From owner-freebsd-net@FreeBSD.ORG Thu May 21 16:10:32 2015 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 28203FC2 for ; Thu, 21 May 2015 16:10:32 +0000 (UTC) Received: from mail-ig0-x22a.google.com (mail-ig0-x22a.google.com [IPv6:2607:f8b0:4001:c05::22a]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id E267211D4 for ; Thu, 21 May 2015 16:10:31 +0000 (UTC) Received: by igcau1 with SMTP id au1so12406268igc.1 for ; Thu, 21 May 2015 09:10:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=content-type:mime-version:subject:from:in-reply-to:date:cc :message-id:references:to; bh=l3pqTG4Z8jlsh7EkzqW/JpozAEib6ZUVWbW91sI46ZE=; b=jiYAcFoXzwmbVtPral1vNHk3FkErRwliKLtF4D36IK6+hI7aUFT3K2TojzlzI0IjmM GNMKNDW2ehSaTDQ6kz1d1EexpjwqKG4VmE9nSvZM633mHfDmr7u6XdNbbIeFh13aA+1p +VkeFLpkgSOTVCeE0POJ+jDoXQZh/dkgZzmR8wP7fCvpeFIe1stYahGBxMPxBblwh8aH VJssNFWiKatEofqjN5mQ5XRfnykJiVp7Cc41RtZaK81pwbKYFrFL4OOiZ8TU1DrnJs57 4geN+UIGBEeYaXKJkgmGT36qxjqeSMCDyG8l7yjedo5S6tMTWB90jlV5HM5ddVzrNC/g pCrA== X-Received: by 10.42.128.84 with SMTP id l20mr4231976ics.21.1432224631446; Thu, 21 May 2015 09:10:31 -0700 (PDT) Received: from [172.22.132.117] ([192.119.231.58]) by mx.google.com with ESMTPSA id q10sm1624875ige.16.2015.05.21.09.10.30 (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Thu, 21 May 2015 09:10:30 -0700 (PDT) Mime-Version: 1.0 (Mac OS X Mail 8.2 \(2098\)) Subject: Re: FreeBSD 9.3 - Intel X520-SR2 stops passing packets From: Guy Helmer In-Reply-To: Date: Thu, 21 May 2015 11:10:38 -0500 Cc: FreeBSD Net Message-Id: References: To: Christopher Forgeron X-Mailer: Apple Mail (2.2098) Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Content-Filtered-By: Mailman/MimeDel 2.1.20 X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 21 May 2015 16:10:32 -0000 > On May 21, 2015, at 8:52 AM, Christopher Forgeron = 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 > 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=