Cisco 2950 - Catalyst Switch User Manual

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Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide
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Chapter 21 Configuring IGMP Snooping and MVR
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:
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 Mac Address Type Ports
---- ----------- ---- -----
1 0100.5e00.0203 USER Gi0/1
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 Purpose
Step 1
configure terminal Enter global configuration mode
Step 2
ip igmp snooping vlan vlan-id static
mac-address interface interface-id
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.
Step 3
end Return to privileged EXEC mode.
Step 4
show ip igmp snooping mrouter vlan vlan-id
or
show mac address-table multicast vlan vlan-id
Verify that the member port is a member of the VLAN multicast
group.
Verify the member port and the MAC address
Step 5
copy running-config startup-config (Optional) Save your entries in the configuration file.
Command Purpose
Step 1
configure terminal Enter global configuration mode
Step 2
ip igmp snooping vlan vlan-id
immediate-leave
Enable IGMP Immediate-Leave processing on the VLAN interface.
Step 3
end Return to privileged EXEC mode.

Cisco 2950 - Catalyst Switch Specifications

General

Forwarding Rate	6.6 Mpps
Jumbo Frame Support	No
Weight	8.8 lbs (4 kg)
RAM	16 MB
Flash Memory	8 MB
Manageable	Yes
Form Factor	Rack-mountable
Ports	24 Ethernet 10/100 ports
Uplink Ports	2 x 10/100/1000Base-T ports
VLANs	250
MAC Address Table Size	8000
Power Supply	100-240 VAC, 50-60 Hz
Dimensions	4.4 cm x 44.5 cm x 24.2 cm
Operating Temperature	0 to 40 °C (32 to 104 °F)
Storage Temperature	-25 to 70 °C (-13 to 158 °F)
Operating Humidity	10% to 85% (non-condensing)
Storage Humidity	5% to 95% (non-condensing)