MVPN and MSDP SA Interoperation
draft-zzhang-bess-mvpn-msdp-sa-interoperation-00

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BESS                                                            Z. Zhang
Internet-Draft                                               L. Giuliano
Intended status: Standards Track                        Juniper Networks
Expires: March 31, 2018                               September 27, 2017

                    MVPN and MSDP SA Interoperation
            draft-zzhang-bess-mvpn-msdp-sa-interoperation-00

Abstract

   This document specifies the procedures for interoperation between
   MVPN Source Active routes and customer MSDP Source Active routes,
   which is useful for MVPN provider networks offering services to
   customers with an existing MSDP infrastructure.  Without the
   procedures described in this document, VPN-specific MSDP sessions are
   required among the PEs that are customer MSDP peers.

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 RFC2119.

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   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

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   Copyright (c) 2017 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

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   (https://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
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Table of Contents

   1.  Terminologies . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     2.1.  MVPN RPT-SPT Mode . . . . . . . . . . . . . . . . . . . .   4
   3.  Specification . . . . . . . . . . . . . . . . . . . . . . . .   4
   4.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   4
   5.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   5
   6.  Normative References  . . . . . . . . . . . . . . . . . . . .   5
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   5

1.  Terminologies

   Familiarity with MVPN and MSDP protocols and procedures is assumed.
   Some terminologies are listed below for convenience.

   o  ASM: Any source multicast.

   o  SPT: Source-specific Shortest-path Tree.

   o  C-S: A multicast source address, identifying a multicast source
      located at a VPN customer site.

   o  C-G: A multicast group address used by a VPN customer.

   o  C-RP: A multicast Rendezvous Point for a VPN customer.

   o  EC: Extended Community.

2.  Introduction

   Section "14.  Supporting PIM-SM without Inter-Site Shared C-Trees" of
   [RFC6514] specifies the procedures for MVPN PEs to discover (C-S,C-G)
   via MVPN Source Active A-D routes and then send (C-S,C-G) C-multicast
   routes towards the ingress PEs, to establish SPTs for customer ASM
   flows for which they have downstream receivers.  (C-*,C-G)
   C-multicast routes are not sent among the PEs so inter-site shared
   C-Trees are not used and the method is generally referred to as "spt-
   only" mode.

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   With this mode, the MVPN Source Active routes are functionally
   similar MSDP Source-Active messages [RFC3618].  One or more of the
   PEs, say PE1, either act as a C-RP and learn of (C-S,C-G) via PIM
   Register messages, or have MSDP sessions with some MSDP peers and
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