Carrying Protocol Independent Multicast - Sparse Mode (PIM-SM) in Any-Source Multicast (ASM) Mode Trees over Multipoint LDP (mLDP)
RFC 7442

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Internet Engineering Task Force (IETF)                        Y. Rekhter
Request for Comments: 7442                              Juniper Networks
Category: Standards Track                                    R. Aggarwal
ISSN: 2070-1721                                                   Arktan
                                                              N. Leymann
                                                        Deutsche Telekom
                                                           W. Henderickx
                                                          Alcatel-Lucent
                                                                 Q. Zhao
                                                                   R. Li
                                                                  Huawei
                                                           February 2015

     Carrying Protocol Independent Multicast - Sparse Mode (PIM-SM)
  in Any-Source Multicast (ASM) Mode Trees over Multipoint LDP (mLDP)

Abstract

   When IP multicast trees created by Protocol Independent Multicast -
   Sparse Mode (PIM-SM) in Any-Source Multicast (ASM) mode need to pass
   through an MPLS domain, it may be desirable to map such trees to
   Point-to-Multipoint Label Switched Paths (P2MP LSPs).  This document
   describes how to accomplish this in the case where such P2MP LSPs are
   established using Label Distribution Protocol (LDP) Extensions for
   P2MP and Multipoint-to-Multipoint LSPs: Multipoint LDP (mLDP).

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/rfc7442.

Rekhter, et al.              Standards Track                    [Page 1]
RFC 7442               PIM-SM over P2MP mLDP LSPs          February 2015

Copyright Notice

   Copyright (c) 2015 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
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
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   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. Specification of Requirements ..............................4
   2. Mechanism 1 - Non-transitive Mapping of IP Multicast
      Shared Trees ....................................................4
      2.1. Originating Source Active Auto-discovery Routes
           (Mechanism 1) ..............................................4
      2.2. Receiving Source Active Auto-discovery Routes by LSR .......5
      2.3. Handling (S,G,RPT-bit) State ...............................5
   3. Mechanism 2 - Transitive Mapping of IP Multicast Shared Trees ...6
      3.1. In-Band Signaling for IP Multicast Shared Trees ............6
      3.2. Originating Source Active Auto-discovery Routes
           (Mechanism 2) ..............................................7
      3.3. Receiving Source Active Auto-discovery Routes ..............8
      3.4. Pruning Sources Off the Shared Tree ........................8
      3.5. More on Handling (S,G,RPT-bit) State .......................9
   4. IANA Considerations .............................................9
   5. Security Considerations .........................................9
   6. References .....................................................10
      6.1. Normative References ......................................10
      6.2. Informative References ....................................10
   Acknowledgements ..................................................11
   Authors' Addresses ................................................11

Rekhter, et al.              Standards Track                    [Page 2]
RFC 7442               PIM-SM over P2MP mLDP LSPs          February 2015

1.  Introduction

   [RFC6826] describes how to map Point-to-Multipoint Label Switched
   Paths (P2MP LSPs) created by mLDP [RFC6388] to multicast trees
   created by Protocol Independent Multicast - Sparse Mode (PIM-SM) in
   Source-Specific Multicast (SSM) mode [RFC4607].  This document
   describes how to map mLDP P2MP trees to multicast trees created by