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Re: [moonv6] RE: Vista DNS behavior - Re: [nav6tf] IPv6 news - weekly summary

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From: Durand, Alain (Alain_Durand@cable.comcast.com)
Date: 09/15/06


moonv6 post from "Durand, Alain" <Alain_Durand@cable.comcast.com> Could someone clarify how this reconcile with teredo automatic IPv6 connectivity establishment?

moonv6 post from Chris Mitchell <cmitch@windows.microsoft.com> Thanks for testing and confirming this Dave. This is exactly what we specified as the expected behavior. If anyone has feedback that this isn't right please let us know.

Thanks,
Chris Mitchell
Group Program Manager
Windows Networking and Devices

-----Original Message-----
From: owner-nav6tf@ipv6forum.com [mailto:owner-nav6tf@ipv6forum.com] On Behalf Of Dave Green
Sent: Thursday, September 14, 2006 2:44 PM To: Bill Cerveny; Joya Subudhi; nav6tf@ipv6forum.com; moonv6@iol.unh.edu Subject: RE: Vista DNS behavior - Re: [nav6tf] IPv6 news - weekly summary

Bill, et all:

We've been aware of this behavior on XP, but had not checked for it in Vista. Since we run a fully dual-stacked environment this behavior wasn't causing us a problem. However, if it was still present it could cause long lags on IPv4-only environments so I tested this today on the Vista Pre-RC1 Build 5536 we are pilot testing for production. To test this, I used an IPv6-capable packet sniffer to capture and decode all DNS queries with Vista on our main dual stacked environment, and on the v4-only and IPv6-only environments we run for application testing. This is what I found:

-On a native IPv6-dual-stacked connection Vista Generated 2 DNS requests for each record and I was able to reach our IPv6-only content sites.

-In our IPv4-only test environment, I only saw requests for A records and requests to our IPv6 only content sites failed.

-In our IPv6-only environment, I only saw requests for AAAA records and our IPv6 content sites worked fine.

I believe that this behavior is exactly what we wanted Vista to do.  

David Green | VP of R&D | Command Information 13655 Dulles Technology Drive, Suite 100 | Herndon, VA 20171 O: 703.561.5937 | M: 703.899.9663 | green@commandinformation.com  

-----Original Message-----
From: owner-nav6tf@ipv6forum.com [mailto:owner-nav6tf@ipv6forum.com] On Behalf Of Bill Cerveny
Sent: Monday, September 11, 2006 6:53 PM To: Joya Subudhi; nav6tf@ipv6forum.com; moonv6@iol.unh.edu Subject: Vista DNS behavior - Re: [nav6tf] IPv6 news - weekly summary

Does anyone have any experience with Vista beta?

The two articles below about Vista and DNS melting the Internet suggest that Vista will always make two DNS requests; one for the A record and the other for the AAAA record. While I might expect this to occur if Vista thinks it is connected to an operational IPv6 network, will Vista still do this if it doesn't have a globally routable IPv6 address or any other indication that it is connected to an IPv6-enabled network?

Bill Cerveny

On Mon, 11 Sep 2006 10:38:21 -0400, "Joya Subudhi" <joya@subudhi.com> said:
> IPv6 news - weekly summary
> Main News:
> Plan for cyberspace available in near future
> http://www.ipv6tf.org/news/newsroom.php?id=2237
>
>
> Other News:
> IPv6: The future is now
> http://www.ipv6tf.org/news/newsroom.php?id=2236
>
>
> Security:
>
>
> Corporate and Products:
> Vista's role in Imminent Net Death overstated
> http://www.ipv6tf.org/news/newsroom.php?id=2240
>
> Command Information Appoints Greg Sloan to Lead Commercial Sector
> Business Development
> http://www.ipv6tf.org/news/newsroom.php?id=2239
>
> Will Vista stall Net traffic?
> http://www.ipv6tf.org/news/newsroom.php?id=2238
>
> Using the Network Diagnostic Tester
> http://www.ipv6tf.org/news/newsroom.php?id=2235
>
>

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