Propagation of routing information in RSVP-TE for inter-domain TE-LSPs

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United States of America Patent

PATENT NO 8549176
SERIAL NO

11001349

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Abstract

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A technique dynamically retrieves reachability information from a target node, including a tail-end or any intermediate node, along a traffic engineering (TE) label switched path (LSP) that spans multiple domains in a computer network. The interdomain information retrieval technique is illustratively based on a request/response signaling exchange whereby at least a portion of the reachability, i.e., routing, information maintained by the target node is propagated to a head-end node of the TE-LSP. The routing information may comprise a list of address prefixes reachable by the target node, but may optionally include next-hop and metric attributes associated with those prefixes. The head-end node uses the retrieved routing information to calculate routes reachable from the target node for insertion into its routing table.

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Patent Owner(s)

  • CISCO TECHNOLOGY, INC.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Previdi, Stefano B Rome, IT 78 4108
Vasseur, Jean-Philippe Dunstable, US 781 20955

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