On Jun 23, 2010, at 15:06, Martin Rex wrote: > optimizing for their own interest alone I don't know about you, but when I set up a server, I have a strong interest that my clients get their data fast. So whatever it takes to do that, is in my interest. BTW, initial analyses of iOS 4 (iPhone OS) show that they are always v6 enabled: http://isc.sans.edu/diary.html?storyid=9058&rss It would be interesting to know how their v6/v4 preference goes. They also appear to be using MAC-based addresses (as opposed to RFC4941/RFC3041 privacy-enhanced). If that is indeed true, that will be a *great* incentive for server operators to switch on NAT-free IPv6, once they start to understand the implications (no need for cookies any more :-). Gruesse, Carsten _______________________________________________ Ietf mailing list Ietf@xxxxxxxx https://www.ietf.org/mailman/listinfo/ietf