iv
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.
5. Verify that the cable is correctly connected.
Restoring the factory settings
Scenario 1
Symptom
When you replace the device, the device password is lost. As a result, you cannot log in to the device and
do not know the device configuration.
Solution
Because the device is replaced, you do not need to save the configuration of the device. In this case, you
can press the Reset button for more than 4 seconds to reboot the router and restore the factory settings.
Then, you can use the username and password shipped with the device to log in to the device.
When the device configuration must be saved and you have a console cable, you can log in to the device
through the BootWare menu. For more information, see "Troubleshooting user password loss."
Scenario 2
Symptom
After the configuration is modified, the network connectivity is lost. When you check the configuration,
the configuration is very complicated and it is hard to locate the errors. In this case, you must configure
the device again.
Solution
If you have not saved any configuration, you can reboot the device through pressing the Reset button for
a short time or power off the router.
If you have saved some configurations, you can use the CLI to delete the configuration file.
Then, you can press the Reset button to restore the factory settings.
Scenario 3
Symptom
The router crashes.
Solution
Press the Reset button for a short time to reboot the router.
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