we were given this network design in order to integrate with another company's network. Network A is our network running EIGRP, Network B is our partner's network running EIGRP as well.
R1(router) will policy route traffic that has been changed to 172.16.0.0 to R2, and will policy route those conflicting IP address to R3 before going to R2.
How should I configure my DNS in this case? How NAT actually works in this case?