MVPN and MSDP SA Interoperation
draft-ietf-bess-mvpn-msdp-sa-interoperation-04

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BESS                                                            Z. Zhang
Internet-Draft                                               L. Giuliano
Updates: 6514 (if approved)                             Juniper Networks
Intended status: Standards Track                        October 16, 2019
Expires: April 18, 2020

                    MVPN and MSDP SA Interoperation
             draft-ietf-bess-mvpn-msdp-sa-interoperation-04

Abstract

   This document specifies the procedures for interoperation between
   Multicast Virtual Private Network (MVPN) Source Active routes and
   customer Multicast Source Discovery Protocol (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.  This document
   updates RFC6514.

Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
   "OPTIONAL" in this document are to be interpreted as described in BCP
   14 [RFC2119] [RFC8174] when, and only when, they appear in all
   capitals, as shown here.

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 https://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 April 18, 2020.

Zhang & Giuliano         Expires April 18, 2020                 [Page 1]
Internet-Draft                mvpn-sa-msdp                  October 2019

Copyright Notice

   Copyright (c) 2019 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
   (https://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
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   described in the Simplified BSD License.

Table of Contents

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

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.

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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.

   With this mode, the MVPN Source Active routes are functionally