The Integrate Interface option on the Network > Interfaces page helps migrate a physical port into another interface or interface type such as aggregate, software switch, redundant, zone, or SD-WAN zone. The FortiGate will migrate object references either by replacing the existing instance with the new interface, or deleting the existing instance based on the user's choice. Users can also change the VLAN ID of existing VLAN sub-interface or FortiSwitch VLANs.
The interface migration wizard does not support turning an aggregate, software switch, redundant, zone, or SD-WAN zone interface back into a physical interface.
In this example, a DHCP server interface is integrated into a newly created redundant interface, which transfers the DHCP server to a redundant interface.
Go to Network > Interfaces and select an interface in the list.
Click Integrate Interface. The wizard opens.
Alternatively, select an interface in the list. Then right-click and select Integrate Interface.
Select Migrate to Interface and click Next.