From owner-freebsd-current@freebsd.org Tue Aug 2 23:52:11 2016 Return-Path: Delivered-To: freebsd-current@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 9050EBAD241 for ; Tue, 2 Aug 2016 23:52:11 +0000 (UTC) (envelope-from kob6558@gmail.com) Received: from mail-io0-x22d.google.com (mail-io0-x22d.google.com [IPv6:2607:f8b0:4001:c06::22d]) (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 5A1261154; Tue, 2 Aug 2016 23:52:11 +0000 (UTC) (envelope-from kob6558@gmail.com) Received: by mail-io0-x22d.google.com with SMTP id 38so227920857iol.0; Tue, 02 Aug 2016 16:52:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:from:date:message-id :subject:to:cc; bh=qlPOW5U2vyBeyZu/9quYEgZq2j0fELy5RawSz9dF/Xo=; b=y5B/SivCweRw6Sa5Hi9t2c+lYHu5c/8V1FCqrOj6kdCh1cKtt5/me4wkhYLxGvE39h emBlO4fymAa8jqysb7jsT+PeCXhvs3IDUGNYvFDe6CRgEjZ3+CQwZEhJvlC4RcHR3lxR qXtXCJfnDprViTfprTGbfsBULdD2S7WKVDhM33R7+KV7XNrC23PCp6WKf1nNtEeTozbB tg7+nUJ06F1ewHYRjpf6Ev84hDMgz8305nlcvD5LxZv5Sd8LxTwIHiOX9w37tNQtdleM SbSJQsmB6dksM2Q42AUkjgfZVVQGNQeIXjbCGfFNZpssabdC2MK5FRz+qv9h4oP0y98U A/9A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:sender:in-reply-to:references:from :date:message-id:subject:to:cc; bh=qlPOW5U2vyBeyZu/9quYEgZq2j0fELy5RawSz9dF/Xo=; b=ET4QeEW+g/T6TLHzixOwendMkO8uWbTToMFwLZ5Yi59MxcAMvvDAhhv0eWEPW4ais8 5ui15rNXX6JEJkcvg7KdLtVzJ/Oyu1kqkCncYi5XjmJDbkfwSh4piA7fzmevQ5InQNLT qNxwrerjVVWfWYHteVHU/+Q1YMz8MsZDP7G7t1zsJdY4PvnZPlB5fOXBq4o+qhDQU5H5 zIcuE3KMbhSLOmp/Cgw2nmLBO2em8wqdk+Fs6bH58yylLL+G5ZOCYKQBUnOwA20muQR3 QlbelsuU1yhZMZ/5Rm/mu+prpUL+jPUx1fr9Ro4/iNhDkzEj0MISFRRzs1yB+ddZSoIC kuAg== X-Gm-Message-State: AEkoouutI2W6EfZEsZ/wPf436kApESbjGCDailRODqcujGmbvcorB0TxNJ+n5eq+0Ok8ydcZOFZpDNSDsuxv5A== X-Received: by 10.107.129.152 with SMTP id l24mr64314584ioi.179.1470181930563; Tue, 02 Aug 2016 16:52:10 -0700 (PDT) MIME-Version: 1.0 Sender: kob6558@gmail.com Received: by 10.79.119.144 with HTTP; Tue, 2 Aug 2016 16:52:10 -0700 (PDT) In-Reply-To: <0b90d4f0-fc02-7a07-6ce1-135a61cbc352@freebsd.org> References: <0b90d4f0-fc02-7a07-6ce1-135a61cbc352@freebsd.org> From: Kevin Oberman Date: Tue, 2 Aug 2016 16:52:10 -0700 X-Google-Sender-Auth: NPq77uJURJsIDMyCU2yoWtJ7ljA Message-ID: Subject: Re: Xen networking problems in -current with xn driver? To: Julian Elischer Cc: freebsd-current Content-Type: text/plain; charset=UTF-8 X-Content-Filtered-By: Mailman/MimeDel 2.1.22 X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 02 Aug 2016 23:52:11 -0000 On Tue, Aug 2, 2016 at 11:12 AM, Julian Elischer wrote: > I upgraded my VPS machine to today's current, and on reboot I couldn't get > into it by network. > > A quick switch to the VNC console showed that it was up but that it > couldn't get out. > > > The xn interfaces said they were UP but attempts to get out were met with > "network is down". > > if I did 'tcpdump -n -i xn0' (and xn1) hten all was fine again. > > tcpdump saw packets, and in fact ipfw saw some packets coming in even > before that but it was not possible to send. > > > Has anyone seen similar? > > some relevant parts of the dmesg output.: > > [...] A bit of a guess, but the obvious thing that I see is that when you start tcpdump you are placing the interface in promiscuous mode. Looks like the "device" fails to properly see packet addressed to it. -- Kevin Oberman, Part time kid herder and retired Network Engineer E-mail: rkoberman@gmail.com PGP Fingerprint: D03FB98AFA78E3B78C1694B318AB39EF1B055683