Analysis on the Development Status and Application of Industrial Ethernet Switches
2019/7/25 2:44:24
Nowadays the network is covering all the industry level, it can be said that the "network" theory is the success or failure. The use of the network in the production, operation and management of the enterprise. According to the investigation and analysis of a plurality of enterprises, the enterprise is a unit, and the special Ethernet switch is often adopted, and different network frame priority levels are customized at the interface, so that the information required by the enterprise and the user is provided to be transmitted out. In terms of development, the overall level of the enterprise-class industrial Ethernet switch in our country is still in the reference and import stage, and the terminal and the downstream customer base mainly focus on the communication system, the power system, the traffic industry and the IT specialty. According to the national macro-expectation, during the "12th Five-Year", the average annual market capacity of the industrial Ethernet switch is about 3 billion yuan, and the composite growth rate in the next three years will be up to 25%.
Industrial Ethernet switch
1. The concept of industrial Ethernet switch
First of all, let us look at the concept of the switch: in a broad sense, the switch is a kind of transmission device, that is, the information exchange and intercommunication can be realized in the communication system. It belongs to the network equipment of the data link layer, and is divided into two-layer switch and three-layer switch. The two-layer switch can be used as a hub, and the three-layer switch is widely used, and it can work at the network layer. Ethernet switch refers to a switch based on Ethernet data, which is a kind of local area network with shared bus type transmission media.
It is divided into: industrial Ethernet switch and commercial Ethernet switch. the industrial Ethernet switch is to meet the on-site requirement of the related operation in the industry, can be compatible with the commercial Ethernet switch in the technology, and more requires the guarantee of various aspects such as real-time communication, reliability, stability, security, environmental adaptability and the like, An ethernet device that is generally above a commercial ethernet switch. It is divided into two categories: network management and non-network management. The network management type industrial Ethernet switch has the characteristics of high unit value, although the current sales quantity is less than that of the non-network management type industrial Ethernet switch, it is the mainstream of the market. In our country, the industrial Ethernet switch is in the period of the product life cycle (long-term), considering the demand of many industries and enterprises, the supply of low-and low-end market products is constantly enriched, and the application of the network management-type switch is accelerated.
2. Operating principle of Ethernet switch
Throughout the opinion, most of the way of managing the industrial Ethernet switch is the management of the console, the wizard of IE browsing, and the mode of combining the three modes of the network management software.
2.1 Administration through serial interface:
For a switch with a network management function, there is a serial cable for switch access. When in use, connect the switch to the PC computer with a cable and turn on the switch and the computer power. Switches in multiple brands support the provision of the "Hyper Terminal" program in Windows. After the hardware connection is good, the "HyperTerminal" is opened and the necessary connection parameters are set, and the operation interaction can be realized with the switch. Because this does not take up the bandwidth of the switch, it is called out of band. In this mode of management, the switch provides a menu-driven console interface or command line interface. You can use the "Tab" key or the arrow keys to move in the menus and sub-menus, press the Enter key to execute the corresponding command, or use a dedicated switch to manage the command set management switch. Note that the technology complication and diversification of IT industry make the switch command set of different brands to be different, sometimes even the same brand of switch, its command is different, and if the use of the menu command is often more convenient in operation.
2.2 Web management: A switch with a network management function can be managed by a web browser, but the prerequisite is to give an IP address to the switch. This IP address is not intended to be confused with the IP concept of the computer, in addition to the use of the management switch. In the initial default state, the switch is no IP address and must be enabled in the "HyperTerminal", after specifying an IP address in the interface mode. When using a web browser to manage the switch, the switch is equivalent to a Web server, just the web page is not stored in the hard disk, but in the NVRAM of the switch, the program can upgrade the Web program in NVRAM. When the administrator enters the IP address of the switch in the browser, the switch passes the web page to the computer, just like a server, and the feeling is as if you were visiting a Web site. This way takes up the bandwidth of the switch, and is therefore called In band. Web management can be done on a local area network, so remote management can be achieved.
2.3 Management through the network management software:
The network management switch follows the SNMP protocol (Simple Network Management Protocol), and the SNMP protocol is a complete set of network equipment management specifications that meet the international standards. for devices that follow the snmp protocol, Can be managed through the network management software. You only need to install a set of SNMP network management software on a network management workstation, and the switch, router, server, etc. on the network can be easily managed through the local area network. The interface of SNMP network management software is also an in-band management mode.
3. Analysis of the present situation of industrial Ethernet switch
3.1 Technical innovation for industrial Ethernet switches. With the development of the network technology, the requirement of the working performance in the field of industrial control is becoming more and more high. Therefore, the Ethernet is striding into the field of industrial control to form a new type of Ethernet control network technology. The industrial Ethernet switch analyzed by our company is different from the commercial switch due to its use and location, and it is more concerned with the stability, high temperature resistance, vibration resistance, corrosion resistance and other industrial characteristics. Considering the bad weather conditions of some industrial sites, such as multi-vibration, large moisture, high temperature and the like, the common switch does not have the ability to resist the various conditions occurring in the industrial environment in the design, and can not guarantee long-time operation under such an environment, It is generally not recommended to use commercial switches in the industry. The industry-level switch has power supply protection, and the accidental power-off can be output by the relay, redundant double-power-supply input, active circuit protection, etc. At the same time, taking into account the financial problems of small and medium-sized enterprises, though it is a trend for gigabit and even 10-million to the desktop, it is still the best choice for enterprise users to build a high-cost-effective industrial network with its unique advantages such as low investment and low power consumption.
The industrial switch product has the following characteristics:
(1) a redundant power supply input is used for preventing a single power supply error;
(2) an annular topological structure is provided, a redundant path is provided; and
(3) a built-in high-quality and high-reliability part is built, ensuring a longer mean time-to-failure time;
(4) can be applied to the temperature state of the ultra-standard, such as -40 to 75 DEG C,
(5) the durable shell and the good temperature-resistant capability.
3.2 Application of industrial Ethernet switch in enterprise.
At present, about 50 manufacturers are active in Ethernet switch market, including 15 foreign-funded manufacturers,3-4 domestic manufacturers and 30 local manufacturers. The local brand is the most popular in the local manufacturers. At present, the domestic industrial Ethernet switch is mainly applied in the three industries of electric power, traffic and metallurgy, and the three industries account for more than half of the market capacity of the domestic industrial Ethernet switch; The amount of the metallurgical industry is less than the above two industries. In the power industry, a large number of industrial Ethernet switches are used in power generation and transmission/ transformation links; applications in the field of transportation include the subway, the railway and the highway; the metallurgical industry is mainly applied at the MES level, and the FCS layer is basically not applied.
3.3 The development direction of industrial Ethernet switch. In the future, with the continued development of industrial automation, the demand side of the industrial Ethernet switch will be expanded, and the demand will also increase. The industrial Ethernet is mainly applied in the field of control and information transmission in the industrial production, and extends to the field of field. The electric power system, the traffic industry and the metallurgy field are also the main fields of the application of the industrial Ethernet switch, and the industries such as the petrochemical industry and the water treatment in the same period are also showing the demand for the industrial Ethernet switch. from the point of view of long-term and practical effect, the industrial Ethernet switch should further improve its own technology, and strive to strengthen the protection technology, communication real-time performance, stability and so on, and the wireless network, The development of network technology, such as Bluetooth, has injected new blood and vitality into the development of industrial Ethernet switch technology. It is envisioned that the industrial ethernet switches will have a qualitative boost and a greater number of unknown challenges in the next few years.
The development of the industrial Ethernet switch in China is as the rising sun, the prospect is great, in the increasingly competitive industrial field, with the continuous promotion of the industrial automation process, the information network technology can be used properly and the enterprise can get better development space. Under such a background, with the development of industrial Ethernet technology application, the future of industrial Ethernet switch will have more development and wider application.
