The personnel engaged in the network related business are clear that the network area is essential to the switch, and the different application level, the selection of the type of switch is not the same. With the increase of data flow, core switch is particularly important. This article gives you a brief introduction of the core switch. How should I choose?
The core switch is a kind of pronoun, not a type of switch, mainly because it is generally placed in the backbone of the network, hence its name. From the name of it, it is very high, the conventional core switch is a modular structure, in order to meet the strong network scalability, all have a considerable number of slots.
The core switch is generally a three layer switch, and the commonly used switches are mainly two layers of switches and three layers of switches, and the two layer switches are ordinary switches.
1. The application level is different. The ordinary switch is mainly used in the access layer, and the core switch is used in the convergence layer. A school has a core machine room and a lot of small classrooms. The network that connects to the classroom is generally used as a common switch. It has a basic forwarding function, and a core switch is needed in the machine room, because it bears the function of gathering data from various classrooms to transmitting data to the ordinary switches.
2, the function is different. Through the first description, it is obvious that the ordinary switch has basic functions, and the core switch is above the ordinary switch, and the level is higher than the ordinary switch, and the function is more complete.
3. The cost is different. Ordinary switches, because of their less functions, cost less and have more ports. Core switches are more expensive because of their many functions and faster transmission speed.
Generally speaking, the following aspects should be considered when selecting core switches.
1, the extensibility is not enough. The so-called scalability is the core switch slot number can module type is not rich. The number of slots in the core switch is usually 32 or 48 indeterminate, and the supported module type is also rich and varied, which should include the RJ-45 optical module, the GBIC optical module, the SFP module, the QSFP optical module, the SFP28 optical module and so on.
2. The forwarding rate. It is very important that speed is not fast enough, that is, the throughput we often say. It is like a highway that can accommodate a lot of traffic. If the throughput is large, it can meet the high density data center application requirements. If the throughput is small, it is easy to cause "traffic jam".
3, backboard bandwidth ability. The bandwidth provided by the backplane becomes the bottleneck of concurrent communication between ports. The greater the bandwidth is, the greater the available bandwidth available to each port, the greater the speed of data exchange; the smaller the bandwidth, the smaller the bandwidth available to each port and the slower the data exchange rate.
In addition to these three factors, there are other factors such as heat dissipation, module redundancy, routing redundancy and so on.
Under the influence of cloud computing and large data, CCIT's core switch, which uses a mature BCM switching chip in the industry, and follows the standard OpenFlow specification, has good openness and compatibility in both software and hardware. It is a civilized term for the SDN solution of the household department. Products.
The CCIT N series switch Wan MB switch provides high performance, perfect end to end service quality, flexible and rich security settings for large network convergence and small and medium data center server access, and maximizes the demand of high speed, security and intelligent enterprise network.
Through the above introduction, we have a certain understanding of the core switch. Before choosing the switch, we must first make clear the level of the application, so as to avoid the loss caused by the purchase of the switch.