Troubleshooting guide

2. Troubleshooting Switch Failures
10
2.1 Procedure for handling switch faults
Use the procedure described below if a failure occurs on a Switch.
Table 2-1 Troubleshooting switch failures
No. Failure description 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.
3. 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.
See 2.1(1) Action to take when the Switch stops and the
PWR LED turns off to isolate the problem.
4 The red ST1 LED of the switch is on. The Switch may be experiencing a failure.
See
4 Obtaining Failure Information in this manual to
use the show tech-support operation command to
collect switch information.
1. Turn the Switch off and then on again to restart the
Switch.
2. If you can restart the Switch, execute the show
critical-logging operation command to
check the failure information.
>show critical-logging
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 (see the Message Log Reference).
5 The red ST1 LED of the switch blinks.
See (2) Action to take when the red ST1 LED blinks and
the LINK LED turns off to isolate the problem.
6 The orange ST1 LED of the Switch is on. This indicates the initial state when the power is turned
on. Wait a while.
7 The LINK LED (1000BASE-T or
1000BASE-X port) and the 1-48 LED
(10BASE-T or 100BASE-TX port) of each
port on the Switch are off.
See (2) Action to take when the red ST1 LED blinks and
the LINK LED turns off to isolate the problem.
(1) Action to take when the Switch stops and the PWR LED turns off
Take action according to the following table.