Antaira Industrial Ethernet Switches
LMP-0602-24 Series User Manual V1.1
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5.7. 802.1Q VLAN
A Virtual LAN (VLAN) is a logical network grouping that limits the broadcast domain, which allows
user to isolate network traffic. Only the members of the VLAN will receive traffic from the same
members of VLAN. Basically, creating a VLAN from a switch is logically equivalent of
reconnecting a group of network devices to another Layer 2 switch. However, all the network
devices are still plugged into the same switch physically.
The switch supports port-based and 802.1Q (tagged-based) VLAN. The default configuration of
VLAN operation mode is at “802.1Q”.
5.7.1 802.1Q VLAN settings
Tagged-based VLAN is an IEEE 802.1Q specification standard, and it is possible to create a
VLAN across devices from different switch venders. IEEE 802.1Q VLAN uses a technique to
insert a “tag” into the Ethernet frames. Tag contains a VLAN Identifier (VID) that indicates the
VLAN numbers.
Ports in a port-based VLAN are referred to as untagged ports and the frames received on the
ports as untagged frames. The names derive from the fact that the frames received on a port do
not contain any information that indicates VLAN membership, and that VLAN membership is
determined solely by a port’s PVID.
All of Antaira’s industrial managed switches’ have a default VLAN setting set to “none” for each
port, so the users can login to the VLAN setting interface to create a VLAN Group name and
choose “Tag” or “Untag” for each port.
Figure 5.38 – 802.1Q VLAN Settings Interface
