I am applying IPv6 on a router 7200, version 12.4.
I have a router between an IPv6 network and an IPv4 network to connect an IPv6-only node with an IPv4-only node. IPv6 networks nodes communicate with IPv4 network nodes using an IPV6 mapping of the IPv4 address configures on the NAT-PT router.
To enable this, i need an IOS with the command "ipv6 nat prefix". What version of IOS do i need?