PathErr Message Triggered MPLS and GMPLS LSP Reroute

Document Type Replaced Internet-Draft (individual)
Last updated 2010-01-05 (latest revision 2008-07-07)
Replaced by draft-ietf-mpls-gmpls-lsp-reroute
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This document describes how Resource ReserVation Protocol (RSVP) PathErr Messages may be used to trigger rerouting of Multi-Protocol Label Switching (MPLS) and Generalized MPLS (GMPLS) Traffic Engineering (TE) Label Switched Paths (LSPs) without first removing LSP state or resources. Such LSP rerouting may desirable in a number of cases including, for example, soft-preemption and graceful shutdown. This document describes the usage of existing Standards Track mechanisms and defines no new formats or mechanisms. It relies on mechanisms already defined as part of RSVP-TE and simply describes a sequence of actions to be executed.


Lou Berger (
Dimitri Papadimitriou (
JP Vasseur (

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