H3C Technologies H3C S9800 Series Switches - Manual (Page 58)

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Maintenance and troubleshooting
To avoid switch failures, maintain the switch as follows:
• Clean your switch periodically.
• Make sure the switch operates in a compliant environment.
• Verify the installation environments against the requirements in " Preparing for installation ."
• Periodically perform the power-on test for the spare switches.
When the switch fails, you can locate the failures by using related display commands or by LEDs.
• Use display commands to examine the configuration for configuration errors or examine statistics
for exceptions. If any configuration error is found, re-configure the switch or restore the
factory-default settings. For more information, see H3C S9800 Switch Series Fundamentals
Configuration Guide.
• Examine LEDs to locate the faulty component. For more information about the LEDs, see " Appendix
C Ports and LEDs ."
If you cannot locate failures by following the guidelines in this chapter, contact the local agents or
technical support engineers. For more information, see " Technical support ."
Configuration terminal problems
No display on the configuration terminal
The configuration terminal has no display when the switch is powered on.
To resolve the problem:
1. Verify that the power system is operating correctly.
2. Verify that the switch is operating correctly.
3. Verify that the console cable has been connected correctly.
4. Verify that the following settings are configured for the terminal:
{
Baud rate—9600.
{
Data bits—8.
{
Parity—None.
{
Stop bits—1.
{
Flow control—None.
{
Emulation—VT100.
5. Verify that the console cable is not faulty.
6. If the problem persists, contract H3C support.
Garbled display on the configuration terminal
The configuration terminal displays garbled text.