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Protocol Independent Multicast-Sparse Mode (PIM-SM): Protocol Specification (RFC2117)

IP.com Disclosure Number: IPCOM000002670D
Original Publication Date: 1997-Jun-01
Included in the Prior Art Database: 2000-Sep-13

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

D. Estrin: AUTHOR [+10]

Abstract

This document describes a protocol for efficiently routing to multicast groups that may span wide-area (and inter-domain) internets. We refer to the approach as Protocol Independent Multicast--Sparse Mode (PIM-SM) because it is not dependent on any particular unicast routing protocol, and because it is designed to support sparse groups as defined in [1][2]. This document describes the protocol details. For the motivation behind the design and a description of the architecture, see [1][2]. Section 2 summarizes PIM-SM operation. It describes the protocol from a network perspective, in particular, how the participating routers interact to create and maintain the multicast distribution tree. Section 3 describes PIM-SM operations from the perspective of a single router implementing the protocol; this section constitutes the main body of the protocol specification. It is organized according to PIM-SM message type; for each message type we describe its contents, its generation, and its processing.

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Network Working Group D. Estrin

Request for Comments: 2117 USC

Category: Experimental D. Farinacci

CISCO

A. Helmy

USC

D. Thaler

UMICH

S. Deering

XEROX

M. Handley

UCL

V. Jacobson

LBL

C. Liu

USC

P. Sharma

USC

L. Wei

CISCO

June 1997

Protocol Independent Multicast-Sparse Mode (PIM-SM): Protocol

Specification

Status of This Memo

This memo defines an Experimental Protocol for the Internet

community. This memo does not specify an Internet standard of any

kind. Discussion and suggestions for improvement are requested.

Distribution of this memo is unlimited.

Acknowledgements

The author list has been reordered to reflect the involvement in

detailed editorial work on this specification document. The first

four authors are the primary editors and are listed alphabetically.

The rest of the authors, also listed alphabetically, participated in

all aspects of the architectural and detailed design but managed to

get away without hacking the latex!

1 Introduction

This document describes a protocol for efficiently routing to

multicast groups that may span wide-area (and inter-domain)

internets. We refer to the approach as Protocol Independent

Multicast--Sparse Mode (PIM-SM) because it is not dependent on any

particular unicast routing protocol, and because it is designed to

support sparse groups as defined in [1][2]. This document describes

the protocol details. For the motivation behind the design and a

description of the architecture, see [1][2]. Section 2 summarizes

PIM-SM operation. It describes the protocol from a network

perspective, in particular, how the participating routers interact to

create and maintain the multicast distribution tree. Section 3

describes PI...