From owner-freebsd-net@FreeBSD.ORG Mon Aug 16 09:22:46 2010 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 2FE151065698 for ; Mon, 16 Aug 2010 09:22:46 +0000 (UTC) (envelope-from spork@bway.net) Received: from xena.bway.net (xena.bway.net [216.220.96.26]) by mx1.freebsd.org (Postfix) with ESMTP id F21738FC15 for ; Mon, 16 Aug 2010 09:22:45 +0000 (UTC) Received: (qmail 22744 invoked by uid 0); 16 Aug 2010 08:56:05 -0000 Received: from unknown (HELO ?10.3.2.41?) (spork@96.57.144.66) by smtp.bway.net with (DHE-RSA-AES256-SHA encrypted) SMTP; 16 Aug 2010 08:56:05 -0000 Date: Mon, 16 Aug 2010 04:56:03 -0400 (EDT) From: Charles Sprickman X-X-Sender: spork@hotlap.local To: freebsd-net@freebsd.org Message-ID: User-Agent: Alpine 2.00 (OSX 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; format=flowed; charset=US-ASCII Subject: 8.1 em alias changes MAC X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 16 Aug 2010 09:22:46 -0000 Hello, I've run into an odd problem on an 8.1 amd64 box (still running GENERIC) with aliases on the em interface. Config is very simple: em0: flags=8843 metric 0 mtu 1500 options=9b ether 00:14:22:b1:54:18 inet 10.3.2.233 netmask 0xffffff00 broadcast 10.3.2.255 inet 10.3.2.234 netmask 0xffffffff broadcast 10.3.2.234 media: Ethernet autoselect (100baseTX ) status: active One main IP and one alias. The main IP is not giving me any issues, but the alias seems to fall off the network after about 20 minutes or so. Connectivity just drops. I'd initially thought something else had that IP, but that's not the case. Here's what another box sees before the problem starts: ? (10.3.2.233) at 00:14:22:b1:54:18 on sis0 [ethernet] ? (10.3.2.234) at 00:14:22:b1:54:18 on sis0 [ethernet] And then after: ? (10.3.2.233) at 00:14:22:b1:54:18 on sis0 [ethernet] ? (10.3.2.234) at 00:14:22:b1:54:1a on sis0 [ethernet] Note that the MAC for alias has changed... I'm seeing no "xx.xx.xx is using my IP" and I also know I've only got one other box with an em interface in the entire place and it's MAC is 00:30:48:28:87:16. All the other hosts log this: Aug 16 03:02:50 media kernel: arp: 10.3.2.234 moved from 00:14:22:b1:54:18 to 00:14:22:b1:54:1a on em0 Deleting and re-adding the alias works for a bit, then this happens again. Any ideas? pciconf and dmesg snippet below. Thanks, Charles em0: port 0xecc0-0xecff mem 0xfe9e0000-0xfe9fffff irq 32 at device 4.0 on pci2 em0: [FILTER] em0: Ethernet address: 00:14:22:b1:54:18 em0@pci0:2:4:0: class=0x020000 card=0x019a1028 chip=0x10768086 rev=0x05 hdr=0x00 vendor = 'Intel Corporation' device = 'Gigabit Ethernet Controller (82541EI)' class = network subclass = ethernet em1@pci0:4:3:0: class=0x020000 card=0x019a1028 chip=0x10768086 rev=0x05 hdr=0x00 vendor = 'Intel Corporation' device = 'Gigabit Ethernet Controller (82541EI)' class = network subclass = ethernet