IBM Netfinity 4500R User Reference Manual page 159

Ethernet controller
problem
Ethernet Link Status light
does not light.
The Ethernet
Transmit/Receive
Activity light does not
light.
Data is incorrect or
sporadic.
The Ethernet controller
stopped working when
another adapter was
added to the server.
Table 21. Ethernet troubleshooting chart
Check the following:
• Make sure that the hub is turned on.
• Check all connections at the Ethernet controller and the hub.
• Check the cable. A crossover cable is required unless the hub has an X
designation.
• Use another port on the hub.
• If the hub does not support auto-negotiation, manually configure the
Ethernet controller to match the hub.
• If you manually configured the duplex mode, make sure that you also
manually configure the speed.
• Run diagnostics on the LEDs.
If the problem remains, call for service.
Check the following:
Note: The Ethernet transmit/receive activity LED illuminates only when
data is sent to or by this Ethernet controller.
• Make sure that you have loaded the network device drivers.
• The network might be idle. Try sending data from this workstation.
• Run diagnostics on the LEDs.
• The function of this LED can be changed by device driver load
parameters. If necessary, remove any LED parameter settings when you
load the device drivers.
Check the following:
• Make sure that you are using Category 5 cabling when operating the
server at 100 Mbps.
• Make sure that the cables do not run close to noise-inducing sources like
fluorescent lights.
Check the following:
• Make sure that the cable is connected to the Ethernet controller.
• Make sure that your PCI system BIOS is current.
• Reseat the adapter.
• Determine if the interrupt (IRQ) setting assigned to the Ethernet adapter
is also assigned to another device in the Configuration/Setup Utility
program.
Although interrupt sharing is allowed for PCI devices, some devices do
not function well when they share an interrupt with a dissimilar PCI
device. Try changing the IRQ assigned to the Ethernet adapter or the
other device.
If the problem remains, call for service.
Suggested Action
Chapter 7. Solving problems
Troubleshooting
147