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

 

In old multicast transmission mode, when users in different VLANs apply for join the same 
multicast group, the multicast router will duplicate this multicast information and deliver each 
VLAN owning a receiver one copy. This mode wastes a lot of bandwidth. 

The problem above can be solved by configuring a multicast VLAN. By adding switch ports to the 
multicast VLAN and enabling IGMP Snooping, you can make users in different VLANs share the 
same multicast VLAN. This saves the bandwidth since multicast streams are transmitted only 
within the multicast VLAN and also guarantees security because the multicast VLAN is isolated 
from user VLANS. 

Before configuring a multicast VLAN, you should firstly configure a VLAN as multicast VLAN and 
add the corresponding ports to the VLAN on the 802.1Q VLAN page. If the multicast VLAN is 
enabled, the multicast configuration for other VLANs on the VLAN Config page will be invalid, that 
is, the multicast streams will be transmitted only within the multicast VLAN. 

Choose the menu Multicast→IGMP Snooping→Multicast VLAN to load the following page. 

 

Figure 9-9 Multicast VLAN 

The following entries are displayed on this screen: 



Enable/Disable Multicast VLAN feature. 

Enter the VLAN ID of the multicast VLAN. 

Specify the aging time of the router port. Within this time, if the 
switch doesn’t receive IGMP query message from the router port, 
it will consider this port is not a router port any more. 

Specify the aging time of the member port. Within this time, if the 
switch doesn’t receive IGMP report message from the member 
port, it will consider this port is not a member port any more. 

Specify the interval between the switch receiving a leave message 
from a host, and the switch removing the host from the multicast 
groups.  

Enter the static router port which is mainly used in the network 
with stable topology. 

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