TP-Link T1600G-52PS TL-SG2452P T1600G-28PSTL-SG2424P V1 User Guide - Page 140

Multicast VLAN

Page 140 highlights

Router Ports:  VLAN Table Select: VLAN ID: Router Port Time: Member Port Time: Static Router Ports: Dynamic Router Ports: Specify the static router port which is mainly used in the network with stable topology. Select the VLAN ID you want to change. Displays the VLAN ID. Displays the router port time of this VLAN. Displays the member port time of this VLAN. Displays the static router ports of this VLAN. Displays the dynamic router ports of this VLAN. Note: 1. The MLD snooping function in a VLAN will take effect when global MLD snooping function is enabled in 8.2.1 Snooping Config and the VLAN is created in Chapter 6 VLAN. 2. When the router port time or member port time is set for a VLAN, this value overrides the value configured globally in 8.2.1 Snooping Config. 8.2.4 Multicast VLAN 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 MLD 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. 130

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130
Router Ports:
Specify the static router port which is mainly used in the network
with stable topology.
VLAN Table
Select:
Select the VLAN ID you want to change.
VLAN ID:
Displays the VLAN ID.
Router Port Time:
Displays the router port time of this VLAN.
Member Port Time:
Displays the member port time of this VLAN.
Static Router Ports:
Displays the static router ports of this VLAN.
Dynamic Router
Ports
Displays the dynamic router ports of this VLAN.
Note:
1.
The MLD snooping function in a VLAN will take effect when global MLD snooping function is
enabled in
8.2.1 Snooping Config
and the VLAN is created in
Chapter 6 VLAN
.
2.
When the router port time or member port time is set for a VLAN, this value overrides the value
configured globally in
8.2.1 Snooping Config
.
8.2.4 Multicast VLAN
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 MLD 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.