This document helps customers to 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
AireOS 220.127.116.11 and 18.104.22.168 are TAC supported releases. The C9115AX/C9117AX/C9120AXI require 8.9; customers who do not have these access points should use 8.8 or earlier.
For customers who require features or hardware (such as the AP4800 series) that are not supported in 8.5, TAC recommends 22.214.171.124, which also supports Inter-Release Controller Mobility (IRCM) compatibility with Cisco 9800 controllers.
AireOS 126.96.36.199 is a short-lived release with no maintenance planned - see the End of Life bulletin. Customers who require new features that are unavailable in 8.5 will need to run 8.7 or above.
AireOS 188.8.131.52 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 above.
TAC recommends AireOS 184.108.40.206. Customers who do not require any post-8.5 features or hardware should stay with the 8.5 train. 8.5 is the last train for the following platforms: AP1600, AP2600, AP3500, AP3600, AP1552 (128MB version), AP802, WLC2504, WLC5508, WLC7510, WLC8510, WiSM2.
If Cisco 9800 controller compatibility with AireOS 8.5 is required, contact TAC for an "8.5 IRCM" special image for 5508/8510/5520/8540/3504, or send mail to firstname.lastname@example.org.
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 include hardware that is end of lifed in 8.3, TAC recommends 220.127.116.11 or 8.3.150.x Escalation code (available now from TAC.) 8.3 is the last train for the following platforms: AP1040, AP1140, AP1260, AP1552 (64MB version), OEAP600.
18.104.22.168 and 8.3.150.x Escalation code both include fixes for the following widely encountered bugs, beyond the 22.214.171.124 CCO release:
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.
For Mobility Express deployments, TAC recommends using the latest 8.5 or 8.8 release.
Note on AP702 Issues
TAC recommends that large scale deployments of AP702s run 184.108.40.206 or 8.2MR7 Escalation (available from TAC), rather than 8.3. 8.5 deployments should run 220.127.116.11.