From mboxrd@z Thu Jan  1 00:00:00 1970
From: Eric Dumazet <eric.dumazet@gmail.com>
Subject: Re: TCP fast retransmit
Date: Wed, 14 Dec 2011 23:31:49 +0100
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Cc: "Esztermann, Ansgar" <Ansgar.Esztermann@mpi-bpc.mpg.de>,
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To: Yuchung Cheng <ycheng@google.com>
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Le mercredi 14 d=C3=A9cembre 2011 =C3=A0 11:00 -0800, Yuchung Cheng a =C3=
=A9crit :
> >
> I use tcptrace to check the time sequence and I am puzzled:
> I see a lot of OOO packets too but how can this happen at a sender-si=
de trace?
> unless the trace is taken close to but not exactly at the sender.
> I expect on seeing in-sequence packets but a lots of SACKs plus some
> spurious retransmists.

I understood the trace was a receiver-side one (a linux machine if I am
not mistaken, while the sender is AIX powered)

(Looking at timings of ACKS, coming a few us after corresponding data
packet arrival)