IBM Netfinity 3000, User Handbook Manual, Page: 252 / 370

Troubleshooting
If the Ethernet activity light is off:
a. Make sure that the hub and network are operating, and that
the correct device drivers are loaded.
b. There might be a defective Ethernet connector or cable, or a
problem with the hub.
3. Make sure that you are using the correct device drivers that
come with your server.
4. Check for operating system-specific causes for the problem.
5. Test the Ethernet controller or adapter.
How you test the Ethernet controller or adapter depends on
which operating system you are using. Refer to your
ServerGuide documentation for details about your operating
system.
Diagnostic LEDs
Your server contains two diagnostic LEDs (one green, and one
amber) on the Ethernet connector that is located at the rear of the
server.
Ÿ
When the green LED is on, it indicates that the Ethernet
controller or adapter is connected to a hub or switch and is
receiving link pulses. If this LED is not on, check all
connections at the controller or adapter and the hub. Make sure
that the hub is transmitting at the correct speed, and that the
drivers are loaded.
Also, make sure that you have the correct wiring configuration
for the controller or adapter to the hub connection. Some hubs
require a crossover cable rather than a straight-through cable.
Notes:
1. This LED is also known as the Link OK light.
2. The green LED is on when you run the diagnostics loopback
test without a cable attached to the controller or adapter.
Ÿ
When the amber LED is on, it indicates that the Ethernet
network is operating at 100 Mbps. When this LED is off, it
indicates that the Ethernet network is operating at 10 Mbps.
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Netfinity 3000 User's Handbook