Updates to the IPv6 Multicast Addressing Architecture
draft-ietf-6man-multicast-addr-arch-update-00

The information below is for an old version of the document
Document Type Active Internet-Draft (6man WG)
Authors Mohamed Boucadair  , Stig Venaas 
Last updated 2013-04-08
Replaces draft-boucadair-6man-multicast-addr-arch-update
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6man Working Group                                          M. Boucadair
Internet-Draft                                            France Telecom
Updates: 3306,3956,4607,4291 (if approved)                     S. Venaas
Intended status: Standards Track                                   Cisco
Expires: October 10, 2013                                 April 08, 2013

         Updates to the IPv6 Multicast Addressing Architecture
             draft-ietf-6man-multicast-addr-arch-update-00

Abstract

   This document updates the IPv6 multicast addressing architecture by
   defining the 17-20 reserved bits as generic flag bits.  The document
   provides also some clarifications related to the use of these flag
   bits.

   This document updates RFC 3956, RFC 3306, RFC 4607 and RFC 4291.

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 RFC 2119 [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
   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 October 10, 2013.

Copyright Notice

   Copyright (c) 2013 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Boucadair & Venaas      Expires October 10, 2013                [Page 1]
Internet-Draft            Multicast Flag bits                 April 2013

   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
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Addressing Architecture Update  . . . . . . . . . . . . . . .   2
   3.  Clarifications  . . . . . . . . . . . . . . . . . . . . . . .   3
     3.1.  Flag Bits . . . . . . . . . . . . . . . . . . . . . . . .   3
     3.2.  IANA Assigned SSM Block . . . . . . . . . . . . . . . . .   4
   4.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   4
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .   4
   6.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   4
   7.  Normative References  . . . . . . . . . . . . . . . . . . . .   4
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   5

1.  Introduction

   This document updates the IPv6 multicast addressing architecture
   [RFC4291] by defining the 17-20 reserved bits as generic flag bits
   (Section 2).  The document provides also some clarifications related
   to the use of these flag bits (Section 3.1) and also about IANA
   assigned SSM blocks (Section 3.2).

   This document updates [RFC3956], [RFC3306], [RFC4607] and [RFC4291].

2.  Addressing Architecture Update

   Bits 17-20 of a multicast address are defined in [RFC3956] and
   [RFC3306] as reserved bits.  This document defines these bits as
   generic flag bits so that they apply to any multicast address.
   Figure 1 and Figure 2 show the updated structure of the addressing
   architecture.  The first diagram shows the update of the base IPv6
   addressing architecture, and the second shows the update of so-called
   Embedded-RP.

    OLD:
    |   8    |  4 |  4 |                  112 bits                    |
    +--------+----+----+----------------------------------------------+
    |11111111|flgs|scop|                  group ID                    |
    +--------+----+----+----------------------------------------------+

Boucadair & Venaas      Expires October 10, 2013                [Page 2]
Internet-Draft            Multicast Flag bits                 April 2013

    NEW:
    |   8    |  4 |  4 |  4 |             108 bits                    |
    +--------+----+----+----------------------------------------------+
    |11111111|flgs|scop|flgs|             group ID                    |
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