Specifications

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Catalyst 4500 Series Switch Cisco IOS Command Reference—Release IOS XE 3.3.0XO(15.1(1)XO)
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Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches
ip igmp snooping
ip igmp snoopi ng
To enable IGMP snooping , use the ip igmp snoo ping command. To disable IGMP snooping, us e the no
form of this command.
ip igmp snooping [tcn {flood query count count | query solicit}]
no ip igmp snooping [tcn {flood query count count | query solicit}]
Syntax Description
Defaults I GMP snooping is enabled.
Command Modes Global c onfiguratio n mode
Interface configuration mode
Usage Guidelines The tcn floo d option applies only to Laye r 2 switc h ports and EtherChann els; it does not apply to rout ed
ports, VLAN interfaces, or La yer 3 channels.
The ip igmp snooping command is disabled by default on multicast routers.
Note You can use the tcn flood option in interface configuration mode.
Examples This exampl e shows how to enable IGMP snoopin g:
Switch(config)# ip igmp snooping
Switch(config)#
This example shows how to disable IGMP snoo ping:
Switch(config)# no ip igmp snooping
Switch(config)#
This example shows how to enable the flood ing of the spanning tree table to the network afte r nine
topology changes have o ccurred:
Switch(config)# ip igmp snooping tcn flood query count 9
Switch(config)#
This example shows how to disable th e flooding of the spannin g tree table to the network:
tcn (Optional) Specifies t he topology change config urations.
flood ( Optional) Specifies to flood the spanning tree table to the network when a topology
change occurs.
query (Optional) Specifies the TCN query configurations.
count count (Optional) Specifies how often the spanning tree table is flooded; valid values are
from 1 to 10.
solicit (Optional) Specifies an IGMP general query.