RFC 3376 (rfc3376) - Page 1 of 53

Internet Group Management Protocol, Version 3

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Network Working Group                                            B. Cain
Request for Comments: 3376                               Cereva Networks
Obsoletes: 2236                                               S. Deering
Category: Standards Track                                    I. Kouvelas
                                                           Cisco Systems
                                                               B. Fenner
                                                    AT&T Labs - Research
                                                          A. Thyagarajan
                                                                Ericsson
                                                            October 2002


             Internet Group Management Protocol, Version 3

Status of this Memo

   This document specifies an Internet standards track protocol for the
   Internet community, and requests discussion and suggestions for
   improvements.  Please refer to the current edition of the "Internet
   Official Protocol Standards" (STD 1) for the standardization state
   and status of this protocol.  Distribution of this memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (2002).  All Rights Reserved.

Abstract

   This document specifies Version 3 of the Internet Group Management
   Protocol, IGMPv3.  IGMP is the protocol used by IPv4 systems to
   report their IP multicast group memberships to neighboring multicast
   routers.  Version 3 of IGMP adds support for "source filtering", that
   is, the ability for a system to report interest in receiving packets
   *only* from specific source addresses, or from *all but* specific
   source addresses, sent to a particular multicast address.  That
   information may be used by multicast routing protocols to avoid
   delivering multicast packets from specific sources to networks where
   there are no interested receivers.

   This document obsoletes RFC 2236.











Cain, et. al.               Standards Track
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