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No display on the configuration terminal
Symptom
After the router is powered on, the console terminal does not display anything.
Solution
Follow these steps to troubleshoot the configuration system failures first:
1.
Verify that the power supply system is operating correctly.
2.
Verify that the console cable is properly connected.
If the cause cannot be located in the steps above, the possible reasons are as follows:
•
The console cable is connected to an incorrect serial port (the serial port in use is not the one
set on the configuration terminal).
•
The properties of the configuration terminal are incorrect. You must configure the configuration
terminal as follows: set
Bits per second
to
9600
,
Data bits
to
8
,
Parity
to
None
,
Stop bits
to
1
,
Flow control
to
None
, and
Terminal Emulation
to
VT100
.
•
The console cable is broken.
Garbled characters on the configuration terminal
Symptom
After the router is powered on, the configuration terminal displays garbled characters.
Solution
Verify that the
Data bits
field is set to
8
for the configuration terminal. If the
Data bits
field is set to
5
or
6
, the configuration terminal displays garbled characters.
No response from the serial port
Symptom
No boot information is displayed on the configuration terminal when the router starts up or restarts
up.
Solution
Verify that the serial cable is in good condition and the serial port properties are correct.
Troubleshooting interface module, cable, and
connection failure
Symptom
After an interface module is installed and the router is powered on, the LEDs on the interface module
panel indicate that the interface module is operating improperly.
Solution
1.
Verify that the interface module makes good contact with the rear panel of the router slot.
2.
Verify that the router supports the interface module.
3.
Verify that the interface module is installed in the specified router slot.
4.
Verify that a correct cable is used.
