Enabling Igmp Immediate-Leave Processing; Disabling Ip Multicast-Source-Only Learning - Cisco 2950G 24 - Catalyst Switch Software Configuration Manual
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Also See for 2950G 24 - Catalyst Switch:
- Migration manual (25 pages) ,
- Datasheet (19 pages) ,
- Product support bulletin (5 pages)
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Chapter 17
Configuring IGMP Snooping and MVR
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
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 and verify the
configuration:
Switch# configure terminal
Switch(config)# ip igmp snooping vlan 130 immediate-leave
Switch(config)# end
Switch# show ip igmp snooping vlan 130
vlan 130
----------
IGMP snooping is globally enabled
IGMP snooping is enabled on this Vlan
IGMP snooping immediate-leave is enabled on this Vlan
IGMP snooping mrouter learn mode is pim-dvmrp on this Vlan
IGMP snooping is running in IGMP_ONLY mode on this Vlan
Disabling IP Multicast-Source-Only Learning
The IP multicast-source-only learning method is enabled by default. The switch learns the IP multicast
group from the IP multicast data stream and only forwards traffic to the multicast router ports.
78-14982-01
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.
Verify that Immediate Leave is enabled on the VLAN.
(Optional) Save your entries in the configuration file.
Ports
-----
Gi0/1
Catalyst 2950 Desktop Switch Software Configuration Guide
Configuring IGMP Snooping
17-9
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Troubleshooting
