Internet cafe switch selection principles and technology development direction

There are many things worth learning about Internet cafe switches. Here we mainly introduce the principles and technology development directions of Internet cafe switch selection. All ports of a symmetric switch have the same speed, for example, 1000 Mbps or 100 Mbps. The ports of an asymmetric switch have different speed, for example, 1000 Mbps and Mbps.

When you decide to use a Mbps backbone network, the central switch should select a Mbps symmetric port switch to connect to the working group switch and server. The working group switch should select an asymmetric switch, and the 1000Mbps port should be used to connect to the central switch, port Mbps is used to connect to the computer.

Port used

In addition to high performance, the modular switch also has great flexibility. You can select different modules based on the network environment to provide different numbers and types of ports. The performance of a fixed port switch is poor. It can only provide a fixed number of ports and is only applicable to a specific network type, but the price is much lower. However, because the Internet cafe environment is relatively simple and requires no high flexibility and scalability, the fixed port is more suitable for Internet cafes.

Stack or cascade

Stack and cascade are two methods to connect Internet cafe switches to expand ports. Stack refers to the use of dedicated modules and cables to stack several switches together and use and manage them as an Internet cafe switch to achieve high-speed connection. Cascade refers to the use of common cables to connect switches to achieve mutual communication. When the Stacking Mode is adopted, the connection bandwidth between Internet cafe switches is usually greater than 1 Gbps; when the cascade mode is adopted, the maximum bandwidth is only 1 Gbps. However, because stacking requires dedicated modules and cables, the price is relatively high. It is recommended that Internet cafes adopt a cascade approach.

Desktop or rack

Because the space of Internet cafes is very valuable, we should minimize the space occupied by network devices. A rack-mounted switch should be selected and fixed to a standard cabinet, which can save valuable space and facilitate power supply and management.

Main Parameters

When purchasing, pay attention to the following main parameters:

Port

To purchase a working group switch, we recommend that you select a 10/100 Mbps switch with 24 or 48 ports, and a Mbps L3 switch with fixed ports be selected for the center switch. Although the Mbps port has a higher transmission rate, it is not recommended for price reasons. In addition, the size of the Internet cafe is usually small, from the switch to the Computer distance is generally within 100, therefore, cheap RJ-45 port is more suitable for Internet cafes.

Forwarding Rate

The forwarding rate is a very important parameter of a vswitch. It fundamentally determines the forwarding rate of an internet cafe vswitch. The forwarding rate is usually expressed as "Mpps" Million Packet Per Second, millions of packets Per Second), that is, the number of packets that can be processed Per Second. The larger the value, the stronger the switch performance.

Board bandwidth

The backboard bandwidth refers to the maximum amount of data that a vswitch interface processor, interface card, and data bus can process. Because communication between all ports must be completed through the backplane, the bandwidth provided by the backplane becomes the bottleneck for concurrent communication between ports. The larger the bandwidth, the higher the available bandwidth that can be provided to each communication port, the faster the data exchange speed. The smaller the bandwidth, the smaller the available bandwidth that can be provided to each communication port, the slower the data exchange speed. Therefore, the higher the bandwidth, the faster the switch transmission rate.

Cache

Cache is used to temporarily store data waiting for forwarding. If the cache capacity is small, the data will be discarded when the concurrent traffic volume is large, leading to network communication failure. Only when the cache capacity is large can we provide better overall performance when the multicast and broadcast traffic is large, while ensuring the maximum possible throughput. Currently, almost all cheap switches use the shared memory structure. All ports share the switch memory, balance network loads, and prevent packet loss.

MAC address count

Each vswitch maintains a MAC address table, which records the relationship between the MAC address and the port, so that access requests are directly forwarded to the corresponding port based on the MAC address. The more MAC addresses are stored, the higher the speed and efficiency of data forwarding, and the stronger the anti-MAC address overflow supply capability. Having mastered the knowledge described in the above sections, you must be able to improve your understanding of Internet cafe switches, so as to know how to select products suitable for you.

With the increasing expansion of Internet cafes and the continuous expansion of network structures, building a stable and efficient network environment has become a fact that many Internet cafe owners have to face. In this case, the majority of owners need to carefully select and carefully choose to build an efficient network with cost-effective products. This article should be able to play a major role in helping the majority of owners buy Internet cafe switches.