Users Guide

Layer 3 Routing Commands 1616
IP multicast must be enabled for PIM to operate. ip multicast-routing is not
disabled or enabled by this command.
It is recommended that IGMP snooping be disabled if IP multicast is enabled
unless specifically required.
PIM is not compatible with DVMRP. DVMRP must be disabled before
enabling PIM.
Example
console(config)#ip pim sparse-mode
ip pim ssm
Use the ip pim ssm command in Global Configuration mode to
administratively configure PIM source specific multicast range of addresses
for IP multicast routing. Use the no form of this command to remove
configured ranges of addresses from the router.
Syntax
ip pim ssm {default | group-address group-mask}
no ip pim ssm {default | group-address group-mask}
• default—Defines the SSM range access list to 232/8.
• group-address—An IP multicast group address.
• group-mask—An IPv4 mask in a.b.c.d form where a, b, c and d range from
0-255.
Default Configuration
There are no group addresses configured by default.
Command Mode
Global Configuration mode
User Guidelines
There are no user guidelines for this command.