Allied Telesis AT-S62 - Manual (Page 548)

Chapter 24: Port-based and Tagged Virtual LANs
548 Section V: VLANs
Port-based VLAN Overview
As explained in the “VLAN Overview” on page 546, a VLAN consists of a
group of ports on one or more Ethernet switches that form an independent
traffic domain. Traffic generated by the end nodes of a VLAN remains
within the VLAN and does not cross over to the end nodes of other VLANs
unless there is an interconnection device, such as a router or Layer 3
switch.
A port-based VLAN is a group of ports on a Fast Ethernet Switch that form
a logical Ethernet segment. Each port of a port-based VLAN can belong to
only one VLAN at a time.
A port-based VLAN can have as many or as few ports as needed. The
VLAN can consist of all the ports on an Ethernet switch, or just a few ports.
A port-based VLAN can also span switches and consist of ports from
multiple Ethernet switches.
Note
The AT-8500 Series switch is preconfigured with one port-based
VLAN. All ports on the switch are members of this VLAN, called the
Default_VLAN.
The parts that make up a port-based VLAN are:
ˆ VLAN name
ˆ VLAN Identifier
ˆ Untagged ports
ˆ Port VLAN Identifier
VLAN Name
To create a port-based VLAN, you must give it a name. The name should
reflect the function of the network devices that are be members of the
VLAN. Examples include Sales, Production, and Engineering.
VLAN Identifier
Each VLAN in a network must have a unique number assigned to it. This
number is called the VLAN identifier (VID). This number uniquely identifies
a VLAN in the switch and the network.
If a VLAN consists only of ports located on one physical switch in your
network, you assign it a VID different from all other VLANs in your
network.