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 the illustration below, all of the systems on side A are able to communicate with one 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, since it is the medium by which side A and side B communicate.

Figure 12-1 Troubleshooting Networks that Use Repeaters

The same concept holds for communication through a gateway. If you suspect a gateway problem, try the following procedures:

To determine if you are set up to communicate with the desired node, execute the following:
netstat -r
To obtain routing statistics, execute the following:
netstat -rs

The statistics could indicate a bad route, suggesting a problem with a gateway node. If so,

Check with the node manager of the gateway node to ascertain proper operation of the gateway.
You can detect problems with the X.25 line by the number of errors shown when you execute the following:
x25stat -f -d /devicefile

For more information on troubleshooting gateways, refer to the appropriate link manual. For information on repeaters, refer to the HP-PB LAN Interface Controller (LANIC) Installation Manual.

Diagnosing Repeater and Gateway Problems

Technical documentation

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