HP 6120XG HP ProCurve Series 6120 Blade Switches Multicast and Routing Guide - Page 36

Configuring Delayed Group Flush

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Multimedia Traffic Control with IP Multicast (IGMP) How IGMP Operates Configuring Delayed Group Flush When enabled, this feature continues to filter IGMP groups for a specified additional period of time after IGMP leaves have been sent. The delay in flushing the group filter prevents unregistered traffic from being forwarded by the server during the delay period. In practice, this is rarely necessary on the switches covered in this guide, which support data-driven IGMP. (DataDriven IGMP, which is enabled by default, prunes off any unregistered IGMP streams detected on the switch.) Syntax: igmp delayed-flush < time-period > Where leaves have been sent for IGMP groups, enables the switch to continue to flush the groups for a specified period of time. This command is applied globally to all IGMP-configured VLANs on the switch. Range: 0 - 255; Default: Disabled (0). Syntax: show igmp delayed-flush Displays the current igmp delayed-flush setting. 2-17

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2-17
Multimedia Traffic Control with IP Multicast (IGMP)
How IGMP Operates
Configuring Delayed Group Flush
When enabled, this feature continues to filter IGMP groups for a specified
additional period of time after IGMP leaves have been sent. The delay in
flushing the group filter prevents unregistered traffic from being forwarded
by the server during the delay period. In practice, this is rarely necessary on
the switches covered in this guide, which support data-driven IGMP. (Data-
Driven IGMP, which is enabled by default, prunes off any unregistered IGMP
streams detected on the switch.)
Syntax:
igmp delayed-flush <
time-period
>
Where leaves have been sent for IGMP groups, enables the switch
to continue to flush the groups for a specified period of time.
This command is applied globally to all IGMP-configured
VLANs on the switch. Range:
0 - 255
; Default: Disabled (
0
).
Syntax:
show igmp delayed-flush
Displays the current
igmp delayed-flush
setting.