MVPN/EVPN C-Multicast Routes Enhancements
draft-zzhang-bess-mvpn-evpn-cmcast-enhancements-01

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Last updated 2019-03-11
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BESS                                                            Z. Zhang
Internet-Draft                                                 R. Kebler
Updates: 6513, 6514 (if approved)                                 W. Lin
Intended status: Standards Track                        Juniper Networks
Expires: September 12, 2019                                     E. Rosen
                                                          March 11, 2019

               MVPN/EVPN C-Multicast Routes Enhancements
           draft-zzhang-bess-mvpn-evpn-cmcast-enhancements-01

Abstract

   [RFC6513] and [RFC6514] specify procedures for originating,
   propagating, and processing "C-multicast routes".  However, there are
   a number of MVPN use cases that are not properly or optimally handled
   by those procedures.  This document describes those use cases, and
   specifies the additional procedures needed to handle them.  Some of
   the additional procedures are also applicable to EVPN SMET routes [I-
   D.ietf-bess-evpn-igmp-mld-proxy].

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].

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
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   This Internet-Draft will expire on September 12, 2019.

Zhang, et al.          Expires September 12, 2019               [Page 1]
Internet-Draft          C-Multicast Enhancements              March 2019

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   3
     1.2.  MVPN C-Bidir Support with VPN Backbone being RPL  . . . .   4
       1.2.1.  C-multicast Routes for the MVPN-RPL Method of C-BIDIR
               support . . . . . . . . . . . . . . . . . . . . . . .   4
       1.2.2.  Optional use of MVPN-RPL RD with mLDP/PIM Provider
               Tunnels . . . . . . . . . . . . . . . . . . . . . . .   5
       1.2.3.  MVPN C-ASM Support without CE Routers . . . . . . . .   6
     1.3.  Inter-AS Propagation of MVPN C-Multicast Routes . . . . .   6
     1.4.  MVPN Inter-AS Upstream PE Selection . . . . . . . . . . .   8
     1.5.  EVPN Selective Multicast Ethernet Tag (SMET) Routes . . .   9
     1.6.  Provider Tunnel Segmentation with Explicit-Tracking
           C-Multicast Routes  . . . . . . . . . . . . . . . . . . .  11
       1.6.1.  Conventional Tunnel Segmentation  . . . . . . . . . .  11
       1.6.2.  Selective Tunnel Segmentation with Untargeted
               Explicit-Tracking C-multicast Routes  . . . . . . . .  11
   2.  Specifications  . . . . . . . . . . . . . . . . . . . . . . .  12
     2.1.  MVPN C-Bidir Support with VPN Backbone being RPL  . . . .  12
       2.1.1.  Constructing C-Multicast Share Tree Join route  . . .  12
       2.1.2.  Setting Up the MVPN-RPL . . . . . . . . . . . . . . .  13
     2.2.  Inter-AS Propagation of MVPN C-Multicast Routes . . . . .  14
       2.2.1.  Procedures in Section 11.2 of [RFC6514] . . . . . . .  14
       2.2.2.  Ordinary BGP Propagation Procedures . . . . . . . . .  15
     2.3.  Inter-AS Upstream PE Selection  . . . . . . . . . . . . .  15
     2.4.  Duplication Prevention on the Same Inclusive Inter-AS
           Tunnel  . . . . . . . . . . . . . . . . . . . . . . . . .  16
       2.4.1.  Using PE Distinguisher Labels . . . . . . . . . . . .  16
       2.4.2.  Ingress ASBR Filtering Out Duplications . . . . . . .  16
     2.5.  Provider Tunnel Segmentation with Explicit-Tracking
           C-Multicast Routes  . . . . . . . . . . . . . . . . . . .  17
       2.5.1.  Egress PEs and RBRs . . . . . . . . . . . . . . . . .  17
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