IGP Multicast Architecture
draft-yong-pim-igp-multicast-arch-00

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Network Working Group                                            L. Yong
Internet-Draft                                                  D. Cheng
Intended status: Standards Track                                  W. Hao
Expires: September 5, 2015                                   D. Eastlake
                                                Huawei Technologies Ltd.
                                                                   A. Qu
                                                                MediaTek
                                                               J. Hudson
                                                                 Brocade
                                                             U. Chunduri
                                                           Ericsson Inc.
                                                           March 4, 2015

                       IGP Multicast Architecture
                  draft-yong-pim-igp-multicast-arch-00

Abstract

   This document specifies the architecture of IP multicast routing
   using an Interior Gateway Protocol (IGP).

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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   Internet-Drafts are draft documents valid for a maximum of six months
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   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 September 5, 2015.

Yong, et al.            Expires September 5, 2015               [Page 1]
Internet-Draft         IGP Multicast Architecture             March 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
   to this document.  Code Components extracted from this document must
   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  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Overview  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.2.  Motivation  . . . . . . . . . . . . . . . . . . . . . . .   3
     1.3.  Conventions used in this Document . . . . . . . . . . . .   4
     1.4.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   4
   2.  An Overview of IGP  . . . . . . . . . . . . . . . . . . . . .   5
   3.  Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . .   6
   4.  Routing IP Multicast Packets  . . . . . . . . . . . . . . . .   6
     4.1.  Multicast Distribution Tree . . . . . . . . . . . . . . .   7
       4.1.1.  Bidirectional Distribution Tree . . . . . . . . . . .   8
     4.2.  Advertising Multicast Group Membership  . . . . . . . . .   9
     4.3.  Requirements of Edge Routers  . . . . . . . . . . . . . .   9
     4.4.  Intra-Area Multicast Routing  . . . . . . . . . . . . . .  10
     4.5.  Inter-Area Multicast Routing  . . . . . . . . . . . . . .  11
       4.5.1.  Behavior of IS-IS L2 Router . . . . . . . . . . . . .  11
       4.5.2.  Behavior of OSPF ABR  . . . . . . . . . . . . . . . .  11
     4.6.  Heterogeneous Environment . . . . . . . . . . . . . . . .  11
     4.7.  TE (Traffic Engineering) Support  . . . . . . . . . . . .  12
     4.8.  Applications with Overlay Model . . . . . . . . . . . . .  12
     4.9.  IPv4 and IPv6 . . . . . . . . . . . . . . . . . . . . . .  12
   5.  Acknowledgement . . . . . . . . . . . . . . . . . . . . . . .  13
   6.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  13
     6.1.  Normative References  . . . . . . . . . . . . . . . . . .  13
     6.2.  Informative References  . . . . . . . . . . . . . . . . .  13
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  14

1.  Introduction

Yong, et al.            Expires September 5, 2015               [Page 2]
Internet-Draft         IGP Multicast Architecture             March 2015

1.1.  Overview

   In an IP network, IGP is used to route and forward IP unicast
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