Name: Cisco Catalyst 3750-E
Brand: Cisco
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46-26

Catalyst 3750-E and 3560-E Switch Software Configuration Guide

OL-9775-08

Chapter 46 Configuring IP Multicast Routing

Configuring IP Multicast Routing

These sections describe how to configure Auto-RP:

• Setting up Auto-RP in a New Internetwork, page 46-26 (optional)

• Adding Auto-RP to an Existing Sparse-Mode Cloud, page 46-26 (optional)

• Preventing Join Messages to False RPs, page 46-28 (optional)

• Filtering Incoming RP Announcement Messages, page 46-28 (optional)

For overview information, see the “

Auto-RP” section on page 46-7.

Setting up Auto-RP in a New Internetwork

If you are setting up Auto-RP in a new internetwork, you do not need a default RP because you configure

all the interfaces for sparse-dense mode. Follow the process described in the “Adding Auto-RP to an

Existing Sparse-Mode Cloud” section on page 46-26. However, omit Step 3 if you want to configure a

PIM router as the RP for the local group.

Adding Auto-RP to an Existing Sparse-Mode Cloud

This section contains some suggestions for the initial deployment of Auto-RP into an existing

sparse-mode cloud to minimize disruption of the existing multicast infrastructure.

Beginning in privileged EXEC mode, follow these steps to deploy Auto-RP in an existing sparse-mode

oud. This procedure is optional.

Command Purpose

Step 1

show running-config Verify that a default RP is already configured on all PIM devices and the

RP in the sparse-mode network. It was previously configured with the ip

pim rp-address global configuration command.

This step is not required for spare-dense-mode environments.

The selected RP should have good connectivity and be available across

he network. Use this RP for the global groups (for example 224.x.x.x

and other global groups). Do not reconfigure the group address range that

this RP serves. RPs dynamically discovered through Auto-RP take

precedence over statically configured RPs. Assume that it is desirable to

use a second RP for the local groups.

Step 1

Step 2

configure terminal Enter global configuration mode.

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