Sun Microsystems 280R manual How to Diagnose Specific Problems, Network Communications Failure

What To Do

1.Press the Break key on your alphanumeric terminal’s keyboard, or enter the Stop-asequence on a Sun keyboard.

The ok prompt is displayed.

2.Set the desired diagnostics level, type:

ok setenv diag-level value

where value is off, min, max, or menus, as described in “About Diagnostic Levels” on page 167.

3.Reset the system, type:

ok reset-all

How to Diagnose Specific Problems

This section provides help in diagnosing specific problems you may encounter.

Network Communications Failure

Symptom

The system is unable to communicate over the network.

Action

Your system conforms to the Ethernet 10BASE-T/100BASE-TX standard, which states that the Ethernet 10BASE-T link integrity test function should always be enabled on both the host system and the Ethernet hub. The system cannot communicate with a network if this function is not set identically for both the system and the network hub (either enabled for both or disabled for both). This problem applies only to 10BASE-T network hubs, where the Ethernet link integrity test is optional. This is not a problem for 100BASE-TX networks, where the test is enabled by default. Refer to the documentation provided with your Ethernet hub for more information about the link integrity test function.

Chapter 6 Diagnostics, Monitoring, and Troubleshooting 187