IPv6: Not A Simple Renumbering

A decade ago, organizations went through a massive overhaul of their IT infrastructure in an effort to prevent the massive outages anticipated with Y2K. Now they need to decide whether a similar investment will be needed again. Publicly routable IPv4 address allocations are going to reach exhaustion in the next two years, if the projections from the Number Resource Organization (NRO) are to be believed. Soon after that, finding IPv4 addressing won't be easy.