We finally got a fiber connection and MPLS setup at our other office and I am working on configuration of the hardware to send up there, but had a few concerns. At my office we have 2 domain controllers, one giving out DHCP, I was going to have the Sonicwall at the other location give out its own DHCP, so in the event that the MPLS is down, they are still able to be online, etc. If the primary subnet is 10.10.0.0 and the other is 10.10.1.0, is DHCP going to end up getting passed over the MPLS and cause conflictions? I was thinking of setting up a vlan, but I do not believe I need to, I have the static routes setup and I can ping from here to the end of the MPLS which is 10.10.1.250 currently, and the Sonicwall is going to be connected to that at 10.10.1.1, but I am not sure that a vlan is really necessary in this case. The remote office will just be accessing files, and I will be sending replicated backup data to a server we will be putting up there for disaster recovery.
Is there anything I need to setup or change / configure on the Sonicwalls to make sure that DHCP at that location stays at that location and vice versa, or anything else I should consider in this situation? Below is an incomplete network map I began making, but do not have the NY side right yet, waiting on information and images from them to make it accurate, there is a bit more equipment than that, but the logistics of it are pretty much the same.