Post #1884994

NAT64 only works because IPv6 addresses are longer than IPv4 addresses. And in order to achieve the flexibility which some deployments rely on you do need IPv6 addresses to be more than three times the size of IPv4 addresses. You couldn’t use the same approach to migrate from IPv6 to a new protocol with shorter addresses. Moreover experience has shown that 128 bits was a little bit on the short side (but that’s not enough of a problem to justify a new protocol.) Trying to migrate away from IPv6 to something with shorter addresses would just lead to a bigger mess. The only people who would have any chance of designing something better than IPv6 are those who already understand why IPv6 is better than IPv4.