From owner-freebsd-questions@FreeBSD.ORG Wed May 28 22:09:59 2008 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 D2847106566C for ; Wed, 28 May 2008 22:09:59 +0000 (UTC) (envelope-from dan@dan.emsphone.com) Received: from dan.emsphone.com (dan.emsphone.com [199.67.51.101]) by mx1.freebsd.org (Postfix) with ESMTP id 9D8298FC18 for ; Wed, 28 May 2008 22:09:59 +0000 (UTC) (envelope-from dan@dan.emsphone.com) Received: from dan.emsphone.com (smmsp@localhost [127.0.0.1]) by dan.emsphone.com (8.14.3/8.14.2) with ESMTP id m4SM9v5U003109 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Wed, 28 May 2008 17:09:57 -0500 (CDT) (envelope-from dan@dan.emsphone.com) Received: (from dan@localhost) by dan.emsphone.com (8.14.3/8.14.2/Submit) id m4SM9v6P003108; Wed, 28 May 2008 17:09:57 -0500 (CDT) (envelope-from dan) Date: Wed, 28 May 2008 17:09:56 -0500 From: Dan Nelson To: Rob Message-ID: <20080528220956.GF5582@dan.emsphone.com> References: <2cd0a0da0805281217t4402f319ic708685d51d662b2@mail.gmail.com> <483DB790.2030301@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <483DB790.2030301@gmail.com> X-OS: FreeBSD 7.0-STABLE User-Agent: Mutt/1.5.18 (2008-05-17) Cc: FreeBSD Questions , VeeJay Subject: Re: Does FreeBSD supports TCP Offload Engine (TOE) from Broadcom in Dell PE2950? 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: Wed, 28 May 2008 22:09:59 -0000 In the last episode (May 28), Rob said: > VeeJay wrote: > > Does FreeBSD supports TCP Offload Engine (TOE) from Broadcom in > > Dell PE2950? > > from man bge: > > X v1.0 compliant. It supports IP, TCP and UDP checksum offload > for both receive and transmit, multiple RX and TX DMA rings for > QoS applications, rules-based receive filtering, and VLAN tag > stripping/insertion as well ( i.e. the bge driver does not support TCP data offload ) The embedded NIC in the 2950 is a BCM5708, however, which is handled by the bce driver, and the if_bce.c source has references to TSO, so it might be supported. Best way to find out is to run "ifconfig -m" and see whether TSO4 is listed in the capabilities line for your nic. Then again, a PE2950 should be able to saturate a gigabit NIC quite easily even without any offloading. -- Dan Nelson dnelson@allantgroup.com