[97930] in North American Network Operators' Group
Re: DNS issues?
daemon@ATHENA.MIT.EDU (Valdis.Kletnieks@vt.edu)
Fri Jul 20 16:23:59 2007
To: =?utf-8?B?Q2hyaXN0aWFuIEt1aHR6?= <kuhtzch@corp.earthlink.net>
Cc: Erik Amundson <Erik.Amundson@oati.net>, owner-nanog@merit.edu,
nanog@nanog.org
In-Reply-To: Your message of "Fri, 20 Jul 2007 19:52:34 -0000."
<1575007157-1184961316-cardhu_decombobulator_blackberry.rim.net-10466545-@bxe031.bisx.prod.on.blackberry>
From: Valdis.Kletnieks@vt.edu
Date: Fri, 20 Jul 2007 16:19:22 -0400
Errors-To: owner-nanog@merit.edu
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On Fri, 20 Jul 2007 19:52:34 -0000, =?utf-8?B?Q2hyaXN0aWFuIEt1aHR6?= said:
> To Vladis' point, how do you know that you couldn't reach the roots vs the
> roots not being able to reach you?
In addition to which, his nameservers probably wouldn't *need* to reach the
actual roots unless they'd managed to timeout their cache for things like
.com and .org and .net. 'dig . soa' says:
. 86400 IN SOA A.ROOT-SERVERS.NET. NSTLD.VERISIGN-GRS.COM. 2007072000 1800 900 604800 86400
86400. Yummy. "Tune in tomorrow for updates". Most likely, it's a TLD server
or three that he's unable to reach, not the actual roots themselves. But given
that routing issues *are* included in the original message, and I've seen naught
saying that there were any DNS servers in the "reachable but misbehaving" state,
I have to conclude that root cause is a routing blurp.
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