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.
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 126.96.36.199 (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 188.8.131.52 (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.
184.108.40.206 is the final maintenance release of AireOS 8.1. 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 the 220.127.116.11 or 18.104.22.168 releases. 22.214.171.124 adds about 170 fixes, but should be avoided if using the FlexConnect 802.1X+NAC scenario noted below.
For deployments that require support for new features or hardware, introduced after 8.2, TAC recommends the 126.96.36.199 release, except in the FlexConnect 802.1X+NAC scenario noted below.
AireOS 8.4 and 8.5
For deployments that require support for new features and hardware, introduced after 8.3, AireOS 188.8.131.52 and 184.108.40.206 are BU and TAC supported releases, but should be avoided when using FlexConnect local switching in the scenarios noted below. TAC recommends that customers who do not require 8.4/8.5 features use the latest 8.2 or 8.3 build.
Note on FlexConnect with special security scenarios
Deployments with IOS APs using FlexConnect local switching should be aware of the following:
if using Webauth on MAC filter failure, on a WLAN with L2 security, bug CSCve77722 is a regression that impacts 220.127.116.11, 18.104.22.168 and 22.214.171.124. It is fixed in 126.96.36.199.
if using 802.1X with ISE NAC, bug CSCvf52723 is a regression that impacts 188.8.131.52, 184.108.40.206 (and above), 220.127.116.11 and 18.104.22.168.