To Next Page

To Previous Page

155

Configuring MSDP

Overview

Multicast source discovery protocol (MSDP) is an inter-domain multicast solution that addresses the

interconnection of protocol independent multicast sparse mode (PIM-SM) domains. You can use it to

discover multicast source information in other PIM-SM domains.

In the basic PIM-SM mode, a multicast source registers only with the RP in the local PIM-SM domain, and

the multicast source information about a domain is isolated from that of another domain. As a result, the

RP obtains the source information only within the local domain, and a multicast distribution tree is built

only within the local domain to deliver multicast data from a local multicast source to local receivers.

MSDP enables the RPs of different PIM-SM domains to share their multicast source information, so that the

local RP can join multicast sources in other domains, and multicast data can be transmitted among

different domains.

With MSDP peer relationship established between appropriate routers in the network, the RPs of different

PIM-SM domains are interconnected with one another. These MSDP peers exchange source active (SA)

messages, so that the multicast source information is shared among these different domains.

NOTE:

• MSDP is applicable only if the intra-domain multicast protocol is PIM-SM.

• MSDP is meaningful only for the any-source multicast (ASM) model.

For more information about the concepts of designated router (DR), bootstrap router (BSR),

candidate-BSR (C-BSR), rendezvous point (RP), candidate-RP (C-RP), shortest path tree (SPT) and

rendezvous point tree (RPT) mentioned in this document, see "Configuring PIM."

he term "router" in this document refers to both routers and Layer 3 switches.

How MSDP works

MSDP peers

Configuring one or more pairs of MSDP peers in the network forms an MSDP interconnection map,

where the RPs of different PIM-SM domains are interconnected in series. An SA message that an RP sends

and that these MSDP peers relay can be delivered to all other RPs.

HP 6125G Configuration Guide

Other manuals for HP 6125G