Common Failures Of Switches And Their Solutions

- Nov 26, 2020-

In network hardware equipment, switch failures are relatively rare. Here we summarize the common failures of switches. Hope it can be useful to everyone.


1. Cause of failure:


After connecting a workstation to the switch, other computers cannot be pinged through, and the "local connection" icon on the desktop shows that the network is blocked. Or the connection time on a certain port exceeds 10 seconds, which exceeds the normal response time of the switch port.


Reasons and solutions:


Using the method of restarting the switch can generally solve the problem of the port not responding. But if the port fails, the access port needs to be replaced.


2. Reasons for failure:


After connecting a workstation to a few ports on the switch, other computers in the LAN cannot be pinged, but the "local connection" icon on the desktop still shows network connectivity.


Reasons and solutions:


First check whether the computers being pinged have a firewall installed. The three-layer switch can set VLAN (virtual local area network). Workstations in different VLANs cannot ping through without routing. Therefore, you need to modify the VLAN settings to make them in one VLAN, or set up routing to enable communication between VLANs. .


3. Reasons for failure:


All computers connected to a certain switch cannot communicate with other computers in the network normally.


Reasons and solutions:


This is a typical switch crash, which can be solved by restarting the switch. If the fault persists after restarting, check all the computers connected to that switch and see the status of each computer disconnected one by one. Slowly locate a faulty computer, and you will find that it is mostly a network card on a certain computer. Caused by failure.


4. The cause of the failure: a port of the switch with network management function becomes very slow, and finally the entire switch or the entire stack slows down. Check the status of the switch through the console, and found that the buffer pool of the switch has grown very fast, reaching 90% or more.


Reasons and solutions:


First, you should use another computer to replace the original connection on this port to see if it is caused by the network failure of the computer connected to this port. You can also reset the wrong port and restart the switch. Occasionally, this port may be damaged.