Solutions for faults of Huawei switches caused by Network Viruses

Solutions for faults of Huawei switches caused by network viruses. in the Internet era, we often encounter common problems related to switches of Huawei. The following describes the knowledge about network viruses, including in-depth analysis of Huawei switch faults.

Huawei switch troubleshooting

When a layer-2 Huawei switch fails, we often need to restart the device to solve the problem. After all, the layer-2 switch rarely has hardware quality problems. According to this analysis, the author immediately cut off the power supply of the faulty switch, and re-connect the power supply after a period of time. However, after the Faulty Switch restarts stably, the faulty workstation that cannot access the Internet in the LAN immediately restores the normal network connection status.

I thought that some workstations in the LAN could not access the internet. Even if the failure of Huawei switches was solved successfully, who once thought that they would be there in an hour, the workstation that cannot access the Internet experienced the same Huawei switch fault again. When the Huawei switch was faulty again, I can see that all the signal lights in the control panel of the device are completely bright and do not flash, which indicates that the second-layer switch has the same fault.

After repeated tests and practices, I found that even if this layer-2 switch is not connected to any workstation, the same failure of the Huawei switch will occur in the same period of time. What is the reason? Why is another L2 Switch in the LAN always working normally?

Although I know that many wks in the LAN of this Organization have various network viruses, the two common L2 switches share the same brand and have the same connection method, even their configurations are the same, but now only one vswitch device has a problem, so I guess it must have been that the hardware of the Huawei switch has been damaged. To completely solve the problem, the only way is to replace the L2 Switch.

Because I have no ready-made switch devices to replace, I plan to thoroughly check the network viruses in the LAN. Before the new switch devices are in place, the entire lan network is very "clean" and there are no network viruses or Trojans.

After all the virus programs in the LAN are cleared, I restarted the faulty switch device. Then I saw that the faulty switch was working properly, because I had something to do at the time, I first left the Huawei switch fault site. When I went to work the next morning, I checked the working status of the Huawei switch failure, which surprised me, the status of the vswitch has been normal.

When I found a workstation system that was previously inaccessible to the Internet for testing, I found that their network connection status has now recovered. After a period of observation, their Internet access status remains normal. Now, the failure of Huawei switches that some workstations cannot access the Internet has finally been solved, the final "crash" that causes this fault is obviously a network virus in the LAN.

In-depth analysis of Huawei switch faults

On the surface, the above fault is caused by abnormal status of the L2 Switch in the LAN. In fact, the working status of the faulty switch is affected by the network virus, A network virus causes a broadcast storm on the LAN network. This causes an overflow error in the cache of the faulty switch, which eventually causes paralysis of the switch, this is also the reason that the signal lights of all ports of the faulty switch are in the Full Bright and non-blinking state.

After all the network viruses in the LAN are cleared, after the faulty switch is restarted, its cache overflow error disappears, and its working status can also be restored to normal, in the future, because the network virus will not continue to affect the switch, the faulty switch will always work normally.

In addition, the reason why another vswitch in the LAN is not attacked by a network virus is probably that the performance of the vswitch is relatively stable. In other words, the faulty vswitch device may suffer Component Aging, as a result, the faulty switch has a low capability to defend against network viruses. As a result, the two L2 Switches of the same model may not work in the same state.

To avoid such faults caused by network viruses as much as possible, we should try to use switches with stable performance and large cache capacity when establishing a LAN network; at the same time, genuine anti-virus software should be frequently used to clear Network viruses in the LAN and prevent the occurrence of broadcast storms.