IGMPv3/MLDv2 Message Extension
draft-ietf-pim-igmp-mld-extension-04

Document Type Active Internet-Draft (pim WG)
Authors Mahesh Sivakumar  , Stig Venaas  , Zheng Zhang  , Hitoshi Asaeda 
Last updated 2021-01-29 (latest revision 2021-01-21)
Stream IETF
Intended RFC status Proposed Standard
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Document shepherd Mike McBride
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Send notices to mmcbride7@gmail.com
Network Working Group                                       M. Sivakumar
Internet-Draft                                          Juniper Networks
Updates: 3376, 3810 (if approved)                              S. Venaas
Intended status: Standards Track                     Cisco Systems, Inc.
Expires: July 25, 2021                                          Z. Zhang
                                                         ZTE Corporation
                                                               H. Asaeda
                                                                    NICT
                                                        January 21, 2021

                     IGMPv3/MLDv2 Message Extension
                  draft-ietf-pim-igmp-mld-extension-04

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, using a list of TLVs (Type, Length and
   Value).

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 July 25, 2021.

Copyright Notice

   Copyright (c) 2021 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

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   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
   2.  Conventions used in this document . . . . . . . . . . . . . .   3
   3.  Extension Format  . . . . . . . . . . . . . . . . . . . . . .   3
     3.1.  Multicast Listener Query Extension  . . . . . . . . . . .   4
     3.2.  Version 2 Multicast Listener Report Extension . . . . . .   5
     3.3.  IGMP Membership Query Extension . . . . . . . . . . . . .   6
     3.4.  IGMP Version 3 Membership Report Extension  . . . . . . .   7
   4.  Processing the extension  . . . . . . . . . . . . . . . . . .   8
   5.  Applicability and backwards compatibility . . . . . . . . . .   9
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .  10
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  10
   8.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  10
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  11
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .  11
     9.2.  Informative References  . . . . . . . . . . . . . . . . .  11
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  11

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 allowing a list of TLVs (Type, Length and Value) to be used
   in the Additional Data part of IGMPv3 and MLDv2 messages.  This
   document defines a registry for such TLVs, while other documents will
   define the specific types and their values, and their semantics.  The
   extension would only be used when at least one TLV is to be added to
   the message.  This extension also applies to the lightweight versions
   of IGMPv3 and MLDv2 as defined in [RFC5790].

   When this extension mechanism is used, it replaces the Additional
   Data section defined in IGMPv3/MLDv2 for TLVs.

   Additional Data is defined for query messages in IGMPv3 [RFC3376]
   Section 4.1.10 and MLDv2 [RFC3810] Section 5.1.12, and for report
   messages in IGMPv3 [RFC3376] Section 4.2.11 and MLDv2 [RFC3810]
   Section 5.2.11.

   One such TLV is being defined for use in BIER IGMP/MLD overlays
   [I-D.ietf-bier-mld].  This TLV provides BIER specific information
   that only will be processed by BIER routers.

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