Sep 18 11:50:02.512: *spamReceiveTask: 1 wcm: %LWAPP-3-AP_LICENSE_REQUEST_ERR: License request failed for AP 1c:de:a7:3f:6b:30 - AP License Request timedout, ensure MC link is up, Resettting AP CISCO-SW3850-2# *Sep 18 11:50:05.487: *spamApTask0: 1 wcm: %CAPWAP-3-INVALID_STATE_EVENT: Invalid AP event (CAPWAP Message Timer Expiry) and state (CAPWAP Join Response) combination
: 1 wcm: %LWAPP-3-AP_LICENSE_REQUEST_ERR: License request failed for AP 1c:de:a7:3f:6b:30 - AP License Request timedout
It seems to be AP cannot get an licence from MC to register it. Where AP get connected ? Are those connected to 3850-2 (MC switch as config shown ). If it is the case make sure it has licence on it using "show license right-to-use summary "
Below post should help you for basic troubleshooting & get this going
Transferring Crash file from standby: Login to the Active WLC in HA.
From CLI: (Cisco Controller) >transfer upload datatype crash (Cisco
Controller) >transfer upload filename (Cisco
Controller) >transfer upload mode tftp (Cisco Controller) >transfer
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