Digital Equipment DECstation 5000/100 Series, Maintenance Manual

Page: 341 / 392

External Loopback Test
The external loopback test checks the Ethernet controller and
its connection to the network.
Before you run the external loopback test on the base system
Ethernet controller, first install a ThickWire loopback connector
on the Ethernet controller.
To run the external loopback test, type
t 3/ni/ext-lb and press
Return.
External loopback test error messages
External loopback test error messages have the form
?TFL: 3/ni/ext-lb ( code : description )
?TFL: 3/ni/ext-lb indicates that the external loopback test
reported a problem.
code
represents a number that identifies which portion of
the test failed.
description represents additional information that describes
the failure.
Table D-24 lists error codes and descriptions used in external
loopback test error messages.
Table D-24. External Loopback Test Error Codes and Descriptions
Error Code and Description Meaning
(1: (LANCE-init [ xxxxxxxx ])) LANCE initialization failed. xxxxxxxx
represents a code that describes the LANCE
failure.
(3: (xmit [
xxxxxxxx, yyyyyyyy
]
zzzzz
))
LANCE initialization failed.
xxxxxxxx,
yyyyyyyy
represents a code that describes
the LANCE failure.
zzzzz
represents a code
that describes the likely cause of the failure.
(4: rcv [ xxxxxxxx, yyyyyyyy ]) System did not receive packet. xxxxxxxx,
yyyyyyyy represents a code that describes
the receive failure.
(6: pkt-data !=) Transmitted packet was not received.
(7) Fatal error occurred.
Base System Test Commands and Messages D–49