Gain an in-depth understanding of the switch structure and Networking Mode

It should be said that there are many things worth learning about vswitches. Here we mainly introduce the structure and networking methods of vswitches. Currently, the network is more and more widely used, and vswitches play an increasingly important role as a bond in the network. Simply put, a vswitch is connected to a user's computer to exchange data between each computer. In terms of complexity, for the positions of switches in the entire network, some high-level switches, such as layer-3 switches and network-managed products, are not as simple as the switch structure.

Layer-3 routing

Generally, a common switch only works on the data link layer, while a router works on the network layer. A powerful layer-3 switch can work at both the data link layer and the network layer, and forward data packets based on the MAC address or IP address. However, it should be noted that the layer-3 Switch cannot completely replace the router, because it is mainly used for communication between two VLANs in different subnets, rather than for the complex path selection of data transmission.

Network management functions

The management level supported by a vswitch reflects the manageability and operability of the device. Vswitches with network management function can monitor the traffic of each port, set the speed of each port, and close/open the port connection. By monitoring vswitch ports, you can distinguish network service traffic and quickly define network faults, improving network manageability.

Port Aggregation

This is an encapsulation technology. It is a point-to-point link. both ends of the link can be a vswitch, A vswitch, A vro, or a host, a vswitch, or a vro. Based on the port aggregation Trunk) function, allows the switch and the switch, the switch and the router, the host and the switch or the router to be concurrently transmitted through two or more ports to provide higher bandwidth and higher throughput, the entire network capability is greatly provided.

Understanding vswitch Structure

Cascade Method

This is the most common networking method. It is connected through UpLink on a vswitch. Note that a vswitch cannot have unlimited cascade operations. Cascade operations by more than a certain number of vswitches will eventually lead to a broadcast storm, leading to a severe decline in network performance.

Port aggregation Mode

We have come into contact with the characteristics of port aggregation. This method is equivalent to cascade multiple ports at the same time. It provides higher interconnection bandwidth and line redundancy, so that the network has a certain degree of reliability.

Stack Mode

The stacking of switches is the quickest and most convenient way to expand ports, and the bandwidth after stacking is dozens of times the speed of a single switch port. However, not all switches support stacking, depending on the brand and model of the switch. Dedicated stacking cables and stack modules are also required; note that the switches in the same stack must be of the same brand.

Layered Mode

This method is generally used in complex switch structures and can be divided into access layer, aggregation layer, and core layer by function.

Postscript

As an important network connection device, vswitches are frequently used. For home users, the complex application is the cascade structure of vswitches, while advanced applications such as layer-3 routing and stack are usually used in enterprises.