From owner-freebsd-net@FreeBSD.ORG  Mon Feb 24 18:20:39 2014
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Date: Mon, 24 Feb 2014 22:20:41 +0400
From: Pakhom Golynga <pakhom706@gmail.com>
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To: freebsd-net@freebsd.org
Subject: freebsd10 session/packets close/lost on igb
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Hello,
After updated two hosts to freebsd 10 I have problem with network 
(driver igb). When uptime of hosts > ~1-1.5 days host's unexpected 
drop/lost some tcp connections/packets. I try to disable -tso, -rxcsum 
and -txcsum but problem still the same.
I collect tcpdump on client and server side but not yet understood what 
was happening today.
What are recommendation for debug this issue?

Thanks