1. Problem description
After a certain operating system in the production environment is connected to the network cable, the network port status of the system is DOWN, and the HBA card network card port status is normal, but it cannot be mutually trusted with the fiber switch
2. Troubleshooting
Check whether the server network card light is flashing normally.
Check whether the network cable and module have light.
Replace the network card module. Check whether it is normal.
Plug the network cable into the network card and plug another module.
If there is no problem, find the network group to check whether the switch port is in DOWN state.
Three. Solve the problem
After replacing the network card module, it is normal. After checking the HBA card, it is found that the module inserted in the HBA card is a network card module. The reason is that the engineer has inserted it incorrectly at the factory, and it is normal after replacing the module.
Four. Reason analysis
The engineer installed the module at will when it was installed on the shelf, causing the network to fail
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