Clear the existing engine configuration before changing the Secure SD-WAN Engine role

Before you change the role of an Secure SD-WAN Engine from one type to another, clear the existing engine configuration.

Steps

  1. Connect to the engine’s command line using a monitor and keyboard or a serial cable, and log on as root.
    If you use a serial cable, use a terminal console program to connect to the Secure SD-WAN appliance with these settings:
    • Bits per second — 115,200
    • Data bits — 8
    • Parity — None
    • Stop bits — 1.
    Note: The serial console port speed is 115,200 bps in most Secure SD-WAN appliances. The speed is 9600 bps in older Secure SD-WAN appliance models. See the hardware guide for your Secure SD-WAN appliance model for more information.
  2. Enter the command sg-clear-all.
    The engine restarts and you are prompted to select the system restore options.
    CAUTION:
    Using the system restore options clears all configuration information from the engine. It is not possible to recover the engine’s previous configuration.
  3. Type 2 and press Enter.
    You are prompted to select the number of overwrites for the data partition.
  4. Type 0 and press Enter.
    You are prompted to select the number of overwrites for the swap partition.
  5. Type 0 and press Enter.
    You are prompted to select whether to remove the spool partition.
  6. Type 2 and press Enter.
    You are prompted to select the number of overwrites for the spool partition.
  7. Type 0 and press Enter.
    You are prompted to confirm that you want to clear the configuration.
  8. Type YES and press Enter.
    The system starts clearing the engine’s configuration.
    CAUTION:
    Do not turn off or restart the engine while the configuration is being cleared. Doing so can cause a serious error that prevents the engine from starting.
  9. Press Enter to restart the engine when prompted.
    The engine restarts and the Secure SD-WAN Configuration Wizard starts on the command line.