Replacing FortiGate serial numbers

You can use this procedure to replace one FortiGate with another FortiGate by updating the serial number in SD-WAN Orchestrator MEA.

It is recommended to use the same WAN IP for the new and old FortiGates, regardless of whether a static IP or DHCP is used.

To replace FortiGate serial numbers:

1. In SD-WAN Orchestrator MEA, go to Configuration > Device, and ensure that the Config Status for the device is Synched.
2. Turn off the FortiGate device that you want to replace.
3. Edit the serial number in SD-WAN Orchestrator MEA
   1. Go to Configuration > Device, and double-click the device to open it for editing.
   2. Beside the Serial Number box, click the Pencil icon.

      The Serial Number box becomes editable.

   3. In the Serial Number box, type the new serial number, and click Confirm.
   4. Click OK.

      The serial number is updated.

4. In FortiManager, download a configuration revision for the FortiGate device you are replacing.
   1. Go to Device Manager > Device & Groups, and select the device group.

      The devices in the group display in the left tree menu and in the content pane.

   2. Double-click a device.

      The System > Dashboard > Summary is displayed in the content pane.

   3. In the Configuration and Installation widget, click the Revision History button.

      The Configuration Revision History dialog box is displayed.

   4. Select the revision, and select Download Revision from the More menu.
   5. Select the Regular Download, and click OK.

      The configuration is downloaded to your computer.

5. Open the downloaded configuration file in a text editor, and remove the FortiManager IP address from the central-management configuration section.

   The change ensures that the new FortiGate device isn't registered as a new device.

6. Turn on the new FortiGate.
7. Go to FortiOS, and restore the configuration.
8. Go to FortiManager, and replace the serial number by using the following CLI.

   #diag dvm device list

   #exec device replace sn <device name> <serial number>

   <serial number> is case-sensitive. Letters used in Fortinet product serial numbers are capitalized.