Ethernet Controller Troubleshooting Chart - IBM xSeries 230 6RY Hardware Maintenance Manual

v Determine if the hub supports auto-negotiation. If not, try configuring the
v Check the Ethernet controller lights on the operator information panel.
v Make sure that you are using the correct device drivers, supplied with your
v Check for operating system-specific causes for the problem.
v Make sure that the device drivers on the client and server are using the same
v Test the Ethernet controller.

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 1. Ethernet troubleshooting chart
Ethernet controller problem
The server stops running
when loading device drivers.
Ethernet Link Status light
does not light.
integrated Ethernet controller manually to match the speed and duplex mode of
the hub.
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 bad
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.
server.
protocol.
How you test the Ethernet controller depends on which operating system you
are using (see the Ethernet controller device driver README file).
Suggested Action
The PCI BIOS interrupt settings are incorrect.
Check the following:
v 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.
v Make sure that you are using the most recent device driver available from the
World Wide Web.
v Run the network diagnostic program.
Check the following:
v Make sure that the hub is turned on.
v Check all connections at the Ethernet controller and the hub.
v Check the cable. A crossover cable is required unless the hub has an X
designation.
v Use another port on the hub.
v If the hub does not support auto-negotiation, manually configure the Ethernet
controller to match the hub.
v If you manually configured the duplex mode, make sure that you also manually
configure the speed.
v Run diagnostics on the LEDs.
19
Diagnostics