[118928] in North American Network Operators' Group
Re: Speed Testing and Throughput testing
daemon@ATHENA.MIT.EDU (Richard A Steenbergen)
Mon Nov 2 19:02:56 2009
Date: Mon, 2 Nov 2009 18:02:04 -0600
From: Richard A Steenbergen <ras@e-gerbil.net>
To: Michael Painter <tvhawaii@shaka.com>
In-Reply-To: <36078C360A8B43E5BD6D8A64AD56D81E@DELL16>
Cc: NANOG <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Mon, Nov 02, 2009 at 01:30:18PM -1000, Michael Painter wrote:
> Nathan Ward wrote:
> >On 3/11/2009, at 10:56 AM, Mark Urbach wrote:
> >
> >>Anyone have a good solution to get "accurate" speed results when
> >>testing at 10/100/1000 Ethernet speeds?
>
> An NDT server?... such as:
> http://ndt.anl.gov:7123/
I just tested that server, and couldn't get any results which were even
vaguely close to accurate. Of course it probably didn't help that the
only routes I could find to the test server were either Chicago - Palo
Alto - Chicago or Chicago - Ashburn - Chicago, but this doesn't seem
like it would ever be useful for testing gigabit anything.
For end user testing, I've actually seen reasonable results from
speedtest.net. http://www.speedtest.net/result/610596179.png for
example, better than ndt.anl.gov at any rate. :P
For quick and dirty high speed Internet testing up to a gigabit, this is
my favorite standby (it often helps to eliminate your local disk from
the equation by writing the downloaded file to /dev/null too):
> fetch -o /dev/null http://cachefly.cachefly.net/100mb.test
/dev/null 100% of 100 MB 102 MBps
But the best (and conveniently enough the most commonly used) tool for
in-depth high speed testing was already mentioned, iperf. Another useful
tool if you're trying to troubleshoot tcp issues is
http://www.tcptrace.org/.
--
Richard A Steenbergen <ras@e-gerbil.net> http://www.e-gerbil.net/ras
GPG Key ID: 0xF8B12CBC (7535 7F59 8204 ED1F CC1C 53AF 4C41 5ECA F8B1 2CBC)
