Technical Tip: Cannot create multiple default route

[Babitha_M]

Description	This article describes the case when the user is not able to create multiple default routes when there are two ISP links, of which one is in SD-WAN and another is not in SD-WAN.
Scope	All FortiGate.
Solution	It is necessary to either add the non-SD-WAN interface to the SD-WAN or remove the configured interface from SD-WAN. For example: There are two WAN interfaces, one is wan1 and another is wan2. The wan1 is a member of SD-WAN, and wan2 is not a member of SD-WAN. There is a default route with the virtual WAN link with wan1. When trying to create another default route with wan2, which is not part of SD-WAN, the duplicate error will appear. Here is the error when trying to create a default route: There are a couple of methods to follow: Divide these interfaces into 2 different SD-WAN zones. And use these zones while addressing them in routes or firewall policies. In a static route, do not use the SD-WAN interface, but a specific interface. Then it will be possible to create the default route via any interface chosen, even the ones that are not part of SD-WAN configuration.