IBM 867431X Hardware Maintenance Manual - Page 27

Troubleshooting the Ethernet controller, Network connection problems

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7. Select 1 - Update POST/BIOS from the menu that contains various flash (update) options. 8. When prompted as to whether you want to save the current code to a diskette, select N. 9. When prompted to choose a language, select a language (from 0 to 7) and press Enter to accept your choice. 10. Do not reboot your system at this time. 11. Remove the BIOS Flash Diskette from the diskette drive. 12. Turn the server/workstation off. 13. Move the jumper on J19 to pins 2 and 3 to return to normal startup mode. 14. Restart the server/workstation. The system should start up normally. Troubleshooting the Ethernet controller This section provides troubleshooting information for problems that might occur with the 10/100 Mbps Ethernet controller: Network connection problems If the Ethernet controller cannot connect to the network, check the following: v Make sure that the cable is installed correctly. The network cable must be securely attached at all connections. If the cable is attached but the problem persists, try a different cable. 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 Make sure that you are using the correct device drivers, supplied with the server/workstation. v Check for operating system-specific causes for the problem. v Make sure that the device drivers on the client and server/workstation 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. Diagnostics 19

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7.
Select
1 - Update POST/BIOS
from the menu that contains various flash
(update) options.
8.
When prompted as to whether you want to save the current code to a
diskette, select
N
.
9.
When prompted to choose a language, select a language (from 0 to 7) and
press
Enter
to accept your choice.
10.
Do not reboot your system at this time.
11.
Remove the BIOS Flash Diskette from the diskette drive.
12.
Turn the server/workstation off.
13.
Move the jumper on
J19
to pins 2 and 3 to return to normal startup mode.
14.
Restart the server/workstation. The system should start up normally.
Troubleshooting the Ethernet controller
This section provides troubleshooting information for problems that might occur
with the 10/100 Mbps Ethernet controller:
Network connection problems
If the Ethernet controller cannot connect to the network, check the following:
v
Make sure that the cable is installed correctly.
The network cable must be securely attached at all connections. If the cable is
attached but the problem persists, try a different cable.
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
Make sure that you are using the correct device drivers, supplied with the
server/workstation.
v
Check for operating system-specific causes for the problem.
v
Make sure that the device drivers on the client and server/workstation 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.
Diagnostics
19