Allied Telesis AT-S63 - Manual (Page 430)

Chapter 19: Port-based and Tagged VLANs
430 Section III: VLANs
Port-based VLAN Overview
As explained in ”VLAN Overview” on page 428, 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 Gigabit 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 also can span switches and consist of ports
from multiple Ethernet switches.
Note
The AT-9400 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:
❑ VLAN name
❑ VLAN Identifier
❑ Untagged ports
❑ 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.
If a VLAN spans multiple switches, then the VID for the VLAN on the
different switches should be the same. The switches are then able to