SDWAN topology

[Learning101]

Hi, I'm having some trouble achiving the topology (attachment) if it's even possible.

Router R3 is connect with two routers R1 and R2. R3 is spoke R1 and R2 are HUBs.

I would like to achive that

 - If everything works fine

    R3 gets default-route from R1 MPLS and INET

- if for example MPLS goes down on R1

   R3 should get default-route from R2 MPLS and R1 INET

- and so on

If I set with topology policy preference 200 for routes form R1 and 100 for routes from R2 and MPLS on R1 goes down, route from R2 MPLS is never installed on R3 because it has lower preference.

Is it even possible to achive that

 

?

Thank you in advance

[Flavio Miranda]

On this case, everything is working correctly but not the way you need.

Take a look in  a SDWAN feature call Tracker. Tracker is similar to IPSLA from the legacy network. You are going to need some action "IF" and "Else" here to overcome it. 

 I think Tracker might help you.  Look this video for reference:

https://www.youtube.com/watch?v=Cgpcw-pfew8 

[Learning101]

Thank your for your answer, I will have a look at it.

As I know this is tracker for DIA fallback.

[Flavio Miranda]

Actually the tracker  is a feature you can benefit with and, on this case, is being used with DIA. But, what I was suggesting is for take de idea and trry to apply on your scenario. 

 The way I see it, is the only way to address your challenge.