Understanding Msdp - Cisco Catalyst 3120 Software Manual

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Configuring MSDP

This chapter describes how to configure the Multicast Source Discovery Protocol (MSDP) on the switch.

The MSDP connects multiple Protocol-Independent Multicast sparse-mode (PIM-SM) domains.

MSDP is not fully supported in this software release because of a lack of support for Multicast Border

Gateway Protocol (MBGP), which works closely with MSDP. However, it is possible to create default

peers that MSDP can operate with if MBGP is not running.

To use this feature, the switch or stack master must be running the IP services feature set. Unless

otherwise noted, the term switch refers to a standalone switch and to a switch stack.

For complete syntax and usage information for the commands used in this chapter, see the Cisco IOS IP

Command Reference, Volume 3 of 3: Multicast, Release 12.2.

This chapter consists of these sections:

Understanding MSDP

MSDP allows multicast sources for a group to be known to all rendezvous points (RPs) in different

domains. Each PIM-SM domain uses its own RPs and does not depend on RPs in other domains. An RP

runs MSDP over the Transmission Control Protocol (TCP) to discover multicast sources in other

An RP in a PIM-SM domain has an MSDP peering relationship with MSDP-enabled devices in another

domain. The peering relationship occurs over a TCP connection, primarily exchanging a list of sources

sending to multicast groups. The TCP connections between RPs are achieved by the underlying routing

system. The receiving RP uses the source lists to establish a source path.

Understanding MSDP, page 45-1

Configuring MSDP, page 45-4

Monitoring and Maintaining MSDP, page 45-19

C H A P T E R

Cisco Catalyst Blade Switch 3120 for HP Software Configuration Guide

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