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

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Last updated 2019-11-04
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Network Working Group                                       M. Sivakumar
Internet-Draft                                          Juniper Networks
Intended status: Standards Track                               S. Venaas
Expires: May 7, 2020                                 Cisco Systems, Inc.
                                                                Z. Zhang
                                                         ZTE Corporation
                                                        November 4, 2019

                     IGMPv3/MLDv2 Message Extension
                 draft-venaas-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.  This document also defines an
   extension for use with IGMP and MLD over BIER, that allows for
   identifying the sender.  This will in turn enable MLD (resp.  IGMP)
   to be used in the BIER multicast flow overlay.

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
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   This Internet-Draft will expire on May 7, 2020.

Copyright Notice

   Copyright (c) 2019 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

Sivakumar, et al.          Expires May 7, 2020                  [Page 1]
Internet-Draft       IGMPv3/MLDv2 message extension        November 2019

   carefully, as they describe your rights and restrictions with respect
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   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.  Proposed MLD/IGMP Extension . . . . . . . . . . . . . . . . .   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.  Security Considerations . . . . . . . . . . . . . . . . . . .   8
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   8
   6.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   9
     6.1.  Normative References  . . . . . . . . . . . . . . . . . .   9
     6.2.  Informative References  . . . . . . . . . . . . . . . . .   9
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   9

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.

   Bit Index Explicit Replication (BIER [RFC8279]) defines a new
   architecture for optimal forwarding of multicast packets through a
   multicast domain without requiring a protocol for explicitly bulding
   multicast distribution trees while obviating the need for
   intermediate nodes to maintain any per-flow state.  Forwarding in the
   BIER network is accomplished by having ingress routers construct a
   bit mask indicating the set of egress routers in the BIER domain
   interested in receiving the packet.

   New technologies (such as BIER) can use MLD (resp.  IGMP) as an
   overlay protocol, in order to collect the ingress and egress nodes
   for multicast flows in a multicast domain (such as a BIER domain)
   [I-D.ietf-bier-mld].  That draft makes use of an extension to IGMP/
   MLD, defined in this document, to have additional info identifying
   the BIER sender of the message.  This allows the IGMP/MLD overlay to
   know exactly who is interested in receiving flows.  It can
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