warning means danger. You are in a situation that could cause bodily injury. Before you work on any equipment, be aware of the hazards involved with electrical circuitry and be familiar with standard practices for preventing accidents.

Warning Only trained and qualified personnel should be allowed to install, replace, or service this equipment.

Warning Do not locate any antenna near overhead power lines or other electric light or power circuits, or where it can come into contact with such circuits. When installing antennas, take extreme care not to come in contact with such circuits, as they may cause serious injury or death. For proper installation and grounding of the antenna, refer to national and local codes (e.g. U.S.: NFPA70, National Electrical Code, Article 810, in Canada: Canadian Electrical Code, Section 54).

Warning This product relies on the building's installation for short-circuit (overcurrent) protection. Ensure that the protective device is rated not greater than: 120 VAC, 15A U.S. (240vac, 10A International)

Warning This equipment must be grounded. Never defeat the ground conductor or operate the equipment in the absence of a suitably installed ground connector. Contact the appropriate electrical inspection authority or an electrician if you are uncertain that suitable grounding is available.

Warning Read the installation instructions before you connect the system to its power source.

Warning Do not work on the system or connect or disconnect cables during periods of lightning activity.

Warning Do not operate your wireless network near unshielded blasting caps or in an explosive environment unless the device has been modified to be especially qualified for such use.

Warning In order to comply with radio frequency (RF) exposure limits, the antennas for this product should be positioned no less than 6.56 ft. (2 m) from your body or nearby persons.

Warning This unit is intended for installation in restricted areas. A restricted access area can be accessed only through the use of a special tool, lock and key, or other means of security.

Safety Information

Follow the guidelines in this section to ensure proper operation and safe use of the controllers and access points.

FCC Safety Compliance Statement

FCC Compliance with its action in ET Docket 96-8, has adopted a safety standard for human exposure to RF electromagnetic energy emitted by FCC-certified equipment. When used with approved Cisco Aironet antennas, Cisco Aironet products meet the uncontrolled environmental limits found in OET-65 and ANSI C95.1, 1991. Proper operation of this radio device according to the instructions in this publication results in user exposure substantially below the FCC recommended limits.

Safety Precautions

Each year hundreds of people are killed or injured when attempting to install an antenna. In many of these cases, the victim was aware of the danger of electrocution but did not take adequate steps to avoid the hazard.

For your safety, and to help you achieve a good installation, read and follow these safety precautions. They may save your life!

1. If you are installing an antenna for the first time, for your own safety as well as others, seek professional assistance. Your Cisco sales representative can explain which mounting method to use for the size and type of antenna you are about to install.

2. Select your installation site with safety as well as performance in mind. Electric power lines and phone lines look alike. For your safety, assume that any overhead line can kill you.

3. Call your electric power company. Tell them your plans and ask them to come look at your proposed installation. This is a small inconvenience considering your life is at stake.

4. Plan your installation carefully and completely before you begin. Successfully raising a mast or tower is largely a matter of coordination. Each person should be assigned to a specific task and should know what to do and when to do it. One person should be in charge of the operation to issue instructions and watch for signs of trouble.

5. When installing an antenna, remember:

a. Do not use a metal ladder.

b. Do not work on a wet or windy day.

c. Do dress properly—shoes with rubber soles and heels, rubber gloves, long-sleeved shirt or jacket.

6. If the assembly starts to drop, get away from it and let it fall. Remember that the antenna, mast, cable, and metal guy wires are all excellent conductors of electrical current. Even the slightest touch of any of these parts to a power line completes an electrical path through the antenna and the installer: you!

7. If any part of an antenna system should come in contact with a power line, do not touch it or try to remove it yourself. Call your local power company. They will remove it safely.

8. If an accident should occur with the power lines, call for qualified emergency help immediately.

Installation Instructions

Refer to the appropriate quick start guide or hardware installation guide for instructions on installing controllers and access points.


Note To meet regulatory restrictions, all external antenna configurations must be professionally installed.


Personnel installing the controllers and access points must understand wireless techniques and grounding methods. Access points with internal antennas can be installed by an experienced IT professional.

The controller must be installed by a network administrator or qualified IT professional, and the proper country code must be selected. Following installation, access to the controller should be password protected by the installer to maintain compliance with regulatory requirements and ensure proper unit functionality.

Important Notes

This section describes important information about the controllers and access points.

Internal DHCP Server

When clients use the controller's internal DHCP server, IP addresses are not preserved across reboots. As a result, multiple clients can be assigned the same IP address. To resolve any IP address conflicts, clients must release their existing IP address and request a new one.

Crash Files for 1250 Series Access Points

The 1250 series access points may contain either an old bootloader or a new bootloader. Those with an old bootloader do not generate a crash log when a crash occurs. The crash log is disabled so that a crash does not corrupt the flash file system. Those with a new bootloader generate a crash log if the access point is running controller software release 4.2.112.0 or later.

New 1250 series access points shipped from the factory contain the new bootloader image, which fixes the flash file system after it is corrupted during a crash (without losing files). This new bootloader automatically sets a new CRASH_LOG environment variable to "yes," which enables a crash log to be generated following a crash but only on controllers running software release 4.2.112.0 or later. Therefore, no user configuration is needed to enable a crash log on new 1250 series access points shipped from the factory.

Configuration File Stored in XML Format

In controller software 4.2, the controller's bootup configuration file is stored in an Extensible Markup Language (XML) format rather than in binary format. Therefore, you cannot download a binary configuration file onto a controller running software release 4.2. However, when you upgrade a controller from a previous software release to 4.2, the configuration file is migrated and converted to XML.

Web Authentication Redirects

The controller supports web authentication redirects only to HTTP (HTTP over TCP) servers. It does not support web authentication redirects to HTTPS (HTTP over SSL) servers.

Disabling Radio Bands

The controller disables the radio bands that are not permitted by the configured country of operation (CSCsi48220).

40-MHz Channels in the 2.4-GHz Band

Cisco recommends that you do not configure 40-MHz channels in the 2.4-GHz radio band because severe co-channel interference is likely to occur.

Impact of External Antenna Gain on Transmit Power

In controller software release 4.2 or later, external antenna gain is factored into the maximum transmit power of the access point. Therefore, when you upgrade from an earlier software release to 4.2 or later, you might see a decrease in transmit power output.

Supporting Oversized Access Point Images

Controller software release 4.2 or later allows you to upgrade to an oversized access point image by deleting the recovery image to create sufficient space. This feature affects only access points with 8 MB of flash (the 1100, 1200, and 1310 series access points). All newer access points have a larger flash size than 8 MB.


Note As of August 2007, there are no oversized access point images, but as new features are added, the access point image size will continue to grow.


The recovery image provides a backup image that can be used if an access point power-cycles during an image upgrade. The best way to avoid the need for access point recovery is to prevent an access point from power-cycling during a system upgrade. If a power-cycle occurs during an upgrade to an oversized access point image, you can recover the access point using the TFTP recovery procedure.

Follow these steps to perform the TFTP recovery procedure.


Step 1 Download the required recovery image from Cisco.com (c1100-rcvk9w8-mx, c1200-rcvk9w8-mx, or c1310-rcvk9w8-mx) and install it in the root directory of your TFTP server.

Step 2 Connect the TFTP server to the same subnet as the target access point and power-cycle the access point. The access point boots from the TFTP image and then joins the controller to download the oversized access point image and complete the upgrade procedure.

Step 3 After the access point has been recovered, you may remove the TFTP server.


Cisco 1250 Series Access Points and Cisco 7920 IP Phones

Cisco 1250 series access points are not supported for use with the Cisco 7920 IP phone. They can, however, be used with the Cisco 7921 and 7925 IP phones.

Multicast Limitations

Multicast is not supported on access points that are connected directly to the local port of a 2000 or 2100 series controller.

MAC Filtering for WGB Wired Clients

Controller software release 4.1.178.0 or later enables you to configure a MAC-filtering IP address for a workgroup bridge (WGB) wired client to allow passive WGB wired clients, such as terminal servers or printers with static IP addresses, to be added and remain in the controller's client table while the WGB is associated to a controller in the mobility group. This feature, activated by the config macfilter ipaddress MAC_address IP_address CLI command, can be used with any passive device that does not initiate any traffic but waits for another device to start communication.

This feature allows the controller to learn the IP address of a passive WGB wired client when the WGB sends an IAPP message to the controller that contains only the WGB wired client's MAC address. Upon receiving this message from the WGB, the controller checks the local MAC filter list (or the anchor controller's MAC filter list if the WGB has roamed) for the client's MAC address. If an entry is found and it contains an IP address for the client, the controller adds the client to the controller's client table.


Note Unlike the existing MAC filtering feature for wireless clients, you are not required to enable MAC filtering on the WLAN for WGB wired clients.



Note WGB wired clients using MAC filtering do not need to obtain an IP address through DHCP to be added to the controller's client table.


CKIP Not Supported with Dynamic WEP

In controller software release 4.1.185.0 or later, CKIP is supported for use only with static WEP. It is not supported for use with dynamic WEP. Therefore, a wireless client that is configured to use CKIP with dynamic WEP is unable to associate to a wireless LAN that is configured for CKIP. Cisco recommends that you use either dynamic WEP without CKIP (which is less secure) or WPA/WPA2 with TKIP or AES (which are more secure).

Synchronizing the Controller and Location Appliance

For controller software release 4.2 or later, if a location appliance (release 3.1 or later) is installed on your network, the time zone must be set on the controller to ensure proper synchronization between the two systems. Also, Cisco highly recommends that the time be set for networks that do not have location appliances. Refer to Chapter 4 of the Cisco Wireless LAN Controller Configuration Guide, Release 4.2 for instructions for setting the time and date on the controller.


Note The time zone can be different for the controller and the location appliance, but the time zone delta must be configured accordingly, based on Greenwich Mean Time (GMT).



Note Daylight Savings Time (DST) is not supported in controller software release 4.2.


UNII-2 Channels Disabled on New 1000 Series Access Points for United States, Canada, and Philippines

New Cisco 1000 series lightweight access points for the United States, Canada, and the Philippines do not support the UNII-2 band (5.25 to 5.35 GHz). These models are labeled AP10x0-B, where "B" represents a new regulatory domain that replaces the previous "A" domain.

FCC DFS Support on 1130 Series Access Points

Federal Communications Commission (FCC) dynamic frequency selection (DFS) is supported only on 1130 series access points in the United States, Canada, and the Philippines that have a new FCC ID. Access points use DFS to detect radar signals such as military and weather sources and then switch channels to avoid interfering with them. 1130 series access points with FCC DFS support have an FCC ID LDK102054E sticker. 1130 series access points without FCC DFS support have an LDK102054 (no E suffix) sticker. 1130 series access points that are operating in the United States, Canada, or the Philippines; have an FCC ID E sticker; and are running the 4.1.171.0 software release or later can use channels 100 through 140 in the UNII-2 band.

Inaccurate Transmit Power Display

After you change the position of the 802.11a radio antenna for a lightweight 1200 or 1230 series access point, the power setting is not updated in the controller GUI and CLI. Regardless of the user display, the internal data is updated, and the transmit power output is changed accordingly. To see the correct transmit power display values, reboot the access point after changing the antenna's position. (CSCsf02280)

Setting the Retransmit Timeout Value for TACACS+ Servers

Cisco recommends that the retransmit timeout value for TACACS+ authentication, authorization, and accounting servers be increased if you experience repeated reauthentication attempts or the controller falls back to the backup server when the primary server is active and reachable. The default retransmit timeout value is 2 seconds and can be increased to a maximum of 30 seconds.

Configuring an Access Point's Prestandard Power Setting

An access point can be powered by a Cisco prestandard 15-watt switch with Power over Ethernet (PoE) by entering this command:

config ap power pre-standard {enable | disable} {all | Cisco_AP}

A Cisco prestandard 15-watt switch does not support intelligent power management (IPM) but does have sufficient power for a standard access point. The following Cisco prestandard 15-watt switches are available:

AIR-WLC2106-K9

WS-C3550, WS-C3560, WS-C3750

C1880

2600, 2610, 2611, 2621, 2650, 2651

2610XM, 2611XM, 2621XM, 2650XM, 2651XM, 2691

2811, 2821, 2851

3631-telco, 3620, 3640, 3660

3725, 3745

3825, 3845

The enable version of this command is required for full functionality when the access point is powered by a Cisco prestandard 15-watt switch. It is safe to use if the access point is powered by either an IPM switch or a power injector or if the access point is not using one of the 15-watt switches listed above.

You might need this command if your radio operational status is "Down" when you expect it to be "Up." Enter the show msglog command to look for this error message, which indicates a PoE problem:

Apr 13 09:08:24.986 spam_lrad.c:2262 LWAPP-3-MSGTAG041: AP 00:14:f1:af:f3:40 is unable to 
verify sufficient in-line power. Radio slot 0 disabled.

1000 Series Access Points and Radar Detection

The 1000 series access points perform radar detection on channels that do not require it (such as channel 36). If the access points detect radar on these channels, the controller captures it in log messages.

Controller Functions that Require a Reboot

After you perform these functions on the controller, you must reboot the controller in order for them to take effect:

Switch between Layer 2 and Layer 3 LWAPP mode

Enable or disable link aggregation (LAG)

Enable a feature that is dependent on certificates (such as HTTPS and web authentication)

Add new or modify existing SNMP v3 users

Enable or disable the mobility protocol port using this CLI command:

config mobility secure-mode {enable | disable}

Multicast Queue Depth

The multicast queue depth is 512 packets on all controller platforms. However, the following message might appear on 2006 and 2106 controllers: "Rx Multicast Queue is full on Controller." This message does not appear on 4400 series controllers because the 4400 NPU filters ARP packets, and all forwarding (multicast or otherwise) and multicast replication are done in the software on the 2006 and 2106.

This message appears when too many multicast messages are sent to the CPU. In controller software releases prior to 5.1, multicast, CDP, and ARP packets share the same queue. However, in software releases 5.1 and later, these packets are separated into different queues. There are currently no controller commands that can be entered to determine if the multicast receive queue is full. When the queue is full, some packets are randomly discarded.

2106 Controller LEDs

The 2106 controller's Status LED and AP LED do not flash amber when software is being uploaded to the controller or downloaded to an access point, respectively.


Note Some versions of the Cisco 2106 Wireless LAN Controller Quick Start Guide might incorrectly state that these LEDs flash amber during a software upload or download.


Resetting the Configuration on 2006 Controllers

If you wish to reset the configuration to factory defaults on a 2006 controller, perform one of the following:

From the controller GUI, click Commands > Reset to Factory Default > Reset.

From the controller CLI (after system bootup and login), enter clear config. Then after the configuration has been cleared, enter reset system without saving the current configuration.

From the controller console (after system bootup), enter Recover-Config from the User Name prompt.


Caution Do not attempt to reset the controller's configuration by choosing Option 5, Clear Config, from the boot menu.

Rate-Limiting on the Controller

Rate-limiting is applicable to all traffic destined to the CPU from either direction (wireless or wired). Cisco recommends that you always run the controller with the default config advanced rate enable command in effect in order to rate-limit traffic to the controller and protect against denial-of-service (DoS) attacks. You can use the config advanced rate disable command to stop rate-limiting of Internet Control Message Protocol (ICMP) echo responses for testing purposes. However, Cisco recommends that you reapply the config advanced rate enable command after testing is complete.

Pings Supported to the Management Interface of the Controller

Controller software release 4.1.185.0 or later is designed to support ICMP pings to the management interface either from a wireless client or a wired host. ICMP pings to other interfaces configured on the controller are not supported.

Pinging from a Network Device to a Controller Dynamic Interface

Pinging from a network device to a controller dynamic interface may not work in some configurations. When pinging does operate successfully, the controller places Internet Control Message Protocol (ICMP) traffic in a low-priority queue, and the reply to ping is on best effort. Pinging does not pose a security threat to the network. The controller rate limits any traffic to the CPU, and flooding the controller is prevented. Clients on the WLAN associated with the interface pass traffic normally.

GLBP Not Supported

Controller software release 4.2 or later is not compatible with the Gateway Load Balancing Protocol (GLBP). Make sure to configure the controller's default gateway to a fixed address and not to the GLBP virtual address.

IPSec Not Supported

Software release 4.2.130.0 does not allow you to choose IPSec as a Layer 3 security option. None and VPN Passthrough are the only available options. If you upgrade to this release from a previous release that supported IPSec as a Layer 3 security option, any WLANs that are configured for this feature become disabled. If you want to configure IPSec, you must use a version of controller software prior to 4.0.

4400 Series Controllers Do Not Forward Subnet Broadcasts through Guest Tunnel

As designed, 4400 series controllers do not forward IP subnet broadcasts from the wired network to wireless clients across the EoIP guest tunnel.

Connecting 1100 and 1300 Series Access Points

You must install software release 4.0.179.8 or later on the controller before connecting 1100 and 1300 series access points to the controller.

Preventing Clients from Accessing the Management Network on a Controller

To prevent or block a wired or wireless client from accessing the management network on a controller (from the wireless client dynamic interface or VLAN), the network administrator should ensure that there is no route through which to reach the controller from the dynamic interface or use a firewall between the client dynamic interface and the management network.

Voice Wireless LAN Configuration

Cisco recommends that aggressive load balancing always be turned off either through the controller GUI or CLI in any wireless network that is supporting voice, regardless of vendor. When aggressive load balancing is turned on, voice clients can hear an audible artifact when roaming, and the handset is refused at its first reassociation attempt.

Changing the IOS LWAPP Access Point Password

Cisco IOS Lightweight Access Point Protocol (LWAPP) access points have a default password of Cisco, and the pre-stage configuration for LWAPP access points is disabled by default. To enable it, you must configure the access point with a new username and password when it joins the controller. Enter this command using the controller CLI to push a new username and password to the access point:

config ap username user_id password password {Cisco_AP | all}

The Cisco_AP parameter configures the username and password on the specified access point.

The all parameter configures the username and password on all the access points registered to the controller.

The password pushed from the controller is configured as "enable password" on the access point.

There are some cases where the pre-stage configuration for LWAPP access points is disabled and the access point displays the following error message when the CLI commands are applied:

"ERROR!!! Command is disabled."

For more information, refer to Upgrading Autonomous Cisco Aironet Access Points to Lightweight Mode.

Exclusion List (Blacklist) Client Feature

If a client is not able to connect to an access point, and the security policy for the WLAN and client are correct, the client has probably been disabled. In the controller GUI, you can view the client's status on the Monitor > Summary page under Client Summary. If the client is disabled, click Remove to clear the disabled state for that client. The client automatically comes back and, if necessary, reattempts authentication.

Automatic disabling happens as a result of too many failed authentications. Clients disabled due to failed authorization do not appear on the permanent disable display. This display is only for those MACs that are set as permanently disabled by the administrator.

RADIUS Servers and the Management VLAN

If a RADIUS server is on a directly connected subnet (with respect to the controller), then that subnet must be the management VLAN subnet.

Cisco 1000 Series Access Points and WMM

Cisco 1000 series access points in REAP mode do not support the Wi-Fi Multi-Media (WMM) protocol.

Cisco Aironet 1030 Remote Edge Lightweight Access Points and WPA2-PSK

Cisco Aironet 1030 Remote Edge Lightweight Access Points do not support WPA2-PSK in REAP standalone mode.

Lightweight Access Point Connection Limitations

Cisco Aironet lightweight access points do not connect to the 4400 series controller if the date and time are not set properly. Set the current date and time on the controller before allowing the access points to connect to it.

RADIUS Servers

This product has been tested with CiscoSecure ACS 3.2 and later and works with any RFC-compliant RADIUS server.

Management Usernames and Local Netuser Names

Management usernames and local netuser names must be unique because they are stored in the same database. That is, you cannot assign the same name to a management user and a local netuser.

802.1X and Microsoft Wireless Configuration Manager

Clients using the Microsoft Wireless Configuration Manager and 802.1X must use WLANs configured for 40- or 104-bit key length. Configuring for 128-bit key length results in clients that can associate but not authenticate.

Using the Backup Image

The controller bootloader stores a copy of the active primary image and the backup image. If the primary image becomes corrupted, you can use the bootloader to boot with the backup image.

With the backup image stored before rebooting, be sure to choose Option 2: Run Backup Image from the boot menu to boot from the backup image. Then upgrade with a known working image and reboot the controller.

Home Page Retains Web Authentication Login with IE 5.x

Because of a caching problem in the Internet Explorer 5.x browser, the home page retains the web authentication login. To correct this problem, clear the history or upgrade your workstation to Internet Explorer 6.x.

Rogue Location Discovery Protocol (RLDP)

Enabling RLDP may cause access points connected to the controller to lose connectivity with their clients for up to 30 seconds.

Ad-Hoc Rogue Containment

Client card implementations may mitigate the effectiveness of ad-hoc containment.

Changing the Default Values of SNMP Community Strings

The controller has commonly known default values of "public" and "private" for the read-only and read-write SNMP community strings. Using these standard values presents a security risk. Therefore, Cisco strongly advises that you change these values. Refer to the Cisco Wireless LAN Controller Configuration Guide, Release 4.2 for configuration instructions.

Changing the Default Values for SNMP v3 Users

The controller uses a default value of "default" for the username, authentication password, and privacy password for SNMP v3 users. Using these standard values presents a security risk. Therefore, Cisco strongly advises that you change these values. Refer to the Cisco Wireless LAN Controller Configuration Guide, Release 4.2 for configuration instructions.


Note SNMP v3 is time sensitive. Make sure that you have configured the correct time and time zone on your controller.


Features Not Supported on 2000 and 2100 Series Controllers

These hardware features are not supported on 2000 and 2100 series controllers:

Power over Ethernet (PoE) for 2000 series controllers only


Note Ports 7 and 8 on 2100 series controllers are PoE ports.


Service port (separate out-of-band management 10/100-Mbps Ethernet interface)

These software features are not supported on 2000 and 2100 series controllers:

VPN termination (such as IPSec and L2TP)

Termination of guest controller tunnels (origination of guest controller tunnels is supported)

External web authentication web server list

Layer 2 LWAPP

Spanning tree

Port mirroring


Note Port mirroring is also not supported on 4400 series controllers.


Cranite

Fortress

AppleTalk

QoS per-user bandwidth contracts

IPv6 pass-through

Link aggregation (LAG)

Multicast unicast mode

Some Clients See Only 64 Access Point MAC Addresses (BSSIDs) at a Time

In a crowded RF environment, clients may not be able to detect the desired SSID because of internal table limitations. Sometimes disabling and then enabling the client interface forces a rescan. Your RF environment needs to be controlled. Cisco UWN rogue access point detection and containment can help you to enforce RF policies in your buildings and campuses.

2006 Image Not Supported for 3504 Controllers

The 2006 controller image is supported for use with only 2000 series controllers. Do not install the 2006 image on a 3504 controller. Otherwise, errors may occur. Install only the 3504 image on a 3504 controller.

Running a 3504 Image on a 2000 Series Controller

It is possible to run a 3504 controller image on a 2000 series controller, but Cisco Aironet 1130, 1200, and 1240 series access points will not be able to connect to the controller.

Upgrading External Web Authentication

When upgrading a controller from operating system release 2.0 or 2.2.127.4 to release 3.2.116.21 or later, update the external web authentication configuration as follows:

1. Instead of using a preauthentication ACL, the network manager must configure the external web server IP address using this command:

config custom-web ext-webserver add index IP-address


Note IP-address is the address of any web server that performs external web authentication.


2. The network manager must use the new login_template shown here:


Note Make sure to format the script to avoid any extra characters or spaces before using the web authentication template.


<html>
<head>
<meta http-equiv="Pragma" content="no-cache"> <meta HTTP-EQUIV="Content-Type" 
CONTENT="text/html; charset=iso-8859-1"> <title>Web Authentication</title> <script>
 
   
function submitAction(){
     var link = document.location.href;
     var searchString = "redirect=";
     var equalIndex = link.indexOf(searchString);
     var redirectUrl = "";
     var urlStr = "";
     if(equalIndex > 0) {
            equalIndex += searchString.length;
            urlStr = link.substring(equalIndex);
            if(urlStr.length > 0){
   redirectUrl += urlStr;
         if(redirectUrl.length > 255)
        redirectUrl = redirectUrl.substring(0,255);
       document.forms[0].redirect_url.value = redirectUrl;
  }
     }
 
   
     document.forms[0].buttonClicked.value = 4;
     document.forms[0].submit();
}
 
   
function loadAction(){
     var url = window.location.href;
     var args = new Object();
     var query = location.search.substring(1);
     var pairs = query.split("&");
     for(var i=0;i<pairs.length;i++){
          var pos = pairs[i].indexOf('=');
          if(pos == -1) continue;
          var argname = pairs[i].substring(0,pos);
          var value = pairs[i].substring(pos+1);
          args[argname] = unescape(value);
     }
     //alert( "AP MAC Address is " + args.ap_mac);
     //alert( "The Switch URL is " + args.switch_url);
     document.forms[0].action = args.switch_url;
 
   
     // This is the status code returned from webauth login action
     // Any value of status code from 1 to 5 is error condition and user
     // should be shown error as below or modify the message as it suits
     // the customer
     if(args.statusCode == 1){
        alert("You are already logged in. No further action is required on your 
part.");
     }
     else if(args.statusCode == 2){
        alert("You are not configured to authenticate against web portal. No further 
action is required on your part.");
     }
     else if(args.statusCode == 3){
        alert("The username specified cannot be used at this time. Perhaps the user is 
already logged into the system?");
     }
     else if(args.statusCode == 4){
        alert("Wrong username and password. Please try again.");
     }
     else if(args.statusCode == 5){
        alert("The User Name and Password combination you have entered is invalid. 
Please try again.");
     }
 
}
 
   
</script>
</head>
<body topmargin="50" marginheight="50" onload="loadAction();"> <form method="post"> 
<input TYPE="hidden" NAME="buttonClicked" SIZE="16" MAXLENGTH="15" value="0"> <input 
TYPE="hidden" NAME="redirect_url" SIZE="255" MAXLENGTH="255" VALUE=""> <input 
TYPE="hidden" NAME="err_flag" SIZE="16" MAXLENGTH="15" value="0">
 
<div align="center">
<table border="0" cellspacing="0" cellpadding="0"> <tr> <td>&nbsp;</td></tr>
 
<tr align="center"> <td colspan="2"><font size="10" color="#336699">Web 
Authentication</font></td></tr>
 
<tr align="center">
 
<td colspan="2"> User Name &nbsp;&nbsp;&nbsp;<input type="TEXT" name="username" 
SIZE="25" MAXLENGTH="63" VALUE=""> </td> </tr> <tr align="center" > <td colspan="2"> 
Password &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<input type="Password" name="password" 
SIZE="25" MAXLENGTH="24"> </td> </tr>
 
<tr align="center">
<td colspan="2"><input type="button" name="Submit" value="Submit" class="button" 
onclick="submitAction();"> </td> </tr> </table> </div>
 
   
</form>
</body>
</html>

Caveats

This section lists Open Caveats and Resolved Caveats for Cisco controllers and lightweight access points.

Open Caveats

These caveats are open in controller software release 4.2.130.0.

CSCsb77595—When logging out from Telnet/SSH sessions, the session always prompts the user to save changes, even when no changes have been made.

Workaround: Ignore the prompt and exit as usual.

CSCsd54928—The CPU ACL is unable to block LWAPP packets that are destined for the IP address of the dynamic interface.

Workaround: None.

CSCsd84706—Containment information for ad-hoc rogue access points is not shown on the controller GUI.

Workaround: Use the controller CLI.

CSCsd95723—Some users might be confused when presented with the None and DHCP options for configuring the service port interface in the initial controller setup wizard. These options are available for a controller that has no configuration and the setup wizard is being used to configure it.

Workaround: Users can interpret the None option as Static and a logical alternative to DHCP.

CSCse06202—When a controller's IKE lifetime expires, a rekey is not offered.

Workaround: None.

CSCse06206—The controller sends a DEL notification when the IKE lifetime expires, but it does not send the notice to the client.

Workaround: None.

CSCse87087—A controller with link aggregation (LAG) enabled fails Ethernet link redundancy. This problem occurs when the controller uses an Ethernet copper gigabit interface converter (GBIC) instead of a fiber GBIC and one of two Ethernet cables is pulled out of the GBIC.

Workaround: Clear the configuration on the controller. Then reconfigure the controller and perform the redundancy test.

CSCsf29783—The Cisco WiSM reboots after experiencing a failure with the reaperWatcher mmMfpTask.

Workaround: None.

CSCsg04831—There are not enough debugs to determine the packet flow in the controller for guest access.

Workaround: Use a wireless sniffer trace.

CSCsg48089—If you lose your controller password and have not backed up the configuration, the recovery mechanism is to revert to the factory default settings.

Workaround: None.

CSCsg59235—The controller CLI lacks commands for debugging activity at the IP, ICMP, TCP, UDP, TELNET, SSH, and HTTP layers.

Workaround: Use an external packet capture device to collect packets to and from the controller. Send these packets to the Technical Assistance Center (TAC) for analysis.

CSCsg66040—After a software upgrade, controllers might experience intermittent access to the management interface through HTTPS.

Workaround: Follow these steps to workaround the issue:

a. Make sure HTTPS is enabled on the controller's management interface, reboot the controller from the CLI, and monitor the last service if error messages appear after the controller prompts you to enter a username and password to login.

b. Login with the relevant credentials and reconfigure the virtual interface with this CLI command:

config interface address virtual 1.1.1.1

c. Reboot the controller and make sure the Secure Web service shows up as OK.

d. Generate a certificate using this CLI command:

config certificate generate webauth

e. Click Yes when prompted and wait a few minutes for the certificate to generate.

f. Reboot the controller.

CSCsg68046—The complete reason for a TFTP download failure needs to appear on the controller GUI. If the controller cannot find the software file on the TFTP server during a software upgrade, it reports that the transfer failed rather than that the file is not present.

Workaround: Make sure that the file and filename are entirely correct before upgrading, or upgrade using the CLI to receive a more accurate reason for the failure. Further details are available if you use the debug transfer all enable command prior to upgrade.

CSCsg74578—If you change a controller's management IP address, it is not sent to the access point unless the access point is reset. As a result, multicasting does not work until the change is made on the access point.

Workaround: Reset the access point so that it rejoins the controller and the controller updates the access point with the new configuration.

CSCsg84209—The export foreign controller is not deleting the client device when it receives a HandoffEnd message.

Workaround: None.

CSCsg87111—While editing a WLAN configured for WPA1+WPA2 with a conditional web redirect to 802.1X, the MIB browser shows a commit failure error.

Workaround: Do not directly change from WPA1+WPA2+conditional web redirect to 802.1X+conditional web redirect. Instead, follow these steps:

a. Remove conditional web redirect and save your change.

b. Change Layer2 to 802.1X and save your change.

c. Change Layer3 to conditional web redirect and save your change.

CSCsg88704—When you use the default controller setting of 512 for the controller database size, the following problems may occur:

If you attempt to add a MAC address to a very long MAC filter list, the following error message appears: "Error in creating MAC filter."

If you add a large number of users to the local database, some user entries might be silently ignored.

If you add SSCs for the access points, at some point no more entries can be added, and the following error message appears: "Authorization entry does not exist in Controller's AP Authorization List."

Workaround: Configure a larger value for the controller database, such as 2048.

CSCsg95474—Lightweight access points do not queue disassociation messages, causing the Cisco 7921 phone to remain in a registering loop. This problem occurs when you change the data rate on the access point.

Workaround: Power cycle the 7921 phone.

CSCsh11086—If you press Ctrl-S and Ctrl-Q to pause and restart the output of a command such as debug dot1x event enable, the controller reboots.

Workaround: Do not stop the console using Ctrl-S.

CSCsh15411—When an access point drops the IAPP packet from a CCX client just after association, the CCX Layer 2 roam history may not be available for CCX clients on the controller.

Workaround: None.

CSCsh31104—The word channel is misspelled in the message log.

Workaround: None.

CSCsh96186—Large IP packets that have been split into multiple fragments might fail to be reassembled by a 4400 series controller.

Workaround: Redesign the network and reconfigure the communication endpoints to eliminate any points where such a small fragment could be generated.

CSCsi06191—After you reboot the controller, the master controller mode is disabled.

Workaround: None.

CSCsi13399—The Expiration Timeout for Rogue AP Entries parameter on the Rogue Policies page applies to both rogue access point entries and rogue client entries. The parameter name should be changed to reflect both types of entries.

Workaround: None. This is a cosmetic issue.

CSCsi17242—If a controller starts a timer (such as reauthentication or keylife time) after running for approximately 52 days, the timer might take a long time to fire (up to another 52 days).

Workaround: Clean up the timers. If the problem is related to the client, deauthenticate the client to clean the timer. If the problem is related to the WLAN, such as a broadcast key update, disable and then re-enable the WLAN.

CSCsi26248—You might lose connectivity when adding or recovering a second link aggregation (LAG) link.

Workaround: Recover the LAG link when service is not in use. You might also want to consider not using this type of configuration.

CSCsi29262—When an access point radio is configured to override a WLAN of 32 characters, the access point radio stops beaconing the WLAN.

Workaround: None.

CSCsi30541—Loss of connectivity to the management interface occurs when you add a new dynamic interface and the configured DHCP server on all other interfaces is in the new dynamic interface subnet and the new interface has a shorter mask than the other interfaces.

Workaround: Configure a 10/24 interface or a different 10/16 subnet such that the new dynamic interface does not contain the DHCP server IP address currently defined on all interfaces.

CSCsi40354—Traffic stream metrics (TSM) information is not sorted chronologically on the controller GUI.

Workaround: None.

CSCsi72324—A service port with IP address 0.0.0.0 responds to an ARP for the AP-manager interface.

Workaround: Unplug the service port and reconfigure it on the correct subnet.

CSCsi72578—After you set up the mobility anchor feature between two controllers, the client does not successfully connect to the specified anchor controller when the WLAN QoS profile is set to bronze.

Workaround: Change the WLAN QoS profile on both the internal controller and the anchor controller to silver.

CSCsi72767—A script runs each time you generate a dependency file, which makes the build very slow.

Workaround: None.

CSCsi86794—When auto channel selection is enabled on a controller running 4.1.171.0 or later and access points are set to channels 100, 104, 108, 112, 116, 132, 136, or 140, clients cannot associate.

Workaround: Follow these steps to disable channels 100 to 140. Make sure to disable the radio network and then enable it after the channel change.

a. On the controller GUI, click Wireless > 802.11a/n.

b. Click DCA under RRM.

c. Uncheck all of the channels between 100 to 140.

d. Click Apply to commit your changes.

CSCsj03124—RLDP behavior is inconsistent when initiated from a Cisco 1250 series access point.

Workaround: Use access points other than the 1250 when RLDP needs to be used.

CSCsj06245—Portions of the output of the show tech-support CLI command might be formatted incorrectly, making the information difficult to read.

Workaround: None.

CSCsj10755—When multicast mode multicast and IGMP snooping are enabled, the controller periodically sends out IGMP query messages to the clients. This IGMP query is sent as individual queries to each access point.

Workaround: None.

CSCsj10945—The controller does not factor in the antenna gain when reducing the output power.

Workaround: Manually adjust the antenna gain, but this action can interfere with auto RF.

CSCsj14255—Sometimes the multicast stream to wireless clients stops, and the upstream router does not receive IGMP reports. This problem occurs when there are multiple IGMP requests on the same VLAN and the controller responds only to the last query or when simultaneous IGMP queries are sent from more than five VLANs and the controller responds to only the first five.

Workaround: None.

CSCsj14304—With IGMP snooping enabled, MGIDs are assigned to reserved multicast addresses.

Workaround: Use an upstream ACL if packets with reserved multicast addresses need to be blocked.

CSCsj17054—A misleading message appears on the controller GUI when you upload software or certificates.

Workaround: Ignore the message and choose the correct options to upload files on the controller.

CSCsj29501—When the session slot or telnet command times out on the supervisor on the Cisco WiSM and you try to log in again, any character that you enter is duplicated.

Workaround: Use a direct console connection to the Cisco WiSM.

CSCsj44861—An access point might transmit neighbor messages when it is not connected to a controller.

Workaround: None.

CSCsj54064—The downstream throughput is low when using a long packet size with ACLs on the 4400 series controller and the Catalyst 3750G Wireless LAN Controller Switch.

Workaround: None.

CSCsj59237—The traffic stream metric (TSM) packet count is not reported correctly.

Workaround: None.

CSCsj59441—Channel information for a rogue access point does not appear on the rogue access point report.

Workaround: Enable the rogue access point trap for the registered controllers or view the channel information on the controller.

CSCsj61649—Whenever a log analysis report is generated on a CCXv5 client using WCS, the DHCP and AAA logs are swapped.

Workaround: Use the controller CLI to view this information.

CSCsj67447—When you use the controller GUI to modify an existing (or newly created) guest LAN and you choose an ingress interface that is already in use, no error appears. The error that appears on the CLI should also appear on the GUI: "Ingress interface is in use by some other guest lan."

Workaround: None.

CSCsj85329—The controller GUI should explain how the password changes with RADIUS compatibility mode. The RADIUS server names help users match to their type of RADIUS server, but the server types should be explained:

Cisco ACS—In the RADIUS access-request packet, the username is the client MAC address, and the password is the client MAC address.

Free RADIUS—In the RADIUS access-request packet, the username is the client MAC address, and the password is the controller's shared secret with the RADIUS server.

Other—In the RADIUS access-request packet, the username is the client MAC address, and the password is not sent in the RADIUS access-request packet.

Workaround: None.

CSCsj87925—The controller GUI netmask for an ACL accepts arbitrary values.

Workaround: Enter a valid netmask.

CSCsj88889—WGB and wired WGB clients are shown using different radios.

Workaround: None.

CSCsj88990—Rogue access point client information shown for the access point does not match the client information from the Rogue Client Details link.

Workaround: View the current rogue client information from the controller.

CSCsj92716—A WGB device periodically loses connectivity with the controller.

Workaround: None.

CSCsj96589—Using the MAC address from the label on an 1131 or 1242 access point in the debug mac addr command produces limited debug output.

Workaround: None.

CSCsj97900—The call admission control (CAC) TSPEC is not traffic shaping and allows a new call setup when the physical data rate is higher than one single data rate configured on the controller.

Workaround: Follow the instructions in the VoWLAN deployment guide to enable a realistic higher data rate for the Cisco 7921 phone and turn on the supported rate as recommended.

CSCsk01633—The EAPOL key message is truncated with an invalid replay counter.

Workaround: None.

CSCsk08360—Further clarification is needed on the following message log entry: APF-1-DISCONECT_MOBILE_DUE_TO_WLAN_SWITCH: Disconnecting mobile 00:16:6f:79:82:75 due to switch of WLANs from 2 to 1.

Workaround: None.

CSCsk08401—The formatting for the config paging ? CLI command needs to be corrected.

Workaround: None.

CSCsk08707—The 1250 series access points receive console error messages indicating that the primary discover decode failed.

Workaround: None.

CSCsk15603—On the controller GUI, a conditional web-redirect configured with 802.1X security generates an error.

Workaround: None. Although an error message appears, the user configuration is saved.

CSCsk17001—When a guest LAN with a blank ingress interface name is added to the controller, the application fails with an SNMP exception message.

Workaround: Use the controller CLI to configure a guest LAN. You might need to delete a previous guest LAN if it has a blank ingress interface configured on it and then recreate it. By default, the ingress interface is blank.

CSCsk21007—The controller requires TACACS+ authentication when a configuration setting is changed on the controller GUI or a GUI page is opened.

Workaround: None.

CSCsk22861—An MGID entry is not cleared from the access point when IGMP snooping is disabled.

Workaround: None.

CSCsk49157—When you change the session timeout of a WLAN that is using a backend RADIUS authentication server, any existing client that is using that WLAN shows its reauthentication timeout as infinite, even though there is a finite time after which reauthentication occurs.

Workaround: None.

CSCsk49200—The hybrid-REAP local switching option should be removed for wired guest LANs.

Workaround: None.

CSCsk49282—The guest LAN and WLAN are not clearly differentiated.

Workaround: None.

CSCsk50477—The BCAST_Q_ADD_FAILED message contains typographical errors.

Workaround: None.

CSCsk60655—The default frequency value in the intrusion detection system (IDS) file should be equal to or greater than the maximum deauthentication packets sent by an access point.

Workaround: None.

CSCsk63047—Dynamic transmit power control (DTPC) does not work on Cisco1240 series access points in WGB mode.

Workaround: None.

CSCsk68117—U-APSD state changes on a client device are not updated on the controller.

Workaround: Reboot the access point, or disassociate the client from the controller and then reassociate it.

CSCsk68619—When using an Intel 4965 802.11n client device with a 1250 series access point, the upstream throughput is higher than the downstream throughput.

Workaround: None.

CSCsk70727—A 7921 IP phone in world mode is not connecting to a 4400 series controller with country code KE.

Workaround: Use country code KR instead of KE. Note that this reduces the number of available channels on the 802.11a radio to 149, 153, 157, and 161.

CSCsk74050— If you configure an ACL name with 32 characters, the ACL override fails during roaming.

Workaround: Use ACL names with up to 31 characters.

CSCsk76973—When you upgrade a controller from software release 4.2.61.0 or earlier, access points immediately begin downloading the new software image from the controller instead of waiting until the controller is rebooted and the downloaded image is running on the controller.

Workaround: Disconnect the access point-to-controller path before upgrading the controller from software release 4.2.61.0 or earlier.

CSCsk78264—A change in the RF domain name takes effect only after a reboot.

Workaround: Reboot the controller after changing the RF domain name.

CSCsk79382—CCXv4 and CCXv5 clients receive an Adjacent Access Point Report from the controller even though this report should be sent only to CCXv2 and CCXv3 clients.

Workaround: None.

CSCsk80312—If port 2, 3, or 4 is used for the management interface on a 2006 controller running software release 4.1.185.0, no management access is available after the controller reboots.

Workaround: Use port 1 for the management interface, or assign a different port for the management interface and then change back to the original port using these CLI commands:

config wlan disable wlan_id

config interface port management any_other_port#

config interface port management original_port#

config wlan enable wlan_id

CSCsk83426—A hybrid-REAP access point does not reauthenticate after entering standalone mode.

Workaround: None.

CSCsk85091—If Rogue Location Detection Protocol (RLDP) is enabled on the controller, you may see radio reset messages on the access point console. There may also be a brief interruption in client traffic flow.

Workaround: Disable RLDP.

CSCsk86536—The wrong error message appears when you change country channels with the 802.11a radio enabled.

Workaround: None.

CSCsk86992—Many instances of the following message appear in the controller or WCS trap logs:

MFP Anomaly Detected - 1417 Missing MFP IE event(s) found as violated by the radio 
xx:xx:xx:xx:xx:xx and detected by the dot11 interface at slot 0 of AP 
xx:xx:xx:xx:xx:xx in 300 seconds when observing Probe responses, Beacon Frames. 
Client's last source mac xx:xx:xx:xx:xx:xx 
 
   

Workaround: After you confirm that the cause is not a spoofing attack from a rogue access point, disable and then re-enable the access points identified in the messages. If the problem persists, disable MFP validation on some of the access points, or disable infrastructure MFP globally.

CSCsk99318—Controllers sometimes drop packets for client devices attached to a workgroup bridge when the workgroup bridge roams from one access point to another.

Workaround: None.

CSCsl01005—Sometimes bandwidth contracts do not take effect. If a user who has bandwidth restrictions logs in and logs out and then another user who does not have bandwidth restrictions logs in, the bandwidth restrictions are not removed immediately.

Workaround: Reassociate the user between logout of the old user and login of the new user.

CSCsl03097—When a hybrid-REAP access point in standalone mode is on the DFS channel, the access point's radio goes down if a radar event occurs on its operating channel.

Workaround: Wait until the access point's connectivity to the controller recovers, or reboot the access point.

CSCsl04281—The show run-config command might truncate access point neighbor information in a large environment.

Workaround: To reduce the occurrence of this issue, disable paging using the config paging disable command.

CSCsl06484—While a 1250 series hybrid-REAP access point comes online, you may see the following traceback, which is harmless:

Oct 25 22:21:10.747: WARNING: invalid slot ID (255) passed to REAP -Traceback= 0x51F760 0x51F910 0x4CA740 0x4CDC60 0x4DAB20 0x4BCCBC 0x4BD5E8 0x1CC6DC 0x1CE454

Workaround: None.

CSCsl09066—The WCS access point group VLAN profile configuration does not match the actual WLC configuration when you use multiple interface mapping profiles under the same access point group VLAN where all of the SSIDs start with the same letters or numbers.

Workaround: None.

CSCsl09218—You cannot upload a binary backup from the CLI on controllers running software release 4.2.

Workaround: Upload the XML file from the controller.

CSCsl11352—The console output in software release 4.2 does not indicate which controller an access point joins when you add it to your network.

Workaround: On the access point console, right after you see the "Press Return to get started" message, enter enable mode (the default password is Cisco), and enter this debug command:

debug ip udp

The output shows all UDP packets sent and received by the access point.

CSCsl16445—When an access point radio status is down due to lack of CDP response from a neighboring switch, the controller reports Cause=Unknown. However, it should report Cause=Waiting for CDP response.

Workaround: None; this issue is cosmetic.

CSCsl19025—Controllers do not respond to a device with an IP address that ends in zero, as in x.x.x.0.

Workaround: Change the device's IP address.

CSCsl40018—The hybrid-REAP design and deployment guide incorrectly implies that you can configure NAT on both the hybrid-REAP and controller sides of the network link. In reality, NAT is supported only on the access point side of the network link. The hybrid-REAP design and deployment guide is available at this URL:

http://www.cisco.com/en/US/products/ps10315/products_tech_note09186a0080736123.shtml

Workaround: None.

CSCsl42328—The controller should not allow you to use the IP address of the gateway as the interface address.

Workaround: Make sure that the interface IP address and gateway IP address are different.

CSCsl47720—The link test report for a CCX client generated using the controller GUI does not provide enough information.

Workaround: Use the controller CLI. It always provides the correct link test report, except in cases of a CCX client connected to a hybrid-HREAP access point broadcasting a centrally switched WLAN.

CSCsl48639—An IP address can be configured on a dynamic interface on a controller when that IP address has already been assigned to another device on the network.

Workaround: Check the ARP table on the switch to see if the IP address is bound to a MAC address on the network that is not the controller MAC address.

CSCsl48776—Controllers sometimes incorrectly forward SSC authentication requests to a RADIUS server.

Workaround: None.

CSCsl52203—When you use the controller CLI to create a guest user account, the controller fails to generate a trap log.

Workaround: Use the controller GUI to create guest user accounts.

CSCsl52445—The internal web authentication page on the controller accepts up to 2,047 characters, but the internal web authentication page in WCS accepts only 130 characters.

Workaround: If you need to enter more than 130 characters on the internal web authentication page, use the controller interface instead of WCS.

CSCsl57356—When an 802.11n client is associated to a 1250 series access point, sometimes the client does not show up as 802.11n on the controller GUI and CLI. Instead, the controller shows the associated client using the 802.11a or 802.11b protocol if using the 2.4-GHz or 5-GHz band, respectively. However, the client software shows that the client is connected using the 802.11n protocol and at 802.11n data rates.

Workaround: None.

CSCsl67177—The Catalyst Express 500 (CE500) might lose connectivity to a 4400 series controller when one port of the portchannel is shut down.

Workaround: Unplug and then plug in both Etherchannel links on the CE500 or the controller. Plug in or unplug any device on the CE500.

CSCsl70043—When a client device connects to a secure EAP WLAN and immediately switches to an open WLAN, the access point sends a status 12 association response (which is normal) but sends it from the wrong MAC address and BSSID.

Workaround: On the controller CLI, enter config network fast-ssid-change to allow the client devices to connect without incident.

CSCsl71343—A Buffalo 802.11n client experiences very low TCP throughput on a 1250 series access point with a 5-GHz radio when tested with other clients (the Intel 4965AGN and the Intel 2915ABG).

Workaround: None.

CSCsl72849—On networks with multiple WiSM controllers, a WiSM sometimes reboots when more access points are connected to it than to the others. The WiSM reboots at the mmListen task.

Workaround: None.

CSCsl77058—The word "rogue" is misspelled in one of the WLAN message log statements. The correct statement should be "APF-1-UNABLE_TO_KEEP_ROGUE_CONTAIN."

Workaround: None.

CSCsl79765—When connected to a controller, 1230 series access points containing AIR-MP31G radios sometimes disable the radios and report that no channel is available.

Workaround: Contact Cisco TAC for more information. A Cisco internal-only procedure can be used to update missing environment variables and burn them into a cookie.

CSCsl95615—When a master controller exists on the network, an access point that is joined to a secondary or tertiary controller keeps going back to discovery.

Workaround: Disable the master controller mode.

CSCsm03461—A command is needed to show the ER image or bootloader version that is currently running as well as the one that will be installed on the next bootup. Currently, the bootloader is used to verify if an ER image or bootloader upgrade is successful. However, not all controllers include the bootloader in the ER image.

Workaround: Install the Cisco Unified Wireless Network Controller Boot Software 4.2.112.0 ER.aes file, which contains a new bootloader. A successful transfer and upgrade of the ER file indicates that the ER file has been updated properly.

CSCsm05607— Large user packets may fail to be successfully forwarded in an EoIP mobility/guest tunnel between controllers.

Workaround: Perform one of the following:

Reconfigure the IP endpoints to use smaller MTUs.

If there is an IOS router in the IP path used by the IP endpoints, use ip tcp adjust-mss 1300 or a similar command to get the endpoints to reduce the size of the TCP/IP packets that they transmit.

Redesign the network path between the EoIP tunnel endpoints to eliminate ICMP filters, tunnels, NAT translations, firewalls, and so on so that it can forward 1500-byte IP packets without fragmentation.

CSCsm08623—If the config paging disabled CLI command is entered on the controller, the output of the show msglog command is periodically interrupted with the "Would you like to display the next 15 entries?" prompt.

Workaround: None.

CSCsm12623—The AAA override dynamic VLAN assignment fails with guest tunneling. Clients successfully authenticate, but the IP address is that of the interface the WLAN is associated to on the anchor controller.

Workaround: None.

CSCsm19182—When an 802.11n radio is operating on channel 52 through 140, the channel width is configured for 40 MHz, and a radar event is detected, it is possible for the radio interface to become disabled instead of moving to another channel. This problem occurs when the access point is operating in the vicinity of radar operations or under extreme traffic conditions (when a false radar detection may occur).

Workaround: Disable and re-enable the radio interface.

CSCsm20234—Discovery requests are not replied to when the AP-manager is in a different VLAN than the management interface.

Workaround: Move the AP-manager to the same VLAN as the management interface.

CSCsm25127—When you use the controller CLI in controller software release 4.2.61.0 to add a custom logo to the internal web authentication page, a light green border appears above and to the right of the logo.

Workaround: None.

CSCsm25943—The meaning of the following error message on the controller is not clear. This message does not necessarily imply that any actual "ARP poisoning" is occurring. Rather, this message appears when a WLAN is configured for DHCP Required and a client (after associating to this WLAN) transmits an ARP message without first using DHCP. The client is unable to send or receive any data traffic until it performs DHCP through the controller.

DTL-1-ARP_POISON_DETECTED: STA [00:01:02:0e:54:c4, 0.0.0.0] ARP (op 1) received with 
invalid SPA 192.168.1.152/TPA 192.168.0.206 

Workaround: Perform the following steps:

a. Determine whether you want to force your wireless clients to perform DHCP first, after associating, before they can send IP packets.

If you do, then disable DHCP Required, and you will not encounter this problem.

If you do not, then configure all clients to use DHCP.

b. If the client is configured for DHCP but sometimes still sends IP packets after associating without performing DHCP, then perform the following:

Verify that the client eventually does perform DHCP without undergoing an unacceptable outage. If the outage before performing DHCP is acceptable, then you can ignore this message.

If the client never does perform DHCP after associating, then it can never pass Layer 3 traffic. In this case, either determine how to change the client's behavior so that it always performs DHCP after associating, or simply accept that this client does not work in this application or reconsider your decision to use DHCP Required.

CSCsm32845—The Guest LAN parameter on the Interfaces > Edit page of the controller GUI might cause confusion for users because the guest LAN is used for interfaces involved in wired guest LANs, not for wireless guest WLANs.

Workaround: None.

CSCsm34676—Voice quality might be poor with multicast paging.

Workaround: None.

CSCsm36085—Poor IPTV multicast quality might occur on a controller running software release 4.2.61.0 with IGMP enabled.

Workaround: None.

CSCsm36798—An ACL that is created (but not applied) is not reflected in the controller's running configuration after you download the saved configuration from a TFTP server.

Workaround: None.

CSCsm40870—The following error message should be reworded:

Jan 24 15:20:55.374 apf_80211.c:2552 APF-4-ASSOCREQ_PROC_FAILED: Failed to process an 
association request from00:13:ce:37:8b:ff. WLAN:2, SSID:TMDInternal-WPA. mobile in 
exclusion list or marked for deletion 

The message should read as follows:

ASSOCREQ_PROC_FAILED: Failed to process an association request from 00:13:ce:37:8b:ff. 
WLAN:2, SSID:TMDInternal-WPA. Mobile excluded or marked for deletion. 

Workaround: None.

CSCsm40889—An 1131 access point must be rebooted in order to join a controller running software release 4.2.

Workaround: None.

CSCsm40903—Additional information is needed for the following message: "claspam_lrad.c:1626 LWAPP-6-PORTMAP_ERR: Failed to obtain multicast port map for interface 4, using default index (50)."

Workaround: None.

CSCsm40906—The following message appears on the 2106 controller when multicast is disabled: "claspam_lrad.c:1626 LWAPP-6-PORTMAP_ERR: Failed to obtain multicast port map for interface 4, using default index (50)." No multicast messages should appear when multicast is disabled.

Workaround: None.

CSCsm41794—Every two weeks or so the anchor controller stops serving web authentication pages to the wireless guest clients. The guest clients get an IP address, but they do not get an IP address for their default gateway.

Workaround: Reboot the controller, and guest users should be able to work fine.

CSCsm42355—The controller returns a signed 32-bit integer in the MIB object bsnAPIfSlotId although the published MIB module indicates that the controller should return an unsigned integer. This behavior may cause WCS to misinterpret incoming trap data that is eventually used in reports and graphs.

Workaround: None.

CSCsm45021—When low data rates (less than 2 Mbps) are used, the access point ACK is missing, which can result in sluggish voice calls.

Workaround: None.

CSCsm50601—A Cisco WiSM controller might reboot due to a software failure at mmc_system.c:2089. After the primary WiSM controller reboots, one hundred to several hundred access points fail over to the backup WiSM controller.

Workaround: None.

CSCsm56708—For some rogue clients, the "First Heard" time is after the "Last Heard" time, and the rogue access point MAC address is set to all zeros.

Workaround: None.

CSCsm65043—1240 series access points might stop accepting new clients. In this case, the show controller d1 command shows the following:

Beacon Flags: 0; Beacons are disabled; Probes are disabled 

Workaround: Reboot the access point.

CSCsm71573—When the following message appears, it fills up the entire message log:

mm_listen.c:5078 MM-3-INVALID_PKT_RECVD: Received an invalid packet from 10.0.x.x. 
Source member:0.0.0.0. source member unknown. 

Workaround: None.

CSCsm79901—Wired clients attached to a workgroup bridge (WGB) are retaining the previous IP address after the WGB obtains a new IP address. As a result, the wired client stops sending traffic to the infrastructure network.

Workaround: Release and renew the DHCP IP address manually on the WGB wired client.

CSCsm80423—The controller cannot block Layer2 multicast traffic.

Workaround: None.

CSCsm81195—The controller might stop forwarding client traffic.

Workaround: Reboot the controller.

CSCsm82725—Clients are able to connect to the Internet without authenticating when using web authentication and port 53 on a proxy server.

Workaround: None.

CSCsm82984—When a controller and an access point are brought up with factory default settings, you can Telnet to the access point (even though the show ap config general Cisco_AP CLI command shows the Telnet feature as disabled). Also, once Telnet and SSH are enabled, they are not disabled after you clear the controller's configuration (even though the output of the show command indicates that they have been disabled).

Workaround: None.

CSCsm84952—When you configure wired and wireless guest WLANs on two controllers, a wired guest user obtains an IP address but does not always receive the web authentication page or cannot login properly. Additionally, a reattempt by the wired client might result in obtaining an IP address from the other controller, causing the client to appear to have been handed an IP address from each controller.

Workaround: Disable the wired guest WLAN on one of the controllers and enable it as needed. Using an external DHCP server might resolve this issue as well.

CSCsm85717—The following error message needs to identify the root cause of the problem:

sntp_main.c:441 SNTP-4-PKT_REJECTED: Spurious.NTP packet rejected on socket. 

Workaround: None.

CSCsm89253—The controller should log a message if it sends "Telnet is not allowed on this port" to Telnet clients.

Workaround: None.

CSCsm94067—1100 and 1200 series access points that have been converted to lightweight mode do not retain the power injector state after a reboot. This setting is enabled on the access point; however, when the access point reboots, it shows as not being enabled on the controller.

Workaround: Manually enable the power injector state after the access point is rebooted.

CSCsm94702—When the controller is configured through the service port, the VLAN ID and port information do not appear in the output of the show int summary CLI command.

Workaround: None.

CSCsm95478—HT protection bits might incorrectly report the operating mode.

Workaround: None.

CSCsm95928—A 4400 series controller might reboot due to an NPU lockup.

Workaround: None.

CSCsm96105—The controller does not pass traffic to a client device with a MAC address beginning with 00:00:00:00. This issue occurs with both WGB and wireless clients.

Workaround: None.

CSCsm97249—Using the controller GUI, users cannot override the global configuration for web authentication in a guest WLAN.

Workaround: Use the config guest-lan custom-web global disable guest_lan_id CLI command to disable the global configuration.

CSCsm97258—An 1130 series access point might reboot with "%SYS-2-BADSHARE: Bad refcount in pool_getbuffer, ptr=CFFB."

Workaround: None.

CSCsm98659—The clcCdpGlobalEnable SNMP variable cannot be set on the controller unless there is at least one access point present on the controller. This creates problems when trying to add a new controller to WCS. When you create a new controller template on WCS and set the Global CDP on APs value to false, the template cannot be pushed out to any controller that does not have an access point associated to it.

Workaround: Add an access point to the controller. Then you can add the controller to WCS or change the CDP parameter.

CSCso02340—The controller might report a different power level than is actually used by the access point if you change the channel from one supporting one transmit power to another supporting a different transmit power.

Workaround: Reapply the power configuration.

CSCso02467—When logging into a lobby ambassador account, you are able to create permanent guest user accounts by setting all parameters to "0." After logging back into the account, you can verify that these permanent accounts were created under Security > Local Net Users.

Workaround: None.

CSCso04989—The controller does not acknowledge video and voice streams from the client for about 60 ms. This problem occurs when WMM is used with Intel 4965 clients on Windows Vista.

Workaround: None.

CSCso07457—When the controller downloads a file using FTP, WCS shows the previous transfer state as the intermediate state, which is different from the final transfer state.

Workaround: None.

CSCso31640—When you downgrade a 2100 series controller from software release 5.1 to software release 4.2.112.0, any hybrid-REAP groups configured on the controller are lost after the downgrade.

Workaround: None. You must reconfigure the hybrid-REAP groups.

CSCso51413—When a 1240 series access point is associated to a home access point, the access point console might show the following error message: "Message decoding failed."

Workaround: None.

CSCso88530—When a large number of clients are connecting and disconnecting over a long period of time, the controller might reboot due to a missed software watchdog at the "TempStatus" task.

Workaround: None.

CSCso92179—The CIDS sensor allows an invalid server IP address to be configured.

Workaround: None.

CSCso97776—If you enable MFP when a guest LAN is configured, the controller might show unwanted logs.

Workaround: None.

CSCso99735—The mobility code might not properly handle retransmissions during 4.2/4.1 mobility interoperability.

Workaround: None.

CSCsq01766—When you change an access point's radio configuration, it sends a deauthentication request using the wrong BSSID.

Workaround: None.

CSCsq01789—When a client sends data packets to an access point without acknowledging a previously sent deauthentication request from the access point, the access point continues to acknowledge unassociated clients without sending a deauthentication request.

Workaround: None.

CSCsq02799—The access point sends beacons while DFS scanning is in process.

Workaround: None.

CSCsq06690—The following log might appear unexpectedly on the controller: "Memory 0x3022c8e0 has been freed!"

Workaround: None.

CSCsq11933—The controller GUI should show additional client counters, such as device type, rates, current, supported rates, power save, connection-related statistics, and APSD-related information.

Workaround: None.

CSCsq14326—A 4400 series controller using a Cisco ACS as a TACACS+ server does not log these CLI commands into the ACS:

config hreap group name add

config hreap group name ap add 00:1c:58:34:40:cc

config hreap group name ap add 00:1a:a1:3f:07:08

config hreap group name delete

Workaround: None.

CSCsq14961—SNMP returns only one record for client roam reports whereas the controller CLI shows multiple records.

Workaround: None.

CSCsq15061—A guest client's fragmented packets that are sent over the EoIP tunnel from the foreign controller to the anchor controller are not getting reassembled properly.

Workaround: None.

CSCsq19430—The GUI of a 2106 controller shows a guest LAN interface, even though it is not supported.

Workaround: None.

CSCsq20148—The apfRogueTask is leaking 316 bytes of memory periodically with only one access point connected.

Workaround: None.

CSCsq22827—The access point name sometimes disappears from the controller GUI and CLI.

Workaround: None.

CSCsq23766—A Hifn module installed on a controller running software release 4.2.61.126 might not be initialized.

Workaround: None.

CSCsq23968—When you configure the management user authentication priority order through SNMP using the MIB browser, the controller allows you to configure an invalid priority order and to remove all of the authentication methods from the list.

Workaround: None.

CSCsq25129—A controller software upgrade might fail with a Nessus scan running.

Workaround: None.

CSCsq26051—When a Cisco terminal server connects to the controller but the user is not logged in through the console, the controller might hang after a reboot.

Workaround: None.

Resolved Caveats

These caveats are resolved in controller software release 4.2.130.0.

CSCsd52483—If you use Option 3 from the controller's boot menu to install a controller software release or an ER.aes file, the bootup process halts, and the controller stops responding. The controller also displays the "grub>" prompt on the console port. This problem affects the following controllers: 2000 series, 2100 series, and the Controller Network Module.

CSCsf23288—Some clients that are configured for WPA2 might send encrypted data immediately after the four-way handshake. If this occurs before the encryption key gets plumbed on the access point, a WEP decryption error might result.

CSCsj48872—After you upgrade the controllers in a Cisco WiSM from software release 4.0.206.0 to 4.1.171.0, both of the controllers may reboot repeatedly.

CSCsj56899—The controller does not send the hostname or IP address in the syslog message header, making it difficult to determine which controller sent the message.

CSCsj95069—The web authentication login page on the 2106 controller does not have the Cisco logo.

CSCsk54969—A controller might stop redirecting wireless clients on a WLAN that uses web authentication to the web authentication login page. When this problem occurs, the debug pm ssh-engine enable command shows output similar to the following:

Tue Apr 1 11:12:23 2008: 
SshPmStMain/pm_st_main.c:1954/ssh_pm_st_main_batch_addition_result:Failed to add rule 
to the engine: restoring old state
Tue Apr 1 11:12:23 2008: 
SshEnginePmApiPm/engine_pm_api_pm.c:1896/ssh_pme_enable_policy_lookup: Could not 
allocate message
Tue Apr 1 11:12:28 2008: SshPmRules/pm_rules.c:639/ssh_pm_rule_delete: Trying to 
delete an unknown rule 43723
Tue Apr 1 11:12:28 2008: SshPmRules/pm_rules.c:639/ssh_pm_rule_delete:Trying to delete 
an unknown rule 43724
Tue Apr 1 11:12:28 2008: SshPmRules/pm_rules.c:639/ssh_pm_rule_delete:Trying to delete 
an unknown rule 43725
Tue Apr 1 11:12:29 2008:SshEnginePmApiPm/engine_pm_api_pm.c:1873/ 
ssh_pme_disable_policy_lookup:Could not allocate message 

Browsing to https://1.1.1.1 does work. If browsing to this address does not work when you encounter these symptoms, then you are not encountering this bug.

CSCsk93537—With four Intel 4965 clients simultaneously sending upstream TCP traffic, the aggregate throughput drops to 25% of the traffic capacity of the radio.

CSCsl29563—When you set up the syslog server on the controller GUI and disable it on the GUI, the CLI does not accept the add syslog server command until you use the CLI to delete host 0.0.0.0 manually.

CSCsl33441—You cannot use the controller GUI to change the syslog filter level.

CSCsl51368—Some 802.11n client devices successfully connect to an access point but cannot pass traffic until they are rebooted.

CSCsl61657—When the 802.11g network is enabled on the controller, wireless clients that support only long slot time (20 microseconds) have difficulties associating to access points.

CSCsl90630—The dynamic channel allocation (DCA) function on the controller requires that one non-DFS channel be enabled on a controller. However, this requirement contradicts EU rules for outdoor WiFi deployment.

CSCsl94136—The controller might reboot due to a software failure of the osapiTimer task at the instruction located at 0x103392c0 (osapiTimerHandler+252).

CSCsl94719—The Preview button on the controller GUI shows the internal default web page, even if you chose Customized for the Web Authentication Type.

CSCsm04622—The CPU ACL does not filter traffic to dynamic interface addresses.

CSCsm11640—The controller might reboot due to a software failure of the SNMPTask at the instruction located at 0x10582794 (CmpOIDWithLen+128).

CSCsm20279—When an access point that has been converted to lightweight mode is on the same subnet as its controller's AP-manager interface, it intermittently enters a state where some (but not all) of its LWAPP packets that are addressed at the IP layer to the AP-manager IP address are instead addressed at the MAC layer to the access point's default IP gateway.

CSCsm21340—The controller might reboot due to a software failure of the pemReceiveTask at the instruction located at 0x100bb080 (PES_rqst_exec_again+264).

CSCsm24535—On a 4400 series controller running software release 4.2.61.0, there is no option on the WLANs > Edit (Security > Layer 3) page to enable the Over-ride Global Config feature for an external web authentication bundle configured as Customized Downloaded on the Web Login page if you choose Passthrough as the Layer 3 web policy.

CSCsm25963—A 1240 series access point radio might report +127 dB for noise across all channels. This condition occurs when the radio is in the reset state but appears to the controller to be UP.

CSCsm25987—Users are unable to add a RADIUS server to a wired guest LAN using the controller GUI.

CSCsm31814—A global configuration of custom web authentication using the controller CLI might be disabled after a WLAN is deleted and then recreated.

CSCsm44025—The following unclear error message appears when you change the Web Authentication Type parameter from Internal (Default) to Customized (Downloaded) on the Web Login page without first disabling the WLAN: "Error! Please look up custom-web information and disable Web-Auth/Web-Passthrough WLAN's with Global Status set."

CSCsm45147—An error is not produced when you delete an interface mapped to an access point group VLAN. Instead, the access point group VLAN mapping retains the deleted interface in the configuration.

CSCsm50322—The controller GUI and WCS do not indicate when the database has reached the maximum number of local net users.

CSCsm50774—The controller might reboot due to a failure of the apfReceiveTask software watchdog.

CSCsm52401—Sometimes one-way audio might suddenly occur.

CSCsm78567—Access points running software release 4.1 or 4.2 might reload or disconnect from the network after a variable uptime due to a memory leak on CDP processing in the access point. The time between access point reloads might depend on the CDP rate received by the access point.

CSCsm80066—When a controller receives an ARP request with its own IP address as the source, it stops responding to Telnet and GUI connections.

CSCsm95615—A sequence ID difference exists between the 2100 and 4400 series controllers.

CSCsm95651—Multiple controllers running software release 4.1.185.0 might reboot spontaneously, without generating a crash log.

CSCsm96307—A controller might reboot unexpectedly following a period of high CPU utilization charged to the SNMPtask. This condition triggers a Reaper timeout and a system reset.

CSCsm97315—While installing a web authentication certificate, the controller fails with an invalid password error. This problem occurs only on controllers that have been upgraded from software release 4.1.

CSCsm99941—Controllers running software release 4.2 or 5.0 might reboot and create a crash log. This behavior occurs frequently if rogue client and access point polling is enabled through WCS on the Location Appliance. If the default polling interval for rogue clients and access points is used, the controller might reboot every 10 minutes.

CSCso15640—The controllers in the Cisco WiSM might reboot due to a software failure of the instruction located at 0x1036f2ac (debugPrintMessage2+288).

CSCso17455—Controllers sometimes reboot when SSH is enabled.

CSCso27775—The controller logs show several error messages on one line only (both on the CLI and on the syslog server). The error message is truncated, so it does not reach the carriage return in the end. This error message appears when several access points are trying to join a controller that is already at full access point capacity.

CSCso27809—When a 1000 series access point is configured with a static IP address, domain name, and DNS server, it still uses the DNS domain name obtained from a DHCP INFORM request, ignoring the statically configured domain name. This behavior may break the discovery process through the DNS mechanism because the DNS query can no longer match the configured name.

CSCso30745—When a packet fails the admission control test because the switch fabric cell buffers corresponding to its stream are full, it is incorrectly forwarded to the CPU instead of being discarded. This incorrect forwarding of many such packets could cause an overload of the CPU and a Reaper reset.

CSCso36248—The LDAP username is limited to 24 characters in controller software release 4.2.112.0.

CSCso40917—The FPGA link might stop working, causing the access points to disconnect from the controller and preventing the controller from being managed by any port other than the service port. The NPU Check Task or a similar task should monitor the status of the FPGA link.

CSCso42187—A 1010 series access point reboots intermittently. The syslog displays the following message: "Max retransmissions reached on AP. AP xx:xx:xx:xx:xx:xx associated. Last AP failure was due to AP reset."

CSCso43852—A controller running software release 4.2.112.0 might reboot due to a software failure of the apfReceiveTask at mmParsePayload.

CSCso44508—When link aggregation (LAG) is enabled on the controller, the ipAdEntIfIndex value is not listed in the ifIndex.

CSCso53317 —RFID tag reports show missing sequence IDs for CCX tags.

CSCso58911—After a controller is upgraded to software release 4.2.112.0, it no longer executes the Java pop-up window on the custom web authentication bundle login page.

CSCso62862—You cannot edit the TACACS+ priority using SNMP on a 4400 series controller running software release 4.2.112.0.

CSCso62922—EAP authentication fails for clients when the controller is under high load. In the 802.1X debugs, the client responds to the identity request, but the controller does not seem to process it and times out the authentication.

CSCso62975—When Vista clients use an external DHCP server from the anchor controller, the server drops the reply to the clients due to an invalid mobility state on the foreign controller.

CSCso66819—The service port on a Cisco WiSM running software release 5.0.148.0 might become unreachable after some time. The WiSM remains reachable from the management interface, and the access point and client connection is not affected.

CSCso73067—Sometimes after a 7921 phone authenticates to a 1010 series access point, the phone becomes idle and enters a "configuring IP" loop.

CSCso74625—A 4400 series controller running software release 4.2.112.0 might reboot with task name dot11a.

CSCso81687—A forwarding failure occurs when an orphan packet is sent to the CPU using the slow path. The following message appears on the console: "NP3400_interrupt.c 3663: In `NP3400_BSN_process_frame_rx' Unknown packet type 0."

CSCso81725—The controller's broadcast module is replicating CDP packets to all connected access points even if multicast is disabled. In addition, the controller is replicating broadcast orphan packets from a client even when multicast and broadcast are disabled.

CSCso89810—When you downgrade a controller from software release 5.0.148.0 to 4.2.112.0, the LWAPP mode automatically changes from Layer 3 to Layer 2, and the AP-manager disappears and cannot be recreated.

CSCso90721—When the controllers in a Cisco WiSM are running software release 4.1.112.0, they might reboot three times due to a software failure of the dtlArpTask software watchdog.

CSCso95257—During WPA2+PSK roaming, clients might timeout during authentication.

CSCso97157—A memory leak might occur in the 4.2 mobility code.

CSCso98021—A software watchdog needs to be implemented in the 2106 controller.

CSCso98915—A controller running software release 4.0.219.0 or 4.2.112.0 might reboot during the emweb process.

CSCsq13407—The dot1x tree might become corrupted as the tree lock is not being acquired prior to entries being deleted from the tree.

If You Need More Information

If you need information about a specific caveat that does not appear in these release notes, you can use the Cisco Bug Toolkit to find caveats of any severity. Click this URL to browse to the Bug Toolkit:

http://tools.cisco.com/Support/BugToolKit/

(If you request a defect that cannot be displayed, the defect number might not exist, the defect might not yet have a customer-visible description, or the defect might be marked Cisco Confidential.)

Troubleshooting

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

http://www.cisco.com/en/US/support/index.html

Click Product Support > Wireless. Then choose your product and Troubleshooting to find information on the problem you are experiencing.

Documentation Updates

This section lists updates to user documentation that has not yet been added to either printed or online documents.

Omissions

The Package Contents section in the Quick Start Guide: Cisco 4400 Series Wireless LAN Controllers should be updated to include this item, which is included with the 4400 series controller:

DB-9-to-DB-9 null modem cable

Related Documentation

For additional information on the Cisco controllers and lightweight access points, refer to these documents:

The quick start guide for your particular controller or access point

Cisco Wireless LAN Controller Configuration Guide

Cisco Wireless LAN Controller Command Reference

Cisco Wireless Control System Configuration Guide

Click this link to browse to the Cisco Support and Documentation page:

http://www.cisco.com/cisco/web/support/index.html

Obtaining Documentation, Support, and Security Guidelines

For information on obtaining documentation, obtaining support, providing documentation feedback, security guidelines, and also recommended aliases and general Cisco documents, see the monthly What's New in Cisco Product Documentation, which also lists all new and revised Cisco technical documentation, at:

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