Look for errors like "FIPS mode mismatch" or "Certificate validation failed."
: Verify that your current Access Point models are supported by the target firmware version.
Place the file in the root or designated directory of your TFTP/SFTP server. 3. Step-by-Step Upgrade Procedure
Connect to the WLC via SSH or Console and enter the following sequence:
You cannot always go from 7.0 directly to 8.10. Check the Cisco Release Notes for your specific target version to see the mandatory intermediate versions. Backup Configuration: Navigate to Commands > Upload File . Select Config as the File Type. Use TFTP/FTP to back up the current configuration.
For AireOS 8.x and higher, you may need to upgrade the FUS to version 1.9 or 2.0 first to support new features and hardware fixes.
During this period, the AP LEDs will blink rapidly, and they will reboot individually.
The reboot process typically takes 5 to 10 minutes as the system initializes the new code and pushes updates to connected Access Points (APs).