KB.15.15

2 PIM-DM (Dense Mode)

For introductory and general information, see the sections beginning with “About PIM-DM”

(page 55).

Overview

This chapter describes protocol-independent multicast (PIM) routing operation on the switches

covered in this guide and how to configure it with the switch's built-in interfaces. It is assumed that

you have an understanding of multimedia traffic control with IP multicast (IGMP).

Global and PIM configuration contexts

NOTE: PIM-DM operation requires a routing protocol enabled on the routing switch. You can

use RIP, OSPF, and/or static routing. The examples in this section use RIP.

Enabling or disabling IP multicast routing

Syntax:

[no] ip multicast-routing

Enables or disables IP multicast routing on the routing switch. IP routing must be

enabled.

Default: Disabled

Enabling or disabling PIM at the global level; placing the CLI in the PIM context

Syntax:

[no] router pim

Enables or disables PIM at the global level and places the CLI in the PIM context.

IP routing must first be enabled.

Default: Disabled.

Setting the interval in seconds between successive state-refresh messages originated

by the routing switch

Syntax:

router pim state-refresh [10-300]

Executed in the PIM context, this command sets the interval in seconds between

successive state-refresh messages originated by the routing switch. Only the routing

switch connected directly to the unicast source initiates state-refresh packets. All

other PIM routers in the network only propagate these state-refresh packets.

Default: 60 seconds

Enabling and disabling PIM SNMP traps

Syntax:

[no]router pim trap [[all] | neighbor-loss | hardware-mrt-full

| software-mrt-full ]

Executed in the PIM context, this command enables and disables these PIM SNMP

traps:

Overview 37