188 Configuring and Managing Mobility Domain Roaming
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Effects of Timers on Roaming
An unsuccessful roaming attempt might be caused by the following timers. You cannot configure either timer.
• Grace period. A disassociated session has a grace period of 5 seconds during which WSS Software can retrieve
and forward the session history. After 5 seconds, WSS Software clears the session, and its accounting is stopped.
• MAC address search. If WSS Software cannot find the client’s MAC address in a Mobility Domain within
5 seconds, it treats the session as a new session rather than a roaming session.
In contrast, the 802.1X reauthentication timeout period has little effect on roaming. If the timeout expires, WSS
Software performs 802.1X processing on the existing association. Accounting and roaming history are unaffected when
reauthentication is successful, because the client is still associated with the same AP. If reauthentication fails, WSS
Software clears the session so it is not eligible for roaming.
If the client associates with the same AP, the session is recorded as a new session.
(To change the reauthentication timeout, see “Setting the 802.1X Reauthentication Period” on page 498.)
