From owner-freebsd-net@FreeBSD.ORG Thu Dec 11 17:31:29 2014 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 386D3D8D for ; Thu, 11 Dec 2014 17:31:29 +0000 (UTC) Received: from SMTP02.CITRIX.COM (smtp02.citrix.com [66.165.176.63]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (Client CN "mail.citrix.com", Issuer "Cybertrust Public SureServer SV CA" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 866A3334 for ; Thu, 11 Dec 2014 17:31:27 +0000 (UTC) X-IronPort-AV: E=Sophos;i="5.07,558,1413244800"; d="scan'208";a="203475560" Received: from [127.0.0.1] (10.80.16.47) by smtprelay.citrix.com (10.13.107.79) with Microsoft SMTP Server id 14.3.210.2; Thu, 11 Dec 2014 12:29:49 -0500 Message-ID: <5489D48C.10306@citrix.com> Date: Thu, 11 Dec 2014 18:29:48 +0100 From: =?windows-1252?Q?Roger_Pau_Monn=E9?= User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:31.0) Gecko/20100101 Thunderbird/31.3.0 MIME-Version: 1.0 To: Ryan Stone , "David P. Discher" Subject: Re: EM(4) - Link flap when bridged and adding members (em bridge flap) References: In-Reply-To: Content-Type: text/plain; charset="windows-1252" Content-Transfer-Encoding: 7bit X-DLP: MIA1 Cc: FreeBSD Net X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 11 Dec 2014 17:31:29 -0000 El 10/12/14 a les 19.25, Ryan Stone ha escrit: >>From a quick look at the code, whenever an interface is added to a > bridge, if that interface does not support a feature currently enabled > on the bridge then it has to disable that feature on all member > interfaces of that bridge. That would re-init the em interface, which > would cause a link flap. This is something specific to the em driver implementation I guess, because I've tried it with other drivers (bge and bce) and the connection is not dropped when the normalization of options happens. Roger.