> Dual stack isn't always the best approach. For networks that pass a > large amount of traffic to a relatively small number of destinations, > NAT64/DNS64 on a native v6 platform might be a better migration > approach. If 90% of your traffic is v6, it is probably less trouble to > use NAT64/DNS64 to reach that 10% than it is to dual-stack.
the scenario i think of here is the enterprise which wishes not to use private space so deploys v6-only internally, and nat64 at the border to a dual-stack provider. randy
