When receivi
ng IGMP leave message, the switch will forward IGMP group-specific-query message
to check if other members in the multicast group of the port need this multicast and reset the
member port time to the leave time. When the leave time times out, the switch will remove the port
from the corresponding multicast group. If no other member is in the group after the port is
removed, the switch will send IGMP leave message to the router and remove the whole multicast
group.
" KIOR"Upqqrkpi"Hwpfcogpvcnu"
1. Ports
Tqwvgt"Rqtv< Indicates the switch port directly connected to the multicast router.
Ogodgt"Rqtv< Indicates a switch port connected to a multicast group member.
2. Timers
Tqwvgt"Rqtv"Vkog<"Within the time, if the switch does not receive IGMP query message from the
router port, it will consider this port is not a router port any more. The default value is 300 seconds."
Ogodgt"Rqtv"Vkog< Within the time, if the switch does not receive IGMP report message from the
member port, it will consider this port is not a member port any more. The default value is 260
seconds.
Ngcxg"V kog< Indicates the interval between the switch receiving a leave message from a host and
the switch removing the host from the multicast groups. The default value is 1 second.
The IGMP Snooping function can be implemented on the following pages: Upqqrkpi" Eqphki,
XNCP" Eqphki, Rqtv" Eqphki, KR/Tcpig, Ownvkecuv" XNCP," Uvcvke" Ownvkecuv" KR and Rcemgv"
Uvcvkuvkeu.
320303" Upqqrkpi"Eqphki"
To configure the IGMP Snooping on the switch, please firstly configure IGMP global configuration
and related parameters on this page.
If the multicast address of the received multicast data is not in the multicast address table, the
switch will broadcast the data in the VLAN. When Unknown Multicast Discard feature is enabled,
the switch drops the received unknown multicast so as to save the bandwidth and enhance the
process efficiency of the system. Please configure this feature appropriate to your needs.
Choose the menu Ownvkecuv"→KIOR"Upqqrkpi"→Upqqrkpi"Eqphki"to load the following page.
Figure 10-5 Basic Config
141
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