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Configuring Mobility

SCALANCE WLC711

13-2 C79000-G8976-C260-03, 07/2012, User Guide, V8.11

• Defines the registration behavior for a multi-controller mobility domain set:

– Open mode — A new agent is automatically able to register itself with the mobility

manager and immediately becomes part of the mobility domain

– Secure mode — The mobility manager does not allow a new agent to automatically

administrator approves the new device.

• Listens for connection attempts from mobility agents.

• Establishes connections and sends a message to the mobility agent specifying the heartbeat

interval, and the mobility manager's IP address if it receives a connection attempt from the

agent.

• Sends regular heartbeat messages containing wireless device session changes and agent

changes to the mobility agents and waits for a returned update message

The SCALANCE IWLAN Controller designated as a mobility agent does the following:

• 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

• Sends updates, in response to the heartbeat message, 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 remain active.

• Mobility agents 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.

• 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 lists to service known users

• Existing users remain in the mobility scenario, and if the users are known to the mobility

domain, they continue to be able to roam between connected controllers

• New users become local at attaching controller

• Roaming to another controller resets session

The mobility network that includes all the SCALANCE IWLAN Controllers and the Wireless APs

is called the Mobility Domain.

Note:

The mobility feature is not backward compatible. This means that all the SCALANCE IWLAN Controllers in

the mobility domain must be running the most recent SCALANCE IWLAN Convergence Software release.

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