IBM eServer 250 xSeries, User Reference Manual

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IBM® xSeries 250: User’s Reference
• Check the Ethernet controller lights on the operator information panel.
These lights indicate whether a problem exists with the connector, cable, or hub.
— The Ethernet Link Status light illuminates when the Ethernet controller
receives a LINK pulse from the hub. If the light is off, there might be a
defective connector or cable, or a problem with the hub.
— The Ethernet Transmit/Receive Activity light illuminates when the Ethernet
controller sends or receives data over the Ethernet Network. If the Ethernet
Transmit/Receive Activity light is off, make sure that the hub and network
are operating and that the correct device drivers are loaded.
— The Ethernet Speed 100 Mbps light illuminates when the Ethernet controller
LAN speed is 100 Mbps.
• Make sure that you are using the correct device drivers, supplied with your
server.
• Check for operating system-specific causes for the problem.
• Make sure that the device drivers on the client and server are using the same
protocol.
• Test the Ethernet controller.
How 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.
Ethernet controller problem Suggested Action
The server stops running
when loading device drivers. The PCI BIOS interrupt settings are incorrect.
Check the following:
• Determine if the interrupt (IRQ) setting assigned to the Ethernet controller 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 controller or the other device. For
example, for NetWare Versions 3 and 4, it is recommended that disk controllers not
share interrupts with LAN controllers.
• Make sure that you are using the most recent device driver available from the
World Wide Web.
• Run the network diagnostic program.
If the problem remains, call for service.
Table 21. Ethernet troubleshooting chart.