Hi
I recommend the Cisco navigator tool to know what IOS supports NAT64.
The Network Address Translation - Protocol Translation (NAT-PT) is an IPv6 to IPv4 translation mechanism, which allows IPv6-only devices to communicate with IPv4-only devices and vice versa. NAT-PT is designed to be deployed to allow direct communication between IPv6-only networks and IPv4-only networks transparently that use a single V4 address.
http://www.cisco.com/c/en/us/support/docs/ip/network-address-translation-nat/113275-nat-ptv6.html
Stateful NAT64 is a Network Address Translation mechanism for translating IPv6 addresses to IPv4 addresses, and IPv4 addresses to IPv6 addresses. Like NAT44, it is called stateful because it creates or modifies bindings or session state while performing translation. It supports both IPv6-initiated and IPv4-initiated communications using static or manual mappings. In this document, stateful NAT64 uses static IPv6 to IPv4 mapping for address translations.
https://supportforums.cisco.com/document/112121/ipv6-stateful-nat64-configuration-example
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