Internet cafe fault experience

A workstation in an Internet cafe is faulty. The problem is that "when the workstation is started, the NIC light is not on, and the host is opened several times more than normal, but a phenomenon is found during normal operation, only one light is on when the switch is connected. We all know that under normal circumstances, the switch lights are on three, but I only light an intermediate light. If the network card breaks down in a diskless workstation, or are there problems with poor work? 2. In a diskless workstation, if the boot chip breaks down, or the contact is poor, or the inner part is damaged. What will happen? 3. In a diskless workstation, if the network cable or crystal head is damaged or the contact is poor, what problems will happen?

It is quite common that many people have encountered this kind of thing without a disk. Sometimes one or two machines are not normal, or some machines are always faulty at random, this question is not a one-sentence explanation of all problems, so it has long been confusing many outstanding diskless masters and network administrators, to really handle it, you must read all my content and understand my ideas.

1. Line: Generally, we use five types of lines. The working mechanism of these lines is the same as that of the excellent lines. The network adapter and switch send and receive signals, but the signals are the most basic elements of current. When there is a disk, most of the data on the line is sent and received through the local network and the Internet, however, the diskless mode adds a large amount of data, so the current ratio through the network cable is basically a disk of diskless, and the copper core in the network cable also forms an aging mode with the current ratio, generally, a cable with a disk can be used for more than five years, but a cable without a disk can only be used for more than three years. Here, we need to follow the brand of our own network cable. Of course, there must be an error in time, I will only talk about it here). Then there are several problems. In general, the use of the MB mode on the diskless client is generally less problematic, A Gigabit diskless workstation can be used with eight cables in the network cable. If one problem occurs, it is easy to use blue or card machines. For example, seven communications are normal, but the speed of one communication cannot keep up with the other seven, due to aging problems. However, most people use the tester for testing, and I believe that the tester will not only test whether the line can pass, but cannot test the quality when the signal passes, in addition, the contact surface of copper headers in many tests is relatively large, and sometimes the result of the test line passing through but the computer fails often occurs, so the degree of trust in the test line cannot be too high, this is only a reference.

2. Crystal head problems many people's Internet cafes always have some fixed machines, love blue or abnormal. The fault of the new crystal head is still the same. Why? I have learned from many years of experience that it is very random for many Internet cafes to buy enough crystal heads or even cheap ones. I once visited an internet cafe opened by a friend, the line tests made with the new crystal head of the new line cannot be tested, or the machine cannot be connected, or the problem is abnormal, and a lot of people are killed, when you buy a crystal head, you must pay attention to the RJ45 standard crystal head. The market is about 7 hairs, or simply buy 6 types of crystal heads, 1. The use of around 5 yuan can ensure that the line is normal, cheap goods generally used for a few months after the basic problems, because the crystal head copper contact piece of impurities, serious aging, and network card contact problems often occur. If you are not afraid of interruption, you may be afraid of virtual connection. failure cannot be checked, which will affect the ideas of the repair personnel.

3. Nic, we generally trust NICs, because the failure rate of NICS is very low, but we all love to ignore a problem. The copper contact sheets in the NIC line interface are also aging, although it is very slow, but because it is a place where dust and wet air love to go, so we often ignore the NIC cleaning problem, we remember to take a rubber when changing the network cable, wipe the copper contact pieces of the network card carefully and then connect the network cable. It is good to get into the habit, because the above copper oxide does not handle the final result is similar to that of the cheap crystal head.

4. Nic chip problems. Most Internet cafes occasionally encounter Nic chip errors and garbled characters when the machine starts. This problem is also common. My advice for this kind of fault is, after installing the NIC, discharge the COMS of the machine, and then configure the COMS settings of the new computer, I will not talk about it much, the writing head is big, typing is very tired.

5. vswitch: the principle of recording. As long as you change the line, you must take the rubber to wipe the copper pieces in the interface and clean up the debris. The principle is the same as above.

6. Contact Problems. When installing the NIC on the main board, you should note that you should have some experience. Try to pick the PCI slots that are relatively tight after insertion. You must change the slot in case of a fault. Remember) do not believe that the PCIe slot can be used for a long time. The truth is the same.

7. server problems: heavy. It is strongly recommended that the server use 6 types of lines and 6 types of crystal headers, because the server has the largest data volume and the lines become more serious after aging. Due to the Gigabit usage, therefore, all the eight lines must work well. If the quality of communication between one and the other is poor or the other is slower than that of the other, the one-shot server will occasionally crash. It is recommended that the server line be replaced once a year.

At this time, there are all fault traps. For example, if there is a problem at the switch port, you must change the network cable, and the nic and crystal head must be faulty, if the NIC is faulty, you need to change the line header on the vswitch. In addition, some machines may encounter a rare chip error during the first network card security. It can be said that there are a lot of experts trapped here. Therefore, when such a strange phenomenon occurs, you must ensure that you can find the fault point in every process.

Make line, workstation MB of about 1 year and a half replacement of the crystal head, according to the quality of your crystal head, the server will change once a year, strict Nic, switch line change will clean up impurities. In order to ensure that the problem does not occur first.

Note: If the connector of the switch and network card is wiped and the crystal head of the line meeting the specifications is replaced, when the network card is installed, the fault still persists after COMS discharge, please pull a temporary new line to test the machine. Do not trust the tester too much.

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