• View the configuration.
CONFIGURATION mode
show running-config
• Disable snooping on a VLAN.
INTERFACE VLAN mode
no ip igmp snooping
Related Configuration Tasks
•Removing a Group-Port Association
•Disabling Multicast Flooding
•Specifying a Port as Connected to a Multicast Router
•Configuring the Switch as Querier
Example of ip igmp snooping enable Command
Dell(conf)#ip igmp snooping enable
Dell(conf)#do show running-config igmp
ip igmp snooping enable
Dell(conf)#
Removing a Group-Port Association
To configure or view the remove a group-port association feature, use the following commands.
• Configure the switch to remove a group-port association after receiving an IGMP Leave message.
INTERFACE VLAN mode
ip igmp fast-leave
• View the configuration.
INTERFACE VLAN mode
show config
Example of Configuration Output After Removing a Group-Port Association
Dell(conf-if-vl-100)#show config
!
interface Vlan 100
no ip address
ip igmp snooping fast-leave
shutdown
Dell(conf-if-vl-100)#
Disabling Multicast Flooding
If the switch receives a multicast packet that has an IP address of a group it has not learned (unregistered
frame), the switch floods that packet out of all ports on the VLAN.
When you configure the no ip igmp snooping flood command, the system drops the packets
immediately. The system does not forward the frames on mrouter ports, even if they are present. Disable
Layer 3 multicast (no ip multicast-routing) in order to disable multicast flooding.
394 Internet Group Management Protocol (IGMP)