Hi, After upgrade Cisco 5520 WLAN controller from 8.5.151.0 to 8.10.151.0, all Cisco 2802 APs couldn't join controller, however Cisco 2702 AP joins.
By looking into AP console, it says 'No valid AP manager found for controller'
It seems AP downloaded 8.10.151.0 code, but couldn't join controller
- Tried to factory reset AP hardware, no luck.
- Management interface has AP manager tick.
- NTP looks good
- Both WLAN controller and AP are in same broadcast domain
Does anyone have any advice?
