[165685] in North American Network Operators' Group
Re: common method to count traffic volume on IX
daemon@ATHENA.MIT.EDU (Niels Bakker)
Wed Sep 18 18:55:53 2013
Date: Thu, 19 Sep 2013 00:55:27 +0200
From: Niels Bakker <niels=nanog@bakker.net>
To: nanog@nanog.org
Mail-Followup-To: nanog@nanog.org
In-Reply-To: <007332D0-B603-4319-8B22-A22D979F7797@ufp.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
* bicknell@ufp.org (Leo Bicknell) [Wed 18 Sep 2013, 19:23 CEST]:
>On Sep 17, 2013, at 3:15 PM, Niels Bakker <niels=nanog@bakker.net> wrote:
>>I don't know of any IXP that does this. Industry standard is as
>>you and others wrote before: the 5-minute counter difference on
>>all customer-facing ports, publishing both input and output bps
>>and pps. I guess MRTG is to 'blame' for these values more than
>>anything.
>
>Serious question, at an IXP shouldn't IN = OUT nearly perfectly?
Ding ding ding! And that's why honest IXPs graph both, to show that
they have no packet loss on their inter-switch links.
(Or, much more likely, measurement errors due to wrong config for the
grapher)
-- Niels.
