D-Link DGS-6600-48T Product Manual - Page 268
ip igmp last-member-query-interval, ip igmp snooping immediate-leave
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DGS-6604 ip igmp last-member-query-interval ip igmp last-member-query-interval Use this command to configure the interval at which the router sends IGMP group-specific or group-source-specific (with IGMP Version 3) query messages. The command sets the timer value for both IGMP L3 queries and IGMP snooping. ip igmp last-member-query-interval MILLISECONDS Syntax Description MILLISECONDS Interval, in milliseconds, at which IGMP group-specific or group-source-specific (with IGMP Version 3) query messages are sent. The range is 1000 to 25000. Default Command Mode Usage Guideline Example 1000 milliseconds VLAN interface configuration When an IGMP querier receives a leave packet, it will send a group specific query or group source specific query. The leave timer starts once the IGMP querier receives a leave packet from an interface. If the interface does not receive the report packet before the leave timer expires, then the interface's membership will be removed from the group or channel that is to be leaved. The value of the leave timer is the value of the last-member-query-interval * the lastmember-query-count. The IGMP last-member-query-interval will be carried within IGMP group-specific queries or group-source-specific (with IGMP Version 3) query messages. The last-member-query-count will have the same value as the robustnessvariable. When IGMP is disabled but IGMP snooping is enabled at the interface, then the IGMP last-member-query-interval value set with this command is used for IGMP snooping. If the command "ip igmp snooping immediate-leave" on page 266 is enabled, then this timer value is ignored and the interface's group or channel membership, identified in the leave request from the host, will be immediately removed from the IGMP snooping membership table. This example shows how to configure IGMP last member query interval value. It configures IGMP last member query interval value to 2 seconds on interface VLAN 1000. Switch#configure terminal Switch(config)# interface vlan1000 Switch(config-if)# ip igmp last-member-query-interval 2000 Switch(config-if)# end Verify the settings by entering the show ip igmp interface command. CLI Reference Guide 258