From owner-freebsd-net@FreeBSD.ORG Fri Jul 19 09:29:50 2013 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) by hub.freebsd.org (Postfix) with ESMTP id AE61144A; Fri, 19 Jul 2013 09:29:50 +0000 (UTC) (envelope-from Olivier.Nicole@cs.ait.ac.th) Received: from mail.cs.ait.ac.th (mail.cs.ait.ac.th [192.41.170.16]) by mx1.freebsd.org (Postfix) with ESMTP id 62944C2A; Fri, 19 Jul 2013 09:29:50 +0000 (UTC) Received: from mail.cs.ait.ac.th (localhost [127.0.0.1]) by mail.cs.ait.ac.th (Postfix) with ESMTP id 0E76EFEBD7; Fri, 19 Jul 2013 16:29:43 +0700 (ICT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cs.ait.ac.th; h= content-type:content-type:mime-version:message-id:date:date:from :from:subject:subject:received:received:received; s=selector1; t=1374226182; x=1376040583; bh=/2ENGVAFFUvJRqBL1Zh8UPag33FYhV8q tbcmPHelGno=; b=PcOUdm52M156ZGku8YNUrsAP0RlQ4YfCt3ZoaR4q1RjKIxo2 +7id4zbWspBK8yJmYjybA3Cdi7lNJojYf4H71dN/K68b4v/ZK3K3aFPIXKVuhiAk n03h3u+WbocJdqvkKaoZRtu09km+X+FxfG531+/8bbD3smDXCtiK2NroVb0= X-Virus-Scanned: amavisd-new at cs.ait.ac.th Received: from mail.cs.ait.ac.th ([127.0.0.1]) by mail.cs.ait.ac.th (mail.cs.ait.ac.th [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id JtvinY-FYQcz; Fri, 19 Jul 2013 16:29:42 +0700 (ICT) Received: from banyan.cs.ait.ac.th (banyan.cs.ait.ac.th [192.41.170.5]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.cs.ait.ac.th (Postfix) with ESMTPS id C106BFEBCF; Fri, 19 Jul 2013 16:29:42 +0700 (ICT) Received: (from on@localhost) by banyan.cs.ait.ac.th (8.14.5/8.14.5/Submit) id r6J9TgiS009335; Fri, 19 Jul 2013 16:29:42 +0700 (ICT) (envelope-from on@banyan.cs.ait.ac.th) To: questions@freebsd.org, freebsd-net@freebsd.org Subject: Same MAC address in 2 different VLANs From: Olivier Nicole Date: Fri, 19 Jul 2013 16:29:42 +0700 Message-ID: MIME-Version: 1.0 Content-Type: text/plain X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 19 Jul 2013 09:29:50 -0000 Hello, Could any one comment about the use of the same MAC address in 2 separate VLANs? All my machines are connected to 2 VLANs (one public and one private) with no routing in between the VLANs. I used to run a FLEX license manager to a physical machine. When I virtualized that service, I had to use the MAC address of that physical machine for the virtual machine (FLEX is linked to the MAc address and I coul dnot issue new license as licensed the pproduct is not supported anymore). The virtual NIC that has the old MAC address is connected to the public VLAN. Now I want to reuse the physical machine as a VMware server. Dell nor VMware offer a solution to change the MAC address (like ifconfig em0 link xx:xx:xx:xx:xx:xx would do). So I plan to connect the NIC with the incriminated MAC to the private VLAN. Most (if not all) my servers are FreeBSD. Most will access the virtual machine running FLEX and may access the VMware server also. The servers are not VLAN aware. Will this be an issue? Best regars, Olivier --