Enabling Igmp Immediate Leave; Configuring The Igmp Leave Timer - Cisco Catalyst 2360 Software Configuration Manual

Configuring IGMP Snooping
Command
Step 3
end
Step 4 show ip igmp snooping groups
Step 5 copy running-config startup-config
To remove the Layer 2 port from the multicast group, use the no ip igmp snooping vlan vlan-id static
mac-address interface interface-id global configuration command.
This example shows how to statically configure a host on a port:
Switch# configure terminal
Switch(config)# ip igmp snooping vlan 105 static 224.2.4.12 interface gigabitethernet0/1
Switch(config)# end

Enabling IGMP Immediate Leave

When you enable IGMP Immediate Leave, the switch immediately removes a port when it detects an
IGMP Version 2 leave message on that port. You should only use the Immediate-Leave feature when
there is a single receiver present on every port in the VLAN.
Immediate Leave is supported only on IGMP Version 2 hosts.
Note
Beginning in privileged EXEC mode, follow these steps to enable IGMP Immediate Leave:
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 on VLAN 130:
Switch# configure terminal
Switch(config)# ip igmp snooping vlan 130 immediate-leave
Switch(config)# end

Configuring the IGMP Leave Timer

Follows these guidelines when configuring the IGMP leave timer:
•
•
•
Catalyst 2360 Switch Software Configuration Guide
15-10
You can configure the leave time globally or on a per-VLAN basis.
Configuring the leave time on a VLAN overrides the global setting.
The default leave time is 1000 milliseconds.
Purpose
Return to privileged EXEC mode.
Verify the member port and the IP address.
(Optional) Save your entries in the configuration file.
Purpose
Enter global configuration mode.
Enable IGMP Immediate Leave on the VLAN interface.
Return to privileged EXEC mode.
Verify that Immediate Leave is enabled on the VLAN interface.
(Optional) Save your entries in the configuration file.
Chapter 15 Configuring IGMP Snooping
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