North American Network Operators Group

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Re: IPv6 routing /48s

  • From: Nathan Ward
  • Date: Wed Nov 19 16:02:39 2008

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

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.

Works fine most of the time, however when that non-RFC1918 address is behind NAT, or some sort of packet filter, then it doesn't work so well, and the client does not have a way to detect that reliably.

Nathan Ward