Allied Telesis AT-GS950/16PS, AT-S112 manual Port-based Vlan Overview, Vlan Name

Port-based VLAN Overview

AT-GS950/16PS Switch Web Interface User’s Guide

With VLANS, you can reconfigure the LAN segment assignment of an end node connected to the AT-GS950/16PS switch’s management software. Also, you can change the VLAN memberships without moving the workstations physically or change group memberships without moving cables from one port to another.

In addition, a virtual LAN can span more than one switch. This means that the end nodes of a VLAN do not need to be connected to the same switch and so are not restricted to being in the same physical location.

The AT-GS950/16PS Gigabit Ethernet Smart Switch supports the following types of VLANs:

Port-based VLANs

Tagged VLANs

Both types of VLANs are described in the following sections.

As explained in the “VLAN Overview” on page 150, a VLAN consists of a group of ports on an Ethernet switch that form an independent traffic domain. This type of VLAN is independent of the header information including VLAN tags in a frame. 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 the switch that form a logical Ethernet segment. 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.

There are two components of a port-based VLAN in the

AT-S112 Management software:

VLAN Name

VLAN Index

VLAN Name

To create a port-based VLAN, you must give it a unique name. This name can reflect the function of the network devices that are VLAN members, such as Sales, Production, and Engineering.

VLAN Index

You must assign a unique number to each VLAN in a network. This number is called the Port-Based VLAN Index. This number uniquely identifies a VLAN in the AT-GS950/16PS switch and across the network.

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