Voice Over IPv6: Architectures for Next Generation VoIP Networks by Daniel Minol

And this book is your guide to that future. It will also be fully "backwards compatible" with existing IPv4 systems. Minoli uses a compare/contrast approach, exploring where IPv6 is similar to IPv4 and where it differs, to let you quickly grasp the essence of IPv6 and the similarities (and differences) between current IPv4-based systems and IPv6-based systems.

eBay