SNR S2940-8G-v2, Configuration Manual

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SNR S2940-8G-v2 Switch Configuration Guide
VLAN Configuration
Chapter 16
VLAN Configuration
16.1 Introduction to VLAN
VLAN (Virtual Local Area Network) is a technology that divides the logical addresses of devices
within the network to separate network segments basing on functions, applications or manage-
ment 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 VLAN
implementation, and the VLAN function of 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.
PC
Printer
Server
Switch Switch Switch
Server Server
PC
PC
PC
PC
VLAN1
VLAN2
VLAN3
Figure 16.1: A VLAN network defined logically
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 VLANs can
be performed regardless of physical locations, and the broadcast, multicast and unicast traffic
within a VLAN is separated from the other VLANs.
With the aforementioned features, VLAN technology provides us with the following conve-
nience:
• Improving network performance
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