We are using a Cisco 5520 Wireless Controller with software version 8.3.131.0. But the problem also occured with the former 8.1.102.0 software version.
All APs are running in FlexConnect Mode. Moreover we assign an "External WebAuthentication ACL" to every AP. This can be done via GUI (enter AP details --> FlexConnect --> PreAuthentication Access Control Lists --> External WebAuthentication ACLs --> Policies --> Add Policy ACL) or via CLI (config ap flexconnect policy acl add <ALCNAME> <APNAME>).
Basically this setup is running very fine. But there can be problems if an APs gets restarted or the WAN connection to the AP is down. After the AP reconnects to the WLC sometimes the ACL assignment is gone. All other settings are not affected. This behaviour is very random and can not be manually triggered. Furthermore we have several different AP models running (1702, 2702, 2802, 1832, 1532) and the problem could occor on every model.
Did someone notice similar problems or can someone explain why this happens?
