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igmp fast-leave (interface)
SFTOS Command Reference for the S2410, Version 2.4.1.0 237
igmp fast-leave (interface)
This command enables or disables IGMP Snooping fast-leave admin mode on a selected
interface. 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.
Fast-leave admin mode should be enabled only on VLANs where only one host is connected
to each Layer 2 LAN port, to prevent the inadverdent dropping of the other hosts that were
connected to the same Layer 2 LAN port but were still interested in receiving multicast traffic
directed to that group. Also, fast-leave processing is supported only with IGMP v. 2 hosts.
Syntax
[no] igmp fast-leave
The no version of this command disables IGMP Snooping fast-leave admin mode on a
selected interface.
Default
disable
Mode
Interface Config; Interface VLAN
Command
History
Related
Commands
igmp groupmembership-interval (interface)
This command sets the IGMP Group Membership Interval time on a particular interface. The
group membership interval time is the amount of time in seconds that a switch will wait for a
report from a particular group on a particular interface before deleting the interface from the
entry.
Syntax
igmp groupmembership-interval 2-3600
The variable must be greater than the IGMPv3 maximum response time value. The range is 2
to 3600 seconds.
The
no igmp groupmembership-interval command sets the IGMP v3 group
membership interval time on the interface to the default value.
Default
260 seconds
Version 2.3
Revised from
set igmp fast-leave.
igmp enable (global) Enables IGMP Snooping on the system.
show igmpsnooping Displays IGMP Snooping status information.