Electrical computers and digital processing systems: multicomput – Computer-to-computer data routing
Reexamination Certificate
2007-02-06
2007-02-06
Caldwell, Andrew (Department: 2142)
Electrical computers and digital processing systems: multicomput
Computer-to-computer data routing
C709S237000, C714S004110
Reexamination Certificate
active
09844420
ABSTRACT:
Methods and apparatus are provided for optimizing the reintroduction of a network node into a network. Information about neighboring nodes is stored in persistent memory. The network node can then be reinitialized and reintroduced into the network. Upon reintroduction, the network node can transmit heartbeat messages such as Hello messages to its neighboring nodes using information stored in persistent memory. A link state packet request message such as a Complete Sequence Numbers Packet referencing dummy link state information is transmitted to a neighboring node. A partial packet request message such as a Partial Sequence Numbers Packet referencing the dummy link state packet from the neighboring node can acknowledge that the Complete Sequence Numbers Packet has been received.
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R. Callon, “Use of OSI IS-IS for Routing in TCP/IP and Dual Environments” RFC 1195, Dec. 1990, 79 pages.
Schaefer Mark T.
Shand Ian Michael Charles
Beyer Weaver & Thomas LLP
Blair Douglas
Caldwell Andrew
Cisco Technology Inc.
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