Installation guide

Check the Ethernet adapter’s self-test results. The SHOW CONFIGURA-
TION printout is the most convenient display of the results. A "+" indicates
the adapter passed self-test.
Independent of the module’s internal self-test is an external loopback test.
The loopback test runs independently at power-up and its results are not
included in the self-test. That is, a DEBNI or DEMNA could pass self-test
but fail the external loopback testing. The results of the external loopback
testing are reported by the External Loopback LED on the module. It is a
green LED below the yellow Self-Test OK LED.
Open the front cabinet door. Noting the adapter’s card cage position
from the SHOW CONFIGURATION printout, locate the module in the
appropriate card cage and slot.
If the External Loopback LED is lit, the module passed the test. If this
LED is not lit, the module failed.
For more troubleshooting of the Ethernet adapter, see the DEC
LANcontroller 200 Installation Guide (DEBNI) or the DEC LANcontroller
400 Installation Guide (DEMNA).
Verification 8–9