Ethernet Support Guide (for HP-UX 11i v1, 11i v2)

Troubleshooting
Ethernet-Specific Information
Chapter 4
72
• To examine just the log messages in the log file, enter:
$ netfmt -f /var/adm/nettl.LOG000
• To check network logging and tracing status, enter:
$ nettl -status
• To start Ethernet tracing on the file /tmp/tracefile.TRC000, enter:
nettl -traceon all -entity gelan -file /tmp/tracefile
or
$ nettl -traceon all -entity igelan -file /tmp/tracefile
Note: nettl(1M) adds the .TRC000 postfix for you.
• To stop Ethernet tracing, enter:
$ nettl -traceoff -entity gelan
or
$ nettl -traceoff -entity igelan
• To format the Ethernet trace file into the file /tmp/traceout, enter:
$ netfmt -f /tmp/tracefile.TRC000 > /tmp/traceout
See the netfmt(1M) manpage for more information on how to create a filter for trace
formatting.
Basic Troubleshooting Tips
The following list provides some tips on troubleshooting common hardware problems.
Refer to this information when you are trying to identify Ethernet hardware problems.
• Check the network cables. Make sure the network cable connections are secure and
that the cables are not damaged. If you find any connections that are loose, or cables
that are damaged, fix the problem and then see if your computer can communicate
on the network.
• Check to be sure that configuration settings are correct. If you suspect that a card is
faulty, do the following:
— Use a different cable
— Move the suspected card to another PCI-X slot
— Check to be sure that your system has the correct driver version
— If the driver is the correct version, try re-installing it
— Reboot the system
• Verify that the device at the other end of the connecting cable is an Ethernet device,
and that it is receiving power.
• Check to be sure that the connecting cable is of the correct category and length.
• Check the Link LED on the La card bulkhead. If the Link LED is ON and there still
is a fault, at the HP-UX command-line, enter: dmesg and view the output on your
screen to see if any error messages exist.