A solution to the problem of signal delay caused by the long span of network wiring

Units involved in the switch is not with a manageable switch, is a common switch, the popular argument is a fool switch. As a result of unit transformation, computer to the workshop is very large, must be in all departments have switches available to use. Because of the intense time, I ran to the top floor with the electrician. From computer, I introduced a network cable to a corner of the shop where the sales department is located, at that time, I was afraid of the network cable, electrician experience that this span is not 100 meters, rest assured that the use of it, coupled with my test line with the tester, found that the line is pass, indicating that there is signal transmission.

August 2 night Relocation, first placed sales department, insurance department, Accessories boutique, after-sale insurance total of 30 computers, network topology map structure as shown in the figure –1.

Figure-1 network topology Figure 1

The above description is more clear, set up, I myself on each computer to test the speed of the situation and access to the server situation, did not find the problem of delay, the speed is relatively fast. Electrician busy after the hands of the work, but also surfing the Web page to find that the speed is really good. August 3 Around one o'clock in the afternoon, all the computers relocated to the workshop were delayed, relatively slow, and sometimes can not open the Web page, can not access the server, I am a bit puzzled, there are problems, I pulled from the computer to the sales corner of a network cable from the switch pulled down directly into a computer network card interface, It is acceptable to find that the speed of the Internet is not found to be delayed. I don't like to discuss a problem or test it slowly to find the source of the problem. I often do a thorough solution is direct pull, add network equipment, so do not know the problem.

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I pulled a wire from computer to the tool library, from the tool of a network cable to C general Office, you may ask why I do not directly pull a wire to C office, because I am not sure whether this distance is more than 100 meters, the above network cable does not mark how many meters ah, I want to do a conversion interface in the tool library to connect to the C General Office of the network cable, that is, the total distance of more than 100 meters, there is a switch interface is not worried about the limits of this distance. Perhaps you will ask is not as direct as the computer to the sales corner in the middle of the network to make a switch interface does not get, in fact, I would like to know whether the network cable distance too long caused by this bottleneck, good summary of relevant experience, this is our technology to the question of the view bar.

After the conversion interface, I put a 8-port switch in the C general Office, a sales corner of the switch, a C total computer, why put such a small switch, and do not enlarge the switch, can be driven up, I think the ordinary switch, nothing but the port how much the problem is not to be able to drive the problem of the following switch , unlike a manageable computer, it has a core layer, a converging layer, and an access layer. August 3 off work, after the sale of the front desk, the settlement room, customer lounge also put the computer. Topology Diagram-2. Because in the C general office put a switch, the speed is obviously improved, indicating that the computer to the sales front corner of the distance span is indeed very long, affecting the network transmission rate. After all, there are several switches in a local area network, which cannot help but take into account the broadcast storm, given the small number of computers on the LAN and the lack of large data to handle, so the likelihood of a broadcast storm is not very high.

Figure-2 network topology complete Figure 2

The topology diagram above shows the most complete network topology of the unit to date. A total of five layers of switches can be used altogether, the book says the cascade switch is up to four layers, five-layer switch in the use of the process also did not appear any problems, buy our network equipment Technicians said: "Ordinary switches want to pick up a few, down the continuation of how many can, as a can expand the transmission of the signal port." The network transmission problem is really simple, only the network cable span too long caused the transmission congestion problem, adjust the length of the line can directly solve the problem, I hope that a common network wiring can bring you some harvest, 1th: The line too long does affect the speed of the problem, can not because of the network test instrument can be measured through, It means there's no problem with the signal. 2nd: The ordinary switch can connect five layer switch, can solve the signal transmission problem caused by the line too long. Due to the mistakes of time is unavoidable, please try to point out the shortcomings of Bo friends. I think only practice can come to a conclusion and share our relevant experience with you.

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