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3.5.5 VLAN Settings
User can enable the VLAN function at this page. There are two parts in this page. First one is to set the packets
related to the gateway, and the second part is if you use the VLAN setting in the NAT Mode.
There are two kind of destination packets will come from the Gateway's WAN port, one kind of packets will go to
the Gateway, the other will go through the LAN port to the PC.
-- VLAN Packets: if you enable the first VLAN Packets and set the VID, User Priority, and CFI, then all the
incoming packets will be check with the IP Address and the VID.
-- VID: User can follow your service provider to set your VID.
-- User Priority: Defines user priority, giving eight (2^3) priority levels. IEEE 802.1P defines the operation for
these 3 user priority bits. Usually this will be defined by your service provider.
-- CFI: Canonical Format Indicator is always set to zero for Ethernet switches. CFI is used for compatibility reason
between Ethernet type network and Token Ring type network. If a frame received at an Ethernet port has a CFI
set to 1, then that frame should not be forwarded as it is to an untagged port.
When you enable the first VLAN Packets and set the VID, User Priority, and CFI, then all the incoming packets
with the Gateway's IP address and the same VID will be accept by the Gateway. If the incoming packets with the
Gateway's IP address but the different VID then the packets will be discard by the Gateway. The Other incoming
packets with different IP address will go through the LAN port to the PC.
NAT VLAN Setting: When you set your device in NAT mode, the Gateway can help you to filter the wrong
incoming packets. User can separate the other device connected behind the Gateway into 4 VLAN group. User
can set different VID for these 4 groups. When the incoming packets go through the Gateway's WAN port then the
Gateway will check the VID, if the packets is not going to the Gateway(with the Gateway's IP address and the
correct VID), and the VID is not these four VID you set, then the packets will be discard by the Gateway.
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