From owner-freebsd-current@FreeBSD.ORG Wed Jan 12 21:36:06 2005 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id CA98816A4CE for ; Wed, 12 Jan 2005 21:36:06 +0000 (GMT) Received: from avscan1.sentex.ca (avscan1.sentex.ca [199.212.134.11]) by mx1.FreeBSD.org (Postfix) with ESMTP id 7853B43D3F for ; Wed, 12 Jan 2005 21:36:06 +0000 (GMT) (envelope-from mike@sentex.net) Received: from localhost (localhost.sentex.ca [127.0.0.1]) by avscan1.sentex.ca (8.12.11/8.12.11) with ESMTP id j0CLa5rW089655; Wed, 12 Jan 2005 16:36:05 -0500 (EST) (envelope-from mike@sentex.net) Received: from avscan1.sentex.ca ([127.0.0.1]) by localhost (avscan1.sentex.ca [127.0.0.1]) (amavisd-new, port 10024) with LMTP id 89148-07; Wed, 12 Jan 2005 16:36:05 -0500 (EST) Received: from lava.sentex.ca (pyroxene.sentex.ca [199.212.134.18]) by avscan1.sentex.ca (8.12.11/8.12.11) with ESMTP id j0CLa56l089598; Wed, 12 Jan 2005 16:36:05 -0500 (EST) (envelope-from mike@sentex.net) Received: from simian.sentex.net (simeon.sentex.ca [192.168.43.27]) by lava.sentex.ca (8.12.11/8.12.11) with ESMTP id j0CLZvIh017089; Wed, 12 Jan 2005 16:35:58 -0500 (EST) (envelope-from mike@sentex.net) Message-Id: <6.2.0.14.0.20050112155023.06444c18@64.7.153.2> X-Mailer: QUALCOMM Windows Eudora Version 6.2.0.14 Date: Wed, 12 Jan 2005 16:36:44 -0500 To: freebsd-current@freebsd.org From: Mike Tancsa Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; format=flowed X-Virus-Scanned: by amavisd-new X-Virus-Scanned: by amavisd-new at avscan1b Subject: em0 link transitions when aliasing an interface X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.1 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: Wed, 12 Jan 2005 21:36:06 -0000 Does anyone know of a way to avoid bouncing the em NIC when adding or removing aliases ? In cases where the switch's port blocking kicks in, this can take the box off line for a problematic amount of time. e.g. ifconfig em0 19.168.13.9 netmask 255.255.255.252 alias will down and up the interface. I dont know of any other drivers that work this way. On RELENG_4, it used to only have this problem behavior when the NIC was in autoneg. But this is no longer the case in RELENG_5 as all media-opts (full / half / autoneg) work this way now. Are there any tunables that would govern this behavior ? Thanks for any insight, ---Mike -------------------------------------------------------------------- Mike Tancsa, tel +1 519 651 3400 Sentex Communications, mike@sentex.net Providing Internet since 1994 www.sentex.net Cambridge, Ontario Canada www.sentex.net/mike