How to solve the port failure?

This is the most common hardware failure. Whether it is a fiber port or a twisted pair RJ-45 port, you must be careful when plugging and unplugging the connector. If the fiber plug is not carefully soiled, it may cause the fiber port to be contaminated and cannot communicate normally. We often see that many people like to plug and unplug the connector with electricity. Theoretically speaking, it is possible, but this also inadvertently increases the failure rate of the port. In addition, if you are not careful during handling, it may also lead to physical damage to the port. If the size of the purchased crystal head is too large, it is easy to damage the port when inserting the switch. If a section of the twisted pair cable connected to the port is exposed outdoors, in case the cable is struck by lightning, it will cause the connected switch port to be damaged or cause more unforeseen damage.
Under normal circumstances, a port failure is the failure of one or several ports. Therefore, after eliminating the failure of the computer connected to the port, you can determine whether it is damaged by replacing the connected port. In the event of such a failure, you can clean the port with an alcohol cotton ball after the power is turned off. If the port is indeed damaged, you can only replace the port.