[Docs] [txt|pdf] [Tracker] [Email] [Nits]

Versions: 00 01 02 draft-ietf-pals-ms-pw-protection

Network Working Group                                    H. van Helvoort
Internet-Draft                                              L. Andersson
Intended status: Standards Track                                A. Malis
Expires: January 2, 2015                    Huawei Technologies Co., Ltd
                                                                 J. Shin
                                                              SK Telecom
                                                                 L. Wang
                                                            China Mobile
                                                         A. D'Alessandro
                                                          Telecom Italia
                                                            July 1, 2014


          Encapsulation for PSC for Multi-Segment Pseudowires
               draft-shawam-pwe3-ms-pw-protection-00.txt

Abstract

   In RFC 6378 'MPLS Transport Profile (MPLS-TP) Linear Protection', as
   well as in the later updates of this RFC, the Protection State
   Coordiantion (PSC) protocol was defined for MPLS LSPs only.  This
   draft extends RFC 6378 to be applicable for pseudowires as well.

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
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at http://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   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 January 2, 2015.

Copyright Notice

   Copyright (c) 2014 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
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of



van Helvoort, et al.     Expires January 2, 2015                [Page 1]


Internet-Draft              MS-PW Protection                   July 2014


   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  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Encapsulation of the PSC protocol for Pseudowires . . . . . .   2
   3.  Security Considerations . . . . . . . . . . . . . . . . . . .   3
   4.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   3
   5.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   3
   6.  Normative References  . . . . . . . . . . . . . . . . . . . .   3
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   3

1.  Introduction

   In RFC 6378 'MPLS Transport Profile (MPLS-TP) Linear Protection'
   [RFC6378], as well as in the later updates of this RFC in 'MPLS
   Transport Profile (MPLS-TP) Linear Protection to Match the
   Operational Expectations of SDH, OTN and Ethernet Transport Network
   Operators' [RFC7271] and in 'Updates to MPLS Transport Profile Linear
   Protection' [I-D.ietf-mpls-psc-updates], the Protection State
   Coordination (PSC) protocol was defined for MPLS LSPs only.

   This draft extends RFC 6378 to be applicable for pseudowires (PWs) as
   well.  This is useful especially in the case of end-to-end static
   provisioned Multi-Segment PWs (MS-PWs) running over MPLS-TP where we
   can't rely on tunnel protection alone for end-to- end protection of
   PWs against switching PE (S-PE) failure.

2.  Encapsulation of the PSC protocol for Pseudowires

   The PSC protocol can be used to protect against defects on any LSP
   (segment, link or path).  Linear protection protects an LSP end-to-
   end and if a failure is detected, switches traffic over to another
   (redundant) set of resources.

   Obviously, the protected entity does not need to be of the same type
   as the protecting, it is possible to protect a link by a path.
   Likewise it is possible to protect a PW with a MS-PW.

   From a PSC protocol point of view it is possible to view a PW as a
   single hop LSP, and a MS-PW as a multiple hop LSP.  The PSC protocol
   will work just as specified in RFC 6378.




van Helvoort, et al.     Expires January 2, 2015                [Page 2]


Internet-Draft              MS-PW Protection                   July 2014


   Thus the G-ACh carrying the PSC protocol information is placed in the
   label stack directly beneath the PW identifier.

3.  Security Considerations

   The security considerations defined for RFC 6378 apply to this
   document as well.  As this is simply a re-use of RFC 6378, there are
   no new security considerations.

4.  IANA Considerations

   There are no requests for IANA actions in this document.

   Note to the RFC Editor - this section can be removed before
   publication.

5.  Acknowledgements

   TBA

6.  Normative References

   [I-D.ietf-mpls-psc-updates]
              Osborne, E., "Updates to MPLS Transport Profile Linear
              Protection", draft-ietf-mpls-psc-updates-06 (work in
              progress), May 2014.

   [RFC6378]  Weingarten, Y., Bryant, S., Osborne, E., Sprecher, N., and
              A. Fulignoli, "MPLS Transport Profile (MPLS-TP) Linear
              Protection", RFC 6378, October 2011.

   [RFC7271]  Ryoo, J., Gray, E., van Helvoort, H., D'Alessandro, A.,
              Cheung, T., and E. Osborne, "MPLS Transport Profile (MPLS-
              TP) Linear Protection to Match the Operational
              Expectations of Synchronous Digital Hierarchy, Optical
              Transport Network, and Ethernet Transport Network
              Operators", RFC 7271, June 2014.

Authors' Addresses

   Huub van Helvoort
   Huawei Technologies Co., Ltd

   Email: huub.van.helvoort@huawei.com







van Helvoort, et al.     Expires January 2, 2015                [Page 3]


Internet-Draft              MS-PW Protection                   July 2014


   Loa Andersson
   Huawei Technologies Co., Ltd

   Email: loa@mail01.huawei.com


   Andrew G. Malis
   Huawei Technologies Co., Ltd

   Email: Andrew.Malis@huawei.com


   Jongyoon Shin
   SK Telecom

   Email: jongyoon.shin@sk.com


   Lei Wang
   China Mobile

   Email: wangleiyj@chinamobile.com


   Alessandro D'Alessandro
   Telecom Italia

   Email: alessandro.dalessandro@telecomitalia.it























van Helvoort, et al.     Expires January 2, 2015                [Page 4]


Html markup produced by rfcmarkup 1.129d, available from https://tools.ietf.org/tools/rfcmarkup/