HP-UX Internet Services Administrator's Guide (August 2003)
Troubleshooting Internet Services
Troubleshooting Overview
Chapter 5100
• Does the problem affect all users? The entire node? Has anything
changed recently? The possibilities are as follows:
— New software and hardware installation.
— Same hardware but changes to the software. Has the
configuration file been modified? Has the HP-UX configuration
been changed?
— Same software but changes to the hardware. Do you suspect
hardware or software?
It is oftendifficult to determine whether the problemis hardware-related
or software-related. The symptoms of the problem that indicate you
should suspect the hardware are as follows:
• Intermittent errors.
• Network-wide problems after no change in software.
• Link-level errors, from logging subsystem, logged to the console.
• Data corruption—link-level trace that shows that data is sent
without error but is corrupt or lost at the receiver.
• Red light on the LAN card is lit, or yellow light on the X.25/800 card
is lit.
Following are symptoms that would lead you to suspect the software:
• Network services errors returned to users or programs.
• Data corruption.
• Logging messages at the console.
Knowing what has recently changed on your network may also indicate
whether the problem is software-related or hardware-related.
Diagnostic Tools Summary
Table 5-1 describes the most frequently used diagnostic tools.
Table 5-1 Diagnostic Tools
Tool Description
netstat
A nodal management command that returns
statistical information regarding your network.