Shulou(Shulou.com)06/02 Report--

Introduction to vlan

Vlan is a group of logical devices and users. These devices and users are not limited by physical location. They can be organized according to functions, departments, applications and other factors, and communicate with each other as if they are in the same network segment, hence the name virtual LAN. VLAN is a relatively new technology, which works in layer 2 and layer 3 of the OSI reference model. An VLAN is a broadcast domain, and the communication between VLAN is accomplished through a layer 3 router. Compared with the traditional local area network technology, VLAN technology is more flexible. It has the following advantages: the management overhead of moving, adding and modifying network equipment is reduced; broadcasting activities can be controlled; and network security can be improved.

Operating platform: gns3

Operation flow

Drag a router and three vpc to the operator interface

Change the router mode to add a two-layer veneer

Adding disk space before starting the switch, such as adding it with a command after startup, is very time-consuming

Link the switch to vpc

After startup, double-click the switch and vpc

Check to see if there is space

Enter global mode to turn off routing

Set three PCs on the same network segment, and the ip address is 192.10.10192.168.10.20192.168.10.30 respectively.

Test whether it is connected or not

The test results show that the three PCs communicate with each other.

Configure the switch to divide the pc1 into a single vlan,pc2 pc3 and a vlan

Unconfigured pre-vlan information

Enter global mode and turn off the routing function

Create vlan10,20,30

Match f1Acer 0 to vlan10 f1Acer 1 and F1Acer 2 to vlan20

Enter port f1AGO

Enter port f1max 1f1max 2.

Test commonality

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