teredo.ipv6.microsoft.com off?

Christopher Palmer Christopher.Palmer at microsoft.com
Tue Jul 16 23:27:54 CEST 2013

I am "acking" this thread.

If there is feedback on the ongoing experiment or our consideration of sunsetting Teredo, do let me know.

So far people have been quite enthusiastic. 

Christopher.Palmer at Microsoft.com
Windows Networking Core - Program Manager
Core Client Connectivity and Protocols

-----Original Message-----
From: ipv6-ops-bounces+christopher.palmer=microsoft.com at lists.cluenet.de [mailto:ipv6-ops-bounces+christopher.palmer=microsoft.com at lists.cluenet.de] On Behalf Of Ignatios Souvatzis
Sent: Sunday, July 14, 2013 11:52 PM
To: ipv6-ops at lists.cluenet.de
Subject: Re: teredo.ipv6.microsoft.com off?

On Sat, Jul 13, 2013 at 10:39:12PM +0300, Tassos Chatzithomaoglou wrote:

> At the same time, i'm thinking out loud...
> Why would a windows application send an a request to an IPv6 DNS 
> server over native IPv6 in order to find the IPv4 address of a server 
> and get IPv6 over IPv4 connectivity?

Why not? Thinking "in order to" is wrong... it's just a database lookup.

It just happens that in this case, asking over IPv6 can't work.
But this should be no problem as the database lookup will be repeated over other transports until it succeeds.

In the general case, you don't know whether connectivity to address X of type Y is possible until you try it, and unfortunately, sometimes only after a time-out period has passed without answer. 


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