This document describes the way in which the customers can 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.
Contributed by Aaron Leonard, Cisco TAC Engineer.
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
TAC recommends 220.127.116.11 (latest CCO release). No further 7.0 releases are planned. The recommended migration path is to AireOS 8.0, if the hardware supports it.
TAC recommends 18.104.22.168 (latest CCO release). No further 7.4 releases are planned. The recommended migration path is to AireOS 8.0.
TAC does not recommend any 7.6 CCO release, and Cisco does not plan to release any more 7.6 maintenance releases on CCO. The recommended upgrade path for AireOS 7.6 customers is to 8.0.
For AireOS 8.0 customers, TAC supports 22.214.171.124. No further 8.0 releases are planned for CCO.
126.96.36.199 and 188.8.131.52 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.
184.108.40.206 is the final maintenance release of AireOS 8.1, and is deferred. The recommended upgrade path for AireOS 8.1 customers is to 8.3 or, if feasible, 8.5.
For deployments that require features or hardware introduced after 8.0, TAC supports 220.127.116.11. 18.104.22.168 is compliant with the mandatory ETSI regulatory update. No further 8.2 releases are planned.
For deployments that include hardware that is end of lifed in 8.3, TAC recommends 8.3MR4 Escalation code (available now from TAC.) The following platforms are EOLed in 8.3: AP1040, AP1140, AP1260, AP1552 (64MB version), OEAP600.
8.3MR4 Escalation includes fixes for the following widely encountered bugs, beyond the 22.214.171.124 CCO release:
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.
TAC recommends AireOS 126.96.36.199. Customers who do not require any post-8.5 features or hardware should stay with the 8.5 train.
8.2, not 8.5 is recommended for large deployments of 702 series access points. If you must use 8.5 with AP702s, use 188.8.131.52.
If Cisco 9800 controller compatibility with AireOS 8.5 is required, contact TAC for an "8.5MR4 IRCM" image, or send mail to firstname.lastname@example.org.
AireOS 184.108.40.206 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.
AireOS 220.127.116.11 is a short-lived release with no maintenance planned. Customers who require new features that are unavailable in 8.5 will need to run 8.7 or 8.8.
AireOS 18.104.22.168 and 22.214.171.124 are BU and TAC supported releases. 126.96.36.199 or above is required for Inter-Release Controller Mobility compatibility with Cisco 9800 controllers.
For Mobility Express deployments, TAC recommends using the 188.8.131.52 or 184.108.40.206 release.
Note on AP702 Issues
TAC recommends that large scale deployments of AP702s run 220.127.116.11 or 8.2MR7 Escalation (available from TAC), rather than 8.3 or above. 8.5 deployments should run 18.104.22.168 or above. Track the following bugs for an AP702 solution after 22.214.171.124: CSCvn49888, CSCvn56211.