Troubleshooting The System; Troubleshooting On Startup; Troubleshooting The Switch During The Operation; Troubleshooting The Power Supply System - H3C S7500E Series Installation Manual

Troubleshooting the system

Troubleshooting on startup

After you power on the switch, if the switch operates properly, the startup information appears on the
console terminal. If the console terminal displays nothing or garbled characters, use the following
methods to troubleshoot the switch.
No display on the terminal
If the console terminal displays nothing after you power on the switch, check the following items:
The power supply system works properly.
•
The SRPU works properly.
•
The console cable has been connected to the console port of the SRPU.
•
If no problem is found, the following failure reasons may apply:
The console cable is connected to an incorrect serial interface (the serial interface in use is not the
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one set on the terminal). To solve this problem, select a correct serial interface.
The console cable fails. To solve this problem, replace the console cable.
•
Garbled characters on the terminal
If the console terminal displays garbled characters, the reason may be that the properties of the terminal
are inconsistent with the console port of the switch.
NOTE:
The default settings of the console port of an S7500E switch are as follows: Bits per second is 9600, Data
bits is 8, Parity is None, Stop bits is 1, Flow control is None, and Terminal Emulation is VT100.
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. For
more information about the CLI, see the chapter "Hardware management and maintenance."
When you detect configuration errors, re-configure the switch or restore the factory settings for the switch.

Troubleshooting the power supply system

When the switch operates properly, the LEDs related to the power supply system are as follows:
• The LED on the power module is green. On a power module with multiple LEDs, each LED indicates
the status of a function. For more information, see the Chapter "Appendix C LEDs."
For the PWR LEDs on the SRPU, the OK LED is on, and the Fail LED is off.
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