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Garbled terminal display
If terminal display is garbled, check that the following settings are configured for the terminal, for
example, HyperTerminal:
•
Baud rate—9,600
Data bits—8
•
Parity—none
•
Stop bits—1
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Flow control—none
•
When you modify the settings for the console port of the switch, configure the same settings for the
console terminal.
Troubleshooting the switch during the operation
At the CLI, you can use related commands to display the switch information and locate the failures.
When you detect configuration errors, re-configure the switch or restore the factory settings for the switch.
Power supply system failure
When the switch operates correctly, the LEDs on the power module (AC LED and DC LED) are green. For
more information, see "Appendix C LEDs."
NOTE:
After the power supply to the power module is turned off, it is normal that the LEDs stay on for a period of
time.
When the LEDs are off or not green, the power module is not operating correctly.
To troubleshoot the power supply system:
1.
When the DC LED is orange, the power module is over-temperature and enters the self protection
state. Make sure the switch is well ventilated and is operating in a compliant environment.
2.
When the DC LED is red, the power module may encounter output short circuit, output over-current,
output over-voltage, input under-voltage, or remote disconnection, and enters the self protection
state. Remove the failures mentioned above. The DC LED is also red when the input of the power
module is disconnected and the other power modules in the chassis are operating correctly. In this
case, you can connect the input or keep the input disconnected as needed.
3.
Verify the power cable connections. If a power cable is loose, re-plug the power cable. If a power
cable is broken, replace it.
4.
Verify the power module installation. If the power module is not fully seated, re-install the power
module to make sure it has a close contact with the backplane of the switch.
5.
Verify the power supply system. Make sure the power supply system is operating correctly and
provides a normal voltage.
6.
If the switch has empty power module slots, unplug the power module, plug the power module into
an empty power module slot after all LEDs on the power module are off, and verify that the power
module can operate correctly.
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Table of Contents
Troubleshooting
