Ethernet Controller Troubleshooting Chart - IBM eServer 240 xSeries User Reference Manual

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.
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.
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 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.
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.
Controller problem
The server stops running
when loading device drivers.
Action
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. (See "Resolving
configuration conflicts" on page 151.) 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. (Refer to Chapter 7, "Getting
help, service, and information" on page 161 for World Wide Web
addresses.)
Run the network diagnostic program.
If the problem still exists, have the system serviced.
Chapter 6. Solving problems
149