IBM 621410U Hardware Maintenance Manual - Page 25

Ethernet controller troubleshooting chart, Ethernet controller problem, Suggested Action

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If you set the Ethernet controller to operate at 100 Mbps, you must use Category 5 cabling. If you directly connect two workstations (without a hub), or if you are not using a hub with X ports, use a crossover cable. Note: To determine whether a hub has an X port, check the port label. If the label contains an X, the hub has an X port. v Determine if the hub supports auto-negotiation. If not, try configuring the integrated Ethernet controller manually to match the speed and duplex mode of the hub. v Check the LAN activity light on the rear of the computer. The LAN activity light illuminates when the Ethernet controller sends or receives data over the Ethernet network. If the LAN activity light is off, make sure that the hub and network are operating and that the correct device drivers are loaded. v Make sure that you are using the correct device drivers, supplied with your computer. v Check for operating system-specific causes for the problem. v Make sure that the device drivers on your computer and the server are using the same protocol. v Test the Ethernet controller. The way you test the Ethernet controller depends on which operating system you are using (see the Ethernet controller device driver README file). Ethernet controller troubleshooting chart You can use the following troubleshooting chart to find solutions to 10/100 Mbps Ethernet controller problems that have definite symptoms. Table 2. Ethernet troubleshooting chart Ethernet controller problem Suggested Action The computer stops running when loading device drivers. The PCI BIOS IRQ settings are incorrect. Check the following: v Determine if the IRQ setting assigned to the Ethernet controller is also assigned to another device in the IBM Setup Utility program. Although interrupt sharing is possible 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 controller or the other device. v Make sure that you are using the most recent device driver available from the World Wide Web. v Run the network diagnostic program. The LAN activity light does not light. Check the following: v Make sure that you have loaded the network device drivers. v The network might be idle. Try sending data from this workstation. v Run diagnostics on the LEDs. v 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. Data is incorrect. Check the following: v Make sure that you are using Category 5 cables when operating the computer at 100 Mbps. v Make sure that the cables do not run close to noise-inducing sources like fluorescent lights. Diagnostics 17

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If you set the Ethernet controller to operate at 100 Mbps, you must use Category
5 cabling.
If you directly connect two workstations (without a hub), or if you are not using
a hub with X ports, use a crossover cable.
Note:
To determine whether a hub has an X port, check the port label. If the
label contains an
X
, the hub has an X port.
v
Determine if the hub supports auto-negotiation. If not, try configuring the
integrated Ethernet controller manually to match the speed and duplex mode of
the hub.
v
Check the LAN activity light on the rear of the computer. The LAN activity light
illuminates when the Ethernet controller sends or receives data over the Ethernet
network. If the LAN activity light is off, make sure that the hub and network are
operating and that the correct device drivers are loaded.
v
Make sure that you are using the correct device drivers, supplied with your
computer.
v
Check for operating system-specific causes for the problem.
v
Make sure that the device drivers on your computer and the server are using the
same protocol.
v
Test the Ethernet controller.
The way you test the Ethernet controller depends on which operating system
you are using (see the Ethernet controller device driver README file).
Ethernet controller troubleshooting chart
You can use the following troubleshooting chart to find solutions to 10/100 Mbps
Ethernet controller problems that have definite symptoms.
Table 2. Ethernet troubleshooting chart
Ethernet controller problem
Suggested Action
The computer stops running
when loading device drivers.
The PCI BIOS IRQ settings are incorrect.
Check the following:
v
Determine if the IRQ setting assigned to the Ethernet controller is also assigned to
another device in the IBM Setup Utility program.
Although interrupt sharing is possible 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 controller or the other device.
v
Make sure that you are using the most recent device driver available from the
World Wide Web.
v
Run the network diagnostic program.
The LAN activity light does
not light.
Check the following:
v
Make sure that you have loaded the network device drivers.
v
The network might be idle. Try sending data from this workstation.
v
Run diagnostics on the LEDs.
v
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.
Data is incorrect.
Check the following:
v
Make sure that you are using Category 5 cables when operating the computer at
100 Mbps.
v
Make sure that the cables do not run close to noise-inducing sources like
fluorescent lights.
Diagnostics
17