Technical Tip: Cannot create multiple default route

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.

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.