Specifications

Configuring IP Multicast Multilayer Switching

Configuring and Monitoring IP Multicast MLS

For examples of IP multicast MLS configurations, see the “IP Multicast MLS Configuration Examples”

section later in this document.

Enabling IP Multicast Routing

You must enable IP multicast routing globally on the MMLS-RPs before you can enable IP multicast

MLS on router interfaces. To enable IP multicast routing on the router, use the following command in

router configuration mode:

Note This section describes only how to enable IP multicast routing on the router. For detailed IP multicast

configuration information, refer to the “Configuring IP Multicast Routing” chapter in the Cisco IOS IP

Routing Configuration Guide.

Enabling IP PIM

You must enable PIM on the router interfaces connected to the switch before IP multicast MLS will

function on those router interfaces. To do so, use the following commands beginning in interface

configuration mode:

Note This section describes only how to enable PIM on router interfaces. For detailed PIM configuration

information, refer to the “Configuring IP Multicast Routing” chapter in the Cisco IOS IP Routing

Configuration Guide.

Enabling IP Multicast MLS

IP multicast MLS is enabled by default when you enable PIM on the interface. Perform this task only if

you disabled IP multicast MLS and you want to reenable it. To enable IP multicast MLS on an interface,

use the following command in interface configuration mode:

Command Purpose

Router(config)# ip multicast-routing

Enables IP multicast routing globally.

Command Purpose

Step 1

Router(config)# interface type number

Configures an interface.

Step 2

Router(config-if)# ip pim {dense-mode | sparse-mode

| sparse-dense-mode}

Enables PIM on the interface.

Command Purpose

Router(config-if)# mls rp ip multicast

Enables IP multicast MLS on an interface.