This document helps customers to find the most reliable Wireless LAN Controller software available. The Cisco Wireless TAC (Technical Assistance Center) recommends AireOS builds from each train of released AireOS software. These recommendations may be updated on a weekly basis.
Escalation Builds/Maintenance Interims
In some cases, the TAC recommended build might be an escalation or maintenance interim/beta build. Such builds are not available on CCO (Cisco.com), but have important bug fixes (beyond what is available in CCO code), and will be operational in production at customer sites for several weeks.
Note that, in some cases, the beta/escalation/interim build will contain support for unreleased features and/or hardware. TAC does not support unreleased features or hardware - until official release, such support will come from the Business Unit (BU).
For released features and platforms, these builds are fully supported by TAC and the BU.
In order to request a TAC recommended escalation/maintenance interim build, open a Cisco TAC case on your Wireless LAN Controller contract.
Caution: If you are planning to upgrade AireOS WLC from an older code train to a recommended release and have IOS APs in your deployment, please take a look at Field Notice FN70330prior to performing the upgrade.
TAC Recommended Builds
AireOS 188.8.131.52 is a TAC supported release. The C9115AX/C9117AX require 8.9; customers who do not have these access points should use 8.8 or earlier.
AireOS 184.108.40.206, 220.127.116.11 and 18.104.22.168 are TAC supported releases. 22.214.171.124 or above is required for Inter-Release Controller Mobility (IRCM) compatibility with Cisco 9800 controllers. Customers who do not require post-8.5 feature or hardware support should run 8.5.
Note: 126.96.36.199 is missing several bugfixes that were in 188.8.131.52, and so should not be used for large AP702 deployments (as it's missing the CSCvm18273 memory fix) nor for IRCM with 9800s (as it's missing the CSCvn47033 fix.)
AireOS 184.108.40.206 is a short-lived release with no maintenance planned - see the End of Life bulletin. Customers who require new features that are unavailable in 8.5 will need to run 8.7 or 8.8.
AireOS 220.127.116.11 is a short-lived release with no maintenance planned, and is deferred. Customers who require new features that are unavailable in 8.5 will need to run 8.7 or 8.8.
TAC recommends AireOS 18.104.22.168. Customers who do not require any post-8.5 features or hardware should stay with the 8.5 train.
If Cisco 9800 controller compatibility with AireOS 8.5 is required, contact TAC for an "8.5MR4 IRCM" special image for 5508/8510/5520/8540/3504, or send mail to email@example.com.
AireOS 8.4 is a short-lived release with no maintenance planned, and is deferred. Any deployment that requires post-8.3 features or hardware should run 8.5 instead.
For deployments that include hardware that is end of lifed in 8.3, TAC recommends 22.214.171.124 or 8.3 MR4 Escalation code (available now from TAC.) The following platforms are EOLed in 8.3: AP1040, AP1140, AP1260, AP1552 (64MB version), OEAP600.
126.96.36.199 and 8.3 MR Escalation code both include fixes for the following widely encountered bugs, beyond the 188.8.131.52 CCO release:
184.108.40.206 and 220.127.116.11 are susceptible to the AID Errors problem (CSCve81314 (local mode APs) and CSCve81269 (FlexConnect APs)). This is fixed in 8.0MR5esc, available from TAC. See the Field Notice for more details.
For Mobility Express deployments, TAC recommends using the 18.104.22.168 or 22.214.171.124 release.
Note on AP702 Issues
TAC recommends that large scale deployments of AP702s run 126.96.36.199 or 8.2MR7 Escalation (available from TAC), rather than 8.3. 8.5 deployments should run 8.5MR5 Interim. Track the following bugs for an AP702 solution after 188.8.131.52: CSCvn49888, CSCvn56211.