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.