Mobility Overview

The ExtremeWireless system allows up to 12 controllers on a network to discover each other and exchange information about a client session. This technique enables a wireless device user to roam seamlessly between different APs on different controllers.

The solution introduces the concept of a mobility manager; one controller on the network is designated as the mobility manager and all others are designated as mobility agents.

The wireless device keeps the IP address, and the service assignments it received from its home controller—the controller that it first connected to. The WLAN Service on each controller must have the same SSID and RF privacy parameter settings.

You have two options for choosing the mobility manager:

The controller designated as the mobility manager:

The controller designated as a mobility agent does the following:

If a controller configured as the mobility manager is lost, with a backup mobility manager configured, the following occurs:

If a controller configured as the mobility manager is lost, without a backup mobility manager, the following occurs:

The mobility network that includes all the wireless controllers and the APs is called the Mobility Domain.

Note

Note

The mobility feature is not backward compatible. This means that all the controllers in the mobility domain must be running the most recent controller software release.