Installing and Administering Internet Services

468 Chapter12
Troubleshooting Internet Services
Diagnostic Tools Summary
Diagnostic Tools Summary
The most frequently used diagnostic tools are listed below. These tools
are documented in the link installation manuals.
Table 12-1 Diagnostic Tools
netstat
A nodal management command that returns statistical information regarding your
network.
landiag
A diagnostic program that tests LAN connections between HP 9000 computers.
linkloop
A diagnostic program that runs link-level loopback tests between HP 9000
systems. linkloop uses IEEE 802.3 link-level test frames to check physical
connectivity with the LAN. This diagnostic tool is different from the loopback
capability of landiag because it tests only the link-level connectivity and not the
transport-level connectivity.
ping
A diagnostic program that verifies the physical connection to a remote host and
reports the round-trip communication time between the local and remote hosts.
(Type man 1M ping for more information.)
psidad
A utility under DUI that can help to identify problems on the PSI/800 board/card.
rlb
A diagnostic program that tests LAN connections to other HP 9000 computers.
rlb does not test a connection to an HP 1000 computer.
x25check
x25server
These two work in tandem. x25server runs on the logically remote host (could
be same physical host) and echoes packets sent to it over the X.25 network by
x25check.
x25stat
A nodal management command that returns status and information from the X.25
device and card. It provides interface status configuration information and virtual
circuit statistics.
x25upload
This is used to upload the firmware in case of problems with the firmware on the
board.
Event Logging A utility that sends informational messages regarding network activity to the
system console or to a file.
Network Tracing A utility that traces link-level traffic to and from a node. HP recommends that you
enable tracing only when troubleshooting a problem unsolved by other means.