Amer Networks SS2R48G4i V2 - Manual (Page 97)

SS2R24G4i/SS2R48G4i
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Chapter 9 VLAN Configuration
9.1 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 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 VLAN implementation, and
the VLAN function of the 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.
Server Server Server
IBM PC IBM PC IBM PC
Desktop PC Desktop PC
Laser Printer
VLAN1
VLAN2
VLAN3
Switch Switch Switch
Fig 9-1 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 convenience
z Improving network performance
z Saving network resources
z Simplifying Network Management
z Lowering network cost
z Enhancing network security
VLAN and GVRP (GARP VLAN Registration Protocol) defined by 802.1Q are implemented in
SS2R24/48G4i switch switch. The chapter will describe the use and configuration of VLAN and GVRP
in details.