Chapter 8 Vlan Configuration; Vlan Overview; Configuring Vlan; Creating/Deleting A Vlan - 3Com 8800 Configuration Manual

3Com Switch 8800 Configuration Guide

Chapter 8 VLAN Configuration

8.1 VLAN Overview

Virtual local area network (VLAN) groups the devices in a LAN logically, not physically,
into segments to form virtual workgroups. IEEE issued the IEEE 802.1Q in 1999 to
standardize the VLAN implementations.
The VLAN technology allows network administrators to logically divide a physical LAN
into different broadcast domains or the so-called virtual LANs. Every VLAN contains a
group of workstations with the same demands. The workstations, physically separated,
are not necessarily on the same physical LAN segment.
You can establish VLANs of the following types on switches:
Port-based
MAC address-based
IP multicast-based (A multicast group can be a VLAN.)
Network layer-based (A VLAN can be established by the network layer addresses
or protocols of the hosts.)
With the VLAN technology, the broadcast and unicast traffic within a VLAN will not be
forwarded to other VLANs. This is helpful to control network traffic, save device
investment, simplify network management and enhance security.

8.2 Configuring VLAN

The following sections describe VLAN configuration tasks:

Creating/Deleting a VLAN

Specifying a Description Character String for a VLAN or VLAN interface
Creating/Removing a VLAN Interface
Shutting down/Bringing up a VLAN Interface
8.2.1 Creating/Deleting a VLAN
You can use the following commands to create/delete a VLAN. If the VLAN to be
created exists, the system enters the VLAN view directly. Otherwise, the system
creates the VLAN first, and then enters the VLAN view.
Perform the following configuration in system view.
8-1
Chapter 8 VLAN Configuration