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.
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 recommends 22.214.171.124.
Customers with 1700/2700/3700 access points should run 126.96.36.199, or latest 8.2/8.3, due to CSCus83638 (AP 5Ghz Radio Beaconing but not accepting Client Assoc.)
188.8.131.52 is the final maintenance release of AireOS 8.1, and is deferred. The recommended upgrade path for AireOS 8.1 customers is to 8.2.
For deployments that require new features or hardware, introduced after 8.0, TAC recommends 184.108.40.206.
For deployments that require support for new features or hardware, introduced after 8.2, TAC recommends 220.127.116.11. TAC does not recommend any prior 8.3 MR3 release (18.104.22.168, 22.214.171.124 or 126.96.36.199) due to the WLC crash bug CSCvf87731.
8.3 customers with large numbers of AP, where the WAN connectivity between APs and WLC is unstable, should be aware of CSCvf76274, and contact TAC for an 8.3 MR3 Escalation fix.
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 require support for new features and hardware, introduced after 8.3, AireOS 188.8.131.52 is a BU and TAC supported release but should be avoided, unless running Mobility Express, for the following reasons: