dual stack & IPv6 on by default

[Alain Durand <Alain.Durand@Sun.COM>]

My colleagues (Sebastien Roy & Jim Paugh) from Sun & I wrote a draft
on dual stack implementations and turning IPv6 on by default on them.

http://www.ietf.org/internet-drafts/draft-roy-v6ops-v6onbydefault-00.txt

We would like to offer it as a contribution to v6ops
and would like to receive feedback from the wg.

	- Alain.

Abstract

   The dual stack model is based on the assumption that applications can
   try communicating to destinations over IPv6 first and fall back to
   IPv4 if IPv6 doesn't work.  Before turning the dual stack on by
   default, we need to make sure that this assumption holds even in
   cases where IPv6 connectivity is not perfect.

   This document looks at scenarios in which things can go wrong if the
   IPv6 dual stack is enabled by default.