mLDP Node Protection
draft-ietf-mpls-mldp-node-protection-02

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Document Type Active Internet-Draft (mpls WG)
Last updated 2014-11-13
Replaces draft-wijnands-mpls-mldp-node-protection
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Network Working Group                                  IJ. Wijnands, Ed.
Internet-Draft                                                  E. Rosen
Intended status: Standards Track                                 K. Raza
Expires: May 17, 2015                                Cisco Systems, Inc.
                                                             J. Tantsura
                                                                Ericsson
                                                                A. Atlas
                                                        Juniper Networks
                                                                 Q. Zhao
                                                       Huawei Technology
                                                       November 13, 2014

                          mLDP Node Protection
                draft-ietf-mpls-mldp-node-protection-02

Abstract

   This document describes procedures to support node protection for
   Point-to-Multipoint and Multipoint-to-Multipoint Label Switched Paths
   (MP LSPs) built by LDP ("Label Distribution Protocol"), or simply
   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
   originated from the PLR LSR to the MPT LSRs while bypassing LSR node
   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 May 17, 2015.

Copyright Notice

   Copyright (c) 2014 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
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   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 . . . . . . . . . . . . . . . . . . . . . 10
       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 . . . . . . . . . . . . . . . . . . . . . . . . . . 14
     9.1.  Normative References . . . . . . . . . . . . . . . . . . . 14
     9.2.  Informative References . . . . . . . . . . . . . . . . . . 15
   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 15

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