IBM 847691U Hardware Maintenance Manual - Page 49

Diagnostic LEDs, are loaded.

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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 the 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 the serverGuide documentation for details about the operating system. Diagnostic LEDs: The server contains two diagnostic LEDs (one green, and one amber) on the Ethernet connector that is located at the rear of the server. 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. 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. Note The amber LED might remain lit if the link is broken during activity. IBM Netfinity 3000 - Type 8476 41

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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 the 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 the serverGuide documentation for details
about the operating system.
Diagnostic LEDs:
The server contains two diagnostic
LEDs (one green, and one amber) on the Ethernet
connector that is located at the rear of the server.
±
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.
±
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.
Note
The amber LED might remain lit if the link is
broken during activity.
IBM Netfinity 3000 - Type 8476
41