GS1900 Series User’s Guide
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CHAPTER 20
Configuration: VLAN
20.1 Overview
This section provides information for VLAN in Configuration.
A VLAN (Virtual Local Area Network) allows a physical network to be partitioned into multiple logical
networks. Devices on a logical network belong to one group. A device can belong to more than one
group. With VLAN, a device cannot directly talk to or hear from devices that are not in the same
group(s); the traffic must first go through a router.
In MTU (Multi-Tenant Unit) applications, VLAN is vital in providing isolation and security among the
subscribers. When properly configured, VLAN prevents one subscriber from accessing the network
resources of another on the same LAN, thus a user will not see the printers and hard disks of
another user on the same network.
VLAN also increases network performance by limiting broadcasts to a smaller and more
manageable logical broadcast domain. In traditional switched environments, all broadcast packets
go to each and every individual port. With VLAN, all broadcasts are confined to a specific broadcast
domain.
20.1.1 What You Can Do in this Chapter
• The VLAN screen (Section 20.2 on page 114) displays VLAN, port, and VLAN port settings.
• The Guest VLAN screen (Section 20.3 on page 119) displays the global and port settings of the
Switch.
• The Voice VLAN screen (Section 20.4 on page 121) displays the global, OUI, and port settings
of the Switch.
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