Connectivity Guide

Usage
Information
When you run this command on a node, all multicast routes from the PIM tree information base (TIB), the
entire multicast route table, and all the entries in the data plane are deleted.
Example
OS10# clear ip pim vrf vrf1 tib
Supported
Releases
10.4.3.0 or later
ip multicast-routing
Enables IP multicast forwarding.
Syntax
ip multicast-routing [vrf vrf-name]
Parameters vrf vrf-name—Enter the keyword vrf, then the name of the VRF to enable IP multicast forwarding
on the specified VRF.
Default None
Command Mode CONFIGURATION
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
620 Multicast