H3C CR19000-20, Installation Manual, Page: 105 / 139

9-1
9
Troubleshooting
This chapter provides information for troubleshooting issues with your router.
TIP:
•
Noncompliant operating environment might cause router failure. You need to clean your router
periodically and make sure the installation environment meets the requirements (see "Preparing
for installation").
•
Periodically perform power-on test on standby devices.
Troubleshooting methods
When your router fails, you can use the following methods to troubleshoot the router:
•
At the CLI, you can use related commands to display hardware information, and locate
hardware failures.
•
The MPU provides LEDs for the fan trays, power supplies, and modules. You can locate the
failures according to the LED status on the MPU. For more information about the MPU LEDs,
see
H3C CR19000-20 Core Router Hardware Information and Specifications .
•
The MPUs and interface modules provide port status LEDs, with which you can detect port
failures. For more information about port status LEDs, see
H3C CR19000-20 Core Router
Hardware Information and Specifications .
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 display issues
No display on the configuration terminal
Symptom
The configuration terminal does not display any output when the router is powered on.
Solution
To resolve the issue:
1. Verify that the power supply system is operating correctly.
2. Verify that the MPU is operating correctly.
3. Verify that the console cable connects the console port on the MPU correctly.
4. Verify that the console cable connects to the correct serial port on the terminal.
5. Verify that the console cable is in good quality and is operating correctly.
6. Verify that the following settings are configured for the terminal:

Baud rate —9600.

Data bits —8.

Parity —None.

Stop bits —1.

Flow control —None.