RSVP-TE LSP egress fast-protection

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Last updated 2014-05-07 (latest revision 2013-11-03)
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RFC4090 defines a fast reroute mechanism for locally repairing an RSVP-TE LSP in the order of 10s of milliseconds, in the event of a downstream link or node failure. However, this mechanism does not provide node protection for LSP egress nodes, even when an alternate egress node (a backup egress) is available that could carry the traffic to its ultimate destination. This document addresses this scenario and describes how to provide egress protection by establishing a bypass LSP from the penultimate-hop node of a LSP to the backup egress node. The methods described in this document enable local repair in the order of 10s of milliseconds, in the event of the egress node failure. These methods are only applicable if traffic carried by the LSP can be rerouted to its ultimate destination by the backup egress node.


Jeyananth Jeganathan (
Hannes Gredler (
Yimin Shen (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)