Configuring A Host Statically To Join A Group; Enabling Igmp Immediate-Leave Processing - Cisco 2950 - Catalyst Switch Configuration Manual

Configuring IGMP Snooping

Configuring a Host Statically to Join a Group

Hosts or Layer 2 ports normally join multicast groups dynamically, but you can also statically configure
a host on an interface.
Beginning in privileged EXEC mode, follow these steps to add a Layer 2 port as a member of a multicast
group:
Command
Step 1 configure terminal
Step 2
ip igmp snooping vlan vlan-id static
mac-address interface interface-id
Step 3 end
Step 4 show ip igmp snooping mrouter vlan vlan-id
or
show mac address-table multicast vlan vlan-id
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 an interface and verify the configuration:
Switch# configure terminal
Switch(config)# ip igmp snooping vlan 1 static 0100.5e00.0203 interface gigabitethernet0/1
Switch(config)# end
Switch# show mac address-table multicast vlan 1
Vlan
----
1

Enabling IGMP Immediate-Leave Processing

When you enable IGMP Immediate-Leave processing, the switch immediately removes a port when it
detects an IGMP version 2 leave message on that port. You should use the Immediate-Leave feature only
when there is a single receiver present on every port in the VLAN.
Immediate Leave is supported with only IGMP version 2 hosts.
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
Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide
21-10
Mac Address Type
----------- ----
0100.5e00.0203 USER
Purpose
Enter global configuration mode
Enable IGMP Immediate-Leave processing on the VLAN interface.
Return to privileged EXEC mode.
Chapter 21
Purpose
Enter global configuration mode
Statically configure a Layer 2 port as a member of a multicast
group:
• vlan-id is the multicast group VLAN ID.
• mac-address is the group MAC address.
• interface-id is the member port.
Return to privileged EXEC mode.
Verify that the member port is a member of the VLAN multicast
group.
Verify the member port and the MAC address
(Optional) Save your entries in the configuration file.
Ports
-----
Gi0/1
Configuring IGMP Snooping and MVR
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