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 AP's in your deployment, please take a look at this article prior to performing the upgrade
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, and is deferred. The recommended upgrade path for AireOS 8.1 customers is to 8.2.
For deployments that require features or hardware introduced after 8.0, TAC recommends 8.2MR7 Interim, due to CSCve57121, which causes intermittent traffic loss with AP-COS, and the SNMP TxPowerlevel regression. Note: if you have AP-COS APs and are using TKIP, open a TAC case in order to get a fix for CSCve66630.
For deployments requiring features or hardware introduced after 8.2, TAC recommends 220.127.116.11. Specifically, 18.104.22.168 fixes the following catastrophic regressions which affect 22.214.171.124:
CSCvi11287 2800 AP consistently rebooting around 1 second after joining
CSCvi14641 AP2802/3802 can't connect with 100Mbps LAN speed
TAC does not recommend any public 8.3.13x.0 CCO release, due to the catastrophic bug CSCvf76274, which prevents APs from joining.
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, such as Assurance, and that do not have AP2802s, TAC recommends AireOS 126.96.36.199 or 8.5MR3 interim. Customers who have AP2802s or AP1562s or SDA Wireless should use 8.5MR3 interim.
AireOS 188.8.131.52 is a BU and TAC supported release. Customers who require new features that are unavailable in 8.5 will need to run this release.
AireOS 184.108.40.206 is a BU and TAC supported release. Customers who require new features that are unavailable in 8.6 will need to run this release.
For Mobility Express deployments, TAC recommends using the 220.127.116.11 release, for improved usability and stability. Mobility Express customers with AP2802s should open a TAC case to get a fix for CSCvi11287.
Note on SNMP TxPowerlevel regression bug
Deployments using SNMP/PI should be aware of the following regression:
CSCve70752 snmp issue: Txpowerlevel returns null causing PI WLC sync to not update AP information
This regression affects 8.2.16x.0, 8.3.12x.0 and above, 8.4 and above. It is fixed in: