A mobility agent is a function to manage a wireless client database that includes client association or authentication status. Each Cisco Catalyst 3850 switch stack produces one mobility agent that can manage up to 50 access points and up to 2000 wireless clients. The mobility agent is also responsible for providing access point connectivity and CAPWAP termination.
Mobility roaming, in which a wireless client moves from one physical location to another without losing connectivity and services at any time, can be managed by a single mobility controller if roaming is limited to a small number of access points that are physically located together. Roaming among a large number of access points can be managed by multiple mobility controllers in a mobility group.
