No one seems willing to predict a date by which the last IPv4 packet will traverse the Internet backbone, but we are seeing clear progress toward IPv6 critical mass in the form of dual-stack implementations in enterprise, mobile, and home-based devices and operating systems.
Once it becomes clear we've reached an inflection point, when service and content providers can count on dual-stack users, and users can count on the availability of IPv6-enabled content, the pace of adoption should quicken. Just as no one needs to be the first to support IPv6, no one wants to be last either.
The reality is, Roberts says, "It takes a while to transition. After all this is done it would be a great graduate thesis for someone to see why it has taken so long."
Lee Schlesinger is Network World's former test center director. You can follow him on Twitter @leeschlesinger.
Read more about LAN and WAN in Network World's LAN & WAN section.