Table of Contents
These release notes describe open and resolved caveats for release 18.104.22.168 for Cisco 2100, 4400, and 5500 Series Wireless LAN Controllers; Cisco Wireless Services Modules (WiSMs); Cisco Wireless LAN Controller Network Modules; Catalyst 3750G Integrated Wireless LAN Controller Switches; Cisco 3201 Wireless Mobile Interface Cards (WMICs); Cisco Aironet 1100, 1130, 1200, 1230AG, 1240, 1250, 1300, AP3500, AP1260, AP 1040, and AP801 Series Lightweight Access Points; Cisco Aironet 1130AG, 1240AG, 1522, and 1524 Mesh Access Points, which comprise part of the Cisco Unified Wireless Network (UWN) Solution.
- Cisco Unified Wireless Network Solution Components
- Controller Requirements
- MIB Files
- New Features
- Software Release Information
- Upgrading to a New Software Release
- Installation Notes
- Using the Cisco 5500 Series Controller USB Console Port
- Important Notes for Controllers and Nonmesh Access Points
- Important Notes for Controllers and Mesh Access Points
- Documentation Updates
- Related Documentation
- Obtaining Documentation and Submitting a Service Request
- Software release 22.214.171.124 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 7.0.164
- Cisco WCS Navigator 1.5.X.X
- Location appliance software release 6.0.X.X
- Mobility services engine software release 6.0.X.X and Context Aware Software
Note Client and tag licenses are required in order to retrieve contextual (such as location) information within the Context Aware Software. See the Release Notes for Cisco 3350 Mobility Services Engine for Software Release 6.0 for more information.
- Cisco 3350, 3310 Mobility Services Engines
- Cisco 2100 Series Wireless LAN Controllers
- Cisco 4400 Series Wireless LAN Controllers
- Cisco 5500 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 1130AG, 1240AG, 1522, and 1524 Mesh Access Points
- Cisco Aironet 1100, 1130, 1200, 1230AG, 1240, 1250, AP1260, 1300, AP3500, AP 1040 and AP801 Series Lightweight Access Points
Note The 801 access point (the access point embedded in the 88xW ISR), the 1250 series access point, and the 1140 series access point 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.
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).
- Windows XP SP1 (or later) or Windows 2000 SP4 (or later)
- Internet Explorer 6.0 SP1 (or later) or Mozilla Firefox 126.96.36.199 (or later)
Cisco controllers support standard SNMP Management Information Base (MIB) files. MIBs can be downloaded from the Software Center on Cisco.com. Only one MIB is posted per major release (188.8.131.52, 6.0, 5.2, 5.1, and so on). If an updated MIB becomes available, the previous version is removed from the Software Center and replaced by the new version.
Interference Detection and Classification — CleanAir can classify over 20 different types of interference within 5 to 30 seconds. A custom chipset is optimized to allow detection of non-Wi-Fi wireless transmissions while simultaneously serving network traffic. Because the detection and classification takes place on inline silicon, rather than in software that consumes processing power, the 3500 Series produces interference visualizations that are much more detailed and precise than those produced by competing systems. This feature enables more intelligent decisions and policies, for automatic remedial action and faster troubleshooting.
Per-Interference Severity Impact — CleanAir provides full visibility into the performance and security of the wireless network with an easy to read air quality index that identifies problem areas and locates them in the context of access point, floor, building, and campus. An air quality index provides a snapshot of the performance and impact of interference on the wireless network. Network administrators can set alerts so that they are notified when air quality falls below a desired threshold. The system can also be configured to automatically enforce security or management policies. Cisco CleanAir generates reports to help network administrators prioritize interference issues that require immediate attention and easily drill down into the details for further network analysis.
Air Quality by Access Point — Administrators can now get an air quality rating on a per radio basis to gauge the impact of interference on the network. This feature provides advanced troubleshooting capabilities that allow organizations to view and use real-time interference data from individual CleanAir access points through the WLAN controller GUI or CLI. Administrators can quickly understand the severity and impact of non-Wi-Fi interference on network performance. This feature enables more intelligent decisions and policies for automatic remedial action and faster troubleshooting.
Air Quality Index Alarm Threshold — This feature provides 24 x 7, on-demand network monitoring. It automatically sends alerts when user-defined thresholds are exceeded for enhanced visibility and control. Air quality thresholds generate alerts, are user configurable and can be used by any SNMP trap receiver for simple integration into existing network management infrastructure.
Rapid Update Mode — Real-time air quality charts show interferers per CleanAir access point. Power and channel utilization is updated at 30-second intervals. Organizations can use these charts to quickly view the impact of interference in near real-time and on a per radio, per channel basis.
Spectrum Expert Connect Mode — Any CleanAir access point can be configured as a network-connected sensor. Administrators can instantaneously access any network location covered by a CleanAir access point using the Spectrum Expert configuration. This feature improves response time and eliminates the need for travel to analyze interference data.
Interference Alarms Sent as SNMP Messages — This feature allows the use of industry-standard SNMP interfaces to monitor the presence and severity of non-Wi-Fi interference on many network management platforms. Each time an interference device is classified by a CleanAir access point, details about the device type and severity of impact are transmitted via Simple Network Management Protocol (SNMP) messages.
Spectrum Management Information Base (MIB) — This feature allows organizations and integrators to create their own suite of network monitoring applications using CleanAir data. An industry-standard spectrum MIB was created to support third-party products in integrating with CleanAir technology.
Event-Driven Radio Resource Management — Interference data from Wi-Fi and non-Wi-Fi devices is detected and classified by CleanAir access points and then integrated into radio resource management (RRM) technology for automatic interference mitigation. RRM intelligently and automatically adjusts network settings and channels to avoid RF interference and optimize network performance. This feature increases network reliability and reduces false positives associated with measurements based on Wi-Fi only.
Persistent Device Avoidance —CleanAir access points remember intermittent yet destructive interference and avoid the channels with the interference. CleanAir can determine if interference is persistent from a stationary source, even from an intermittent device such as a microwave oven, video camera, or network bridge link. The access points within range of the interference will change channels and will remember to avoid the impacted channels in the future.
Cisco OfficeExtend, Enterprise Wireless Mesh and Control and Provisioning of Wireless Access Points (CAPWAP) data encryption advanced features are now included in the wireless controller base license.
Passive client support establishes TCP/IP communication with wireless clients configured with static IP addresses without any manual configuration changes on the client. With this feature, the controller supports clients that associate with the network and go into sleep mode without requiring reauthentication.
SIP call admission control provides bandwidth reservation for Session Initiation Protocol (SIP)-based voice calls. Historically, bandwidth is reserved via Traffic Specification (TSpec) but most SIP clients do not support TSpec, which prevents bandwidth reservation. This feature enables the Controller to provision the bandwidth requirement for SIP calls and allocate or reserve bandwidth on per-usage or per-call basis.
This feature is applicable for non-TSPEC based SIP Calls. SIP Call Snooping should be enabled, only if there are non-TSPEC SIP based clients. We recommend that you use the SIP CAC feature only with static CAC.
Load-based CAC statistics are based on the AP Radio statistics that take into consideration 802.11e QoS information in the 802.11 packets. If there are any SIP-based voice calls from clients that do not have 802.11e QoS support, those calls will not be taken into account to limit calls based on Load-based CAC.
You can configure the SIP CAC feature to set a maximum call limit. This feature must be configured only for SIP-based CAC to limit the number of calls per radio. By default, this feature is disabled. The default value for maximum number of calls is 0, which indicates there is no check for Max call limit.
Note The Max call limit feature is applicable only for non-TSPEC SIP based Calls, even though it counts TSPEC based calls if configured. This feature has a known limitation wherein, there is no option to set a limit for roaming-in calls. The Max Call limit includes both direct and roaming-in calls. If the maximum call limit is reached, new or roaming-in call will fail.
The controller uses the management interface as identity. If the RADIUS server is on a directly connected dynamic interface, the traffic is sourced from the dynamic interface. Otherwise, the management IP address is used.
Cisco Controller Release 184.108.40.206 has been awarded Federal Information Processing Standard (FIPS) 140-2 validation. The following Cisco WLAN controllers and access points have received FIPS 140-2 Level 2 validation: the Cisco 5508 WLAN Controller; the Cisco Wireless Integrated Services Module (WiSM); the Cisco 4400 Series WLAN Controllers; the Cisco 3750G WLAN Controller; the Cisco Aironet Lightweight Access Points: 3502i, 3502e, 1262, 1142, 1252, 1524, 1522, 1131, and 1242. The NIST Security Policies and FIPS certificates for these modules can be downloaded at the NIST web site: http://csrc.nist.gov/groups/STM/cmvp/documents/140-1/1401vend.htm
The 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, you should 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 220.127.116.11 or later, and the Supervisor 720 12.2(18)SXF5 (Cisco IOS Software Modularity) supports the Cisco WiSM software release 18.104.22.168 (with Cisco IOS Software Modularity).
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.
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.
- Before you download a software image or an ER.aes file to a 2100 series controller or a controller network module, use the show memory statistics CLI command to see the current amount of free memory. If the controller has less than 90 MB of free memory, you need to reboot it before downloading the file.
- Before you use an AP801 series lightweight access point with controller software release 22.214.171.124, you must upgrade the software in the Cisco 860 and 880 Series Integrated Services Routers (ISRs) to Cisco IOS 12.4(22)T and the software in the Cisco 890 Series Integrated Services Router to Cisco IOS 12.4(22)YB.
- Make sure you have a TFTP or FTP server available for the software upgrade. Keep these guidelines in mind when setting up a TFTP or FTP server:
– Controller software release 126.96.36.199 is larger 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 188.8.131.52 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 or FTP 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.
- The AP-count evaluation licenses for the 7.0 and the 6.0 releases are different. If you downgrade from a 7.0 release to a 6.0 release, you must activate the AP-count evaluation license of the 6.0 release after you downgrade. Similarly, if you upgrade from a 6.0 release to a 7.0 release, you must activate the AP-count evaluation license of the 7.0 release after you upgrade. If you do not activate the AP-count license, then the AP-count is shown as 0.
- You can upgrade or downgrade the controller software only between certain releases. In some instances, you must first install an intermediate release prior to upgrading to software release 184.108.40.206. Table 1 shows the upgrade path that you must follow before downloading software release 220.127.116.11.
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 18.104.22.168 software. In large networks, it can take some time to download the software on each access point.
- We recommend that you install the Cisco Unified Wireless Network Controller Boot Software 22.214.171.124 ER.aes file on all controller platforms. This file resolves CSCsm03461 and is necessary in order for you to view the version information for ER.aes files in the output of the show sysinfo CLI command. If you do not install this ER.aes file, your controller does not obtain the fix for this defect, and “N/A” appears in the Emergency Image Version field in the output of this command.
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 (126.96.36.199 ER.aes) ensures that the boot software modifications in all of the previous and current boot software ER.aes files are installed.
Table 2 lists the controller software releases that support specific Cisco access points. The First Support column lists the earliest controller software release that supports the access point. For access points that are not supported in ongoing releases, the Last Support column lists the last release that supports the access point.
-A and N: 188.8.131.52 or 5.2 or later1
Table 3 describes the configuration used for testing the clients.
Table 4 lists the versions of the clients. The traffic tests included data or voice. The clients included laptops, handheld devices, phones, and printers.
Caution Before upgrading your controller to software release 184.108.40.206 in a mesh network, you must comply with the following rules.
Table 5 outlines the upgrade compatibility of controller mesh and nonmesh releases and indicates the intermediate software releases required as part of the upgrade path.
- You can upgrade from 220.127.116.11M and 18.104.22.168M to 22.214.171.124 without any configuration file loss. See Table 5 for the available upgrade paths.
Note If you downgrade to a mesh release, you must then reconfigure the controller. We recommend that you save the configuration from the mesh release before upgrading to release 126.96.36.199 for the first time. Then, you can reapply the configuration if you need to downgrade.
- You cannot downgrade from controller software release 188.8.131.52 to a mesh release (for example, 184.108.40.206, 220.127.116.11M, or 4.1.192.xM) without losing your configuration settings.
- Configuration files are in the binary state immediately after upgrade from a mesh release to controller software release 18.104.22.168. After a reset, the XML configuration file is selected.
- Do not edit XML files.
- Any field with an invalid value is filtered out and set to default by the XML validation engine. Validation occurs during bootup.
- If you upgrade the controller from software release 4.1.191.xM to 4.1.192.xM and then to software release 22.214.171.124, the controller might reboot without a crash file. To work around this problem, manually reset the controller without saving the configuration after you upgrade the controller to software release 126.96.36.199. Also, make sure to check the RRM configuration settings after the reset to verify that they are correct (CSCsv50357).
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.
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 188.8.131.52 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.
Note In controller software release 5.2 or later, the WLAN override feature has been removed from both the controller GUI and CLI. If your controller is configured for WLAN override and you upgrade to controller software release 184.108.40.206, the controller deletes the WLAN configuration and broadcasts all WLANs. You can specify that only certain WLANs be transmitted by configuring access point groups. Each access point advertises only the enabled WLANs that belong to its access point group.
Note If a WiSM controller is heavily loaded with access points and clients and is running heavy traffic, a software upgrade sometimes causes an Ethernet receive-path lockup and the hardware watchdog sometimes trips. You might need to reset the controller to return to normal operation.
Note Do not install the 220.127.116.11 controller software file and the 18.104.22.168 ER.aes boot software file at the same time. Install one file and reboot the controller; then install the other file and reboot the controller.
Note When upgrading from 22.214.171.124 to 126.96.36.199 release, access points with names that contain spaces will lose their configured name after the space. For example, if an access point was named “APTestName 12”, after upgrade, when the access point rejoins the controller, the name is truncated to “APTestName”.
g. If you chose Standalone Controllers in Step Click Standalone Controllers or Integrated Controllers and Controller Modules., click Wireless LAN Controller Software .
h. If you chose Cisco Catalyst 6500 Series/7600 Series Wireless Services Module (WiSM) in Step Click a controller series., click Wireless Services Modules (WiSM) Software .
- 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. We recommend that you migrate to an upgraded release.
Step 10 If you are using a TFTP server, the default values of 10 retries for the Maximum Retries text field, and 6 seconds for the Timeout text field 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 text box and the amount of time (in seconds) that the TFTP server attempts to download the software in the Timeout text box.
Step 18 After the controller reboots, repeat Click Commands > Download File to open the Download File to Controller page. to Click OK to confirm your decision to reboot the controller. to install the remaining file (either the 188.8.131.52 controller software or the Cisco Unified Wireless Network Controller Boot Software 184.108.40.206 ER.aes file).
Step 24 To verify that the Cisco Unified Wireless Network Controller Boot Software 220.127.116.11 ER.aes file is installed on your controller, enter the show sysinfo command on the controller CLI and look at the Emergency Image Version field.
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. Use the statement number provided at the end of each warning to locate its translation in the translated safety warnings that accompanied this device. Statement 1071
Warning Do not locate the antenna near overhead power lines or other electric light or power circuits, or where it can come into contact with such circuits. When installing the antenna, take extreme care not to come into contact with such circuits, as they may cause serious injury or death. For proper installation and grounding of the antenna, please refer to national and local codes (e.g. U.S.: NFPA 70, National Electrical Code, Article 810, Canada: Canadian Electrical Code, Section 54). Statement 280
Warning This product relies on the building’s installation for short-circuit (overcurrent) protection. Ensure that a fuse or circuit breaker no larger than 120 VAC, 15A U.S. (240 VAC, 10A international) is used on the phase conductors (all current-carrying conductors). Statement 13
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. Statement 1024
Warning Do not work on the system or connect or disconnect any cables (Ethernet, cable, or power) during periods of lightning activity. The possibility of serious physical injury exists if lightning should strike and travel through those cables. In addition, the equipment could be damaged by the higher levels of static electricity present in the atmosphere. Statement 276
Warning This unit is intended for installation in restricted access areas. A restricted access area can be accessed only through the use of a special tool, lock and key, or other means of security. Statement 1017
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.
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.
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.
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!
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.
For operation with Microsoft Windows, the Cisco Windows USB console driver must be installed on any PC connected to the console port. With this driver, you can plug and unplug the USB cable into and from the console port without affecting Windows HyperTerminal operations.
Note Only one console port can be active at a time. When a cable is plugged into the USB console port, the RJ-45 port becomes inactive. Conversely, when the USB cable is removed from the USB port, the RJ-45 port becomes active.
- Microsoft Windows 2000, XP, Vista (Cisco Windows USB console driver required)
- Apple Mac OS X 10.5.2 (no driver required)
- Linux (no driver required)
Note Some systems might also require an additional system file. You can download the Usbser.sys file from this URL:
The USB driver is mapped to COM port 6. Some terminal emulation programs do not recognize a port higher than COM 4. If necessary, change the Cisco USB systems management console COM port to an unused port of COM 4 or lower. To do so, follow these steps:
Upgrading to 18.104.22.168 or 22.214.171.124 Can Disrupt DHCP Service When Using Controller’s Internal DHCP Feature
Upgrading to controller release 126.96.36.199 or 188.8.131.52 can cause client devices to fail to complete DHCP. To work around this problem, use an external DHCP server, such as a router or a Layer-3 switch. This defect is described in CSCth68708, which is visible in the Bug Toolkit on Cisco.com at this URL:
All features included in a Wireless LAN Controller WPlus license are now included in the base license; this change is introduced in release 184.108.40.206. There are no changes to WCS BASE and PLUS licensing.
- If you have a WPlus license and you upgrade from 6.0.18x to 220.127.116.11: Your license file contains both Basic and WPlus license features. You will not see any disruption in feature availability and operation.
- If you have a WPlus license and you downgrade from 18.104.22.168 to 22.214.171.124, 6.0.188 or 6.0.182, the license file in 126.96.36.199 contains both Basic and WPlus license features, so you will not see any disruption in feature availability and operation.
- If you have a base license and you downgrade from 188.8.131.52, 184.108.40.206, 220.127.116.11 or 18.104.22.168, when you downgrade, you lose all WPlus features.
Note Some references to Wireless LAN Controller WPlus licenses remain in WCS and in the controller CLI and GUI in release 22.214.171.124. However, WLC WPlus license features have been included in the Base license, so you can ignore those references.
You can now purchase licenses to support additional access points on 5500 series controllers. The new additive licenses (for 25, 50, or 100 access points) can be upgraded from all license tiers (12, 25, 50, 100, and 250 access points). The additive licenses are supported through both rehosting and RMAs.
One Time Passwords (OTP) are supported on the Wireless Lan Controller (WLC) using TACACS and RADIUS. In this configuration, the controller acts as a transparent passthrough device. The controller forwards all client requests to the TACACS/RADIUS server without inspecting the client behavior. When using OTP, the client must only establish a single connection to the controller to function properly. The controller currently does not have any intelligence or checks to correct a client that is trying to establish multiple connections.
In software releases prior to 6.0, the controller sends uppercase alphabetic characters in the MAC address. In software release 6.0 or later, the controller sends lowercase alphabetic characters in the MAC address for the RADIUS called-station-id and calling-station-id attributes. If you enabled these attributes for 802.1X authentication in previous releases and upgrade to software release 6.0, client authentication fails. Therefore, you must change the MAC addresses to lowercase characters on the RADIUS server before upgrading to software release 6.0.
You can create up to 50 access point groups for 2100 series controllers and controller network modules and up to 300 access point groups for 4400 series controllers, 500 AP Groups on 5500 Series Controllers, and 192 access point groups for the Cisco WiSM, and the 3750G wireless LAN controller switch.
You must disable IP-MAC address binding in order to use an access point in sniffer mode if the access point is joined to a 5500 series controller, a 2100 series controller, or a controller network module running software release 6.0. To disable IP-MAC address binding, enter this command using the controller CLI: config network ip-mac-binding disable .
WLAN 1 must be enabled in order to use an access point in sniffer mode if the access point is joined to a 5500 series controller, a 2100 series controller, or a controller network module running software release 6.0. If WLAN 1 is disabled, the access point cannot send packets.
When controllers in the mobility list are running different software releases (such as 5.0, 5.1, 5.2, and 6.0), Layer 2 or Layer 3 client roaming is not supported between GD to ED. It is supported only between controllers running the same and GD release such as 6.0 and 4.2.
Guest tunneling works only between controllers running the same software release or between controllers running software release 4.2 and controllers running any later software release (for example, 4.2 to 5.0, 4.2 to 5.1, 4.2 to 5.2, or 4.2 to 6.0). Guest tunneling does not work among controllers running other combinations of software.
Rogue Location Discovery Protocol (RLDP) is a controller feature that detects the presence of rogue access points that are connected to your wired network. In this software release, RLDP operates with these limitations:
- RLDP detects rogue access points that are configured for open authentication.
- RLDP detects rogue access points that use a broadcast BSSID (that is, the access point broadcasts its SSID in beacons).
- RLDP detects only rogue access points that are on the same network. In other words, if an access list in the network prevents the sending of RLDP traffic from the rogue access point to the controller, RLDP does not work.
- RLDP does not work on 5-GHz dynamic frequency selection (DFS) channels. However, this works when the managed access point is a monitor mode AP on a DFS channel.
When clients use the controller’s internal DHCP server, IP addresses are not preserved across reboots. As a result, multiple clients can be assigned with the same IP address. To resolve any IP address conflicts, clients must release their existing IP address and request a new one.
When you plug a controller into an AC power source, the bootup script and power-on self-test run to initialize the system. During this time, you can press Esc to display the bootloader Boot Options Menu. The menu options for the 5500 series controllers are different than for other controller platforms.
Enter 1 to run the current software, enter 2 to run the previous software, or enter 4 (on a 5500 series controller) or 5 (on another controller platform) to run the current software and set the controller configuration to factory defaults. Do not choose the other options unless directed to do so.
Cisco 5500 series controllers do not support fragmented pings on any interface. Similarly, Cisco 4400 series controllers, the Cisco WiSM, and the Catalyst 3750G Integrated Wireless LAN Controller Switch do not support fragmented pings on the AP-manager interface.
When a controller is configured to allow only 802.11g traffic, 802.11b client devices are able to successfully associate to an access point but cannot pass traffic. When you configure the controller for 802.11g traffic only, disable any channels (such as channel 14 in Japan) that allow associations from 802.11b client devices.
If you have a firewall or access control list (ACL) between the controller and its access points that allows LWAPP traffic, before upgrading to software release 5.2 or later and CAPWAP, you should allow CAPWAP traffic from the access points to the controller by opening the following destination ports:
The access points use a random UDP source port to reach these destination ports on the controller. In controller software release 5.2, LWAPP was removed and replaced by CAPWAP, but if you have a new out-of-the-box access point, it could try to use LWAPP to contact the controller before downloading the CAPWAP image from the controller. Once the access point downloads the CAPWAP image from the controller, it uses only CAPWAP to communicate with the controller.
Note After 60 seconds of trying to join a controller with CAPWAP, the access point falls back to using LWAPP. If it cannot find a controller using LWAPP within 60 seconds, it tries again to join a controller using CAPWAP. The access point repeats this cycle of switching from CAPWAP to LWAPP and back again every 60 seconds until it joins a controller.
Note An access point with the LWAPP recovery image (an access point converted from autonomous mode or an out-of-the-box access point) uses only LWAPP to try to join a controller before downloading the CAPWAP image from the controller.
Several messages might flood the message logs when the controller boots up. These messages appear because of a failure to read or delete several different configuration files. These are low-severity messages that can safely be ignored. They do not affect controller functionality. These are some examples:Mar 18 16:05:56.753 osapi_file.c:274 OSAPI-5-FILE_DEL_FAILED: Failed to delete the file : sshpmInitParms.cfg. file removal failed.Mar 18 16:05:56.753 osapi_file.c:274 OSAPI-5-FILE_DEL_FAILED: Failed to delete the file : bcastInitParms.cfg. file removal failed.
Note For 5500 series controllers, 2100 series controllers, and controller network modules, you must configure a preauthentication access control list (ACL) on the WLAN for the external web server and then choose this ACL as the WLAN preauthentication ACL under Security Policies > Web Policy on the WLANs > Edit page.
The 1250 series access points may contain a bootloader older than version 12.4(10b)JA. Units with old bootloaders 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. Units with bootloader versions 12.4(10b)JA or later generate a crash log if the access point is associated to a controller running software release 126.96.36.199 or later.
New 1250 series access points shipped from the factory contain new bootloader images, which fix 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 188.8.131.52 or later. Therefore, no user configuration is needed to enable a crash log on new 1250 series access points shipped from the factory.
In controller software release 184.108.40.206 and later, the controller’s bootup configuration file is stored in an Extensible Markup Language (XML) format rather than in binary format. When you upgrade a controller to 220.127.116.11 or a later software release, the binary configuration file is migrated and converted to XML.
Note You cannot download a binary configuration file onto a controller running software release 18.104.22.168. Also, do not attempt to make changes to the configuration file. If you do so and then download the file to a controller, the controller displays a cyclic redundancy checksum (CRC) error while it is rebooting and returns the configuration parameters to their default values.
Note You cannot modify the configuration files for 2000, 4000, and 4100 series controllers. The ability to modify configuration files is available in controller software release 5.2 or later, and these controllers support only earlier software releases (up to the 4.2 release for 2000 series controllers and up to the 3.2 release for 4000 and 4100 series controllers).
If you downgrade from controller software release 22.214.171.124, 126.96.36.199, 188.8.131.52, 184.108.40.206, 220.127.116.11, 18.104.22.168, or 22.214.171.124 to 126.96.36.199 or an earlier release, the LWAPP mode changes from Layer 3 to Layer 2. Access points might not join the controller, and you must manually reset the controller to Layer 3 to resolve this issue.
The dynamic interface gateway fails first and controller receives the GARP for the dynamic interface from the switch and sends it accordingly to the client. After the controller sends out the GARP, the getway for the ap manager fails and this packet is dropped. The solution for this problem is as follows:
- Configure the ap-manager on a lower vlan so that the controller gets the GARP for ap-manager first, and then updates the ARP cache and sends out the GARPs that comes successively for the dynamic interface gateways through the new gateway. This way the GARPs do not get dropped and the clients does not disconnect.
- Stack-mac persistent timer 0 command on stack SW. If it is set to 0, mac address of stack SW is never changed to another one, so that the controller need not update the ARP table.
Access points running recent Cisco IOS versions transmit multicast frames at the highest configured basic rate and management frames at lowest basic mandatory rates, which can cause reliability problems. Access points running LWAPP or autonomous Cisco IOS should transmit multicast and management frames at the lowest configured basic rate. Such behavior is necessary to provide good coverage at the cell’s edge, especially for unacknowledged multicast transmissions where multicast wireless transmissions may fail to be received.
Because multicast frames are not retransmitted at the MAC layer, clients at the edge of the cell may fail to receive them successfully. If reliable reception is a goal, then multicast frames should be transmitted at a low data rate. If support for high data rate multicast frames is required, then it may be useful to shrink the cell size and disable all lower data rates.
- If you need to transmit multicast data with the greatest reliability and if there is no need for great multicast bandwidth, then configure a single basic rate, one that is low enough to reach the edges of the wireless cells.
- If you need to transmit multicast data at a certain data rate in order to achieve a certain throughput, then configure that rate as the highest basic rate. You can also set a lower basic rate for coverage of nonmulticast clients.
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.
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.
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.
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.
The multicast queue depth is 512 packets on all controller platforms. However, the following message might appear on 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 while all forwarding (multicast or otherwise) and multicast replication are done in the software on the 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.
Controller software release 188.8.131.52 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.
In controller software release 184.108.40.206 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. We recommend that you use either dynamic WEP without CKIP (which is less secure) or WPA/WPA2 with TKIP or AES (which are more secure).
Cisco Aironet lightweight access points do not connect to the 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.
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, we highly recommend 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 7.0, for instructions for setting the time and date on the controller.
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 220.127.116.11 software release or later can use channels 100 through 140 in the UNII-2 band.
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)
We recommend 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.
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:
- WS-C3550, WS-C3560, WS-C3750
- 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.
Rate-limiting is applicable to all traffic destined to the CPU from either direction (wireless or wired). We recommend 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, we recommend that you reapply the config advanced rate enable command after testing is complete.
Controller software release 18.104.22.168 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 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.
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.
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.
It is not possible to enable or disable band selection and client load balancing globally through the controller GUI or CLI. You can, however, enable or disable band selection and client load balancing for a particular WLAN. Band selection and client load balancing is enabled globally by default.
Cisco IOS Lightweight Access Point Protocol (LWAPP) access points have a default password of Cisco, and the prestage 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:
- 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.
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.
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.
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.
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 7.0, for configuration instructions.
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 7.0, for configuration instructions.
The controller does not support transmitting jumbo frames. To avoid having the WLC transmit CAPWAP packets to the AP that necessitates fragmentation and reassembly, reduces the MTU/MSS on the client side. For example, the TCP MSS Adjust feature can be leveraged here.
Note For 5500 series controllers, you are not required to configure an AP-manager interface. The management interface acts like an AP-manager interface by default, and the access points can join on this interface.
- Asymmetric mobility tunneling
- Spanning Tree Protocol (STP)
- Port mirroring
- Layer 2 access control list (ACL) support
- VPN termination (such as IPsec and L2TP)
- VPN passthrough option
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.
The 2106 controller image is supported for use with only 2100 series controllers. Do not install the 2106 image on a 3504 controller. Otherwise, errors may occur. Install only the 3504 image on a 3504 controller.
1. For 5500 series controllers, 2100 series controllers, and controller network modules, you must configure a preauthentication access control list (ACL) on the WLAN for the external web server and then choose this ACL as the WLAN preauthentication ACL under Security Policies > Web Policy on the WLANs > Edit page.
<meta http-equiv="Pragma" content="no-cache"> <meta HTTP-EQUIV=”Content-Type” CONTENT="text/html; charset=iso-8859-1"> <title>Web Authentication</title> <script>alert("You are not configured to authenticate against web portal. No further action is required on your part.");alert("The username specified cannot be used at this time. Perhaps the user is already logged into the system?");<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"><tr align="center"> <td colspan="2"><font size="10" color="#336699">Web Authentication</font></td></tr><td colspan="2"> User Name <input type="TEXT" name="username" SIZE="25" MAXLENGTH="63" VALUE=""> </td> </tr> <tr align="center" > <td colspan="2"> Password <input type="Password" name="password" SIZE="25" MAXLENGTH="24"> </td> </tr><td colspan="2"><input type="button" name="Submit" value="Submit" class="button" onclick="submitAction();"> </td> </tr> </table> </div>
When the port status on the controller changes, the switch status does not get changed. This is a known issue. For example, when the controller port goes down, the switch port is still in administrable state. This has been resolved in Cisco 5500 Series Controllers.
By default, Aggregated MAC Protocol Data Unit (A-MPDU) is enabled for priority level 0, 4 and 5 and the rest are disabled. In releases prior to 6.0 release, only priority 0 was enabled by default. The video performance is enhanced when priorities 4 and 5 are enabled for A-MPDU aggregation.
This feature enables you to configure a set of channels available to be assigned for the serial backhaul RAPs/MAPs. Normally, channels are selected by the user for RAPs, and the MAPs automatically tune to RAP channels (for AP1522 and AP1522PS) or select channels automatically (AP1524SB and AP1523CV). With the 22.214.171.124 release, there is a connect between the DCA list and serial backhaul mesh access points, only if someone uses (enables) this feature.
From software release 126.96.36.199 release or later releases, new 1524 SKUs are released, with both 802.11a radio units that supports an entire 5-GHz band from 4.9-GHz to 5-GHz and radios can operate in UNII-2 (5.25 - 5.35-GHz), UNII-2 plus (5.47 - 5.725-GHz), and upper ISM (5.725 - 5.850-GHz) bands.
With the expansion of the channel set, DFS-enabled channels, radar detection, and automatic channel reassignment in case of radar detection on RAP/MAPs are also supported. When there is a channel change, the change is propagated to the corresponding parent/child access point (if applicable) so that the change is synchronized between the parent and child and there is no link downtime. For example, if radar is detected on the uplink radio of a child access point, the parent is informed so that it can change the channel of the downlink radio. The parent informs the child about the channel change, so that the child access point can set the new channel on its uplink radio and does not have to scan again to rejoin the parent on the new channel.
The serial backhaul access point consists of three radio slots. Radios in slot 0 operate in a 2.4-GHz band and are used for client access. The downlink and uplink radios operate in a 5-GHz band and are primarily used for backhaul. With the Universal Client Access feature, client access is allowed over slot 1 radios with the extended universal client access feature and client access is also allowed over slot 2 radios.
This feature enables you to execute commands to the cable modem from the privileged mode of the CLI. This command takes a text string and sends it to the cable modem UART interface. The Cable modem interprets the text string as one of its own CLI commands. The response is captured and displayed to the IOS console. Up to 9600 characters are displayed from the cable modem. Any text beyond the 9600 characters is truncated. The modem CLI commands can be used on Mesh APs that have devices connected to the UART port.
A Workgroup Bridge (WGB) is a small standalone unit that can provide a wireless infrastructure connection for Ethernet-enabled devices. Devices that do not have a wireless client adapter to connect to the wireless network can be connected to the WGB through the Ethernet port. The WGB is associated with the root AP through the wireless interface. Thus, wired clients get access to the wireless network.
In the current architecture, while an autonomous AP functions as a workgroup bridge, only one radio interface is used for controller connectivity, an Ethernet interface is used for wired client connectivity, and another radio interface is used for wireless client connectivity. In a practical scenario, dot11radio 1 (5 GHz) can be used to connect to the controller (using a mesh infrastructure), an Ethernet interface can be used for wired clients, and dot11radio 0 (2.4 GHz) can be used for wireless client connectivity. This scenario can improve the serviceability of a workgroup bridge without any extra cost. Depending on your network requirements, dot11radio 1 or dot11radio 0 can be used for client association or controller connectivity.
With the 188.8.131.52 release, the wireless clients on the second radio of the WGB are not dissociated by the WGB when it loses its uplink to a wireless infrastructure or in a roaming scenario. Access points with two radios certainly gives better advantage because one radio can be used for client access and the other radio can be used for accessing the access points. Also, wireless clients on the second radio do not get disassociated by the WGB when it loses its uplink or in a roaming scenario. In this scenario, you must configure one radio as Root (radio role) and the second radio as WGB (radio role). All wireless clients connecting to the radio with role Root will belong to the same WLAN and the same VLAN which the WGB joins on the radio configured as role WGB.
This feature provides a way for the Administrator to have wired clients behind a WGB in different VLANS. This feature also provides the QoS support to prioritize packets from WGB wired clients in the Mesh Backhaul based on DSCP/dot1p values, when a WGB is associated to a Mesh Access Point. Multicast support is provided for WGB wired VLAN clients by implementing IGMP Snooping in the Workgroup-Bridge. For using this feature, the WGB must use a release later than 12.4(21a)JA1, which has support for VLAN separation. This feature does not support downstream broadcasting of per-VLAN. However, you can replicate broadcast packets to all VLANS behind the Workgroup-bridge using the CLI.
Note Dynamic interfaces should be configured on the Controllers for all the VLANs configured in the WGB and the switch connecting the WGB. Layer-2 multicast is not supported for WGB Ethernet clients. The same native VLAN should be configured in the Controller, Workgroup-Bridge, and the switch connecting the Workgroup-Bridge.
- Multi-country support
- Load-based CAC (Mesh networks support only bandwidth-based, or static, CAC)
- High availability (fast heartbeat and primary discovery join timer)
- EAP-FASTv1 and 802.1X authentication
- Access point join priority (Mesh access points have a fixed priority.)
- Locally significant certificate
- Location-based services
The following sections lists Open Caveats and Resolved Caveats for Cisco controllers and lightweight access points for version 184.108.40.206. For your convenience in locating caveats in Cisco’s Bug Toolkit, the caveat titles listed in this section are drawn directly from the Bug Toolkit database. These caveat titles are not intended to be read as complete sentences because the title field length is limited. In the caveat titles, some truncation of wording or punctuation might be necessary to provide the most complete and concise description. The only modifications made to these titles are as follows:
- Commands are in boldface type.
- Product names and acronyms may be standardized.
- Spelling errors and typos may be corrected.
Note If you are a registered cisco.com user, view Bug Toolkit on cisco.com at the following website:
To become a registered cisco.com user, go to the following website:
Table 6 lists open caveats in controller software release 220.127.116.11.
Table 7 lists caveats resolved in controller software release 18.104.22.168.
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:
- The quick start guide or installation 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
For information on obtaining documentation, submitting a service request, and gathering additional information, see the monthly What’s New in Cisco Product Documentation , which also lists all new and revised Cisco technical documentation, at:
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