[126066] in North American Network Operators' Group
RE: Edu versus Speakeasy Speedtest
daemon@ATHENA.MIT.EDU (Blake Pfankuch)
Thu Apr 29 12:11:33 2010
From: Blake Pfankuch <bpfankuch@cpgreeley.com>
To: Bret Clark <bclark@spectraaccess.com>, "nanog@nanog.org" <nanog@nanog.org>
Date: Thu, 29 Apr 2010 10:10:44 -0600
In-Reply-To: <4BD9AE2A.6050101@spectraaccess.com>
X-MAIL-FROM: <bpfankuch@cpgreeley.com>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
Agreed. Most of the sites are not accurate for large bandwidth locations. =
Speedtest.net is flash based, however I find that slightly more accurate u=
p to about 50-100mbit range.
-----Original Message-----
From: Bret Clark [mailto:bclark@spectraaccess.com]=20
Sent: Thursday, April 29, 2010 10:05 AM
To: nanog@nanog.org
Subject: Re: Edu versus Speakeasy Speedtest
All the new OS's (IE Windows7) automatically adjust TCP window size.
Personally I've never found those website speed test to be that accurate on=
fast connections (over 15Mbps full duplex). The only way to really confir=
m bandwidth is by running IPERF.
Robert Glover wrote:
> Adjust your TCP window size.
>
> -----Original Message-----
> From: "Murphy, William" <William.Murphy@uth.tmc.edu>
> Date: Thu, 29 Apr 2010 10:53:01
> To: nanog@nanog.org<nanog@nanog.org>
> Subject: Edu versus Speakeasy Speedtest
>
> I work for an Edu with multi-gigabit Internet connectivity and I get=20
> questions from users saying "Why am I only getting 14Mb when I run=20
> this speed test?" I have got to believe that the various Internet=20
> speed tests (Speakeasy or dslreports) are rate limited to prevent=20
> someone from shutting them down. I am able to get 300-400Mb running=20
> from a PC inside my network to NDT servers located on Internet2, so=20
> that tells me my border and internal network is healthy. Can someone=20
> on this list shed some light regarding reliability and accuracy of=20
> these various speed tests especially for an Edu with lots'o bandwidth? T=
hanks.
>
> =20
>
> Bill Murphy
>
> University of Texas Health Science Center - Houston
>
> =20
>
>
>
>
> =20
