Concept Guide
• View the conguration.
CONFIGURATION mode
show running-config
• Disable snooping on a VLAN.
INTERFACE VLAN mode
no ip igmp snooping
Related Conguration Tasks
• Removing a Group-Port Association
• Disabling Multicast Flooding
• Specifying a Port as Connected to a Multicast Router
• Conguring the Switch as Querier
Example of ip igmp snooping enable Command
DellEMC(conf)#ip igmp snooping enable
DellEMC(conf)#do show running-config igmp
ip igmp snooping enable
DellEMC(conf)#
Removing a Group-Port Association
To congure or view the remove a group-port association feature, use the following commands.
• Congure the switch to remove a group-port association after receiving an IGMP Leave message.
INTERFACE VLAN mode
ip igmp fast-leave
• View the conguration.
INTERFACE VLAN mode
show config
Example of Conguration Output After Removing a Group-Port Association
DellEMC(conf-if-vl-100)#show config
!
interface Vlan 100
no ip address
ip igmp snooping fast-leave
shutdown
DellEMC(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 oods that
packet out of all ports on the VLAN.
When you congure 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 ooding.
• Congure the switch to only forward unregistered packets to ports on a VLAN that are connected to mrouter ports.
CONFIGURATION mode
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Internet Group Management Protocol (IGMP)