Connectivity Guide

Usage Information
After you enable IP multicast, enable IGMP and PIM on an interface. To do this, use the ip pim sparse-mode
command in INTERFACE mode. The no form of the command disables IP multicast forwarding.
Example
OS10# configure terminal
OS10(config)# ip multicast-routing
Supported Releases 10.4.3.0 or later
ip pim dr-priority
Changes the designated router (DR) priority for the interface.
Syntax
ip pim dr-priority priority-value
Parameters priority-value—Enter a number from 0 to 4294967295.
Default 1
Command Mode INTERFACE CONFIGURATION
Usage Information
The router with the largest value assigned to an interface becomes the DR. If two interfaces have the same DR
priority value, the interface with the largest IP address becomes the DR.
Use the no form of the command to remove the DR priority value assigned to an interface.
Example
OS10# configure terminal
OS10(config)# interface vlan 1
OS10(conf-if-vl-1)# ip pim dr-priority 200
Supported Releases 10.4.3.0 or later
ip pim query-interval
Changes the frequency of PIM router query messages.
Syntax
ip pim query-interval seconds
Parameters seconds—Enter the amount of time, in seconds, the router waits before sending a PIM hello packet out of each
PIM-enabled interface, from 2 to 18000.
Default 30 seconds
Command Mode INTERFACE CONFIGURATION
Usage Information Use the no form of the command to return the frequency of PIM router query messages to the default value.
Example
OS10# configure terminal
OS10(config)# interface vlan 1
OS10(conf-if-vl-1)# ip pim query-interval 20
Supported Releases 10.4.3.0 or later
648 Multicast