Mobility Domain Topologies - Extreme Networks Summit WM User Manual

Mobility
Sends regular Heartbeat messages containing wireless device session changes and agent changes to
the mobility agents and waits for a returned update message
The Summit WM Controller designated as a mobility agent:
Uses SLP or a statically configured IP address to locate the mobility manager
Defines at the agent the IP address of the mobility manager, which allows for the bypass of SLP.
Agents directly find and attempt to register with the mobility manager.
Attempts to establish a TCP/IP connection with the mobility manager
In response to the 'heartbeat' message, the mobility agent sends updates on the wireless device users
and the data tunnels to the mobility manager.
If a controller configured as the mobility manager is lost, the following occurs:
Agent to agent connections will remain active.
Mobility agents will continue to operate based on the mobility information last coordinated before
the manager link was lost. The mobility location list remains relatively unaffected by the controller
failure. Only entries associated with the failed controller are cleared from the registration list, and
users that have roamed from the manager controller to other agents are terminated and required to
re-register as local users with the agent where they are currently located.
Participant controllers are reset to nodal operation
Any user sessions that roamed away from their home AP are terminated and must reconnect
Users need to reconnect to network, re-authenticate, and obtain new IP address
The data link between active controllers remains active after the loss of a mobility manager
Mobility agents continue to use the last set of mobility location list to service known users
Existing users:
Existing users remain in mobility scenario, and if the users are known to mobility domain, they
continue to be able to roam between connected controllers
New users:
New users become local at attaching controller
Roaming to another controller resets session
NOTE
The mobility network that includes all the Summit WM Controllers and the Altitude APs is called Mobility Domain.
NOTE
The mobility feature is not backward compatible. This means that all the Summit WM Controllers in the mobility
domain must be running Summit WM Software V5R3 release.

Mobility domain topologies

You can configure the mobility domain with the following topologies:
Mobility domain without any availability
Mobility domain with availability
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Summit WM User Guide, Software Version 5.3