Method and apparatus for hitless failover in networking systems using single database
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United States of America Patent
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Mar 6, 2018
Issued Date -
N/A
app pub date -
Oct 27, 2014
filing date -
Nov 18, 2009
priority date (Note) -
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Abstract
A device includes a master control card that performs control plane processing, a backup control card, where the backup control card takes over control plane processing if the master control card goes out of service, and a database card that connects to the master control card and the backup control card, where the database control card stores information relating to control plane processing. A method of achieving hitless failover in a network element includes detecting that a master control card of the network element has gone out of service, designating the backup control card as a new master control card of the network element, establishing communication with a database card of the network element, and retrieving protocol states information from the database card.
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