I'm having trouble joining my APs to the controller. I have so far got most of them joined eventually, but i seem to get a random issue with lots of the APs. I have tried all the usual things - changed network leads, power supply, different port etc.. This issue doesn't always stop them joining because sometimes after an hour of errors they join and are fine after that.
The main errors are
*Sep 4 14:07:36.687: %CAPWAP-3-ERRORLOG: Failed to handle capwap control message from controller
*Sep 4 14:07:36.687: %CAPWAP-3-ERRORLOG: Failed to process unencrypted capwap packet from 220.127.116.11
*Sep 4 14:07:36.687: %CAPWAP-3-ERRORLOG: Invalid AC Message Type 34078720.
I've attached the debug