Date: Thu, 21 May 2015 11:10:38 -0500 From: Guy Helmer <guy.helmer@gmail.com> To: Christopher Forgeron <csforgeron@gmail.com> Cc: FreeBSD Net <freebsd-net@freebsd.org> Subject: Re: FreeBSD 9.3 - Intel X520-SR2 stops passing packets Message-ID: <BD7871A4-69C2-49EB-89D4-9EB741E2EB2B@gmail.com> In-Reply-To: <CAB2_NwBmpHZZ03wht55=kVHdGk4mVKpFCcmcT=sJ12y7OJSXtA@mail.gmail.com> References: <C8B78CF4-184C-4BFE-B848-37A91A3B696B@gmail.com> <CAB2_NwBmpHZZ03wht55=kVHdGk4mVKpFCcmcT=sJ12y7OJSXtA@mail.gmail.com>
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> On May 21, 2015, at 8:52 AM, Christopher Forgeron = <csforgeron@gmail.com> wrote: >=20 > A few things: >=20 > 1) How long before you have this behaviour? >=20 > 2) What's the output of 'netstat -m' when you have the problem? >=20 > 3) What is your MTU set to, and do you have TSO on or off? >=20 > On Thu, May 21, 2015 at 10:33 AM, Guy Helmer <guy.helmer@gmail.com = <mailto:guy.helmer@gmail.com>> wrote: > I=E2=80=99ve noticed that there have been reports of problems with = Intel X520-SR2 network interfaces stopping working. I think I=E2=80=99m = seeing a similar issue where the 10Gb interfaces stop receiving traffic = (they=E2=80=99re being used in promiscuous mode to sniff traffic from a = tap). ifconfig shows the interfaces are still active and the links are = OK. ifconfig down/up restores activity. I=E2=80=99ve changed = hw.intr_storm_threshold=3D8000 but I couldn=E2=80=99t tell if the = interrupt storm threshold had been triggered at the time the interfaces = stopped passing traffic. It seems to run from hours to days without problems. I don=E2=80=99t have the output of =E2=80=9Cnetstat -m=E2=80=9D = available, but it did not indicate any mbuf or cluster allocation = failures. No jumbo clusters (4k, 9k, or 16k) were allocated. MTU is 1500. TSO is =E2=80=9Con=E2=80=9D but would seem to be irrelevant = =E2=80=94 no packets are transmitted out of these interfaces (verified = using =E2=80=9Cnetstat -i=E2=80=9D). Thanks, Guy=
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