Network Communications Failure; About Diagnosing Specific Problems - Sun Microsystems Enterprise 250 Owner's Manual

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About Diagnosing Specific Problems

Network Communications Failure

Symptom
The system is unable to communicate over the network.
Action
Your system conforms to the Ethernet 10/100BASE-T 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-T 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.
If you connect the system to a network and the network does not respond, use the
OpenBoot PROM command watch-net-all to display conditions for all network
connections:
ok watch-net-all
Diagnostics and Troubleshooting
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