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Cisco Catalyst Blade Switch 3120 for HP Command Reference
OL-12248-01
Chapter 2 Cisco Catalyst Blade Switch 3120 for HP Cisco IOS Commands
ip igmp snooping
ip igmp snooping
Use the ip igmp snooping global configuration command on the switch stack or on a standalone switch
to globally enable Internet Group Management Protocol (IGMP) snooping on the switch or to enable it
on a per-VLAN basis. Use the no form of this command to return to the default setting.
ip igmp snooping [vlan vlan-id]
no ip igmp snooping [vlan vlan-id]
Syntax Description
Defaults IGMP snooping is globally enabled on the switch.
IGMP snooping is enabled on VLAN interfaces.
Command Modes Global configuration
Command History
Usage Guidelines When IGMP snooping is enabled globally, it is enabled in all the existing VLAN interfaces. When IGMP
snooping is globally disabled, it is disabled on all the existing VLAN interfaces.
VLAN IDs 1002 to 1005 are reserved for Token Ring and FDDI VLANs and cannot be used in IGMP
snooping.
Examples This example shows how to globally enable IGMP snooping:
Switch(config)# ip igmp snooping
This example shows how to enable IGMP snooping on VLAN 1:
Switch(config)# ip igmp snooping vlan 1
You can verify your settings by entering the show ip igmp snooping privileged EXEC command.
vlan vlan-id (Optional) Enable IGMP snooping on the specified VLAN. The range is 1 to
1001 and 1006 to 4094.
Release Modification
12.2(40)EX This command was introduced.
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