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Fast Reroute Extensions to RSVP-TE for LSP Tunnels (RFC4090)

IP.com Disclosure Number: IPCOM000125307D
Original Publication Date: 2005-May-01
Included in the Prior Art Database: 2005-May-26
Document File: 39 page(s) / 84K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

P. Pan: AUTHOR [+6]

Abstract

This document defines RSVP-TE extensions to establish backup label- switched path (LSP) tunnels for local repair of LSP tunnels. These mechanisms enable the re-direction of traffic onto backup LSP tunnels in 10s of milliseconds, in the event of a failure.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 3% of the total text.

Network Working Group                                        P. Pan, Ed.
Request for Comments: 4090                            Hammerhead Systems
Category: Standards Track                                G. Swallow, Ed.
                                                           Cisco Systems
                                                           A. Atlas, Ed.
                                                           Avici Systems
                                                                May 2005


           Fast Reroute Extensions to RSVP-TE for LSP Tunnels

Status of This Memo

   This document specifies an Internet standards track protocol for the
   Internet community, and requests discussion and suggestions for
   improvements.  Please refer to the current edition of the "Internet
   Official Protocol Standards" (STD 1) for the standardization state
   and status of this protocol.  Distribution of this memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (2005).

Abstract

   This document defines RSVP-TE extensions to establish backup label-
   switched path (LSP) tunnels for local repair of LSP tunnels.  These
   mechanisms enable the re-direction of traffic onto backup LSP tunnels
   in 10s of milliseconds, in the event of a failure.

   Two methods are defined here.  The one-to-one backup method creates
   detour LSPs for each protected LSP at each potential point of local
   repair.  The facility backup method creates a bypass tunnel to
   protect a potential failure point; by taking advantage of MPLS label
   stacking, this bypass tunnel can protect a set of LSPs that have
   similar backup constraints.  Both methods can be used to protect
   links and nodes during network failure.  The described behavior and
   extensions to RSVP allow nodes to implement either method or both and
   to interoperate in a mixed network.


Pan, et al.                 Standards Track                     [Page 1]
RFC 4090                  RSVP-TE Fast Reroute                  May 2005


Table of Contents

   1.  Introduction ...................................................3
       1.1.  Background ...............................................4
   2.  Terminology ....................................................4
   3.  Local Repair Techniques ........................................6
       3.1.  One-to-One Backup ........................................6
       3.2.  Facility Backup ..........................................7
   4.  RSVP Exte...