Intel's diagnostic software lets you test the adapter to see if there are problems with the adapter hardware, the cabling, or the network connection.
If you are not already at a DOS prompt, shut down the OS and start up MS-DOS*.
Insert the Intel CD or change to the installer directory that contains DIAG100.exe.
At the DOS prompt, type: DIAG100 and press Enter.
If you have more than one PRO/100 adapter in your computer, an Adapter Selection menu appears on the screen. From that menu, select the network adapter you want to test.
From the Main menu, select Test adapter and then select the type of test you want to run.
Repeat steps 3 and 4 for each PRO/100 adapter installed in the computer.
More information is available on the DIAG100 test utility.
The Intel PRO/100 adapter can send test messages to another Ethernet adapter on the same network.