In your previous mail you wrote:
Or use 6to4.
=> no, this doesn't solve anything because someone has to provide the 6to4 relay. IMHO 6to4 should never be recommended to an organization by the definition of what is an organization. What we want is one IPv6 Internet, not two!
Did you miss the context: [Michel:]
Invariably, each class I teach IPv6 subnetting, students ask me "ok, now what if want to try this?" and my answer is "go to freenet6 and get a /48".
If *students* want to try this (having no practical experience about IPv6), *by far* the easiest way is 6to4. Nothing changes that. => if they are students as common customers with an IPv4 only ISP then 6to4 is a solution, in all other cases 6to4 should not be recommended. 6to4 relays are irrelevant from the addressing, and ease-of-use point of view. => 6to4 relays are the drawback of 6to4, in fact everybody should worry at the exception of IPv4 only ISPs (i.e. exactly the case where 6to4 should be recommended). I wouldn't recommend 6to4 be used by organizations who want to really use IPv6 though. => for an organization configured (so managed) tunnels are the proper solution until an ISP is proposing a native IPv6 connectivity. Regards Francis.Dupont@enst-bretagne.fr