Using SD-Wan as a backup to MPLS connection

[from_afar]

After months of fighting SD-Wan only to be told by several levels of support (officially) that SD-Wan doesn't work well with SMB (our primary use case), we are getting a MPLS line installed between the Spoke and Hub locations. I would prefer to not introduce more equipment into the mix (currently running MX-68 at spoke with MS120 switch at the spoke and at the Hub MX-95 with 2 MS-125 and 1 MS425 switches (425 connects our VM Hosts and NAS devices). 

Can anyone provide a recommended way to set things up so that we can use the MPLS as the primary connection but fail over to SD-Wan in the event that the MPLS line goes down for some reason? Is that even possible? Right now we are using the simplest setup of single spoke and hub so not using VLAN's beyond the default/what are created in that setup wizard. I'm ok if we have to go that route, but figure the simpler the better. 

Any advice would be appreciated. 

[RaphaelL]

SD-Wan doesn't work well with SMB

You were lied to.

[MartinS]

Yea who told you that @from_afar ?

[ww]

The design would look something like this.  https://documentation.meraki.com/MX/Networks_and_Routing/Integrating_an_MPLS_Connection_on_the_MX_LA...

[Inderdeep]

Mostly MPLS used for QOS purposes but SDWAN is always better solution i would say.. What underlay connections you are using Internet ? 

[cmr]

I converted a 9 site Gig dual MPLS network to dual SDWAN and it worked well for many years and still does.  There is a lot of SMB traffic, so SD-WAN is definitely good for that!

[JGill]

We ripped out our MPLS and replaced with Duel broadband.  10 X the performance for 1/10 of the price! 

During the migration we ran them side by side as load balanced interfaces,  just set the available speeds under the sd-wan traffic shaping.   Make sure your Hubs have firewall rules out from any firewalls between the Hub Concentrator and internet so you can build auto-vpn tunnels.  

But agreed,   SMB traffic does not have issues via SD-WAN, if anything it's faster because you get much better bandwidth for the money!