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Multipoint LDP (mLDP) Node Protection (RFC7715)

IP.com Disclosure Number: IPCOM000245070D
Original Publication Date: 2016-Jan-01
Included in the Prior Art Database: 2016-Feb-07
Document File: 38 page(s) / 39K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

IJ. Wijnands: AUTHOR [+6]

Abstract

This document describes procedures to support node protection for Point-to-Multipoint and Multipoint-to-Multipoint Label Switched Paths (P2MP and MP2MP LSPs) that have been built by the Multipoint Label Distribution Protocol (mLDP) [RFC6388]. 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. The procedures to set up these P2P LSPs are outside the scope of this document, but one can imagine using techniques based on the Resource Reservation Protocol for Traffic Engineering (RSVP-TE) [RFC5420] or Label Distribution Protocol (LDP) Loop-Free Alternate (LFA) [RFC5286] to accomplish this.

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Internet Engineering Task Force (IETF)                 IJ. Wijnands, Ed. Request for Comments: 7715                                       K. Raza Category: Standards Track                            Cisco Systems, Inc. ISSN: 2070-1721                                                 A. Atlas                                                   Juniper Networks, Inc.                                                              J. Tantsura                                                                 Ericsson                                                                  Q. Zhao                                                        Huawei Technology                                                             January 2016

                  Multipoint LDP (mLDP) Node Protection

Abstract

   This document describes procedures to support node protection for    Point-to-Multipoint and Multipoint-to-Multipoint Label Switched Paths    (P2MP and MP2MP LSPs) that have been built by the Multipoint Label    Distribution Protocol (mLDP).  In order to protect a node N, the    Point of Local Repair (PLR) Label Switching Router (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 Point-to-Point (P2P)    Label Switched Paths (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 is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force    (IETF).  It represents the consensus of the IETF community.  It has    received public review and has been approved for publication by the    Internet Engineering Steering Group (IESG).  Further information on    Internet Standards is available in Section 2 of RFC 5741.

   Information about the current status of this document, any errata,    and how to provide feedback on it may be obtained at    http://www.rfc-editor.org/info/rfc7715.

Wijnands, et al.             Standards Track                    [Page 1]
 RFC 7715                  mLDP Node Protection              January 2016

 Copyright Notice

   Copyright (c) 2016 IETF Trust and the persons identified as the    document authors.  All rights reserved.

   This docu...