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 22.214.171.124 and 126.96.36.199 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 11ax AP deployments, TAC does not recommend using CCO code; instead, customers should run 8.9 MR1 escalation software, available now from TAC.
For customers who require features or hardware (such as the AP4800 series) that are not supported in 8.5, TAC recommends 188.8.131.52, which also supports Inter-Release Controller Mobility (IRCM) compatibility with Cisco 9800 controllers.
AireOS 184.108.40.206 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 should run 8.8 or above.
AireOS 220.127.116.11 is a short-lived release with no maintenance planned, and is deferred - see the End of Life bulletin. Customers who require new features that are unavailable in 8.5 should run 8.8 or above.
TAC recommends AireOS 18.104.22.168. 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 22.214.171.124 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.
126.96.36.199 and 8.3.150.x Escalation code both include fixes for the following widely encountered bugs, beyond the 188.8.131.52 CCO release:
184.108.40.206 and 220.127.116.11 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 18.104.22.168 or 8.2MR7 Escalation (available from TAC), rather than 8.3. 8.5 deployments should run 22.214.171.124.