RFC 3618 (rfc3618) - Page 1 of 19
Multicast Source Discovery Protocol (MSDP)
Alternative Format: Original Text Document
Network Working Group B. Fenner, Ed.
Request for Comments: 3618 D. Meyer, Ed.
Category: Experimental October 2003
Multicast Source Discovery Protocol (MSDP)
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 (2003). All Rights Reserved.
Abstract
The Multicast Source Discovery Protocol (MSDP) describes a mechanism
to connect multiple IP Version 4 Protocol Independent Multicast
Sparse-Mode (PIM-SM) domains together. Each PIM-SM domain uses its
own independent Rendezvous Point (RP) and does not have to depend on
RPs in other domains. This document reflects existing MSDP
implementations.
Table of Contents
1. Introduction. . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . 3
4. Caching . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
5. Timers. . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
5.1. SA-Advertisement-Timer . . . . . . . . . . . . . . . . . 5
5.2. SA-Advertisement-Timer Processing. . . . . . . . . . . . 5
5.3. SA Cache Timeout (SA-State Timer). . . . . . . . . . . . 5
5.4. Peer Hold Timer. . . . . . . . . . . . . . . . . . . . . 5
5.5. KeepAlive Timer. . . . . . . . . . . . . . . . . . . . . 6
5.6. ConnectRetry Timer . . . . . . . . . . . . . . . . . . . 6
6. Intermediate MSDP Peers . . . . . . . . . . . . . . . . . . . 6
7. SA Filtering and Policy . . . . . . . . . . . . . . . . . . . 6
8. Encapsulated Data Packets . . . . . . . . . . . . . . . . . . 7
9. Other Scenarios . . . . . . . . . . . . . . . . . . . . . . . 7
10. MSDP Peer-RPF Forwarding. . . . . . . . . . . . . . . . . . . 7
10.1. Definitions . . . . . . . . . . . . . . . . . . . . . . 7
10.1.1. Multicast RPF Routing Information Base. . . . . 8
10.1.2. Peer-RPF Route. . . . . . . . . . . . . . . . . 8
Fenner & Meyer Experimental