From: Eric Dumazet <eric.dumazet@gmail.com>
To: Charles Bearden <Charles.F.Bearden@uth.tmc.edu>
Cc: netdev@vger.kernel.org
Subject: Re: TCP keepalives ignored by kernel when the contain timestamps
Date: Fri, 10 Jun 2011 18:17:01 +0200 [thread overview]
Message-ID: <1307722621.4044.17.camel@edumazet-laptop> (raw)
In-Reply-To: <4DF24154.3060505@uth.tmc.edu>
Le vendredi 10 juin 2011 à 11:07 -0500, Charles Bearden a écrit :
> You are correct: the checksums in the keepalives are broken, though they are
> correct in the other segments from the Win2008 server. I have updated the pastes
> linked to above with 'tcpdump -v' output. I apologize for missing that problem
> the first time around.
Hmm, maybe its OK : If checksums are offloaded to NIC, tcpdump 'lies'
telling checksum is not OK, since tcpdump get a copy of the packet
before being handled by the NIC.
You should take a tcpdump on the receiving machine (the machine that
apparently doesnt react to the keepalive probes)
next prev parent reply other threads:[~2011-06-10 16:17 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-09 15:26 TCP keepalives ignored by kernel when the contain timestamps Charles Bearden
2011-06-10 13:56 ` Eric Dumazet
2011-06-10 15:10 ` Charles Bearden
2011-06-10 16:07 ` Charles Bearden
2011-06-10 16:17 ` Eric Dumazet [this message]
2011-06-10 16:39 ` Charles Bearden
2011-06-10 16:54 ` Eric Dumazet
2011-06-10 18:00 ` Charles Bearden
2011-06-10 18:04 ` Eric Dumazet
2011-06-10 18:13 ` Charles Bearden
2011-06-10 18:41 ` Eric Dumazet
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