115
C.3 Protocol
C.3.1 VLAN
VLAN configuration
A Virtual LAN (VLAN) is a logical network grouping that limits the broadcast domain,
which would allow you to isolate network traffic, so 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 industrial switch supports port-based and 802.1Q (tagged-based) VLAN. The
default configuration of VLAN operation mode is “
Disable
”.
Figure C.39: VLAN Configuration
802.1Q VLAN
Tagged-based VLAN is an IEEE 802.1Q specification standard. Therefore, 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.
You can create Tag-based VLAN, and enable or disable GVRP protocol. There are 256
VLAN groups to provide configure. Enable 802.1Q VLAN, the all ports on the switch
belong to default VLAN, VID is 1. The default VLAN can’t be deleting.
GVRP allows automatic VLAN configuration between the switch and nodes. If the
switch is connected to a device with GVRP enabled, you can send a GVRP request
using the VID of a VLAN defined on the switch; the switch will automatically add that
device to the existing VLAN.
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