From owner-freebsd-questions@FreeBSD.ORG Sun Jan 23 03:05:17 2011 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 38BE3106564A for ; Sun, 23 Jan 2011 03:05:17 +0000 (UTC) (envelope-from prvs=0997c54d95=johnl@iecc.com) Received: from gal.iecc.com (gal.iecc.com [64.57.183.53]) by mx1.freebsd.org (Postfix) with ESMTP id A73248FC14 for ; Sun, 23 Jan 2011 03:05:16 +0000 (UTC) Received: (qmail 4385 invoked from network); 23 Jan 2011 02:38:34 -0000 Received: from mail1.iecc.com (64.57.183.56) by mail1.iecc.com with QMQP; 23 Jan 2011 02:38:34 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=simple; d=iecc.com; h=date:message-id:from:to:subject:mime-version:content-type:content-transfer-encoding:vbr-info; s=4a9b.4d3b94aa.k1101; i=johnl@user.iecc.com; bh=82aY1CxoxI1UukI6+LNJEFw6zoq3Oaj54UXCP2oDTZw=; b=K2PO/ZsgPQHj6+AFItpQ4i7x46hZHgfAV/xUy/wnkimXTes68iZIH0auBfJmpUEUsune8VpemIQ2pDAs1ySMGkCwl5SwsmktvaDGGgaeMKG1I/JeZxMNOK9ragKEEcTde241PI6cO/jP0QOKn6Q8psqIKTmKHi2HTz/F4OlFT8w= VBR-Info: md=iecc.com; mc=all; mv=dwl.spamhaus.org Date: 23 Jan 2011 02:38:34 -0000 Message-ID: <20110123023834.19098.qmail@joyce.lan> From: John Levine To: freebsd-questions@freebsd.org Organization: X-Headerized: yes Mime-Version: 1.0 Content-type: text/plain; charset=utf-8 Content-transfer-encoding: 7bit Subject: Changing the MAC address on a LAN adapter X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 23 Jan 2011 03:05:17 -0000 My Lenovo laptop running 8.1 has two ordinary Intel network adapters, a wired PRO/1000 with the em driver and a WiFi PRO/Wireless 5300 with the iwn driver. They work fine, but for either one if I use ifconfig to change the MAC address, the adapter won't actually work until I change the address back to the native one. Typical symptoms are endless DHCP queries with no response. Is this a known problem? As far as I know, it's supposed to work. R's, John PS: If you were wondering, obnoxious airport wifi that cuts you off after an hour and won't let you back on until the next day, keyed by MAC address. em0: port 0x1840-0x185f mem 0xf2600000-0xf261ffff,0xf2625000-0xf2625fff irq 20 at device 25.0 on pci0 em0: Using MSI interrupt iwn0: mem 0xf2500000-0xf2501fff irq 17 at device 0.0 on pci3 iwn0: MIMO 3T3R, MoW, address 00:21:6a:b5:18:48 iwn0: [ITHREAD] iwn0: 11a rates: 6Mbps 9Mbps 12Mbps 18Mbps 24Mbps 36Mbps 48Mbps 54Mbps iwn0: 11b rates: 1Mbps 2Mbps 5.5Mbps 11Mbps iwn0: 11g rates: 1Mbps 2Mbps 5.5Mbps 11Mbps 6Mbps 9Mbps 12Mbps 18Mbps 24Mbps 36Mbps 48Mbps 54Mbps