156 Multicast advanced configurationNN47928-500NN47928-500Variable definitionsThe following table describes the variables and values for configuring IGMP snooping timer.IGMP snooping interface configuration parametersThe following section describes the parameters for configuration of the IGMP snooping interfacelocated at Configuration, Multicast, IGMP Snooping, Interface Configuration tab.Variable ValueRouter Port Purge Interval(secs)Type the time interval for which the learnt router port is purged.For each learnt router port, the timer runs for the configured port purgetime interval. When the timer expires, the learnt router port entry is purged.If control messages are received from the router before the timer expiry,then the timer restarts.The value ranges from 60 to 600.The default value is 125 seconds.Group-Member Port PurgeInterval (secs)Type the time interval after which a port is deleted, if IGMP reports are notreceived on a port.The timer runs for the configured time for each port on which a report isreceived.This timer restarts whenever a report message is received from a host onthe specific port. If the timer expires, the learnt port entry is purged fromthe multicast group.The value ranges from 130 to 1225.The default value is 260 seconds.Report Forward Interval (secs) Type the time interval within which the next report messages for the samemulticast group is not forwarded.This timer is used when proxy reporting is disabled and the switch mustsuppress multiple IGMPv2 report messages for the same group frombeing forwarded to the router. The Report Forward Interval is configuredfor each multicast group. This timer is started as soon as a reportmessage for that group is forwarded.Within this Report Forward Interval, if another report for the same grouparrives, the report is not forwarded.The value ranges from 1 to 25.The default value is 5 seconds.Group Query Interval (secs) Type the interval within which the switch sends a group-specific query ona port when an IGMPv2 leave message is received.The value ranges from 2 to 5.The default value is 2 seconds.
