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Delivery of IPv4 Multicast Services to IPv4 Clients over an IPv6 Multicast Network
draft-ietf-softwire-dslite-multicast-08

Document type: Active Internet-Draft (softwire WG)
Document stream: IETF
Last updated: 2014-09-15
Intended RFC status: Unknown
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IETF State: WG Document
Document shepherd: No shepherd assigned

IESG State: I-D Exists
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Softwire WG                                                       J. Qin
Internet-Draft                                                     Cisco
Intended status: Standards Track                            M. Boucadair
Expires: March 19, 2015                                     C. Jacquenet
                                                          France Telecom
                                                                  Y. Lee
                                                                 Comcast
                                                                 Q. Wang
                                                           China Telecom
                                                      September 15, 2014

    Delivery of IPv4 Multicast Services to IPv4 Clients over an IPv6
                           Multicast Network
                draft-ietf-softwire-dslite-multicast-08

Abstract

   This document specifies a solution for the delivery of IPv4 multicast
   services to IPv4 clients over an IPv6 multicast network.  The
   solution relies upon a stateless IPv4-in-IPv6 encapsulation scheme
   and uses the IPv6 multicast distribution tree to deliver IPv4
   multicast traffic.  The solution is particularly useful for the
   delivery of multicast service offerings to DS-Lite serviced
   customers.

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 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 March 19, 2015.

Copyright Notice

   Copyright (c) 2014 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Qin, et al.              Expires March 19, 2015                 [Page 1]
Internet-Draft          IPv4 over IPv6 Multicast          September 2014

   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  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Requirements Language . . . . . . . . . . . . . . . . . .   4
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . .   5
   4.  Solution Overview . . . . . . . . . . . . . . . . . . . . . .   5
     4.1.  IPv4-Embedded IPv6 Prefixes . . . . . . . . . . . . . . .   6
     4.2.  Multicast Distribution Tree Computation . . . . . . . . .   7
     4.3.  Multicast Data Forwarding . . . . . . . . . . . . . . . .   8
   5.  Address Mapping . . . . . . . . . . . . . . . . . . . . . . .   8
     5.1.  Prefix Assignment . . . . . . . . . . . . . . . . . . . .   8
     5.2.  Address Translation Algorithm . . . . . . . . . . . . . .   9
     5.3.  Textual Representation  . . . . . . . . . . . . . . . . .   9
     5.4.  Examples  . . . . . . . . . . . . . . . . . . . . . . . .   9
   6.  Multicast B4 (mB4)  . . . . . . . . . . . . . . . . . . . . .  10
     6.1.  IGMP-MLD Interworking Function  . . . . . . . . . . . . .  10
     6.2.  Multicast Data Forwarding . . . . . . . . . . . . . . . .  10
     6.3.  Fragmentation . . . . . . . . . . . . . . . . . . . . . .  11
     6.4.  Host built-in mB4 Function  . . . . . . . . . . . . . . .  11
     6.5.  Preserve the Scope  . . . . . . . . . . . . . . . . . . .  11
   7.  Multicast AFTR (mAFTR)  . . . . . . . . . . . . . . . . . . .  11
     7.1.  Routing Considerations  . . . . . . . . . . . . . . . . .  11
     7.2.  Processing PIM Message  . . . . . . . . . . . . . . . . .  12
     7.3.  Switching from Shared Tree to Shortest Path Tree  . . . .  13
     7.4.  Multicast Data Forwarding . . . . . . . . . . . . . . . .  13
     7.5.  TTL/Scope . . . . . . . . . . . . . . . . . . . . . . . .  13
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .  14
     8.1.  Firewall Configuration  . . . . . . . . . . . . . . . . .  14

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