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Subject: Re: FreeBSD 10 network flapping, ix driver unreliable?
From: George Neville-Neil <gnn@neville-neil.com>
In-Reply-To: <ldohqb$s2c$1@ger.gmane.org>
Date: Sat, 15 Feb 2014 18:43:39 -0500
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To: Kevin Bowling <kevin.bowling@kev009.com>
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On Feb 15, 2014, at 15:14 , Kevin Bowling <kevin.bowling@kev009.com> =
wrote:

> Hi,
>=20
> I have FreeBSD 10.0-RELEASE installed on two Dell C6100 nodes.  Each =
node has an Intel X520-DA2 dual port 10gig card.  One of the ports on =
each go to a switch using direct attach coaxial cables.  The other port =
is directly connected between the two nodes (think crossover in twisted =
pair terminology) again using direct attach coaxial cables.
>=20
> On both machines, and on both ports (including the "crossover"), the =
links flap several times per day.
>=20
> I've pasted the output of lspci -vv and dmesg here:
> https://gist.github.com/kev009/9024442
>=20
> There's nothing outstanding about the setup otherwise.  I suspected =
some interaction with the switch initially but the "crossover" has =
eliminated that suspicion.
>=20
> It seems the ix driver is not very reliable under common conditions, =
i.e. https://forums.freebsd.org/viewtopic.php?f=3D7&t=3D44570 and a =
search of this list.  Any recommendations or tests?
>=20

Can you post (to your gist link) the output of sysctl dev.ix ?

Best,
George