O’Reilly OnLamp.com: Introduction to IPv6

If you’ve been curious about IPv6, this guide provides a look at
the advantages and differences from IPv4: “Assuming a basic
understanding of how today’s IPv4 works, this article is intended
as an introduction to the IPv6 protocol. The changes in address
formats and name resolution are covered. After that, it is shown
how to use IPv6 — even if your ISP doesn’t offer it — by using a
simple-yet-efficient transition mechanism called 6to4. The goal is
to to get online with IPv6, giving example configurations for BSD
Unix and Linux.”

Complete Story