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
TAC recommends AireOS 220.127.116.11. In general, TAC recommends that customers with 802.11ax (Catalyst 9100 Series Wi-Fi 6) access points run the latest available 8.10 release.
AireOS 18.104.22.168 and 22.214.171.124 are deferred. The 802.11ax APs require 8.9 or above; TAC recommends the latest available 8.10 release for deployments with these APs.
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 should run 8.10.
AireOS 188.8.131.52 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 8.10.
AireOS 8.5 is a long lived train. It's the last train for the following platforms: AP1600, AP2600, AP3500, AP3600, AP1552 (128MB version), AP802, WLC2504, WLC5508, WLC7510, WLC8510, WiSM2. See the Product Bulletin for 8.5 End of Life plans. AireOS 8.5 has two branches:
The 8.5 Mainline branch supports 5508/8510/5520/8540/3504/2504/7510/WiSM2/vWLC controllers. It supports intercontroller mobility (IRCM) between AireOS and old "New Mobility" ("Converged Access") controllers (5760/3850/3650.) It does not support IRCM with 9800 controllers. For 8.5 Mainline deployments, TAC recommends 184.108.40.206.
The 8.5 IRCM branch supports only 5508/8510/5520/8540/3504 controllers. It supports IRCM between AireOS and 9800 controllers; it does not support IRCM with old "New Mobility" controllers. For 8.5 IRCM deployments, TAC recommends 220.127.116.11; earlier 8.5 IRCM releases were 18.104.22.168 and 22.214.171.124.
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.
TAC supports 126.96.36.199 and 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. 188.8.131.52 is the final CCO release of 8.3 - see the End of Life bulletin.
AireOS 8.3.150.x Escalation
For 8.3 deployments with AP-COS, TAC recommends 8.3.150.x Escalation (available upon request.)
8.3.150.x Escalation has all of 184.108.40.206's bugfixes, as well as several key bugfixes which are not present in 220.127.116.11, including the following:
AP-COS: AP not joining after enabling MIC certificate expiry check (CSCvb93909)
AP generating 'hostapd' core files, does not respond to EAPOL (CSCvi42632)
Cisco 1810W AP stops to send data frame intermittently (CSCvg91770)
Cisco 3800 AP FW stopped working on Radio 0 (CSCvh54235)
Cisco 2800,3800,1560 AP cannot forward packets downstream; 'Failed to get ARP entry for WLC' (CSCvg44450)
For deployments that require features or hardware introduced after 8.0, TAC supports 18.104.22.168. No further 8.2 releases are planned.
22.214.171.124 is the final maintenance release of AireOS 8.1, and is deferred. The recommended upgrade path for AireOS 8.1 customers is to 8.3 or, if feasible, 8.5.
For AireOS 8.0 customers, TAC supports 126.96.36.199. No further 8.0 releases are planned.
188.8.131.52 and 184.108.40.206 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 8.10 release.
Always refer to the SDA Compatibility Matrix for code combination recommendations that work best for SDA. It lists specific combinations of code on Cisco DNA Center, the Identity Service Engine (ISE), switches, routers and Wireless LAN Controller codes that have been tested by the SDA Solution Test team at Cisco.