On Wed, Mar 31, 2010 at 1:55 PM, Dan Wing <[email protected]> wrote: > But Remi's point is that those same systems (running Windows XP > and IE6) using 6rd will be denied the ability to access content > via IPv6. Which removes an incentive for ISPs to add 6rd (and > offload the NAT44 they may soon have to install).
I'm not sure this is true: o the end-station sends a dns query to the ISP recursive resolver o the recursive resolver uses whichever protocol is 'best' for the lookup (assuming something like BIND's NS RTT caching happens in the majority of cases) o if the query goes over ipv6, is for a AAAA, a AAAA response could be returned o if the query goes over ipv4, is for a AAAA, no response is returned and presumably a follow-up A query happens. Igor/Yahoo are proposing that recursive resolvers which have v6 transport use it and be rewarded for doing so... if they have a longer/worse path over ipv6 there's a good chance the user experience will also suffer, so the users should use v4. -chris -chris _______________________________________________ DNSOP mailing list [email protected] https://www.ietf.org/mailman/listinfo/dnsop
