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Catalyst 2950 and Catalyst 2955 Switch Command Reference
OL-10102-01
Chapter 2 Catalyst 2950 and 2955 Cisco IOS Commands
ip igmp snooping mrouter learn pim v2
ip igmp snooping mrouter learn pim v2
Use the ip igmp snooping mrouter learn pim v2 global configuration command to enable multicast
router detection by Protocol-Independent Multicast protocol version 2 (PIMv2) packets when Internet
Group Management Protocol (IGMP) snooping is enabled. Use the no form of this command to disable
multicast router detection by PIMv2 packets.
ip igmp snooping mrouter learn pim v2
no ip igmp snooping mrouter learn pim v2
Syntax Description This command has no arguments or keywords.
Defaults Multicast router discovery using PIMv2 packets is enabled.
Command Modes Global configuration
Command History
Usage Guidelines When IGMP snooping is globally enabled, PIMv2 packets and IGMP query packets are used for
multicast router discovery and sent to the switch CPU. This is the default condition. Use the no ip igmp
snooping mrouter learn pim v2 global configuration command to disable multicast router discovery by
PIMv2.
To prevent PIMv2 packets from being sent to the switch CPU, you must also disable source-only learning
on the switch. Source-only learning sends IP multicast data packets to the CPU and PIMv2 packets are
treated as IP multicast data. Use the no ip igmp snooping source-only learning global configuration
command to disable source-only learning.
Examples This example shows how to prevent PIMv2 packets from being sent to the CPU, by disabling source-only
learning and PIMv2 multicast router detection:
Switch(config)# no ip igmp snooping source-only-learning
Switch(config)# no ip igmp snooping mrouter learn pim v2
You can verify your settings by entering the show running-config | include mrouter learn pim v2
privileged EXEC command.
Release Modification
12.1(20)EA2 This command was introduced.
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