RFC 3488 (rfc3488) - Page 1 of 17

Cisco Systems Router-port Group Management Protocol (RGMP)

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Network Working Group                                              I. Wu
Request for Comments: 3488                                     T. Eckert
Category: Informational                                    Cisco Systems
                                                           February 2003

                             Cisco Systems
              Router-port Group Management Protocol (RGMP)

Status of this Memo

   This memo provides information for the Internet community.  It does
   not specify an Internet standard of any kind.  Distribution of this
   memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (2003).  All Rights Reserved.


   This document describes the Router-port Group Management Protocol
   (RGMP).  This protocol was developed by Cisco Systems and is used
   between multicast routers and switches to restrict multicast packet
   forwarding in switches to those routers where the packets may be

   RGMP is designed for backbone switched networks where multiple, high
   speed routers are interconnected.

1. Conventions used in this document

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   document are to be interpreted as described in BCP 14, RFC 2119 [2].

2. Introduction

   IGMP Snooping is a popular, but not well documented mechanism to
   restrict multicast traffic, in switched networks, to those ports that
   want to receive the multicast traffic.  It dynamically establishes
   and terminates multicast group specific forwarding in switches that
   support this feature.

Wu & Eckert                  Informational

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