Configuration Guide User guide

1476 FastIron Configuration Guide

53-1002494-02

PIM SM snooping configuration

Configuring PIM SM snooping on a Brocade device consists of the following global and

VLAN-specific tasks.

Global PIM SM snooping task

Perform the following global tasks:

• “Enabling or disabling PIM SM snooping”

VLAN-specific PIM SM snooping tasks

Perform the following VLAN-specific tasks:

• “Enabling PIM SM snooping on a VLAN”

• “Disabling PIM SM snooping on a VLAN”

Enabling or disabling PIM SM snooping

Use PIM SM snooping only in topologies where multiple PIM sparse routers connect through a

device. PIM SM snooping does not work on a PIM dense mode router which does not send join

messages and traffic to PIM dense ports is stopped. A PIM SM snooping-enabled device displays a

warning if it receives PIM dense join or prune messages.

To enable PIM sparse snooping globally, enter the ip pimsm-snooping command.

Brocade(config)# ip pimsm-snooping

This command enables PIM SM traffic snooping. The PIM SM traffic snooping feature assumes that

the network has routers that are running PIM SM.

NOTE

The device must be in passive mode before it can be configured for PIM SM snooping.

To disable the feature, enter the no ip pimsm-snooping command.

Brocade(config)# no ip pimsm-snooping

If you also want to disable IP multicast traffic reduction, enter the no ip multicast command.

Brocade(config)# no ip multicast

Syntax: [no]ip pimsm-snooping

Enabling PIM SM snooping on a VLAN

You can enable PIM SM snooping for a specific VLAN. For example, the following commands enable

PIM SM snooping on VLAN 20.

Brocade(config)# vlan 20

Brocade(config-vlan-20)# multicast pimsm-snooping

Syntax: [no] multicast pimsm-snooping