From owner-freebsd-net@FreeBSD.ORG Wed Jan 23 12:34:24 2013 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by hub.freebsd.org (Postfix) with ESMTP id 208A4930 for ; Wed, 23 Jan 2013 12:34:24 +0000 (UTC) (envelope-from lars@netapp.com) Received: from mx12.netapp.com (mx12.netapp.com [216.240.18.77]) by mx1.freebsd.org (Postfix) with ESMTP id F22E3EB5 for ; Wed, 23 Jan 2013 12:34:23 +0000 (UTC) X-IronPort-AV: E=Sophos;i="4.84,521,1355126400"; d="scan'208";a="10723880" Received: from smtp1.corp.netapp.com ([10.57.156.124]) by mx12-out.netapp.com with ESMTP; 23 Jan 2013 04:34:17 -0800 Received: from vmwexceht01-prd.hq.netapp.com (vmwexceht01-prd.hq.netapp.com [10.106.76.239]) by smtp1.corp.netapp.com (8.13.1/8.13.1/NTAP-1.6) with ESMTP id r0NCYGRW001269; Wed, 23 Jan 2013 04:34:16 -0800 (PST) Received: from SACEXCMBX01-PRD.hq.netapp.com ([169.254.2.51]) by vmwexceht01-prd.hq.netapp.com ([10.106.76.239]) with mapi id 14.02.0328.009; Wed, 23 Jan 2013 04:34:16 -0800 From: "Eggert, Lars" To: "freebsd-net@freebsd.org" Subject: Re: Data Center Bridging? Thread-Topic: Data Center Bridging? Thread-Index: AQHN+LdDgifA/mtK/UqYvtRGZs2iTJhWNxkAgAEpfYA= Date: Wed, 23 Jan 2013 12:34:15 +0000 Message-ID: References: <50FEDF3A.60806@gmail.com> In-Reply-To: <50FEDF3A.60806@gmail.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.106.53.51] Content-Type: text/plain; charset="iso-8859-1" Content-ID: Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Cc: "Vogel, Jack" , Navdeep Parhar 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: Wed, 23 Jan 2013 12:34:24 -0000 Hi, On Jan 22, 2013, at 19:23, Jack Vogel wrote: > I have never implemented this in the FreeBSD drivers primarily because th= e > motivation for it say, in Linux, > was to handle multiple traffic classes, for instance FCOE or iSCSI, but > FreeBSD has not had these features > to implement this for. Give me a reason to do it, and I can see about > adding it :) well, my motivation for asking was that I'll soon have some students invest= igate various options for low-latency reliable communication over a private= fabric. DCB is one candidate. On Jan 22, 2013, at 19:49, Navdeep Parhar wrote: > cxgbe(4) hardware supports DCB/DCBX, but I haven't looked at what it > would take to add driver + OS support. Driver support for either Intel or Chelsio NICs would be great! Lars=