I've got three sites, let's call them Production Plant, Remote 1 and Remote 2. They're not big networks. The Production Plant has two internal networks that has control systems designed for all being on the internal network. One of the networks has got different VLANs used for logical separation, for ie. automation, CCTV and other stuff. It's okay that they are not physically separated outbound, but how do I keep my VLAN tagging and put it all back together again on the other side?
Can I send the different VLANs as individual VPN connections between the sites? MPLS?
I'm not bound to any kind of equipment here, and price is generally not a big problem.