View the configuration and port status display through display cur, and you can also get whether the port is unmarked or marked. Interface briefly view switch MAC: display MAC-address (with dynamic) View arp table entry: display arp.

The gateway address corresponding to the terminal equipment under vlan (of course, it may also be used for interconnection, so you need to find out which VLANs are business VLANs and which are interconnection VLANs). The 255.x.x.x following this address is a mask that determines the size of the network segment corresponding to your vlan. Then you look at the information under each interface.

Advantages:

The broadcast storm of control network adopts VLAN technology, which can assign a switch port to a VLAN, and the broadcast storm of one VLAN will not affect the performance of other VLANs.

Ensuring network security * * * It is difficult to ensure network security because users can access the network by inserting an active port. VLAN can restrict the access of individual users, control the size and location of broadcast groups, and even lock the MAC address of devices, so VLAN can ensure the security of the network.

Simplify network management Network administrators can easily manage the whole network using VLAN technology. For example, it is necessary to establish a working group network to complete a project, and its members may be all over the country or the world. At this time, the network administrator can set up the VLAN network of the project in a few minutes only by setting a few commands, and its members use VLAN network, just like using LAN.