This is non-negotiable. If the flash becomes corrupted, you will need to restore.
Later updates improved the ability to classify and prioritize over 1,000 different applications directly from the WLC. cisco 2500 series wireless controller firmware update
(Cisco Controller) > show boot
(If you'd like related search suggestions for firmware downloads, release notes, or AP compatibility, I can provide terms.) This is non-negotiable
> show running-config > show wlan summary > show advanced 802.11a summary > show advanced 802.11b summary or AP compatibility
> config boot primary 1