IBM 8646 Hardware Maintenance Manual - Page 30

Ethernet controller troubleshooting chart, Ethernet, controller, problem, Suggested Action

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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 server. 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 server. 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 protocol. v 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. Table 3. Ethernet troubleshooting chart Ethernet controller problem Suggested Action The server stops running when loading device drivers. 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. 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 or sporadic. Check the following: v Make sure that you are using Category 5 cabling when operating the server at 100 Mbps. v Make sure that the cables do not run close to noise-inducing sources like fluorescent lights. 22 Hardware Maintenance Manual: xSeries 220 Type 8646

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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 server. 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
server.
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
protocol.
v
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.
Table 3. Ethernet troubleshooting chart
Ethernet
controller
problem
Suggested Action
The server stops
running when
loading device
drivers.
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.
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
or sporadic.
Check the following:
v
Make sure that you are using Category 5 cabling when operating
the server at 100 Mbps.
v
Make sure that the cables do not run close to noise-inducing sources
like fluorescent lights.
22
Hardware Maintenance Manual: xSeries 220 Type 8646