[116672] in North American Network Operators' Group
Re: Residential BW Planning
daemon@ATHENA.MIT.EDU (Mikael Abrahamsson)
Wed Aug 12 23:47:59 2009
Date: Thu, 13 Aug 2009 05:47:43 +0200 (CEST)
From: Mikael Abrahamsson <swmike@swm.pp.se>
To: nanog@nanog.org
In-Reply-To: <4A820889.6080906@sleepycatz.com>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Tue, 11 Aug 2009, sjk wrote:
> I am trying to perform some capacity planning for some of our
> residential pops, but the old calcs I used to use seem useless -- as
> they were adapted from the dialup days and relied upon a percentage of
> users online (~50%) and a percentage of concurrent transmission (~19%).
> My present scenario involves a micro-pop terminating 250 residences
> where users are expecting 4 mb/s. So I am looking for some baseline to
> begin at, so I am wondering what others are doing.
>
> Any thoughts are appreciated.
I've seen everything from ~20 kilobit/s/user at peak, to over 400
(measured at 5 minute average with mrtg with ~500 users).
It differs a lot if you get the "mom and pop"-userbase or if you have
bunch of students who are downloading/streaming stuff all the time.
Generally, comparing ADSL 8/1 to ETTH 10/10 or 100/100, download doesn't
differ much, but symmetric speed users put out factor 4 more traffic (8/1
users upload half as much as what they download, ETTH users upload double
what they download).
--
Mikael Abrahamsson email: swmike@swm.pp.se
