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From: John Baldwin <jhb@freebsd.org>
To: "C. L. Martinez" <carlopmart@gmail.com>
Subject: Re: Network connections are lost from time to time
Date: Fri, 19 Apr 2013 15:11:14 -0400
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 (bigwig.baldwin.cx); Fri, 19 Apr 2013 15:26:04 -0400 (EDT)
Cc: "freebsd-net@freebsd.org" <freebsd-net@freebsd.org>,
 Jack Vogel <jfvogel@gmail.com>
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On Friday, April 19, 2013 12:32:18 pm C. L. Martinez wrote:
> On Friday, April 19, 2013, John Baldwin <jhb@freebsd.org> wrote:
> > On Friday, April 19, 2013 3:11:41 am C. L. Martinez wrote:
> >> Hi all,
> >>
> >>  I have a strange problem with my FreeBSD 9.1 (fully patched): I loose
> ssh
> >> sessions from time to time frequently.
> >>
> >>  This fbsd box is installed in an ESXi 5.1 server and I have another
> three
> >> fbsd 9.1 in the same ESXi host that do not have this problem, but maybe
> the
> >> problem is with my sysctl.conf and loader.conf settings:
> >
> > Which NIC driver are you using?
> >
> > --
> > John Baldwin
> 
> 
> e1000.

igb?  There are some fixes to handle out of order packets on transmit that 
could break new connections in some cases.  That is probably worth testing.  I 
think you can just grab the sys/dev/e1000 from 9-stable and drop it into a
9.1 tree to test.

-- 
John Baldwin