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Definition of P2MP PW TLV for LSP-Ping Mechanisms

Document type: Active Internet-Draft (pals WG)
Document stream: IETF
Last updated: 2014-11-16 (latest revision 2014-06-18)
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Network Working Group                                   Parag Jain, Ed. 
     Internet Draft                                             Sami Boutros 
     Intended status: Standards Track                    Cisco Systems, Inc. 
     Expires: December 18, 2014                                                                                                     
                                                                  Sam Aldrin 
                                                         Huawei Technologies 
                                                         June 17, 2014 
                  Definition of P2MP PW TLV for LSP-Ping Mechanisms 

        LSP-Ping is a widely deployed Operation, Administration, and 
        Maintenance (OAM) mechanism in MPLS networks. This document 
        describes a mechanism to verify connectivity of Point-to-Multipoint 
        (P2MP) Pseudowires (PW) using LSP Ping. 

      Status of this Memo 

        This Internet-Draft is submitted in full conformance with the 
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        Copyright (c) 2011 IETF Trust and the persons identified as the 
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        This document is subject to BCP 78 and the IETF Trust's Legal 
        Provisions Relating to IETF Documents 
        ( in effect on the date of 
     Jain                      Expires December 2014                   [Page 1] 

     Internet-Draft  draft-jain-pwe3-p2mp-pw-lsp-ping-03.txt    June 2014 

        publication of this document.  Please review these documents 
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     Table of Contents 

       1. Introduction                                            2 
       2. Conventions used in this document                       3 
       3. Terminology                                             3 
       4. Identifying a P2MP PW                                   3 
          4.1. FEC 130 Pseudowire Sub-TLV                         4 
       5. Operations                                              4 
       6. Echo Reply using Downstream Assigned Label              6 
       7. Controlling Echo Responses                              6 
       8. Security Considerations                                 6 
       9. IANA Considerations                                     6 
       10. References                                             6 
          10.1. Normative References                              6 
          10.2. Informative References                            7 
       11. Acknowledgments                                        7 

     1. Introduction 

        A Point-to-Multipoint (P2MP) Pseudowire (PW) emulates the essential 
        attributes of a unidirectional P2MP Telecommunications service such 
        as P2MP ATM over PSN. Requirements for P2MP PW are described in 
        [PPWREQ]. P2MP PWs are carried over P2MP MPLS LSP. The Procedure for 
        P2MP PW signaling using LDP for single segment P2MP PWs are 
        described in [PPWPWE3]. Many P2MP PWs can share the same P2MP MPLS 
        LSP and this arrangement is called Aggregate P-tree. The aggregate 
        P2MP trees require an upstream assigned label so that on the tail of 
        the P2MP LSP, the traffic can be associated with a VPN or a VPLS 
        instance. When a P2MP MPLS LSP carries only one VPN or VPLS service 
        instance, the arrangement is called Inclusive P-Tree. For Inclusive 
        P-Trees, P2MP MPLS LSP label itself can uniquely identify the VPN or 
        VPLS service being carried over P2MP MPLS LSP. The P2MP MPLS LSP can 
        also be used in Selective P-Tree arrangement for carrying multicast 
        traffic. In a Selective P-Tree arrangement, traffic to each 

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