Shulou(Shulou.com)06/03 Report--

In this issue, Xiaobian will bring you three ways to communicate between VLANs. The article is rich in content and analyzes and narrates from a professional perspective. After reading this article, I hope you can gain something.

Three ways to communicate between VLANs

1. Connect to each VLAN on the switch through different physical interfaces of the router;

The advantage of this method is simple management, and the disadvantage is that it is difficult to expand the network. Each new VLAN consumed router ports and access links on switches, and required rerouting of a network cable. Routers, on the other hand, usually don't have too many LAN interfaces.

2. Connect with each VLAN of the switch through the logical subinterface of the router;

This connection mode requires that the ports of both routers and switches support aggregation links, and the protocols used by both parties for aggregation links must naturally be the same;

3, with more than three layers of switches instead of routers to achieve inter-VLAN communication.

At present, there are many switches with more than three layers on the market. In these switches, manufacturers integrate routing functions into switches through hardware or software. Switches are mainly used in campus networks. The routing in campus networks is relatively simple, but the speed of data exchange is required. Therefore, it has been widely used.

VLAN

The Chinese name of VLAN (Virtual Local Area Network) is "Virtual local area network."

Virtual local area network (VLAN) is a logical group of devices and users, these devices and users are not limited by physical location, they can be organized according to functions, departments and applications and other factors, communication between each other as if they are in the same network segment, hence the name virtual local area network. VLAN is a relatively new technology, working at Layer 2 and Layer 3 of the OSI reference model. A VLAN is a broadcast domain, and communication between VLANs is completed through Layer 3 routers. Compared with traditional local area network technology, VLAN technology is more flexible and has the following advantages: the administrative overhead of moving, adding and modifying network devices is reduced; broadcast activities can be controlled; and network security can be improved.

In computer networks, a two-tier network can be divided into several different broadcast domains, one corresponding to a specific group of users, and these different broadcast domains are isolated from each other by default. Communication between different broadcast domains requires one or more routers. Such a broadcast domain is called VLAN.

The above is what the three ways of inter-VLAN communication shared by Xiaobian are. If you happen to have similar doubts, you may wish to refer to the above analysis for understanding. If you want to know more about it, please pay attention to the industry information channel.

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