I took my new favorite simulation and created VRF with NAT. The two areas in the boxes Development and Research have 192.168.48.0 subnets that are identical. I am using NAT so they don’t cross over to the other area. On Development I am using Dynamic NAT with a NAT range of 192.168.96.3 to 31. On Research I did Overload only using 192.168.49.3 for NAT.
iosv2 has Overload NAT configured for Research. I removed ip vrf forwarding from the interfaces and switched back to Router OS # on all the routers for NAT to work. The two Sh IP NAT Translation files show that overload NAT is being used. Same IP address for pings from 3 routers to TFTP.
iosv13 uses dynamic NAT instead of Overload NAT. 192.168.96.3 to 192.168.96.31 has been set aside for it. I removed ip vrf forwarding from the interfaces and switched back to Router OS # on all the routers for NAT to work. Each of the three routers PING test has a different NAT IP address from the range.