when i use IE7 on windows vista using only ipv6 connectivity. If i enter a url in IE7, The vista laptop sends out the AAAA DNS lookup. If the domain lookup resolves to a CNAME, there is no second lookup to resolve the CNAME. For example putting www.microsoft.com in IE7 - dns resoves to the cname toggle.www.ms.akadns.net. There is no recursive lookup (as normally is done on IPV4 with a A record lookup). If this is expected behavior, it would make web browsing on ipv6 useless.
"RJPierce63" wrote in message news:CB15AC0B-7228-4F3A-84F5-9B2DCF8A8C84@microsoft.com... > when i use IE7 on windows vista using only ipv6 connectivity. If i enter > a > url in IE7, The vista laptop sends out the AAAA DNS lookup. If the > domain > lookup resolves to a CNAME, there is no second lookup to resolve the > CNAME. > For example putting www.microsoft.com in IE7 - dns resoves to the cname > toggle.www.ms.akadns.net. There is no recursive lookup (as normally is > done > on IPV4 with a A record lookup). > > If this is expected behavior, it would make web browsing on ipv6 useless. It's expected, but not for the reason you expect. www.microsoft.com is a CNAME for a number of hosts, through Akamai. Akamai has no IPv6 presence. Therefore, there is no AAAA record for toggle.www.ms.akadns.net. So, you can't get to www.microsoft.com from an IPv6-only machine. Try testing out some sites that are available on IPv6 - www.kame.net, and ipv6.research.microsoft.com. Alun. ~~~~
