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 18.104.22.168 (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 22.214.171.124 (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 126.96.36.199.
Customers with 1700/2700/3700 access points should run 188.8.131.52, or latest 8.2/8.3, due to CSCus83638 (AP 5Ghz Radio Beaconing but not accepting Client Assoc.)
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 release.
For deployments that require support for new features or hardware, introduced after 8.2, TAC recommends the 18.104.22.168 release, except in the FlexConnect 802.1X+NAC scenario noted below.
AireOS 8.4 is a short lived release with no maintenance planned. 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 22.214.171.124 is a 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 8.2 or 8.3.
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 126.96.36.199, 188.8.131.52 and 184.108.40.206. It is fixed in 220.127.116.11.
if using 802.1X with ISE NAC, bug CSCvf52723 is a regression that impacts 18.104.22.168, 8.3.12x.0, 22.214.171.124 and 126.96.36.199. It is fixed in 188.8.131.52 and 184.108.40.206; for a fix in later trains, contact TAC.