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Anycast Rendevous Point (RP) mechanism using Protocol Independent Multicast (PIM) and Multicast Source Discovery Protocol (MSDP) (RFC3446)

IP.com Disclosure Number: IPCOM000011188D
Original Publication Date: 2003-Jan-01
Included in the Prior Art Database: 2003-Feb-13
Document File: 8 page(s) / 15K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

D. Kim: AUTHOR [+4]

Abstract

This document describes a mechanism to allow for an arbitrary number of Rendevous Points (RPs) per group in a single shared-tree Protocol Independent Multicast-Sparse Mode (PIM-SM) domain.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 19% of the total text.

Network Working Group� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � D. Kim

Request for Comments: 3446� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � Verio

Category: Informational� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � D. Meyer

� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � H. Kilmer

� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � D. Farinacci

� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � Procket Networks

� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � January 2003

� � � � � � � � � � � � Anycast Rendevous Point (RP) mechanism using

� � � � � � � � � � � � � � � � Protocol Independent Multicast (PIM)

� � � � � � � � � � � � and Multicast Source Discovery Protocol (MSDP)

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.

Abstract

� � This document describes a mechanism to allow for an arbitrary number

� � of Rendevous Points (RPs) per group in a single shared-tree Protocol

� � Independent Multicast-Sparse Mode (PIM-SM) domain.

1. Introduction

� � PIM-SM, as defined in RFC 2362, allows for only a single active RP

� � per group, and as such the decision of optimal RP placement can

� � become problematic for a multi-regional network deploying PIM-SM.

� � Anycast RP relaxes an important constraint in PIM-SM, namely, that

� � there can be only one group to RP mapping can be active at any time.

� � The single mapping property has several implications, including

� � traffic concentration, lack of scalable register decapsulation (when

� � using the shared tree), slow convergence when an active RP fails,

� � possible sub-optimal forwarding of multicast packets, and distant RP

� � dependencies.� These properties of PIM-SM have been demonstrated in

� � native continental or inter-continental scale multicast deployments.

� � As a result, it is clear that ISP backbones require a mechanism that

� � allows definition of multiple active RPs per group in a single PIM-SM

� � domain.� Further, any such mechanism should also address the issues

� � addressed above.

Kim, et al.� � � � � � � � � � � � � � � � � Informational� � � � � � � � � � � � � � � � � � � � � [Page 1]

RFC 3446� � � � � � � Anycast RP mechanism using PIM and MSDP� � � � January 2003

� � The mechanism described here is intended to address the need for

� � better fail-over (convergence time) and sharing of the register

� � decapsulation load (again, when using the shared-tree) among RPs in a

�...