If your APs fail to join after an upgrade due to expired certificates, run the following commands on the controller: config ap cert-expiry-ignore ssc enable config ap cert-expiry-ignore mic enable 3. Back Up Configuration
Before starting the update, verify these critical items to prevent network downtime or hardware failure:
Once the FUS is complete, upgrade the main operating system.
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. cisco 2500 series wireless controller firmware update
Download the target deployment software file (typically carries an .aes extension, such as AIR-CT2500-K9-8-5-182-0.aes ).
for your target version. You may need to install an intermediate release if jumping from a very old version (e.g., 7.x to 8.x). Field Upgrade Software (FUS) : For some versions, updating the Field Upgrade Software (FUS)
show sysinfo | include Version
The reset process will erase the old OS from flash and write the new one. This takes 8-12 minutes. Do not power cycle physically during this period.
If you are planning an upgrade, it is strongly advised to review the specific Cisco 2500 Series Documentation for your current firmware version. Solved: wlc 2500 series software update - Cisco Community
show ap summary
(If you'd like related search suggestions for firmware downloads, release notes, or AP compatibility, I can provide terms.)
To reduce downtime, ensure you use the pre-download option, which allows the APs to download the new image while still running on the old image 1.2.3.