[159639] in North American Network Operators' Group

home help back first fref pref prev next nref lref last post

Re: Intermittent incorrect DNS resolution?

daemon@ATHENA.MIT.EDU (Joe Abley)
Wed Jan 16 20:57:30 2013

From: Joe Abley <jabley@hopcount.ca>
In-Reply-To: <50F72AC8.5010804@uberflip.com>
Date: Wed, 16 Jan 2013 17:57:13 -0800
To: Erik Levinson <erik.levinson@uberflip.com>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org


On 2013-01-16, at 14:33, Erik Levinson <erik.levinson@uberflip.com> =
wrote:

> True...I did try 4.2.2.2 / 8.8.8.8 and some local ones here. All =
looked fine.

I sent queries from 270+ different locations for the domains you =
mentioned off-list and I didn't see any inconsistencies. The persistent =
host-caching/browser-caching theories seem like your best bet (or my =
270+ locations weren't sufficiently diverse to catch a stale zone being =
served by an anycast authority server).


Joe



home help back first fref pref prev next nref lref last post