DHCP option 43 would be enabled on the DHCP server. It is used to tell the APs the IP address of the WLC. Leo asked about it because the message you put there is referring to this. It only means that it could not discover the WLC's IP address through...
AAA is authentication, accounting, and authorization. When doing local mac auth the WLC is acting as a AAA server doing all three of these functions. AAA override is saying that based on the authorization the AAA server is allowed to override the cur...