4000 Router Series IP Multicast Configuration Guide

PIM-SSM configuration task list

Task Remarks

Enabling PIM-SM Required.

Configuring the SSM group range Optional.

Configuring common PIM features Optional.

Configuration prerequisites

Before you configure PIM-SSM, configure a unicast routing protocol so that all devices in the domain are

interoperable at the network layer.

Enabling PIM-SM

The implementation of the SSM model is based on subsets of PIM-SM. Therefore, you must enable

PIM-SM before configuring PIM-SSM.

When you deploy a PIM-SSM domain, enable PIM-SM on non-border interfaces of the routers.

IMPORTANT:

ll the interfaces on a device must be enabled with the same PIM mode.

To enable PIM-SM:

Ste

Command Remarks

1. Enter system view.

system-view N/A

2. Enable IP multicast routing,

and enter MRIB view.

multicast routing [ vpn-instance

vpn-instance-name ]

By default, IP multicast routing is

disabled.

3. Return to system view.

quit N/A

4. Enter interface view.

interface interface-type

interface-number

N/A

5. Enable PIM-SM.

pim sm By default, PIM-SM is disabled.

Configuring the SSM group range

When a PIM-SM enabled interface receives a multicast packet, it checks whether the multicast group

address of the packet is in the SSM group range. If the multicast group address is in this range, the PIM

mode for this packet is PIM-SSM. If the multicast group address is not in this range, the PIM mode is

PIM-SM.

Configuration guidelines

• Perform the following configuration on all routers in the PIM-SSM domain.

• Make sure the same SSM group range is configured on all routers in the entire domain. Otherwise,

multicast information cannot be delivered through the SSM model.