I have a VPN lab setup between 2 routers into a vlan to act like a VPN:
Router 1 FE > Switch with Internet VLAN < Router 2 FE
The routers only have 1 FE port each, so these act as their external interface, each router has a loopback interface to act as their local LAN.
Now I want to assume that both LAN's (loopbacks) use the same IP range, I would like one of the routers to NAT so each LAN can communicate so one of the LAN's uses a completely different IP range. How can I do this? I assume I will need another device to provide the NATing?