H3C Technologies H3C S12500-X Series Switches - Manual (Page 69)

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Troubleshooting
This chapter describes how to troubleshoot your S12500-X switch.
TIP:
Clean your switch periodically because the noncompliant operating environments of switches might cause
switch failures. At the same time, verify the installation environments against the requirements in
"Preparing for installation." Make sure the switch operates in a compliant environment. Additionally,
periodically perform the power-on test for the spare switches.
Troubleshooting methods
When your S12500-X switch fails, you can use the following methods to troubleshoot the switch:
• At the CLI, you can use the related commands to display the hardware information, and locate the
hardware failures.
• Every MPU provides LEDs for the fans, power modules, and cards. You can locate the failures
according to the LED status on the MPU. For more information about the LED status on the MPU, see
"Appendix C LEDs."
• The S12510-X AC/S12510-X DC switch provides LEDs for the power modules, fans, MPUs, switching
fabric modules, and LPUs on the front panel. You can locate the failures according to the LED status.
For more information about the LED status on the chassis, see "Appendix C LEDs."
• Every MPU or LPU of the switch provides the port status LEDs, with which you can detect port failures.
For more information about the LED status on the LPU, see "Appendix C 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
If the configuration environment setup is correct, the configuration terminal displays boot information
when the switch is powered on. If the setup is incorrect, the configuration terminal displays garbled text
or does not display anything.
No terminal display
To resolve the problem:
1. If the configuration terminal displays nothing when the switch is powered on, verify the following
items:
{
The power supply system is operating correctly.
{
The MPU is operating correctly.
{
The console cable has been connected to the console port of the MPU.
2. If no problem is found, examine the console cable for the following problems: