HP X.25/9000 User's Guide HP-UX 11i v3 (5900-1523, August 2011)

8 Troubleshooting
Troubleshooting your X.25 link
This section describes troubleshooting procedures for checking your X.25 link up to X.25 level 3.
It also provides information on troubleshooting IP over X.25, as well as procedures for diagnosing
switching problems. To use these procedures you should be familiar with the following commands:
Table 39 Troubleshooting commands
Refer to...PurposeCommand
man pages and examples at the end of
“X.25 Configuration files and
examples” (page 144)
Initializes X.25 interface and software.
Superuser only.
x25init
man pagesSafely shuts down the interface.
Superuser only.
x25stop
man pages and “Diagnostic utilities”
(page 77) for examples
Reports on X.25 status. Some options
are for superuser only.
x25stat
man pages and “Diagnostic utilities”
(page 77) for examples
Tests connectivity up to X.25 Level 3
between local and remote nodes.
x25check x25server
man pagesTests IP to IP connectivity.ping
man pagesChecks that X.25 interface can reach
the remote server.
x25ping
man pages and “Tracing and logging
utilities” (page 118) for examples
Traces and logs X.25 at X.25 packet
and LAP B levels
nettl
man pages and “Tracing and logging
utilities” (page 118) for examples
Formats trace information collected by
nettl.
netfmt
man pages and “Tracing and logging
utilities” (page 118)
Logs X.25 event messages.strace
man pagesReceives error messages from the
Streams log driver.
strerr
man pagesDisplays configured IP interfacesnetstat
man pagesDisplays IP interface statusifconfig
If you still have problems after using the troubleshooting procedures in this section, ask the System
Administrator of the remote host to check the X.25 link using the same procedures.
If you have difficulties with high-level network software, refer to the appropriate troubleshooting
manual for the particular software product.
This section includes the following troubleshooting flowcharts:
• Hardware check
• X.25 configuration check
• IP over X.25 check
This section also includes information on recovering from a power failure.
Troubleshooting flowcharts and procedures
The following pages provide flowcharts and procedures for troubleshooting common problems.
Begin with Flowchart 1. If you are running IP over X.25, you should also refer to flowchart 5.
Troubleshooting procedures begin with the x25stat command. If x25stat -d [devices]
-f returns a level 2 link state other than “normal,” there is a problem.
130 Troubleshooting