Dual-Homing Coordination for MPLS Transport Profile (MPLS-TP) Pseudowires Protection
draft-ietf-pals-mpls-tp-dual-homing-coordination-06

Document Type Active Internet-Draft (pals WG)
Last updated 2017-05-19 (latest revision 2017-04-25)
Replaces draft-cheng-pwe3-mpls-tp-dual-homing-coordination
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Network Working Group                                           W. Cheng
Internet-Draft                                                   L. Wang
Intended status: Standards Track                                   H. Li
Expires: October 28, 2017                                   China Mobile
                                                                 J. Dong
                                                     Huawei Technologies
                                                         A. D'Alessandro
                                                          Telecom Italia
                                                          April 26, 2017

     Dual-Homing Coordination for MPLS Transport Profile (MPLS-TP)
                         Pseudowires Protection
          draft-ietf-pals-mpls-tp-dual-homing-coordination-06

Abstract

   In some scenarios, MPLS Transport Profile (MPLS-TP) Pseudowires (PWs)
   (RFC 5921) may be statically configured, when a dynamic control plane
   is not available.  A fast protection mechanism for MPLS-TP PWs is
   needed to protect against the failure of an Attachment Circuit (AC),
   the failure of a Provider Edge (PE), or a failure in the Packet
   Switched Network (PSN).  The framework and typical scenarios of dual-
   homing PW local protection are described in [draft-ietf-pals-mpls-tp-
   dual-homing-protection].  This document proposes a dual-homing
   coordination mechanism for MPLS-TP PWs, which is used for state
   exchange and switchover coordination between the dual-homing PEs for
   dual-homing PW local protection.

Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in RFC 2119 [RFC2119].

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
   Task Force (IETF).  Note that other groups may also distribute
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   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any

Cheng, et al.           Expires October 28, 2017                [Page 1]
Internet-Draft  Dual-Homing Coordination for MPLS-TP PWs      April 2017

   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on October 28, 2017.

Copyright 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
   2.  Overview of the Proposed Solution . . . . . . . . . . . . . .   3
   3.  Protocol Extensions for Dual-Homing MPLS-TP PW Protection . .   4
     3.1.  Information Exchange Between Dual-Homing PEs  . . . . . .   5
     3.2.  Protection Procedures . . . . . . . . . . . . . . . . . .   9
   4.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  13
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .  13
   6.  Contributors  . . . . . . . . . . . . . . . . . . . . . . . .  14
   7.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  14
     7.1.  Normative References  . . . . . . . . . . . . . . . . . .  14
     7.2.  Informative References  . . . . . . . . . . . . . . . . .  15
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  16

1.  Introduction

   [RFC6372], [RFC6378] and [RFC7771] describe the framework and
   mechanism of MPLS Transport Profile (MPLS-TP) linear protection,
   which can provide protection for the MPLS Label Switched Path (LSP)
   and Pseudowires (PWs) between the edge nodes.  These mechanisms
   cannot protect the failure of the Attachment Circuit (AC) or the edge
   nodes.  [RFC6718] and [RFC6870] specifies the PW redundancy framework
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