Hitless restart mechanism for non-stop data-forwarding in the event of L3-mobility control-plane failure in a wireless switch
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United States of America Patent
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Nov 3, 2009
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N/A
app pub date -
Jul 20, 2006
filing date -
Jul 20, 2006
priority date (Note) -
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Abstract
Techniques and technologies are provided for restarting a first wireless switch when the first wireless switch fails. For example, after the first wireless switch fails, the first wireless switch transmits a restart message to its peer wireless switches to begin re-establishing peering sessions with peer wireless switches. The first wireless switch resets its home wireless client database (HWCDb) with information from its data plane wireless client database (KWCDb), and transmits the updated information in its HWCDb to its peer wireless switches. The peer wireless switches store this information in their respective control plane wireless client databases (CPWCDbs), and initially mark the wireless client devices in the respective CPWCDbs as stale entries. Each of the wireless switches then exchanges information from their respective HWCDbs with the first wireless switch (and other peer wireless switches) so that each wireless switch eventually has a wireless client database (WCDb) comprising each of the wireless client devices in the mobility domain.
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