30-10
Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX
OL-4266-08
Chapter 30 Configuring IGMP Snooping for IPv4 Multicast Traffic
Configuring IGMP Snooping
• Configuring IGMPv3 Explicit Host Tracking, page 30-13
• Displaying IGMP Snooping Information, page 30-14
Note Except for the global enable command, all IGMP snooping commands are supported only on VLAN
interfaces.
Enabling IGMP Snooping
To enable IGMP snooping globally, perform this task:
This example shows how to enable IGMP snooping globally and verify the configuration:
Router(config)# ip igmp snooping
Router(config)# end
Router# show ip igmp interface vlan 200 | include globally
IGMP snooping is globally enabled
Router#
To enable IGMP snooping in a VLAN, perform this task:
This example shows how to enable IGMP snooping on VLAN 25 and verify the configuration:
Router# interface vlan 25
Router(config-if)# ip igmp snooping
Router(config-if)# end
Router# show ip igmp interface vl25 | include snooping
IGMP snooping is globally enabled
IGMP snooping is enabled on this interface
IGMP snooping fast-leave is disabled and querier is disabled
IGMP snooping explicit-tracking is enabled on this interface
IGMP snooping last member query interval on this interface is 1000 ms
Router#
Command Purpose
Step 1
Router(config)# ip igmp snooping
Enables IGMP snooping.
Router(config)# no ip igmp snooping
Disables IGMP snooping.
Step 2
Router(config)# end
Exits configuration mode.
Step 3
Router# show ip igmp interface vlan
vlan_ID
|
include globally
Verifies the configuration.
Command Purpose
Step 1
Router(config)# interface vlan
vlan_ID
Selects a VLAN interface.
Step 2
Router(config-if)# ip igmp snooping
Enables IGMP snooping.
Router(config-if)# no ip igmp snooping
Disables IGMP snooping.
Step 3
Router(config-if)# end
Exits configuration mode.
Step 4
Router# show ip igmp interface vlan
vlan_ID
|
include snooping
Verifies the configuration.
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