This is my first wlc upgrade. I have 2 4402s with 12 AP1242s lwaps split between the two controllers. What's the best practice in upgrading the wireless lan controllers? Should I power one controller off while I upgrade the other or keep them both on during the upgrade process?
Thanks in advance.
I don't think it really matters if either 1 or both are on for the upgrade. Cisco do recommend that all radio's be disabled before the upgrade....so that is a scheduled wireless outage! I suggest you read the below guide for this:-