Softwire Mesh Multicast
draft-ietf-softwire-mesh-multicast-13

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Last updated 2016-07-05 (latest revision 2016-05-23)
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Softwire WG                                                        M. Xu
Internet-Draft                                                    Y. Cui
Intended status: Standards Track                                   J. Wu
Expires: November 23, 2016                                       S. Yang
                                                     Tsinghua University
                                                                 C. Metz
                                                             G. Shepherd
                                                           Cisco Systems
                                                            May 22, 2016

                        Softwire Mesh Multicast
                 draft-ietf-softwire-mesh-multicast-13

Abstract

   The Internet needs to support IPv4 and IPv6 packets.  Both address
   families and their related protocol suites support multicast of the
   single-source and any-source varieties.  During IPv6 transition,
   there will be scenarios where a backbone network running one IP
   address family internally (referred to as internal IP or I-IP) will
   provide transit services to attached client networks running another
   IP address family (referred to as external IP or E-IP).  It is
   expected that the I-IP backbone will offer unicast and multicast
   transit services to the client E-IP networks.

   Softwire Mesh is a solution to E-IP unicast and multicast support
   across an I-IP backbone.  This document describes the mechanism for
   supporting Internet-style multicast across a set of E-IP and I-IP
   networks supporting softwire mesh.

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
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   Drafts is at http://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 November 23, 2016.

Xu, et al.              Expires November 23, 2016               [Page 1]
Internet-Draft           softwire mesh multicast                May 2016

Copyright Notice

   Copyright (c) 2016 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
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Requirements Language . . . . . . . . . . . . . . . . . .   4
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Scenarios of Interest . . . . . . . . . . . . . . . . . . . .   6
     3.1.  IPv4-over-IPv6  . . . . . . . . . . . . . . . . . . . . .   6
     3.2.  IPv6-over-IPv4  . . . . . . . . . . . . . . . . . . . . .   7
   4.  IPv4-over-IPv6 Mechanism  . . . . . . . . . . . . . . . . . .   9
     4.1.  Mechanism Overview  . . . . . . . . . . . . . . . . . . .   9
     4.2.  Group Address Mapping . . . . . . . . . . . . . . . . . .   9
     4.3.  Source Address Mapping  . . . . . . . . . . . . . . . . .  10
     4.4.  Routing Mechanism . . . . . . . . . . . . . . . . . . . .  11
   5.  IPv6-over-IPv4 Mechanism  . . . . . . . . . . . . . . . . . .  12
     5.1.  Mechanism Overview  . . . . . . . . . . . . . . . . . . .  12
     5.2.  Group Address Mapping . . . . . . . . . . . . . . . . . .  12
     5.3.  Source Address Mapping  . . . . . . . . . . . . . . . . .  12
     5.4.  Routing Mechanism . . . . . . . . . . . . . . . . . . . .  13
   6.  Control Plane Functions of AFBR . . . . . . . . . . . . . . .  14
     6.1.  E-IP (*,G) State Maintenance  . . . . . . . . . . . . . .  14
     6.2.  E-IP (S,G) State Maintenance  . . . . . . . . . . . . . .  14
     6.3.  I-IP (S',G') State Maintenance  . . . . . . . . . . . . .  14
     6.4.  E-IP (S,G,rpt) State Maintenance  . . . . . . . . . . . .  15
     6.5.  Inter-AFBR Signaling  . . . . . . . . . . . . . . . . . .  15
     6.6.  SPT Switchover  . . . . . . . . . . . . . . . . . . . . .  17
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