Moxa Technologies EDS-405A Using Virtual LANs, The Virtual LAN VLAN Concept, What is a VLAN?

EDS-408A/405A Series User’s Manual Featured Functions

TOS/DiffServ Mapping

Setting	Description	Factory Default
Low/Normal/	Set the mapping table of different TOS values to 4	1 to 16: Low
		17 to 32: Normal
Medium/High	different egress queues.	33 to 48: Medium
		49 to 64: High

Using Virtual LANs

Setting up Virtual LANs (VLANs) on your EDS increases the efficiency of your network by dividing the LAN into logical segments, as opposed to physical segments. In general, VLANs are easier to manage.

The Virtual LAN (VLAN) Concept

What is a VLAN?

A VLAN is a group of devices that can be located anywhere on a network, but which communicate as if they are on the same physical segment. With VLANs, you can segment your network without being restricted by physical connections—a limitation of traditional network design. As an example, with VLANs you can segment your network according to:

yDepartmental groups—You could have one VLAN for the Marketing department, another for the Finance department, and another for the Development department.

yHierarchical groups—You could have one VLAN for directors, another for managers, and another for general staff.

yUsage groups—You could have one VLAN for e-mail users, and another for multimedia users.

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