How are Mobilty Messages exchanged between WLCs?
A. In versions earlier than 5.0 , WLCs sends Mobility Messages with unicast mode, where the copies of Mobility Messages are unicast to all the WLCs in the Mobility Group. But in version 5.0 , Mobility Messages can be sent as Multicast messages wherein only one copy of the Mobility Message is sent to reach all the WLCs in the Mobility Group. Refer to the Messaging among Mobility Groups section of Cisco Wireless LAN Controller Configuration Guide, Release 5.0 for more information.