15
The Virtual Local Area Network (VLAN) technology is developed for switches to control broadcasts in LANs.
A VLAN can span multiple physical spaces. This enables hosts in a VLAN to be located in different physical locations. By
creating VLANs in a physical LAN, you can divide the LAN into multiple logical LANs, each of which has a broadcast domain
of its own. Hosts in the same VLAN communicate in the traditional Ethernet way. However, hosts in different VLANs
cannot communicate with each other directly but need the help of network layer devices, such as routers and Layer 3
switches.
Advantages of VLANs
Compared with traditional Ethernet technology, VLAN technology delivers the following benefits:
l Confining broadcast traffic within individual VLANs. This saves bandwidth and improves network performance.
l Improving LAN security. By assigning user groups to different VLANs, you can isolate them at Layer 2. To enable
communication between VLANs, routers or Layer 3 switches are required.
l Flexible virtual workgroup creation. As users from the same workgroup can be assigned to the same VLAN regardless
of their physical locations, network construction and maintenance is much easier and more flexible.
5.1.1 Static VLAN (802.1Q VLAN) Configure
1. Choose the menu Configuration →VLAN →Static VLAN to load VLAN page.
Figure 5-1-2
To Next Page
Loading...
