On 27/Aug/15 07:16, Mark Andrews wrote: > > Or why you are looking at NAT64 instead of DS-Lite, MAP-E, or MAP-T > all of which are better solutions than NAT64. NAT64 + DNS64 which > breaks DNSSEC. Because with NAT64/DNS64/464XLAT, there isn't any "undo work" after the dust settles. There is value in that. Mark.