610 | Multicast Listener Discoveryw w w . d e l l . c o m | s u p p o r t . d e l l . c o m Last Member Query IntervalThe Querier sends a Multicast-Address-Specific Query upon receiving a Done message to ascertainwhether there are any remain receivers for a group. The Last Listener Query Interval is the MaximumResponse Delay for a Multicast-Address-Specific Query, and also the amount of time betweenMulticast-Address-Specific Query retransmissions. Lowering the Last Listener Query Interval reduces thetime to detect that there are no remaining receivers for a group, and so can reduce the amount ofunnecessarily forwarded traffic.Explicit TrackingIf the Querier does not receive a response to a Multicast-Address-Specific Query, it sends another. Then,after no response, it removes the group entry from the group membership table. You can configure thesystem to remove specified groups immediately after receiving a Leave message to reduce leave latency.Configure a Static GroupA group is entered into the group membership table if it has at least one member. Host membershipsexpire. When all memberships for a group expire, the group is removed from the group membership table.Hosts keep their memberships active by responding to queries. You can configure a group entry to never beremoved regardless of membership by creating a static entry in the table.Task Command Syntax Command ModeAdjust the last-member query interval. ipv6 mld last-member-query-intervalDefault: 1000 millisecondsINTERFACETask Command Syntax Command ModeConfigure the system to remove a groupafter receiving immediately after receivinga Leave message.Note: If snooping is enabled on theVLAN, this command has no effect. Inthis case, enable ipv6 mld snoopingexplicit tracking.ipv6 mld explicit-tracking INTERFACETask Command Syntax Command ModeCreate a static entry in the groupmembership table.ipv6 mld static-group INTERFACE
