From owner-freebsd-net@freebsd.org Sun Feb 12 16:28:30 2017 Return-Path: Delivered-To: freebsd-net@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 ECE0CCDC4CA for ; Sun, 12 Feb 2017 16:28:30 +0000 (UTC) (envelope-from herbert@mailbox.org) Received: from mx2.mailbox.org (mx2.mailbox.org [80.241.60.215]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "*.mailbox.org", Issuer "SwissSign Server Silver CA 2014 - G22" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id B58D511DE for ; Sun, 12 Feb 2017 16:28:30 +0000 (UTC) (envelope-from herbert@mailbox.org) Received: from smtp1.mailbox.org (smtp1.mailbox.org [80.241.60.240]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx2.mailbox.org (Postfix) with ESMTPS id 2AA5344402 for ; Sun, 12 Feb 2017 17:28:22 +0100 (CET) X-Virus-Scanned: amavisd-new at heinlein-support.de Received: from smtp1.mailbox.org ([80.241.60.240]) by spamfilter02.heinlein-hosting.de (spamfilter02.heinlein-hosting.de [80.241.56.116]) (amavisd-new, port 10030) with ESMTP id 20MG4C4cqVsV for ; Sun, 12 Feb 2017 17:28:15 +0100 (CET) Date: Sun, 12 Feb 2017 17:28:13 +0100 Message-ID: <86fujj9xwi.wl-herbert@mailbox.org> From: "Herbert J. Skuhra" To: freebsd-net@freebsd.org Subject: Re: VNET/epair double MAC address In-Reply-To: <4DA494ED-4268-4175-A90A-485F5411F581@leerkotte.net> References: <4DA494ED-4268-4175-A90A-485F5411F581@leerkotte.net> MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=ISO-8859-7 Content-Transfer-Encoding: quoted-printable X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 12 Feb 2017 16:28:31 -0000 Marlon Leerkotte skrev: > = > Hi everyone, > I have been using jails with VNET since about 10.1 or 10 and have so > far not encountered any huge problems except for accidentally giving > two jails the same epair which broke my stack. But today I did > encounter a problem. > = > The problem i encountered was where one of my jails would lose all > connectivity when starting another jail, after some investigation it > turned out that both jails had the same MAC address. I=A2m not aware > of how these MAC addresses are generated but this seems to be a bug, > as I=A2m not manually assigning MAC address. > = > In the attachments you will find my jail.conf and the ifconfig > output of both jails. I hope someone can help me with this and/or > give me some insight as to how the addresses are generated. -- Herbert