[dns-operations] c.root-servers.net over IPv6

Shumon Huque shuque at gmail.com
Mon Feb 3 20:46:36 UTC 2020

Didn't we discuss this recently?

I assume this is the Cogent<->Hurricane Electric IPv6 peering issue. See
the long thread that starts here (short summary: dnsviz is singly homed to
HE so can't reach Cogent IPv6 servers):



On Mon, Feb 3, 2020 at 3:14 PM SM <su at elandnews.com> wrote:

> Hello,
> c.root-servers.net (2001:500:2::c) is not responding to queries over IPv6
> [1].
> Regards,
> -sm
> 1. The error from DNSViz is "arpa zone: The server(s) were not
> responsive to queries over UDP. (2001:500:2::c)"
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