Fast Reroute for Node Protection in LDP-based LSPs
draft-esale-mpls-ldp-node-frr-05

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MPLS Working Group                                         Santosh Esale
INTERNET-DRAFT                                           Raveendra Torvi
Intended Status: Proposed Standard                      Juniper Networks
Expires: September 14, 2017                                             
                                                             Luyuan Fang
                                                               Microsoft

                                                              Luay Jalil
                                                                 Verizon

                                                          March 13, 2017

           Fast Reroute for Node Protection in LDP-based LSPs
                    draft-esale-mpls-ldp-node-frr-05

Abstract

   This document describes procedures to support node protection for
   unicast Label Switched Paths (LSPs) established by Label Distribution
   Protocol (LDP).  In order to protect a node N, the Point of Local
   Repair (PLR) of N must discover the Merge Points (MPs) of node N such
   that traffic can be redirected to them in case of node N failure.
   Redirecting the traffic around the failed node N depends on existing
   point-to-point LSPs originated from the PLR to the MPs while
   bypassing the protected node N.  The procedures described in this
   document are topology independent in a sense that they provide node
   protection in any topology so long as there is a alternate path in
   the network that avoids the protected node. 

Status of this Memo

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   http://www.ietf.org/1id-abstracts.html

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Copyright and License Notice

   Copyright (c) 2017 IETF Trust and the persons identified as the
   document authors. All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
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Table of Contents

   1. Introduction  . . . . . . . . . . . . . . . . . . . . . . . . .  2
     1.1 Abbreviations  . . . . . . . . . . . . . . . . . . . . . . .  4
   3. Merge Point (MP) Discovery  . . . . . . . . . . . . . . . . . .  4
   4. Constructing Bypass LSPs  . . . . . . . . . . . . . . . . . . .  5
   5. Obtaining Label Mapping from MP . . . . . . . . . . . . . . . .  6
   6. Forwarding Considerations . . . . . . . . . . . . . . . . . . .  6
   7. Synergy with node protection in mLDP  . . . . . . . . . . . . .  7
   8. Security Considerations . . . . . . . . . . . . . . . . . . . .  7
   9. IANA Considerations . . . . . . . . . . . . . . . . . . . . . .  7
   10. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . .  7
   11. Normative References . . . . . . . . . . . . . . . . . . . . .  7
   12. Informative References . . . . . . . . . . . . . . . . . . . .  7
   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . .  8

1. Introduction

   This document describes procedures to support node protection for
   unicast Label Switched Paths (LSPs) established by Label Distribution
   Protocol (LDP) [RFC5036]. In order to protect a node N, the Point of
   Local Repair (PLR) of N must discover the Merge Points (MPs) of node
   N such that traffic can be redirected to them in case of node N
 

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   failure.  Redirecting the traffic around the failed node N depends on
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