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3Com Switch 7750 Series
Command Reference Guide – Multicast Chapter 1 IGMP Snooping Configuration Commands
1-5
Parameter
enable: Enables the IGMP Snooping feature.
disable: Disables the IGMP Snooping feature.
Description
Use the igmp-snooping enable command to enable the IGMP Snooping feature.
Use the igmp-snooping disable command to disable the IGMP Snooping feature.
By default, the IGMP Snooping feature is disabled.
Example
# Enable the IGMP Snooping feature on the switch.
<3Com> system-view
System View: return to User View with Ctrl+Z.
[3Com] igmp-snooping enable
Enable IGMP-Snooping ok.
1.1.6 igmp-snooping fast-leave
Syntax
igmp-snooping fast-leave [ vlan vlan-list ]
undo igmp-snooping fast-leave [ vlan vlan-list ]
View
System view, Ethernet port view
Parameter
vlan-list: Multiple VLANs in the form of vlan-list = { vlan-id [ to vlan-id ] } & < 1-10 >. The
vlan-id argument is the ID of the VLAN, in the range of 1 to 4,094. &<1-10> means that
you can provide the argument repeatedly for up to ten times.
Description
Use the igmp-snooping fast-leave command to enable IGMP fast leave processing.
Use the undo igmp-snooping fast-leave command to cancel the configuration.
By default, IGMP fast leave processing is disabled.
Normally, when receiving an IGMP Leave message, IGMP Snooping does not
immediately remove the port from the multicast group, but sends a group-specific query
message. If no response is received in a given period, it then removes the port from the
multicast group.