[175254] in North American Network Operators' Group
Re: Keeping Track of Data Usage in GB Per Port
daemon@ATHENA.MIT.EDU (Joe Hamelin)
Wed Oct 15 20:43:55 2014
X-Original-To: nanog@nanog.org
In-Reply-To: <D0643604.E4F81%jason_livingood@cable.comcast.com>
From: Joe Hamelin <joe@nethead.com>
Date: Wed, 15 Oct 2014 17:43:27 -0700
To: "Livingood, Jason" <Jason_Livingood@cable.comcast.com>
Cc: NANOG <nanog@nanog.org>
Errors-To: nanog-bounces@nanog.org
>
>
> On 10/15/14, 1:38 PM, "Colton Conor" <colton.conor@gmail.com> wrote:
>
> >So based on the response I have received so far it seems cable was a
> >complicated example with service flows involved.
>
Don't forget that between your port on your DSL/Cable modem and the actual
port they may be monitoring there could be transitions through various
protocols that can chew up bandwidth with framing bits and whatnot.
See: http://www.yourdictionary.com/cell-tax as an example.
This can, in worse but common cases, be as much as one fifth of the
bandwidth.
--
Joe Hamelin, W7COM, Tulalip, WA, 360-474-7474
