[157362] in North American Network Operators' Group
Re: Please, talk me down.
daemon@ATHENA.MIT.EDU (Mikael Abrahamsson)
Tue Oct 16 23:43:07 2012
Date: Wed, 17 Oct 2012 05:42:55 +0200 (CEST)
From: Mikael Abrahamsson <swmike@swm.pp.se>
To: Joseph Anthony Pasquale Holsten <joseph@josephholsten.com>
In-Reply-To: <2801F5F8-B8E2-4A9F-9A89-02D7783CCDA7@josephholsten.com>
Cc: "nanog@nanog.org" <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Wed, 17 Oct 2012, Joseph Anthony Pasquale Holsten wrote:
> But today I noticed that we have a lot of traffic to our DNS cache, and
> started to investigate. Turns out that every DNS request would start
> with one for the AAAA record. Ah, no luck. Maybe you forgot the search
> domain? Let's retry that DNS request with that tacked on. Failed again?
> Meanwhile, lets simultaneously try for the AA record then. Repeat.
You're describing normal behaviour. Why do you feel the behaviour you're
seeing is a problem? Because you're not running IPv6, you're seeing twice
the DNS traffic in some cases.
Doing multiple lookups for everything in search domain is done for IPv4 as
well.
--
Mikael Abrahamsson email: swmike@swm.pp.se
