Use TCP Optimizer to increase WSCALE/RWIN on Windows hosts to achieve better
TCP perf
http://www.speedguide.net/downloads.php
Thanks
Alex
----- Original Message -----
From: "Saku Ytti" <s...@ytti.fi>
To: <juniper-nsp@puck.nether.net>
Sent: Monday, April 08, 2013 8:13 AM
Subject: Re: [j-nsp] Speed
On (2013-04-08 03:46 +0200), Johan Borch wrote:
of a single session with a RTT of only 8ms? The performance is the same
if
I use 2 switches and the clients directly connected as if i use routers
between. Any idea what it could be?
bw * delay = window
so
window / delay = bw
64k*8 / 0.008 = 64000kbps = 64Mbps
To achieve 40Mbps, you'd need
40M*1000/8 * 0.008 = 48kB window
make sure with tshark what your actual window size is, don't trust iperf.
Best thing is to configure OS TCP stack to window scaling and dont touch
iperf window settings, I don't know why, but they just seem to break
stuff.
Also never measure network with TCP, measure network with UDP, measure TCP
stack of hosts with TCP.
--
++ytti
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