Multiplex communications – Data flow congestion prevention or control – Flow control of data transmission through a network
Reexamination Certificate
2007-11-06
2007-11-06
Vu, Huy D. (Department: 2616)
Multiplex communications
Data flow congestion prevention or control
Flow control of data transmission through a network
C714S004110
Reexamination Certificate
active
10153500
ABSTRACT:
In highly-available Open Shortest Path First (OSPF) routing in a network, the dynamic state of a backup OSPF instance in a router is synchronized with the dynamic state of an active OSPF instance using explicit message transmission from the active instance to the backup instance. After this, the dynamic state synchronization of the backup OSPF instance is maintained using a combination of explicit message updates from the active OSPF instance together with a message flow-through mechanism. In the event of fail-over of the active OSPF instance, then the router recovers seamlessly without reconfiguring or interrupting traffic among peer routers in the network, by functionally substituting the synchronized backup OSPF instance for the active OSPF instance, such that the backup OSPF instance establishes itself as the new active OSPF instance.
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Folkes Ronald P.
Visser Lance A.
Watson Thomas L.
Chiaro Networks Ltd
Novick Harold
Protigal Stanley N.
The Nath Law Group
Vu Huy D.
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