Qijian sun-Yue Jian-network testing ensures smooth operation of the data center (1)

Bkjia.com exclusive report: as an essential part of data center construction, network testing plays a role as a "judge" in the process of data center Establishment, acceptance, operation and maintenance. Sun, month, and sun are the brightest swords in the seven swords. The reason why we compared Sun and Moon to machine room testing is that we hope that the machine room testing work will show all the hidden problems like the bright sun and moon swords. Eliminate potential risks in the IDC room during testing.

Definition of Network Test

Most network administrators define a network test as a cable acceptance test or sudden Network Fault Diagnosis. What I often hear is that our network has been tested, there are also reports. Some friends often call me and say that our company's network is very slow over the past two days. You can test it for me. It is true that the network Acceptance Test and Network Fault Diagnosis must be done and are also an important part of the network test scope. However, the definition of network test is not just these two items.

With the development of network technology, both the increase in bandwidth and the growth of applications have put forward higher requirements for Network Testing Technology. If I want to define a network for testing, I think network testing is a system that guarantees the full 7-layer network lifecycle.

The same is true for networks. We divide the network lifecycle into four stages: planning and design, installation and deployment implementation, daily maintenance, and optimization and upgrade, network testing plays an important role in these four stages. During the design and planning period, clear network application requirements and test standards and future upgrade expectations should be defined, in this way, the network management personnel of network construction and installation personnel can be consulted in the future, which is called the initial network document. The network installation and construction phase is an integration process. Devices with different technologies from different manufacturers are integrated, standard-based cabling and network authentication tests need to be performed from component selection, various network cables and equipment testing, verification testing during cabling and installation, and completion of construction, to ensure the quality of network construction and the return on investment. Most of the routine maintenance stages are based on three behavior models: routine detection, troubleshooting, and long-term monitoring. The so-called routine inspection is to perform routine maintenance and testing on the network infrastructure according to the weekly and monthly periods, discover potential faults in advance. One of the three purposes of long-term monitoring is to discover potential network faults in the early stage, and the other is to trace the fault data. For some occasional faults, they do not exist for a long time and it is difficult to locate the fault source, long-term monitoring is required to trace the fault source. The third goal is to prepare for optimization and upgrade, identify network performance bottlenecks as soon as possible, and formulate network upgrade solutions. Network troubleshooting is not explained much. This is the most basic and initial role of network testing. The optimization and upgrade phase actually includes part of the design planning and installation implementation, and the network testing is the same between the left and right sides. It is necessary to ensure that the network performance after the planning and upgrade meets the application requirements, it is necessary to verify whether the upgraded network meets the standards and meets new application requirements.

Network Testing Techniques include multiple classification methods, active and passive tests, online handheld tests, and layer-7 networks. The main test technology of the physical layer is the verification and certification of copper optical fiber, the main basis is GB50312-2007 and optical fiber application testing standards, wireless network verification testing technology, it is used to evaluate and test the performance of the network physical layer during the network installation period and network transformation optimization.

The third-layer network access performance certification test is based on GBT21671 national lan acceptance standard. The network performance analysis and evaluation are conducted at the end of network installation and deployment, it also evaluates the performance of basic network application services. It is also used for network performance tests before network upgrade and optimization, and for network performance reauthentication evaluation after upgrade and optimization.

The most common analysis and testing of the network application layer is the network packet capture and decoding protocol analysis technology based on the full-line speed, this ensures real-time analysis of network data, massive storage for network data tracing, and security forensics of network data. The network application layer monitoring mainly applies the long-term monitoring mode.