Antaira Industrial Ethernet Switches
LMP-0501 Series User Manual V1.0
36
5.7. 802.1Q VLAN
A Virtual LAN (VLAN) is a logical network grouping that limits the broadcast domain, which allows
a 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 physically plugged into the same switch.
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
