[141018] in North American Network Operators' Group
RE: Contention/Oversubscription maths
daemon@ATHENA.MIT.EDU (Frank Bulk)
Sat May 28 01:19:32 2011
From: "Frank Bulk" <frnkblk@iname.com>
To: "'Adam Armstrong'" <lists@memetic.org>,
"Jeroen van Ingen" <jeroen@zijndomein.nl>
In-Reply-To: <4DDF9EF3.8080102@memetic.org>
Date: Sat, 28 May 2011 00:18:30 -0500
Cc: nanog@nanog.org
Reply-To: frnkblk@iname.com
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
Wow, that works out be a per-connect max of 785 kbps.
Frank
-----Original Message-----
From: Adam Armstrong [mailto:lists@memetic.org]
Sent: Friday, May 27, 2011 7:54 AM
To: Jeroen van Ingen
Cc: nanog@nanog.org
Subject: Re: Contention/Oversubscription maths
On 27/05/2011 13:44, Jeroen van Ingen wrote:
<snip>
> Perhaps students are not average users, but our Resnet currently has:
> * Approx 2000 connections, most at 100 Mbps.
> * These are divided into 4 areas, each area is connected with 1 Gbps to
> central location (so on average you could say we have 500 users sharing
> a 1 Gbps link)
> * Central location has 10 Gbps uplink; stats for this link over the last
> 7 days at 10-min average polling interval are:
> in: min 422 Mbps, avg 883 Mbps, max 1570 Mbps, 95th pct 1250 Mbps.
> out: min 48 Mbps, avg 272 Mbps, max 571 Mbps, 95th pct 459 Mbps.
>
> Perhaps these numbers can be used as an indication for your
> sizing/design.
Most useful response so far, thanks very much :)
adam.
