Fast reroute using maximally redundant trees

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United States of America Patent

PATENT NO 8861340
SERIAL NO

13418152

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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Network devices provide Internet Protocol (IP) and Label Distribution Protocol (LDP) fast reroute for unicast and multicast traffic. The approach described herein for fast reroute for IP and LDP uses maximally redundant trees (MRTs). MRTs are a pair of trees where the path from any node X to the root R along the first tree and the path from the same node X to the root along the second tree share the minimum number of nodes and the minimum number of links. A network device, such as a router, computes a pair of MRTs for each destination and installs one or more MRT alternate next-hops in its forwarding plane for use in forwarding network traffic to a destination in the event a failure occurs that renders a primary next-hop unusable for reaching the destination.

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Patent Owner(s)

  • JUNIPER NETWORKS, INC.

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Atlas, Alia Arlington, US 6 107

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