Chapter 14 Vlan Configuration; Vlan Configuration; Introduction To Vlan - Planet XGS3-42000R User Manual

14.1 VLAN Configuration

14.1.1 Introduction to VLAN

VLAN (Virtual Local Area Network) is a t echnology that divides the logical addresses of devices within the
network to separate network segments basing on functions, applications or management requirements. By
this way, virtual workgroups can be formed regardless of the physical location of the devices. IEEE
announced IEEE 802. 1Q protocol to direct the standardized V LAN implementation, and the V LAN function of
Chassis Switch is implemented following IEEE 802.1Q.
The key idea of VLAN technology is that a large LAN can be partitioned into many separate broadcast
domains dynamically to meet the demands.
VLAN1
Server
VLAN2
VLAN3
Each broadcast domain is a VLAN. VLANs have the same properties as the physical LANs, except VLAN is a
logical partition rather than physical one. Therefore, the partition of VLA Ns can be performed regardless of
physical locations, and the broadcast, multicast and unicast traffic within a V LAN is separated from the other
VLANs.
With the aforementioned features, VLAN technology provides us with the following convenienc e:
 Improving network performanc e
 Saving net work resources
 Simplifying network management
 Lowering network cost
 Enhancing network security

Chapter 14 VLAN Configuration

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Laser Printer
Figure 14-1-1 A VLA N net work defined logically
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14-1
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