To Next Page

To Previous Page

211

Configuring MSDP (available only on the

S5500-EI)

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 (available only on the

500-EI)."

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

The term "interface" in this chapter collectively refers to Layer 3 interfaces, including VLAN interfaces

and Layer 3 Ethernet interfaces. You can set an Ethernet port as a Layer 3 interface by using the port

link-mode route command (see Layer 2—LAN Switching Configuration Guide).

H3C S5500-EI User Manual

Questions and Answers: