From owner-freebsd-net@FreeBSD.ORG Sat Nov 6 22:09:43 2010 Return-Path: Delivered-To: net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id B9EC9106564A for ; Sat, 6 Nov 2010 22:09:43 +0000 (UTC) (envelope-from pyunyh@gmail.com) Received: from mail-gw0-f54.google.com (mail-gw0-f54.google.com [74.125.83.54]) by mx1.freebsd.org (Postfix) with ESMTP id 6F6668FC16 for ; Sat, 6 Nov 2010 22:09:43 +0000 (UTC) Received: by gwj16 with SMTP id 16so2899885gwj.13 for ; Sat, 06 Nov 2010 15:09:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:received:from:date:to:cc :subject:message-id:reply-to:references:mime-version:content-type :content-disposition:in-reply-to:user-agent; bh=2ASao07MEb8EjlUzszto3e/whZ+38pZ5Vk9oDgJI55U=; b=mZndzWjbmaWtiq9y6uCZglhUVsnX5lSQaU+hJCcgDFuNsRtmvnLNKAqrOJIq/RUoGg n12Avp+7FTidp7rj/G0XH3air9zY6wooiNEHRFbLo6OXRA2Q77kN54TyfnYZLTsH08RP g4nBqjjEByg0yb3KPcc4sHpZmOL4vN3RE/Ako= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=from:date:to:cc:subject:message-id:reply-to:references:mime-version :content-type:content-disposition:in-reply-to:user-agent; b=wuMFrMz/B7VdX0bZni/b8tEaV+6bZMcute6X5sm3kDd8XMOHmGjLuFaMOCDWvTd7Cz dQMYn1yify0C22uQdzA4IEhliH4haQ6hrbYcQul7wDcNzU5pYiCNZLHrVSXzuDdSwexV Y7f4+reabeun7ODDWbCuHT3TP1zUDcXrljjJo= Received: by 10.100.208.12 with SMTP id f12mr1111879ang.38.1289081382471; Sat, 06 Nov 2010 15:09:42 -0700 (PDT) Received: from pyunyh@gmail.com ([174.35.1.224]) by mx.google.com with ESMTPS id g18sm3535359anh.38.2010.11.06.15.09.39 (version=TLSv1/SSLv3 cipher=RC4-MD5); Sat, 06 Nov 2010 15:09:40 -0700 (PDT) Received: by pyunyh@gmail.com (sSMTP sendmail emulation); Sat, 6 Nov 2010 15:09:36 -0700 From: Pyun YongHyeon Date: Sat, 6 Nov 2010 15:09:36 -0700 To: "Mikhail T." Message-ID: <20101106220936.GE22715@michelle.cdnetworks.com> References: <4CC1FD8D.7000108@aldan.algebra.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4CC1FD8D.7000108@aldan.algebra.com> User-Agent: Mutt/1.4.2.3i Cc: net@freebsd.org Subject: Re: Strange problem with sk0 X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: pyunyh@gmail.com List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 06 Nov 2010 22:09:43 -0000 On Fri, Oct 22, 2010 at 05:09:33PM -0400, Mikhail T. wrote: > Hello! > > I have a rather bizarre problem with my on-board sk interface... It only > works, when tcpdump is running... > > Seriously. It negotiates with the switch (1000baseT/full-duplex) just > fine, but, unless tcpdump has it open (and in "promiscuous" mode), no > traffic seems to go through. It would not respond to pings -- not even > from the switch itself, nothing. > > But, as soon as I start tcpdump -- even if tcpdump never has anything to > output: > > tcpdump -i sk0 -n src host 10.non.existent.IP > > Traffic starts flowing just fine... Do I simply have flaky hardware? The > motherboard is old, and, for some reason, I need to "remind" sk0, what > its ethernet address upon reboote (it starts off with 00:00:00:00:00:00). > > Any other explanations for what is happening? There are plenty of other > systems (computers, VoIP phone, two TVs) on this switch and all are > fine... I did try different ports on it -- same results. I also tried > forcing things down to 100/half-duplex -- no change... > > Thanks! Yours, > FYI: Fix committed to HEAD(r214898, r214899). Will MFC after 1 week.