Cisco | 2500 Series Wireless Controller Firmware Update |top|

> show ap summary > show ap join stats summary

⚠️ As of 2026, the 2500 series is fully End-of-Life (EoL). No further updates are available from Cisco. It is strongly advised to migrate to 9800 series or Catalyst 9100 APs with embedded controllers. cisco 2500 series wireless controller firmware update

The AP image in the new firmware is different. The WLC will push the new image to APs one by one. Solution: Pre-download the AP image before the primary update. > show ap summary > show ap join

(WLC)> transfer download datatype code (WLC)> transfer download mode tftp (WLC)> transfer download serverip 10.10.10.5 (WLC)> transfer download path /tftp/ (WLC)> transfer download filename AIR-CT2500-K9-8-5-182-0.aes (WLC)> transfer download start show ap summary &gt

: The most common method, involving a web-based upload of the firmware file.