Hi Andrew,
Thanks, this is exactly the answer I was hoping for. I knew I was missing
something.
Cheers
Nik
_____
From: Andrew Gallatin [mailto:galla...@gmail.com]
Sent: Tuesday, 15 October 2013 12:40 AM
To: Nik Koracek
Cc: Mohammad Hajjat; iperf-users
Subject: Re: [Iperf-users] Help understanding results from a single TCP
session
You were getting more bandwidth than expected because Linux (and other OSes)
will automatically increase the TCP window size. Google for
tcp_moderate_rcvbuf, for example. One way to actually get the window sizes
you expect is to use the -w argument to iperf. Note that linux will double
what you specify (so if you specify 128K, it will use 256K internally).
Drew
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