Date: Sat, 15 Feb 2014 18:43:39 -0500 From: George Neville-Neil <gnn@neville-neil.com> To: Kevin Bowling <kevin.bowling@kev009.com> Cc: FreeBSD Net <freebsd-net@freebsd.org> Subject: Re: FreeBSD 10 network flapping, ix driver unreliable? Message-ID: <61748F81-A763-4504-BC81-132D394F0170@neville-neil.com> In-Reply-To: <ldohqb$s2c$1@ger.gmane.org> References: <ldohqb$s2c$1@ger.gmane.org>
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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
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