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Protocol Independent Multicast - Dense Mode (PIM-DM): Protocol Specification (Revised) (RFC3973)

IP.com Disclosure Number: IPCOM000035491D
Original Publication Date: 2005-Jan-01
Included in the Prior Art Database: 2005-Jan-21

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

A. Adams: AUTHOR [+3]

Abstract

This document specifies Protocol Independent Multicast - Dense Mode (PIM-DM). PIM-DM is a multicast routing protocol that uses the underlying unicast routing information base to flood multicast datagrams to all multicast routers. Prune messages are used to prevent future messages from propagating to routers without group membership information.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 2% of the total text.

Network Working Group                                           A. Adams

Request for Comments: 3973                          NextHop Technologies

Category: Experimental                                       J. Nicholas

                                                                ITT A/CD

                                                               W. Siadak

                                                    NextHop Technologies

                                                            January 2005

         Protocol Independent Multicast - Dense Mode (PIM-DM):

                    Protocol Specification (Revised)

Status of This Memo

   This memo defines an Experimental Protocol for the Internet

   community.  It does not specify an Internet standard of any kind.

   Discussion and suggestions for improvement are requested.

   Distribution of this memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (2005).

Abstract

   This document specifies Protocol Independent Multicast - Dense Mode

   (PIM-DM).  PIM-DM is a multicast routing protocol that uses the

   underlying unicast routing information base to flood multicast

   datagrams to all multicast routers.  Prune messages are used to

   prevent future messages from propagating to routers without group

   membership information.

Adams, et al.                 Experimental                      [Page 1]

RFC 3973                   PIM - Dense Mode                 January 2005

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  4

   2.  Terminology  . . . . . . . . . . . . . . . . . . . . . . . . .  4

       2.1.  Definitions  . . . . . . . . . . . . . . . . . . . . . .  4

       2.2.  Pseudocode Notation  . . . . . . . . . . . . . . . . . .  5

   3.  PIM-DM Protocol Overview . . . . . . . . . . . . . . . . . . .  5

   4.  Protocol Specification . . . . . . . . . . . . . . . . . . . .  6

       4.1.  PIM Protocol State . . . . . . . . . . . . . . . . . . .  7

             4.1.1.  General Purpose State  . . . . . . . . . . . . .  7

             4.1.2.  (S,G) State  . . . . . . . . . . . . . . . . . .  8

             4.1.3.  State Summarization Macros . . . . . . . . . . .  8

       4.2.  Data Packet Forwarding Rules . . . . . . . . . . . . . . 10

       4.3.  Hello Messages . . . . . . . . . . . . . . . . . . . . . 11

             4.3.1.  Sending Hello Messages . . . . . . ....