Nortel Networks 2000 Manual De Usuario

Descargar
Página de 405
332 Chapter 6 Troubleshooting
208700-B
 
Normal power-up sequence
In a normal power-up sequence, the LEDs appear as follows:
1
After power is applied to the switch, the Pwr (Power) LED turns on within 5 
seconds.
2
The switch initiates a self-test, during which the port LEDs display various 
patterns to indicate the progress of the self-test.
3
Upon successful completion of the self-test (within 10 seconds after power is 
applied), the Status LED turns on.
4
The remaining port LEDs indicate their operational status, as described in 
Table 60   Corrective actions
Symptom
Probable cause
Corrective action
All LEDs are off.
The switch is not receiving AC 
power.
Verify that the AC power cord is fastened securely 
at both ends and that power is available at the AC 
power outlet.
The fans are not operating or 
the airflow is blocked, causing 
the unit to overheat.
Verify that there is sufficient space for adequate 
airflow on both sides of the switch.
Note: 
Operating temperature for the 
switch must not exceed 40°C (104°F). Do 
not place the switch in areas where it can 
be exposed to direct sunlight or near 
warm air exhausts or heaters.
The Activity LED for a 
connected port is off or 
does not blink (and you 
have reason to believe 
that traffic is present).
The switch is experiencing a 
port connection problem.
See 
” next.
The switch’s link partner is not 
autonegotiating properly.
The Status LED is off.
A fatal error was detected by 
the self-test.
Cycle the power to the switch (disconnect and 
then reconnect the AC power cord).
If the problem persists, replace the switch.