mLDP Node Protection
draft-ietf-mpls-mldp-node-protection-04

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Document Type Active Internet-Draft (mpls WG)
Last updated 2015-02-09
Replaces draft-wijnands-mpls-mldp-node-protection
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Network Working Group                                  IJ. Wijnands, Ed.
Internet-Draft                                                   K. Raza
Intended status: Standards Track                     Cisco Systems, Inc.
Expires: August 13, 2015                                        E. Rosen
                                                                A. Atlas
                                                  Juniper Networks, Inc.
                                                             J. Tantsura
                                                                Ericsson
                                                                 Q. Zhao
                                                       Huawei Technology
                                                        February 9, 2015

                          mLDP Node Protection
                draft-ietf-mpls-mldp-node-protection-04

Abstract

   This document describes procedures to support node protection for
   Point-to-Multipoint and Multipoint-to-Multipoint Label Switched Paths
   (MP LSPs) that has been built by "Multipoint Label Distribution
   Protocol"(mLDP).  In order to protect a node N, the Point of Local
   Repair (PLR) LSR of N must learn the Merge Point (MPT) LSR(s) of node
   N such that traffic can be redirected to them in case node N fails.
   Redirecting the traffic around the failed node N depends on existing
   P2P LSPs.  The pre-established LSPs originate from the PLR LSR and
   terminate on the MPT LSRs while bypassing LSR N.

Status of this Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
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   Internet-Drafts are draft documents valid for a maximum of six months
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   This Internet-Draft will expire on August 13, 2015.

Copyright Notice

   Copyright (c) 2015 IETF Trust and the persons identified as the

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   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
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   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  3
     1.1.  Conventions used in this document  . . . . . . . . . . . .  3
     1.2.  Terminology  . . . . . . . . . . . . . . . . . . . . . . .  3
   2.  PLR Determination  . . . . . . . . . . . . . . . . . . . . . .  4
     2.1.  Transit node procedure . . . . . . . . . . . . . . . . . .  4
     2.2.  MP2MP root node procedure  . . . . . . . . . . . . . . . .  5
     2.3.  PLR information encoding . . . . . . . . . . . . . . . . .  5
   3.  Using the tLDP session . . . . . . . . . . . . . . . . . . . .  7
   4.  Link or node failure . . . . . . . . . . . . . . . . . . . . .  9
     4.1.  Re-convergence after node/link failure . . . . . . . . . . 10
       4.1.1.  Node failure . . . . . . . . . . . . . . . . . . . . . 10
       4.1.2.  Link failure . . . . . . . . . . . . . . . . . . . . . 11
       4.1.3.  Switching to new primary path  . . . . . . . . . . . . 11
   5.  mLDP Capabilities for Node Protection  . . . . . . . . . . . . 11
     5.1.  PLR capability . . . . . . . . . . . . . . . . . . . . . . 12
     5.2.  MPT capability . . . . . . . . . . . . . . . . . . . . . . 12
     5.3.  The Protected LSR  . . . . . . . . . . . . . . . . . . . . 12
     5.4.  The Node Protection Capability . . . . . . . . . . . . . . 13
   6.  Security Considerations  . . . . . . . . . . . . . . . . . . . 14
   7.  IANA considerations  . . . . . . . . . . . . . . . . . . . . . 14
   8.  Acknowledgments  . . . . . . . . . . . . . . . . . . . . . . . 14
   9.  References . . . . . . . . . . . . . . . . . . . . . . . . . . 15
     9.1.  Normative References . . . . . . . . . . . . . . . . . . . 15
     9.2.  Informative References . . . . . . . . . . . . . . . . . . 15
   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 15

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