Question to Google

Todd Underwood toddunder at
Mon May 15 13:20:17 UTC 2017

On Mon, May 15, 2017 at 8:43 AM, Stephane Bortzmeyer <bortzmeyer at>

> There are many zones (including your that have several name
> servers dual-stacked, and they didn't notice a problem. Furthermore,
> since the DNS is a tree, resolution of requires a proper
> resolution of the root and .com, both having IPv6 name servers.

"didn't notice a problem" is woefully insufficient here.

how carefully was this measured?  how was it measured?  across what
diversity of traffic.  what was the threshold for "a problem" here.

different use cases have different tolerances for the kinds of bad user
experience that google is concerned about here, both in terms of percentage
and in amount of impact.

please note that google has been super aggressively implementing and
promoting IPv6 for years, so implications that this is somehow related to
Google dragging their feet are silly.


> So, this answer is at least insufficient.

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