Cisco 7604 User Manual

30-12
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
To configure the interval for the IGMP snooping queries sent by the router, perform this task:
This example shows how to configure the IGMP snooping query interval:
Router(config-if)# ip igmp snooping last-member-query-interval 200
Router(config-if)# exit
Router# show ip igmp interface vlan 200 | include last
IGMP snooping last member query interval on this interface is 200 ms
Enabling IGMP Fast-Leave Processing
To enable IGMP fast-leave processing in a VLAN, perform this task:
This example shows how to enable IGMP fast-leave processing on the VLAN 200 interface and verify
the configuration:
Router# interface vlan 200
Router(config-if)# ip igmp snooping fast-leave
Configuring fast leave on vlan 200
Router(config-if)# end
Router# show ip igmp interface vlan 200 | include fast-leave
IGMP snooping fast-leave is enabled on this interface
Router(config-if)#
Configuring Source Specific Multicast (SSM) Mapping
Note • Release 12.2(18)SXD3 and later releases support SSM mapping.
• Do not configure SSM mapping in a VLAN that supports IGMPv3 multicast receivers.
To configure SSM mapping, refer to this publication:
http://www.cisco.com/en/US/docs/ios/12_3t/12_3t2/feature/guide/gtssmma.html
Command Purpose
Step 1
Router(config)# interface vlan vlan_ID
Selects a VLAN interface.
Step 2
Router(config-if)# ip igmp snooping
last-member-query-interval
interval
Configures the interval for the IGMP snooping queries
sent by the router. Default is 1 second. Valid range is 100
to 999 milliseconds.
Router(config-if)# no ip igmp snooping last
Reverts to the default value.
Command Purpose
Step 1
Router(config)# interface vlan vlan_ID
Selects a VLAN interface.
Step 2
Router(config-if)# ip igmp snooping fast-leave
Enables IGMP fast-leave processing in the VLAN.
Router(config-if)# no ip igmp snooping fast-leave
Disables IGMP fast-leave processing in the VLAN.

Cisco 7604 Specifications

General

Brand	Cisco
Model	7604
Category	Network Router
Language	English