AirLive VoIP-120A - Manual (Page 24)

3.7.6 VLAN Setting: You can set the VLAN setting in this page. There are two parts in this page.
First one is to set the packets related to the TA, and the second parts is if you use the VLAN
setting in the NAT Mode.
-1- There are two kind of destination packets will come from the TA’s WAN port: one kind of
packets will go to the TA; the other will go through the LAN port to the PC.
-2- 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.
-3- VID: You can follow your service provider to set your VID.
-4- 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.
-5- 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.
-6- When you enable the first VLAN Packets and set the VID, User Priority, and CFI, then all the
incoming packets with the TA’s IP address and the same VID will be accept by the TA. If the
incoming packets with the TA’s IP address but the different VID then the packets will be
discard by the TA. The Other incoming packets with different IP address will go through the
LAN port to the PC.
-7- NAT VLAN Setting: When you set your device in NAT mode, the TA can help you to filter the
wrong incoming packets. You can separate the other device connectd behind the TA into 4
VLAN group. You can set different VID for these 4 groups. When the incoming packets go
through the TA’s WAN port then the TA will check the VID, if the packets is not going to the
TA(with the TA’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 TA.
-8- If no further changes are needed, please click the Save Change Item on the left side; then
click the Save button. The changes you have made will be saved and the system will reboot
automatically.
Figure 17. VLAN Setting
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AirLive VoIP-111A / 120A User’s Manual