The job of the network management level is to ensure the normal work of the network, so that the work of employees is not interrupted. The problem is that things do not always develop according to ideal conditions. In fact, there is often a situation where the ground rises. There are many reasons in between, here we only discuss 10 more common network management errors.
1. Use of UPS (Uninterruptible Power Supply) A store is squeezing the last life of its network system. Although the very old server is almost impossible to meet the needs of store operations, the operator is not even willing to replace the battery in the UPS. In fact, the battery should be replaced every two years. Finally one day there was a sudden power outage, and this UPS is too old, it can no longer control the server to shut down safely. Most of the battery's energy is already exhausted, so it quickly runs out of power. As a result, the controller that prevents abnormal conditions fails to shut down the server normally. The normal operation and transactions of the store depend on this server. It took three days to repair the server, and it took longer to make up for the losses. In fact, a battery worth only $ 75 can effectively avoid the above-mentioned things.
2. Didn't sort out what was needed. A phone call came into the company's headquarters to say that there was a problem with a branch server. The network administrator flew out of the office and drove to the accident site for an hour. As a result, he found that part of the operating system files were destroyed, so that all he could do was to reinstall the operating system. The network administrator of the branch company couldn't find the installation disk for a while, it doesn't matter, the administrator of the headquarters has, but in his office-one hour one way and two hours round trip from here. Pack up a backpack and take it with you. Everything you may need, including the backup of the operating system used by your users, should be in your backpack. This is easy to do and does not cost anything, but it can play a key role in updating the operating system and the like.
3. The server connection of a machine manufacturer failed to install the patch, so that all employees lost contact with their files, and production was forced to stop for two days. Serious losses! A newly hired network administrator is responsible for resolving this crisis. He quickly discovered that the previous network administrator did not install the patch when he installed the system three years ago.
Patches are provided free of charge, maybe they are not open, but they are usually very easy to configure, any system administrator can do it. The previous administrator said that because the system is running well, there is no need to patch. This statement is obviously very irresponsible.
4. Improper backup work. A server that stores many files in an office fails. Because no information can be accessed on the server, the operation of the office has basically stopped. The network administrator immediately took out a tape of the backup document and tried to repair it. When she discovered that the strap was empty, her heart sank. She checked the other backup tape and it was completely empty! She checked the office log and found that her colleagues changed the backup tape every day for two years, but the tape was put into a server that never installed backup software. No one knew that the backup had problems, because no one had checked it, but only two. During the year, insist on replacing the blank backup tape every day. This incident caused the company a heavy loss. In fact, as long as any database administrator does a simple backup check to avoid this major problem. In fact, they are doing this every day.
5. Inferior cable line engineering A unit's network often has problems. For this reason, they specially checked the wiring box. During the inspection, it was found that many RJ-11 and RJ-12 plugs were inserted into RJ-45 sockets. . Moreover, a toothpick is inserted in each socket, so it is no wonder that the wiring of the cloth will cause problems. Many network problems are attributed to improper cable connections, so savvy managers are better off having cable licenses that are licensed, guaranteed, and trustworthy cable line contractors.
6. There are too many hand-offs of the device, and the internal structure is a problem. A company bought a brand-name server, but the problem occurred when it started working. The network administrator requests assistance from operating system vendors and hardware vendors. It was later discovered that the reseller who provided this "brand-name" server configured the server with non-brand-name memory, non-brand-name disk controllers, and non-brand-name external disk drives only because these components were cheaper. The hardware manufacturer and operating system manufacturer refused to provide support because the server was confused by some non-brand components and its structure was not easily identified.
7. An office without signing an authorization contract spent a lot of cash last year to purchase the server. The system has RAID 5 redundancy protection, dual power supplies and 24 × 7 support, and a year later, the drive broke. The staff who guaranteed 24 × 7 support came, he called the hardware manufacturer, and the manufacturer asked him what the contract number was, and the office had not signed an authorization contract before. "It doesn't matter," the manufacturer said. "They have two years to go before the license expires. I will replace the drive for you within five or six days."
However, the tolerance of the manufacturer is far from enough, it is best to ensure that you have a full set of 24 × 7 support, go to an office supply store to buy a label, write the authorization contract number and technical support phone number on each label, and then put them Posted on every machine.
8. The test environment was not established a few years ago, a software development company installed a new workstation, which uses the fastest random access memory, the fastest hard drive and the fastest processor, it will serve as a director Long new workstation. Shortly after the installation was completed, the chairman accepted a request from his largest partner company to use it to test the communication platform of the new man-made space station. The result was a blue screen. When he restarted his computer when he was surprised, the information stored inside was gone. After rebuilding the system, it took him another four days to get rid of the pile of operating instructions.
The chairman of another company is smarter and built a test network. Before the system is upgraded, they will do experiments on the test network, find errors again and again, and set up the network repeatedly to test until it is completely correct. Only when the test results are completely correct will they really start the system upgrade.
The chairman of the first company no longer uses his server as a tester.
9. When storage capacity is not planned, when a company bought a server five years ago, the server can support six 8G-byte RAID Array 5 drives. To save money, the company insisted on buying only four 4G-byte drives. The network administrator said that they would need more space soon, and the company eventually compromised and bought two more drives, which ended the matter. After three years, they had a serious shortage of space, and they even had to delete small files with only 50K bytes. They desperately needed to expand capacity, and 8G-byte drives were not available at the time, and larger servers could not support them. A new additional subsystem that can solve this problem will require more money than the original server. In this way, they had to replace the server two years earlier than planned. Therefore, a good storage capacity plan will save you money and may even greatly extend the life of your system.
10. Misoperation is the biggest hidden danger. In the afternoon, the office power was suddenly cut off. The nervous office manager thought it would damage their two servers, so he took quick action-he walked over and turned off the servers. When he returned home, he was also proud of his quick action. But the next morning, when he returned to the office to open the two servers, he found that there was nothing in it. In fact, when he pressed the server switch yesterday, the server was performing a complex update of critical files. When he suspended the work of one server, it affected the storage of the critical database of another server. As a result, it took two days to repair the network.
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