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Router with Fast Convergence: LSA Correlation

[Category : - Computers and computer accessories ]
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The invention relates to computer networks, and particularly, to link state routing protocols used in computer networks.

Link state routing protocols such as open-shortest-path-first (“OSPF”) and intermediate-system-to-intermediate-system (“IS-IS”), using a shortest path first (“SPF”) routing, are commonly used interior gateway protocols (“IGP”) on the Internet. An IGP generally provides functionalities of the routing within an autonomous system (“AS”). A link state routing protocol typically divides an AS into multiple areas.


A method, and a system, called link state advertisement ("LSA") correlation, for scheduling routing table updates following a topology change. LSA correlation correlates information in the LSAs to identify the topology change that led to their generation. A routing table update is performed when a topology change has been identified.


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