On 28 maj 2010, at 21.39, Jari Arkko wrote: > ... the simplest (and recommended) way to do this is to use dual stack (full stop). Unfortunately on applications layer I do not see enough operational experience/best practice/actual implementations that handle this in a very good way. The number of people I talk with that are nervous the cost for customer support will be higher(!) for dual stack situations than IPv6 only. I.e. that there are some arguments in favor of "one day simply give the client an IPv6 address only instead of an IPv4 address only". That I get the question, that people think in these terms, I think is "interesting". Patrik
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