Troubleshooting Hubs
A crossover cable can be used to identify the type of failure when hub performance or connectivity is in question.
To use a crossover cable:
1Connect a file server and a client PC
2To make a crossover cable, connect TD+ to RD+ and TD– to
The cable performs the crossover that is usually performed by the hub.
The following illustration compares the cabling pinouts for
If the file server and client PC function together as a small network, then either the existing cabling or the hub is failing.
When a crossover cable is used, the LED on the NIC functions differently than it would under normal operating conditions. For example, with a correct crossover connection, the LED lights, whereas with a
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