Three switch congestion factors that cause slow network speed

Three switch congestion factors that cause slow network speeds. Many switch congestion problems are related to terminal computers, therefore, you must first understand the basic knowledge of terminal computer factors to prepare for future switch congestion.

Eliminate terminal computer Factors

At first, my friends suspected that this was only a problem with the terminal computer itself, resulting in a very slow access speed to the proxy server. Then, he opened the system running dialog box of the faulty computer and used the ping command to test the IP address of the proxy server. The test was unsuccessful. After a new IP address was changed, continue the network access test.

But the results are still the same. Is there a fault in the network connection line between the computer and the proxy server? A friend was a little worried. He immediately tried to pull out the crystal head of the network cable connected to the faulty computer and re-inserted it in the normal way.

Will the network cable itself be short-circuited or broken? Find a professional network testing instrument to test the connectivity of the network cable and find that the connection between the computer and the cable blocked by the switch is normal, it seems that the problem has nothing to do with the network cable connecting to the faulty computer.

After finding the terminal computer's own problems, a friend suspected that the computer system was faulty and planned to re-install the system. However, considering that the system had been re-installed for a long time, in addition, as long as the operating system can be started normally, its status will rarely affect the network connection status. Check the network connection status of other computers and decide to reinstall the system!

With this in mind, my friend opened another computer in the training room and tried to access the proxy server in the computer system. What never imagined was that he started from this computer, the access speed to the proxy server was not normal. Later, my friend tried to test the network access status of several computers and found that they were all as fast as snails. Obviously, this abnormal fault has nothing to do with the factors of the terminal computer itself, so the task of re-installing the operating system can be avoided.

Remove Proxy Server Factors

Since network access Tests on several end computers are the same as failures, will the proxy server be slow to respond, why does it fail to respond to the Internet requests of various end users? Considering that the agent server runs for a long time, its system resources are easily consumed. In this case, the agent server is slow to respond;

To this end, a friend decided to restart the proxy server system to release its valuable system resources. After thinking of doing so, a friend immediately rushed to the proxy server and started the system again. After the system was started successfully, the friend first conducted an Internet access test on the proxy server, the test found that this operation was normal, and then tried to access the data in the proxy server from the terminal computer. Who thought this method could solve the problem, this kind of effort has not achieved any effect.

Is it possible that the firewall in the proxy server is secretly working? In order to eliminate various possible factors, a friend decided to temporarily close the firewall program installed on the proxy server system to ensure that it will not affect the access of each terminal computer to the proxy server; however, when a friend temporarily closes the firewall program, he finds that the network access test of the terminal computer is still as slow as before, this shows that the failure of the network speed is not directly related to the firewall program installed in the agent server system.

After I disabled the network firewall, my friend found that it did not play any role and began to doubt whether there was a network virus in the proxy server system, in many cases, network viruses can create a variety of strange faults. Will this time the network virus switch block the network transmission channel to the proxy server?

To verify your conjecture, A friend found the latest version of anti-virus software and thoroughly inspected all corners of the proxy server system, during the scanning and removal process, my friend found some network viruses. After seeing these viruses cleared, my friend simply thought that the failure of normal access to the proxy server should automatically disappear, however, when we test the network access status again, we find that all faults are the same. This shows that the agent server is running normally.

Exclude network connection Factors

Through the above check, my friend found that after the proxy server system was restarted, the operation was smooth and there was no system crash. Moreover, starting from the proxy server, my friend could access the Internet normally, this indicates that the Internet channel is smooth; now the firewall program in the proxy server has been disabled.

The Network viruses are also cleared. The only thing that is not checked is that the network connection between the proxy server and the switch is not checked. Is it because the network connection Channel switch between the proxy server and the switch is blocked, so that other computers in the LAN cannot quickly access the data in the proxy server?

Therefore, my friend decided to check the network connection status between the proxy server and the switch blockage. He first opened the system running dialog box of the proxy server, and executed the ping command to test the IP address of the switch. He found that the IP address can be pinged and sometimes cannot be pinged, if a slightly larger data test package is sent to the switch blockage, the IP Address blocked by the switch cannot be pinged. It seems that the network connection channel between the proxy server and the switch blockage does have a problem.

Will the proxy server's intranet connection interface become loose? My friend planned to pull the network cable connecting to the Intranet from the Intranet Nic of the proxy server and plug it again to see if the intranet connection is loose? If you want to do this, immediately unplug the network cable that connects to the Intranet.

However, what surprised me very much was that when I plugged in the network cable again, my friend noticed that the network card signal immediately went into a flash and seemed to be constantly processing data information, just accessing the network, why does the proxy server suddenly receive such large data volumes?

Is the Intranet Nic abnormal? A friend was a bit skeptical, but opened the Device Manager window for the corresponding system, found the Intranet Nic device option, and right-click the device option, run the "properties" command from the shortcut menu to open the attribute setting interface of the Intranet Nic, and click the "General" tab, on the corresponding tab page, a friend found that the Intranet Nic is working normally;

Since the NIC device is normal, why is the signal lights of the NIC device always flashing? Is the switch blocking constantly sending data packets to it? A friend immediately arrived at the scene where the target switch was congested. According to the label descriptions pasted on each switch port, he found the connection interface of the proxy server's intranet Nic.

The result shows that the signal lights of the corresponding switching port are also in the Flash state. what's even more strange is that some switching ports are clearly not connected to network cables, however, the signal lights on these ports are still blinking. Is the switch blocked by a large data information switch?