Disabling Igmp Report Suppression - Cisco Catalyst 3550 series Software Configuration Manual

Chapter 20 Configuring IGMP Snooping and MVR
Beginning in privileged EXEC mode, follow these steps to enable IGMP Immediate-Leave processing:
Command
Step 1
configure terminal
Step 2
ip igmp snooping vlan vlan-id
immediate-leave
Step 3
end
Step 4 show ip igmp snooping vlan vlan-id
Step 5
copy running-config startup-config
To disable IGMP Immediate-Leave on a VLAN, use the no ip igmp snooping vlan vlan-id
immediate-leave global configuration command.
This example shows how to enable IGMP immediate-leave processing on VLAN 130:
Switch# configure terminal
Switch(config)# ip igmp snooping vlan 130 immediate-leave
Switch(config)# end

Disabling IGMP Report Suppression

IGMP report suppression is enabled by default. When it is enabled, the switch forwards only one IGMP
report per multicast router query. When report suppression is disabled, all IGMP reports are forwarded
to the multicast routers.
Note IGMP report suppression is supported only when the multicast query has IGMPv1 and IGMPv2 reports.
This feature is not supported when the query includes IGMPv3 reports.
Beginning in privileged EXEC mode, follow these steps to disable IGMP report suppression:
Command
Step 1
configure terminal
Step 2
no ip igmp snooping report-suppression
Step 3
end
Step 4 show ip igmp snooping
Step 5
copy running-config startup-config
To re-enable IGMP report suppression, use the ip igmp snooping report-suppression global
configuration command.
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Purpose
Enter global configuration mode
Enable IGMP Immediate-Leave processing on the VLAN interface.
Return to privileged EXEC mode.
Verify that Immediate Leave is enabled on the VLAN.
(Optional) Save your entries in the configuration file.
Purpose
Enter global configuration mode.
Disable IGMP report suppression.
Return to privileged EXEC mode.
Verify that IGMP report suppression is disabled.
(Optional) Save your entries in the configuration file.
Catalyst 3550 Multilayer Switch Software Configuration Guide
Configuring IGMP Snooping
20-11