Ensure all APs in your Instant cluster are compatible with the new firmware.
If you have an AP-225 (not IAP), you must use a console cable to convert it using the apboot prompt and proginv commands. aruba iap 225 firmware download
If you prefer the Command Line Interface, you can use a TFTP server. Ensure all APs in your Instant cluster are
Let me know if you need any further assistance! aruba iap 225 firmware download