On 1/18/13, David Swafford <david@davidswafford.com> wrote:
There is no "suckerage" to V6. Really, it's not that hard. While CGN is the reality, we need to keep focused on the ultimate goal -- a
Correct. CGN may be part of a transition towards IPv6. Not all providers are necessarily going to see it that way. It's a non-resolutely answered question, whether IPv4+CGN will win, and it will become the new common delivery of IP, or if IPv6 will win. What will be the ultimate cost, for a provider choosing to implement only IPv4 CGN, and completely eschew/ignore IPv6, if IPv6, gets massive buy-in and becomes a predominant IP networking technology, in demand, adopted by all their competitors.... Potential loss of much business for the service provider, due to competitive disadvantage. Versus cost of careful design and building in IPv6 together with CGN rollouts, so there is one major redesign, to prepare for transition, and not two separate rollouts one for CGN and one later to completely rethink for IPv6... In either scenario.... 1 ISP network implementation project for 1 wrong technology for dealing with IP exhaustion (IPv6 or CGN), and not recognizing the problem early is a disaster -- business goes to the competition. 2 ISP network implementation projects; first 1 technology, then the other, after discovering, the wrong technology was chosen, is an improvement (but still expensive) -- network redesign is time consuming, network devices and software are expensive, and business lost to the competition, at least until redesign is completed. 1 implementation of 1 right technology (IPv6 or CGN) and never the other is ideal -- cost implementing CGN (or IPv6) is avoided, if the technology never became necessary. (It's an unlikely scenario after IP exhaustion, however, that either will be unnecessary.) 1 up front preparation/implementation of 2 technologies, in time for IP exhaustion, has high upfront cost, but alleviates the high risk of the first 2 scenarios.
single long term solution. Imagine a day where there is no dual stack, no IPv4, and no more band-aids. It will be amazing.
It's probably about 20 years away.
david. -- -JH