Troubleshooting guide

2. Troubleshooting Switch Failures
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2.2 Troubleshooting faults for AX3800S, AX3600S, and AX2400S series
switches
2.2.1 Procedure for handling switch faults
Use the procedure described below if a failure occurs on a Switch.
Table 2-3: Troubleshooting switch failures
No. Problem Action
1 • Smoke emanates from the switch.
• An abnormal odor emanates from the
switch.
• An abnormal sound emanates from the
switch.
Immediately take the following actions:
1. Turn off the switch.
2. Remove the power cable from the switch.
After completing the above procedure, replace the switch.
2 The login prompt does not appear. 1. If a memory card has been inserted, remove the card, and turn
the switch off and then on again to restart the switch.
2. If a memory card has not been inserted, turn the switch off and
then on again to restart the switch.
3. If restarting the switch does not solve the problem, replace the
switch.
3 The PWR LED of the switch is off. Follow the procedure shown below:
1. Perform the steps shown in Table 2-4: Isolating the cause of
power failures.
2. For a redundant power model, replace the power supply unit on
which a malfunction has occurred. When a malfunction occurs
on a power supply unit, either of the following applies:
(a) The POWER LED is off.
(b) The ALM1 LED is lit in red.
(c) The ALM2 LED is lit in red.
3. If neither step 1 nor 2 above applies, restart the switch and
check whether there are any abnormalities.
(1) Turn the power switch of the switch (or of the power supply
unit for a redundant power model) off and then on again to
restart the switch.
(2) If the switch successfully restarts, execute the
show
logging command to check the failure information.
>show logging | grep ERR
(3) If the failure information contains a high-temperature
warning message, the operating environment might be the
cause of the problem. Ask the system administrator to improve
the environment.
(4) If you cannot restart the Switch in step (1) or if failure
information cannot be obtained in step (3) or does not contain
a high-temperature warning message, a fault has occurred on
the switch. In this case, replace the switch.
4 The red ST1 LED of the switch is on. A fault has occurred on the switch, or the power to the switch is
turned on after a long period (more than one month) of being in a
non-powered state.
1. If power is to be supplied after a long period without power,
turn the power switch off and then on again to restart the
Switch.
2. If step 1 above does not apply, a fault has occurred on the
Switch. Replace the Switch.