Network troubleshooting: "Hope, smell, ask, cut"

"Hope, smell, question, cut" is a traditional method for diagnosing diseases in Chinese medicine, also known as "Four diagnoses ". The doctor uses these four methods to collect the symptoms of the disease. Through inductive analysis, he can understand the cause of the disease, the location, nature, and internal connection of the disease, and finally take the right medicine to remove the disease. Network administrators can use multiple methods to test and troubleshoot network faults, however, the troubleshooting process can be summarized as a word similar to the four diagnostic procedures of traditional Chinese medicine.

1. "Hope", see the color

"Hope", as its name implies, is observation and thinking. In the process of solving the fault, the word "hope" is very important.

"Hope" means to carefully observe the cause of the fault. Before solving the problem, the network administrator must clearly know what is wrong with the network, whether it cannot access the Internet, share resources, or access other computers. Find out which is the most important step for the successful troubleshooting of network faults, and know the cause to remedy the problem.

2. After looking at it, you need to "smell"

The "smell" here is not to use the nose to really smell, but to understand the computer fault process, from the user of the faulty computer to understand the situation.

Iii. "Ask", visit the health

In fact, the word "Question" can be contained in the word "cut. You can search, query, and query from multiple perspectives. For example, we can query through the Internet to learn how to troubleshoot related faults. When querying on a search engine, we can use several more keywords to search for them!

4. Patients with "cut", also diagnose the six pulse

"Cut" means finding the problem through "hope", "smell" and other stages, and then finding the right start point to get twice the result with half the effort. Through "hope" and "smell", you can get a basic understanding of Network Fault-related information. Through this information, you can analyze and make comprehensive judgments accordingly to find useful information.

Generally, the fault is not caused by hardware or software. First, list all possible causes of network faults. The Troubleshooting process is basically "soft first and hard". The most common cause of network failure caused by the operating system is incorrect Protocol configuration, any of the network parameter settings, such as the IP address, subnet mask, DNS server, and gateway, In the TCP/IP protocol may cause a fault. In terms of hardware, all possible causes are listed one by one. For example, if a hardware fault occurs, such as a nic, network cable, information outlet, or vswitch, any damage to the device may cause network connection interruption. Tests are conducted one by one based on the priority. (Before testing, check whether the indicators of various network devices are normal. The green light indicates that the connection is normal. The red light indicates that the connection is faulty. If the indicator is not bright, the connection is not connected or the line is disconnected. If the indicator is bright, the broadcast storm occurs, regular flashing of indicator lights indicates normal network operation ). Note that you can sort the causes by priority based on the possibility of errors, and then break them one by one. After some scrutiny, you can basically understand the problem.

"Wang, Wen, Wen, and cut" have their own unique roles in network management and cannot be replaced by each other. However, they must be organically combined in practical applications, in order to have a comprehensive, systematic, and in-depth understanding of the network situation, we can take the right action. In short, in the process of solving network faults, you should pay attention to "Hope, smell, ask, cut", pay attention to "both soft and hard", it will definitely get rid of the disease!

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