Port Connection Problems - Nortel BayStack 450 Using Manual

Table 4-2. Corrective Actions
Symptom
All LEDs are off.
The Activity LED for a
connected port is off or
does not blink (and you
have reason to believe
that traffic is present).
The Status LED is off.
The Status LED is
blinking.

Port Connection Problems

You can usually trace port connection problems to either a poor cable connection
or an improper connection of the port cables at either end of the link. To remedy
these types of problems, make sure that the cable connections are secure and that
the cables connect to the correct ports at both ends of the link.
Port connection problems are also traceable to the autonegotiation mode or the
port interface.
302401-D Rev 00
Probable cause
The switch is not receiving AC
power.
The fans are not operating or
the airflow is blocked, causing
the unit to overheat.
The switch is experiencing a
port connection problem.
The switch's link partner is not
autonegotiating properly.
A fatal error was detected by
the self-test.
A nonfatal error occurred
during the self-test.
Corrective action
Verify that the AC power cord is fastened securely
at both ends and that power is available at the AC
power outlet.
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.
See "Port Connection Problems" on
Cycle the power to the switch (disconnect and
then reconnect the AC power cord).
If the problem persists, replace the switch.
Cycle the power to the switch (disconnect and
then reconnect the AC power cord).
If the problem persists, contact the Nortel
Networks Technical Solutions Center.
Troubleshooting
page 4-7.
4-7