My company currently has MPLS and DIA coming from one provider. The firewall allowing all the sites connected to break out onto the DIA is hosted in the MPLS cloud. Now we are upgrading our DIA, but will be using a different ISP. We will keep the MPLS network intact but we are moving the DIA off the MPLS into the Head Office itself.
Picture attached to make things a bit clearer. So what I am trying to show here is that remote sites previously routed through the MPLS firewall but now all traffic should be routed to the head office routers which then break out.
What I want is for all traffic to remain routed the same for now but want to be able to test the new routing schematic. It was suggested that another VLAN be created on the MPLS routers which all points to the head office router and then that router points to the new firewall. I am not certain that default gateways can be set per-vlan? I would think a whole vrf would be necessary?
So the question really is; is there a way I can test the new routes while maintaining current connectivity?