746 Configuring L2 Multicast Features
Configuring IGMP Snooping on VLANs
Beginning in Privileged EXEC mode, use the following commands to
configure IGMP snooping settings on VLANs.
CTRL + Z Exit to Privileged EXEC mode.
show ip igmp snooping View IGMP snooping settings configured on the switch.
show ip igmp snooping
interface
interface
View the IGMP snooping settings for a specific port or
LAG.
Command Purpose
configure Enter global configuration mode.
vlan database Enter VLAN Configuration mode.
ip igmp snooping
vlan-id
Enable IGMP snooping on the specified VLAN.
ip igmp snooping
groupmembership-
interval
vlan-id seconds
Specify the host time-out value for the specified VLAN. If
an IGMP report for a multicast group is not received in
the number of seconds specified by the
seconds
value, this
VLAN is deleted from the member list of that multicast
group.
ip igmp snooping
maxresponse
vlan-id
seconds
Specify the leave time-out value for the VLAN. If an
IGMP report for a multicast group is not received within
the number of seconds configured with this command
after an IGMP leave was received from a specific interface,
the current VLAN is deleted from the member list of that
multicast group.
ip igmp snooping fast-
leave
vlan-id
Enables IGMP snooping fast-leave mode on the specified
VLAN. Enabling fast-leave allows the switch to
immediately remove the layer 2 LAN interface from its
forwarding table entry upon receiving an IGMP leave
message for that multicast group without first sending out
MAC-based general queries to the interface.
ip igmp snooping
mcrtexpiretime
vlan-id
seconds
Specify the multicast router time-out value for to
associate with a VLAN. This command sets the number of
seconds to wait to age out an automatically-learned
multicast router port.
Command Purpose
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