: Support for high-density environments and multi-user MIMO (MU-MIMO).
: Essential for the AP to join and receive configurations from the WLC.
: The file format. This is a compressed archive containing the actual firmware, recovery images, and support files needed for the upgrade. Key Features of the 15.3(3)JPO Release
: If you do not have a service contract but need this firmware to fix a known security vulnerability, Cisco often provides free updates via their TAC (Technical Assistance Center) .
If you are troubleshooting an AP that won't join a controller, you may need to manually apply this image via the console using a .