Bay Networks BayStack350T, Руководство пользователя, Страница: 117 / 140

Troubleshooting
893-00992-A
4-3
Diagnosing and Correcting the Problem
Before beginning the problem-solving steps recommended in this section, cycle
the power to the BayStack 350T switch; then verify that the switch follows the
normal power-up sequence.
Normal Power-up Sequence
When power is applied to the BayStack 350T switch, the LEDs display in the
following sequence:
1.
The Power LED lights as soon as power is applied to the switch.
2.
The switch initiates its self-test routine. During the self-test, the port LEDs
flash various patterns to indicate the progress of subroutines.
3.
After the successful completion of the self-test (within 10 seconds after power
is applied), the Diagnostics LED lights and remains lit.
4.
The remaining LEDs (the Port LEDs) now indicate their operational status as
described in
Table 4-2 .
Table 4-2. Corrective action table
Symptom Probable Cause Corrective Action
All LEDs are off. The switch is not receiving AC
power.
Verify that the AC power cord is securely fastened
at both ends and that power is available at the AC
outlet.
Fans are not operating, or
blocked air flow is causing the
unit to overheat. Verify that sufficient space exists for adequate
airflow at both sides of the switch.
Note:
Operating temperature for the switch must
not exceed 40
°
C (104
°
F). Verify that the switch is
not placed in direct sunlight or near warm air
exhausts or heaters.
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 “Port Connection Problems ” on page 4-4 .
The switch Link partner is not
autonegotiating properly.
BOOK.MKR Page 3 Tuesday, March 4, 1997 7:24 PM