The saved configuration file will be erased. Are you sure? [Y/N]:y
Configuration file in flash: is being cleared. Please wait ... MainBoard: Configuration file is cleared.
Start to check configuration with next startup configuration file, please wait.........DONE! Current configuration may be lost after the reboot, save current configuration? [Y/N]:n
This command will reboot the device. Continue? [Y/N]:y
reboot第一次一定记着选择N，第二次再选择Y
