From owner-freebsd-net@FreeBSD.ORG  Thu Jan 22 19:23:28 2004
Return-Path: <owner-freebsd-net@FreeBSD.ORG>
Delivered-To: freebsd-net@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id E3D1816A4CE
	for <freebsd-net@freebsd.org>; Thu, 22 Jan 2004 19:23:28 -0800 (PST)
Received: from ack.Berkeley.EDU (ack.Berkeley.EDU [128.32.206.66])
	by mx1.FreeBSD.org (Postfix) with ESMTP id E2C6943D70
	for <freebsd-net@freebsd.org>; Thu, 22 Jan 2004 19:22:54 -0800 (PST)
	(envelope-from mhunter@ack.Berkeley.EDU)
Received: (from mhunter@localhost)
	by ack.Berkeley.EDU (8.11.3/8.11.3) id i0N3Mrc19741;
	Thu, 22 Jan 2004 19:22:53 -0800 (PST)
Date: Thu, 22 Jan 2004 19:22:53 -0800
From: Mike Hunter <mhunter@ack.Berkeley.EDU>
To: Brooks Davis <brooks@one-eyed-alien.net>
Message-ID: <20040123032253.GB19208@ack.Berkeley.EDU>
References: <20040123011206.GA1701@ack.Berkeley.EDU>
	<20040123012806.GA608@Odin.AC.HMC.Edu>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20040123012806.GA608@Odin.AC.HMC.Edu>
User-Agent: Mutt/1.4i
cc: dell-d800@eicat.ca
cc: freebsd-net@freebsd.org
Subject: 
	Re: Dell D800 (FBSD 5.2-release) Broadcom BCM5705M MTU/Jumbo Problem
X-BeenThere: freebsd-net@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: Networking and TCP/IP with FreeBSD <freebsd-net.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-net>,
	<mailto:freebsd-net-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-net>
List-Post: <mailto:freebsd-net@freebsd.org>
List-Help: <mailto:freebsd-net-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-net>,
	<mailto:freebsd-net-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 23 Jan 2004 03:23:29 -0000

On Jan 22, "Brooks Davis" wrote:

> On Thu, Jan 22, 2004 at 05:12:06PM -0800, Mike Hunter wrote:
> > 
> > I'm going to be trying to get gigabit throughput between my laptop (Dell
> > Latitude D800 running 5.2-release) and a shuttle box running FreeBSD 5.1 
> > (not in front of me at the moment.)  As part of the process, I attempted
> > to increase the frame size on my laptop, only to be greeted with
> > disappointment:
> > 
> > celeste# ifconfig bge0
> > bge0: flags=8802<BROADCAST,SIMPLEX,MULTICAST> mtu 1500
> >         options=1b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING>
> >         ether 00:0b:db:99:d6:06
> >         media: Ethernet 1000baseTX <full-duplex> (none)
> >         status: no carrier
> > celeste# ifconfig bge0 mtu 9000
> > ifconfig: ioctl (set mtu): Invalid argument
> > celeste# ifconfig bge0 mtu 1501
> > ifconfig: ioctl (set mtu): Invalid argument
> > celeste# ifconfig bge0 mtu 1500
> > celeste#
> > 
> > The C file talks about being able to do jumbo frames when the mtu is big
> > enough...anybody know what I'm missing?  My card is a "Broadcom BCM5705M"
> > and I'm running FreeBSD 5.2-release.  When I asked google, it mostly
> > pointed me at comments in if_bge.c talking about jumbo frames :|
> 
> From looking at the code, BCM5705's don't support Jumbo Frames.

Thanks for the help everybody.

"I will not 'read' C files with `grep`.  I will not 'read' C files with
`grep`.  I will not 'read' C files with `grep`...."

Mike