Question to Google

Mark Andrews marka at
Mon May 15 13:00:31 UTC 2017

In message <20170515124359.a3o7evaostrvm3tk at>, Stephane Bortzmeyer writes
> > 	Unfortunately, every time we've looked at the data, the
> > 	conclusion has been that it would cause unwarranted user
> > 	impact. IIRC the most recent blocker was a major US ISP whose
> > 	clients would experience breakage if even just one NS record
> > 	was dual-stacked.
> 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.
> So, this answer is at least insufficient.

It wouldn't suprise me if the dispute between Google and Cogent was
not part of the issue.  Pure speculation on my part.  I could be
completely off base.

Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: marka at

More information about the NANOG mailing list