From owner-freebsd-questions@FreeBSD.ORG Wed Sep 15 02:36:21 2010 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 B13A6106564A for ; Wed, 15 Sep 2010 02:36:21 +0000 (UTC) (envelope-from dnewman@networktest.com) Received: from mail3.networktest.com (mail3.networktest.com [69.55.234.104]) by mx1.freebsd.org (Postfix) with ESMTP id 8354B8FC18 for ; Wed, 15 Sep 2010 02:36:21 +0000 (UTC) Received: from localhost (localhost [69.55.234.104]) by mail3.networktest.com (Postfix) with ESMTP id F10A511F8FF for ; Tue, 14 Sep 2010 19:19:21 -0700 (PDT) Received: from mail3.networktest.com ([69.55.234.104]) by localhost (mail3.networktest.com [69.55.234.104]) (amavisd-maia, port 10024) with ESMTP id 04635-09 for ; Tue, 14 Sep 2010 19:19:21 -0700 (PDT) Received: from sagan.local (cpe-76-83-7-25.socal.res.rr.com [76.83.7.25]) (using TLSv1 with cipher DHE-RSA-CAMELLIA256-SHA (256/256 bits)) (No client certificate requested) (Authenticated sender: dnewman@networktest.com) by mail3.networktest.com (Postfix) with ESMTPSA id 36B0511F8CE for ; Tue, 14 Sep 2010 19:19:21 -0700 (PDT) Message-ID: <4C902D28.2040206@networktest.com> Date: Tue, 14 Sep 2010 19:19:20 -0700 From: David Newman User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.9) Gecko/20100825 Lightning/1.0b2 Thunderbird/3.1.3 MIME-Version: 1.0 To: freebsd-questions@freebsd.org Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Subject: jumbo frame support in bge(4) for BCM5704 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, 15 Sep 2010 02:36:21 -0000 8.0-RELEASE amd64, Tyan S2882-D motherboard, Broadcom BCM5704C gigabit Ethernet transceivers Looking for clues on enabling jumbo support on BCM5704 chips. The bge(4) manpage claims this interface supports jumbo frames, as does Broadcom's data sheet. However, 'ifconfig bge0 mtu 9000' returns an error, as does 'ifconfig bge0 mtu 1500': ifconfig: ioctl (set mtu): Invalid argument Also, this thread claims the manpage anddata sheet are in error and that jumbos aren't supported: http://lists.freebsd.org/pipermail/freebsd-net/2006-June/010866.html The Linux tg3 driver for this chip does support jumbos up to 9000 bytes but that doesn't necessarily answer whether the hardware can get there. Thanks in advance for any clues on enabling jumbos on this system. dn