Configuring Igmp Snooping; Removing A Group-Port Association - Dell S4048T Configuration Manual

• If IGMP snooping is enabled on a PIM-enabled VLAN interface, data packets using the router as an Layer
2 hop may be dropped. To avoid this scenario, Dell Networking recommends that users enable IGMP
snooping on server-facing end-point VLANs only.

Configuring IGMP Snooping

Configuring IGMP snooping is a one-step process. To enable, view, or disable IGMP snooping, use the
following commands.
There is no specific configuration needed for IGMP snooping with virtual link trunking (VLT). For information
about VLT configurations, refer to
• Enable IGMP snooping on a switch.
CONFIGURATION mode
ip igmp snooping enable
• 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
Virtual Link Trunking (VLT).
Internet Group Management Protocol (IGMP) 438