Vlan Configuration; Introduction To Vlan; Vlan Overview - H3C S5500-EI Series Configuration Manual

VLAN configuration

This chapter includes these sections:

Introduction to VLAN

•
Configuring basic VLAN settings
•
Configuring basic settings of a VLAN interface
•
Port-based VLAN configuration
•
MAC-based VLAN configuration
•
• Protocol-based VLAN configuration
IP Subnet-based VLAN configuration
•
Displaying and maintaining VLAN
•
Introduction to VLAN

VLAN overview

Ethernet is a network technology based on the Carrier Sense Multiple Access/Collision Detect
(CSMA/CD) mechanism. As the medium is shared, collisions and excessive broadcasts are common on
Ethernet networks. To address the issue, virtual LAN (VLAN) was introduced to break a LAN down into
separate VLANs. VLANs are isolated from each other at Layer 2. A VLAN is a bridging domain, and all
broadcast traffic is contained within it, as shown in
Figure 31 A VLAN diagram
Router
A VLAN is logically divided on an organizational basis rather than on a physical basis. For example, all
workstations and servers used by a particular workgroup can be assigned to the same VLAN, regardless
of their physical locations.
VLAN technology delivers the following benefits:
Confining broadcast traffic within individual VLANs. This reduces bandwidth waste and improves
•
network performance.
VLAN 2
Switch A
VLAN 5
31.
Figure
Switch B
106