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Troubleshooting

Troubleshooting Your X.25 Link

Chapter 8206

Note 5-1 – ping

Use ping on your own IP over X.25 address, for example:

ping 195.25.0.13

Do not use aliases (for example, as defined in/etc/hosts), since this

may introduce other errors.

Use the

Break key or Ctrl-C to terminate ping if you have not set the

number of packets with the -n option.

Note 5-2 – Checking your IP over X.25 Configuration

If ping returns errors such as “100% packet loss,” or “Network

Unreachable,” use x25stat -a to check your address configuration. The

most likely causes of problems are:

• No IP address was specified when X.25 was initialized (either in the

X.25 configuration file or as a command line option to the x25init

command).

• IP to X.121 address mapping has not been initialized (using the -a

option with the x25init command).

• The IP address is incorrect.

• The mapping of your IP address to your X.121 address is incorrect.

Check the IP to X.121 map table file (the default file is

/etc/x25/ip_to_x121_map).

If no IP communication is possible (ping to a local IP address fails) and

netstat -a shows no entries despite the fact that x25init reported a

successful IP mapping, the likely cause is:

•the device=x25_card_device parameter has not been added to the

/etc/x25/ip_to_x121_map file. See the section, “IP-to-X.121

Address Mapping Table” in this chapter.

You can also use the netstat command with the -r option to get

information about IP addresses associated with a particular interface.

Note 5-3 – Exit

Your local IP over X.25 configuration is correct. You can use ping to

verify connections if the remote host:

• is operational,

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HP CommonIO Products Bedienungsanleitung Seite 206