I have a new project and would like some inputs. I have basic network understanding but I think that i'm in over my head with the new project. We have 10 locations, one main loation and 9 sites connected back to main with VPN. All site are using TZ100 and main site is using a NSA3500 with latest sonicwall firmare. We are bringing in new MPLS circuits to all the locations. This is what I need help with. All the sites are coded with a 192.168.X.1/24 subnet. Main office is 192.168.1.1/24. The NSA3500 will stay the gateway and router for a FIOS 50/20 internet connection. MPLS circuits are private. I will need to transition the sites from VPN to MPLS one by one. If needed I can change the site IP scheme at any sites.
Question: How should I set the MPLS router IP and how should I connect it to the NSA3500? I have an extra interface (X5) not in use on the NSA that I was thinking about dedicating to the MPLS route. Now what IP could I assign to the main office router X5 interface? Once I transition one site from VPN to MPLS, how is the routing going to work. For example, how can I tell the NSA that site 1 is not going to be 192.168.X.0 through VPN but will be 192.168.Y.0 and will be going through interface X5 instead...
Any advices would be great!