I'm planning to upgrade a 4404 WLC with 75 LWAPP's, from 5.1 to 5.2.193.
I read that after the WLC upgrade the AP's are automatically upgraded in groups of 10 and that the upgrade can last as long as 30 minutes. Does this mean some AP's are not functional for 30 minutes? Or do the AP's work while they still have the lower software version, and only are not functional during their own upgrade of about 3 minutes? And is there a way to choose these AP groups yourself? I can't find this in the documentation.
Thanks in advance,