Departmental Switch Model DS-16B Hardware Reference Manual
Front Panel Diagnostics
Port Loopback Test The portLoopbackTest verifies the intended functional operation of
the switch by sending frames from each port’s transmitter back to the
same port’s receiver via an internal hardware loopback.
Pressing <Enter> while
Port Loopback Test is selected displays a
reminder to take the switch offline, if it is not offline. If the message is
displayed, take the switch offline.
The
Port Loopback Test is an internal test which continues to run
until you press any button. While the test is running, all GBIC
module front panel LEDs rapidly flicker green indicating that the test
is finding no errors and is processing.
To stop the test, press any button,
Aborted is displayed:
Related error messages: DIAG-INIT, DIAG-PORTDIED,
DIAG-XMIT, DIAG-TIMEOUT, DIAG-ERRSTAT, DIAG-STATS,
DIAG-DATA, DIAG-PORTABSENT
Cross Port Test The crossPortTest verifies the intended functional operation of the
switch by sending frames from each port’s transmitter via the GBIC
and external cable and back to another port’s receiver. It exercises the
entire path of the switch.
Figure 4-2 is a recommended connection when executing the
crossPortTest. The cables need not be connected as such. A port can
be connected to any port in the same switch provided the connection
is of the same technology; meaning SW ports must connect to SW
ports and LW ports to LW ports.
Figure 4-2 Switch Setup to Run Cross Port Test
Port Loopback Test: Aborted
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