Describes the hardware of soft routing and traffic control.

With the development of China's routing industry, the soft routing technology is constantly updated and upgraded. Here we mainly explain what is hardware traffic control and software traffic control, traffic control is used to prevent Frame loss when the port is blocked. This method is implemented by sending the blocked signal back to the source address when the sending or receiving buffer starts to overflow. The traffic control software can effectively prevent the impact of a large amount of data on the network in an instant, and ensure the efficient and stable operation of the user's network. There are two ways to control traffic:

1. In the half-duplex mode, traffic control is implemented through reverse pressure, that is, back pressure count. This count is achieved by sending a jamming signal to the sending source to reduce the transmission speed of information sources.

2. In full duplex mode, traffic control generally follows the IEEE 802.3X standard. A switch sends a "pause" frame to the information source to suspend sending. Some switch traffic control will block the entire lan input, which greatly reduces network performance. High-Performance switches only block the port that inputs frames to the congestion port of the switch. Traffic control is adopted to control the data traffic between transmission and receiving nodes and prevent packet loss.

What is hardware traffic control and software traffic control?

Hardware throttling can be referred to as hard throttling. It is generally a network device consisting of complete hardware designed and manufactured by an enterprise and independently developed software. For example, Ascenflow, packeteer, Ace net, Jin Yu, sungate, and Sangfor. Soft Flow Control is a kind of software. It is based on a certain operating system's flow control software and sometimes integrates functions such as gateway and vpn. For example, p2p Terminator, p2pover, and skiller in windows; ros, panabit, m0n0wall, sea spider, Coyote, and SmoothWall in linux.

What is "hardware-based soft routing and traffic control"

To answer this question, we must first explain why we do not need to build a "soft routing and soft traffic control hardware" because we do not have to use the hardware that has been customized by the company ". In fact, it is very simple because of the price. Aside from the software, stability, and service of the hard flow control, the hardware structure of the hard flow control is comparatively simple. Like Cisco, each of its wireless routes is expensive, but it does not sell hardware, but protocols and software. Therefore, there is a "soft routing and traffic control hardware" made by hardware and software ". That is, a system that uses a pc, server, or similar professional equipment for throttling. Similar functions of devices worth up to 100,000 of the total cost.

Project internal reasons

Similar to m0n0wall, m0n0wall is a free open-source firewall software with mature technology, outstanding performance, and complete functions. It is similar to a hardware firewall of less than 30 thousand, it has achieved good application results in the use of experimental schools. At present, most of the Campus Networks in Nanjing's primary and secondary schools use the network mode of a common vro connected to a common vswitch. The vro only implements the network access function, which undoubtedly increases the workload of campus network administrators, on the one hand, in order to ensure the network is smooth, it is necessary to disinfect computers on the network, on the other hand, it is necessary to urge all campus network access users to register online, with incomplete functions.

Nat is implemented through soft routing and traffic control hardware to ensure the security of the school website and network, restrict the download traffic of Internet users, and bind the mac address of Internet users to prevent arp viruses to ensure smooth network connection, at the same time, enable the network access authentication function on the soft route traffic control hardware, allocate the network access account and password to all Internet users, and enable real-name Internet access. In addition, the log receiving software is installed on the computer where the network monitoring software is installed to record the network account information on the soft route software flow control hardware, instead of the Internet register, as the online registration credential.

Project Cost

The prices of hard-flow control and general education have been customized by enterprises. Generally, the price is more than 10 thousand at the low end, more than 30 thousand at the middle end, and more than 50 thousand at the high end. When the city's network applications reach a certain level, traffic control needs to be generated and traffic control hardware procurement is required. The city is equipped with traffic control equipment, requiring a high amount of money. The hardware cost of soft routing and Soft Flow Control: the cost of hardware purchased on the Internet + Secondary Development of Software + software training, hardware installation, quality assurance, and maintenance is less than 1500 RMB per unit.

Analysis of Soft route soft flow control software and hardware-based projects

I. Soft Route Traffic Control Software

Soft route Soft Flow Control is a popular free software system based on the Open Architecture of FreeBSD. For example, the free software such as haispider, smoothwall, minifw, m0n0wall, panabit, and ROS can be further developed in Chinese, secondary development, and module plug-in development to meet the needs of Nanjing pujiao network applications. During the project process, we found that m0n0wall is the most suitable for application development and promotion. At present, Wu Jun, Pan honghui, Yuan Yongxin, Zhao Jia, Teng jianbing, Zhao Rui, Fan Xiangyang, Shen Cheng, and other instructors of Nanjing software studio soft route Soft Flow Control Software Project Team) he has been engaged in training, localization, secondary development, module plug-in development, and other projects. M0n0wall is a complete and embedded firewall software package plan. It can be installed on an embedded PC and provides all the important features of commercial firewall, including ease of use ), but the price is only a fraction of that of free software ). M0n0wall is based on FreeBSD's simplified version, including a web server mini_httpd), PHP, and other tools. The entire system configuration is stored in an XML file, which is clear. We believe that m0n0wall uses the first UNIX system configured in PHP at startup. This structure is better than shell script, and the entire system configuration is stored in XML format.

II. Introduction to "soft routing and traffic control hardware"

"Soft routing and soft traffic control hardware" generally has several architecture Methods: general PC-based architecture, server-based architecture, and low-cost traffic control-based restructuring. There are advantages and disadvantages for each of the three methods: ordinary PCs are cheaper. If old PCs are used, the cost is lower. However, server performance is not strong, stability is poor, space occupation and power consumption are high. rack mounting is recommended for servers, which has good performance and stability, but is less cost-effective and consumes much energy; low-cost traffic control, low energy consumption, high stability, and difficult restructuring. In addition, it is also built with a new custom industrial control chassis, with a slightly higher price, poor energy consumption, low cost performance, but convenient DIY and strong performance.