BIER Ingress Multicast Flow Overlay using Multicast Listener Discovery Protocols
draft-ietf-bier-mld-02

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Network Working Group                                         P. Pfister
Internet-Draft                                              IJ. Wijnands
Intended status: Standards Track                               S. Venaas
Expires: January 9, 2020                                   Cisco Systems
                                                                 C. Wang

                                                                Z. Zhang
                                                         ZTE Corporation
                                                             M. Stenberg
                                                            July 8, 2019

 BIER Ingress Multicast Flow Overlay using Multicast Listener Discovery
                               Protocols
                         draft-ietf-bier-mld-02

Abstract

   This document specifies the ingress part of a multicast flow overlay
   for BIER networks.  Using existing multicast listener discovery
   protocols, it enables multicast membership information sharing from
   egress routers, acting as listeners, toward ingress routers, acting
   as queriers.  Ingress routers keep per-egress-router state, used to
   construct the BIER bit mask associated with IP multicast packets
   entering the BIER domain.

Status of This Memo

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

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   This Internet-Draft will expire on January 9, 2020.

Copyright Notice

   Copyright (c) 2019 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Pfister, et al.          Expires January 9, 2020                [Page 1]
Internet-Draft              MLD BIER overlay                   July 2019

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Overview  . . . . . . . . . . . . . . . . . . . . . . . . . .   3
   4.  Applicability Statement . . . . . . . . . . . . . . . . . . .   4
   5.  Querier and Listener Specifications . . . . . . . . . . . . .   4
     5.1.  Configuration Parameters  . . . . . . . . . . . . . . . .   5
     5.2.  MLDv2 instances.  . . . . . . . . . . . . . . . . . . . .   5
       5.2.1.  Sending Queries . . . . . . . . . . . . . . . . . . .   6
       5.2.2.  Sending Reports . . . . . . . . . . . . . . . . . . .   6
       5.2.3.  Receiving Queries . . . . . . . . . . . . . . . . . .   7
       5.2.4.  Receiving Reports . . . . . . . . . . . . . . . . . .   7
     5.3.  Packet Forwarding . . . . . . . . . . . . . . . . . . . .   8
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .   8
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   8
   8.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   8
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   8
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .   8
     9.2.  Informative References  . . . . . . . . . . . . . . . . .   9
   Appendix A.  BIER Use Case in Data Centers  . . . . . . . . . . .  10
     A.1.  Convention and Terminology  . . . . . . . . . . . . . . .  12
     A.2.  BIER in data centers  . . . . . . . . . . . . . . . . . .  12
     A.3.  A BIER MLD solution for Virtual Network information . . .  13
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  14

1.  Introduction

   The Bit Index Explicit Replication (BIER - [RFC8279]) forwarding
   technique enables IP multicast transport across a BIER domain.  When
   receiving or originating a packet, ingress routers have to construct
   a bit mask indicating which BIER egress routers located within the
   same BIER domain will receive the packet.  A stateless approach would
   consist of forwarding all incoming packets toward all egress routers,