Chapter 6 Basic Setting
GS3700/XGS3700 Series User’s Guide
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6.3 Introduction to VLANs
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.
Note: VLAN is unidirectional; it only governs outgoing traffic.
See
Chapter 7 on page 101 for information on port-based and 802.1Q tagged VLANs.
6.4 Switch Setup
Click Basic Setting > Sw itch Setup in the navigation panel to display the screen as shown. The
VLAN setup screens change depending on whether you choose 802.1Q or Port Based in the VLAN
Type field in this screen (in Standalone mode). Refer to the chapter on VLAN.
Apply Click Apply to save your changes to the Switch’s run-time memory. The Switch loses
these changes if it is turned off or loses power, so use the Save link on the top
navigation panel to save your changes to the non-volatile memory when you are done
configuring.
Cancel Click Cancel to begin configuring this screen afresh.
Table 12 Basic Setting > General Setup (continued)
LABEL DESCRIPTION
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