Using delayed group flush
This feature continues to filter IGMP-Left groups for a specified additional time. Delay in flushing the group filter prevents stale traffic from being forwarded by the server. Delayed group flush is enabled or disabled for the entire switch.
Syntax:
igmp delayed-flush
<time period>
Enables the switch to continue to flush IGMP-Left groups for a specified period of time (0 - 255 seconds). The default setting is Disabled. To disable, reset the time period to zero.
Syntax:
show igmp delayed-flush
Displays the current setting for the switch.