
4
4
The Road to Next
Generation
No matter how successful IPv4 has been, in hindsight there’s no denying
that it could have been a better protocol. As its popularity increased,
replacing or updating it has become increasingly more problematic. Lack
of network address space is very likely the engine driving adoption of
IPv6, but there are other reasons being proposed for moving to support
IPv6. This chapter opens with a discussion of some of the improvements
that have been proposed for the next generation of IP, followed by a brief
history of the development effort for IP Next Generation (IPng).
4.1 Early Assumptions About the Internet Environment
Once it ...