Please refer this link for configuring SD-WAN on FMGR
For SD-WAN we require following things
1.SD-WAN health check Server
2. SD-WAN template
4. firewall Policies
In FMGR, you can configure SD-WAN in two Ways, per device OR Central-Mgmt
-- Per device,
-configure template and health check server for each device individually
-common Template and health check Server which can be assigned to multiple devices.(For enabling central-mgmt SD_WAN,go to system settings>> All ADOMs>> edit the ADOM >> Check SD-WAN)
- Interfaces can be configured with default mapping(name has to match with device interface) or per device mapping can be configured.
-- Pre-requisite for SD-WAN,
the WAN interfaces should not be referred in the policies
- If you have added FGT to FMGR via wan1/wan2 interface connection, then in all the WAN policies in PP, you need to replace WAN interface with 'sd-wan' interface.
- And then after configuring SD-WAN you can perform installation.
-If you get errors while installation regarding wan interfaces have references, then try to find the reference and delete it. If reference is for firewall policy, you can go to device manager >> double click the device >> CLi Configuration >> firewall Policy >> replace the WAN interfaces with 'virtual-wan-link'. And then try installing again.