IGMPv3/MLDv2 Message Extension
draft-ietf-pim-igmp-mld-extension-00

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Last updated 2020-04-08
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Network Working Group                                       M. Sivakumar
Internet-Draft                                          Juniper Networks
Intended status: Standards Track                               S. Venaas
Expires: October 10, 2020                            Cisco Systems, Inc.
                                                                Z. Zhang
                                                         ZTE Corporation
                                                           April 8, 2020

                     IGMPv3/MLDv2 Message Extension
                  draft-ietf-pim-igmp-mld-extension-00

Abstract

   IGMP and MLD protocols are extensible, but no extensions have been
   defined so far.  This document provides a well-defined way of
   extending IGMP and MLD, including a new extension type to distinguish
   between different extensions.

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 https://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, 2020.

Copyright Notice

   Copyright (c) 2020 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
   (https://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

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   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Conventions used in this document . . . . . . . . . . . . . .   2
   3.  Multicast Listener Query Extension  . . . . . . . . . . . . .   2
   4.  Version 2 Multicast Listener Report Extension . . . . . . . .   4
   5.  IGMP Membership Query Extension . . . . . . . . . . . . . . .   4
   6.  IGMP Version 3 Membership Report Extension  . . . . . . . . .   5
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .   6
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   6
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   7
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .   7
     9.2.  Informative References  . . . . . . . . . . . . . . . . .   7
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   7

1.  Introduction

   In this document, we describe a generic method to extend IGMPv3
   [RFC3376] and MLDv2 [RFC3810] messages to accommodate information
   other than what is contained in the current message formats.  This is
   done by introducing an extension-type field in the message formats to
   indicate the application for which the extension is done.  This will
   be followed by the actual value of the extension.

   The extension will be part of additional data as mentioned in
   [RFC3810] Section 5.1.12 (resp.  [RFC3376] Section 4.1.10) for query
   messages and [RFC3810] Section 5.2.12 (resp.  [RFC3376]
   Section 4.2.11) for report messages.

   One such extension is being defined in [I-D.ietf-bier-mld]

2.  Conventions used in this document

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
   "OPTIONAL" in this document are to be interpreted as described in BCP
   14 [RFC2119] [RFC8174] when, and only when, they appear in all
   capitals, as shown here.

3.  Multicast Listener Query Extension

   The MLD query format with extension is shown below

        0                   1                   2                   3

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        0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
       |  Type = 130   |      Code     |           Checksum            |
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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