[109425] in North American Network Operators' Group
Re: IPv6 routing /48s
daemon@ATHENA.MIT.EDU (Mohacsi Janos)
Thu Nov 20 03:23:15 2008
Date: Thu, 20 Nov 2008 09:22:30 +0100 (CET)
From: Mohacsi Janos <mohacsi@niif.hu>
To: Nathan Ward <nanog@daork.net>
In-Reply-To: <FB540970-BE21-48E2-AACC-ACA5302FF2D2@daork.net>
Cc: nanog list <nanog@nanog.org>
Errors-To: nanog-bounces@nanog.org
On Thu, 20 Nov 2008, Nathan Ward wrote:
> On 20/11/2008, at 4:06 AM, Florian Weimer wrote:
>
>> * Michael Sinatra:
>>
>>> And it just reinforces the fear that people have against putting AAAA
>>> records in DNS for their publicly-accessible resources, especially
>>> www.
>>
>> Won't current Windows clients work just fine in this case?
>>
>> I have no idea what a fix should look like for some of the non-Windows
>> systems I care about, unfortunately.
>
>
> No, unfortunately broken 6to4 auto-configuration (ie, in Vista, XPSP2, when
> on a non-RFC1918 IP address) breaks, and you get 90s timeouts before falling
> back to IPv4/A.
This must be a broken RFC 3484 implementation:
- 6to4 should be less prerefed than IPv4 if the service has both AAAA and
A record.
Regards,
Janos Mohacsi
