Troubleshooting the Configuration System
If the system runs normally after the router is powered on, the booting information is
displayed on the configuration terminal. If the configuration system is faulty, the terminal
screen may display nothing or illegible characters.
No Display on the Terminal Screen
Symptom
After the router is powered on, the configuration terminal displays nothing.
Solution
Check that:
The power supply is normal.
The console cable is properly connected.
If the cause cannot be located in the steps above, the possible reasons are as follows:
The serial port to which the console cable is connected is not the one configured in
the emulation program.
Terminal settings are incorrect. The required settings are as follows: 9600 bits per
second, 8 data bits, no parity, 1 stop bit, no flow control, and VT100 for terminal
emulation type.
The configuration cable is not in good condition.
If the cause cannot be located in the steps above and the problem persists, contact your local
sales agent.
Illegible Characters on the Terminal Screen
Symptom
After the router is powered on, the configuration terminal displays illegible characters.
Solution
If the “Data bits” field is set to 5 or 6 in the emulation grogram, illegible characters
appear on the screen. Set this field to the default value 8.
Check that the current baud setting is 9600 bps. An incorrect baud setting can
cause illegible characters.
Make sure that the work mode of the AUX port is flow when using the AUX port as
the backup console port. For more information, refer to "Using the AUX Port as
Backup Console Port” on page 7-7.
Serial Port Response Failure
Symptom
The serial port gives no response.
Solution
Check that the cable is in good condition and the serial port settings are correct.
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