TP-LINK 24-Port 10/100Mbps + 4-Port Gigabit L2 Fully Managed Switch TL-SL5428E 데이터 시트

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TL-SL5428E
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When receiving 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. 
 
IGMP Snooping Fundamentals 
1. Ports  
Router Port: Indicates the switch port directly connected to the multicast router. 
Member Port: Indicates a switch port connected to a multicast group member. 
2. Timers 
Router Port Time: 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. 
Member Port Time: 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. 
Leave Time: 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: Snooping Config
VLAN Config,  Port Config,  IP-Range,  Multicast VLAN, Static Multicast IP and Packet 
Statistics
9.1.1 Snooping Config 
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 Multicast →IGMP Snooping →Snooping Config to load the following page. 
 
Figure 9-5 Basic Config 
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