When a switch receives an IGMP leave message on a port, the switch sends the group-specific query message on that particular port. You can configure the time interval value after which the switch is supposed to send a group specific query on a port. You also can configure the maximum number of group specific queries sent on a port on reception of an IGMPv2 leave message. The default value of the group query interval value is 2 seconds. Before you can configure IGS features, you must configure your network environment, as described in Topology Example.