HP-UX Internet Services Administrator's Guide (May 2010)

Table 5-1 Diagnostic Tools (continued)
DescriptionTool
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.)
ping
A utility under DUI that can help to identify problems on the PSI/800
board/card.
psidad
A diagnostic program that tests LAN connections to other HP computers.
rlb does not test a connection to an HP 1000 computer.
rlb
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.
x25check x25server
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.
x25stat
A command that uploads the firmware in case of problems with the firmware
on the board.
x25upload
A utility that sends informational messages regarding network activity to the
system console or to a file.
Event Logging
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.
Network Tracing
Diagnosing Repeater and Gateway Problems
If you are using a repeater, and hosts on either side of the repeater are having difficulty
communicating with each other, a repeater subsystem failure may have occurred. In
Figure 5-1, all of the systems on side A are able to communicate with each another. All
the systems on side B are able to communicate with each other. If communication is
cut from side A to side B, the repeater subsystem is suspect for causing the fault, because
it is the medium by which side A and side B communicate.
Troubleshooting Overview 77