Owners manual

DGS-1510 Series Gigabit Ethernet SmartPro Switch CLI Reference Guide
277
Level: 12.
Usage Guideline
The command is only available for VLAN interface configuration. The ip igmp snooping fast-leave
command allows IGMP membership to be immediately removed from a port when receiving the leave
message without using the group specific or group-source specific query mechanism.
Example
This example shows how to enable IGMP snooping fast-leave on VLAN 1.
Switch# configure terminal
Switch(config)# vlan 1
Switch(config-vlan)# ip igmp snooping fast-leave
Switch(config-vlan)#
31-4 ip igmp snooping last-member-query-interval
This command is used to configure the interval at which the IGMP snooping querier sends IGMP group-
specific or group-source-specific (channel) query messages. Use the no form of the command to revert to
the default setting.
ip igmp snooping last-member-query-interval SECONDS
no ip igmp snooping last-member-query-interval
Parameters
SECONDS
Specifies the maximum amount of time between group-specific query
messages, including those sent in response to leave-group messages.
The range of this value is 1 to 25.
Default
By default, this value is 1 second.
Command Mode
Interface Configuration Mode.
Command Default Level
Level: 12.
Usage Guideline
The command is only available for VLAN interface configuration. On receiving an IGMP leave message,
the IGMP snooping querier will assume that there are no local members on the interface if there are no
reports received after the response time. Users can lower this interval to reduce the amount of time it
takes a switch to detect the loss of the last member of a group.
Example
This example shows how to configure the last member query interval time to be 3 seconds.
Switch# configure terminal
Switch(config)# vlan 1000
Switch(config-vlan)# ip igmp snooping last-member-query-interval 3
Switch(config-vlan)#