From owner-freebsd-net@FreeBSD.ORG Mon Jul 16 17:15:45 2007 Return-Path: X-Original-To: freebsd-net@freebsd.org Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id C640716A404 for ; Mon, 16 Jul 2007 17:15:45 +0000 (UTC) (envelope-from barnaclewes@gmail.com) Received: from ug-out-1314.google.com (ug-out-1314.google.com [66.249.92.170]) by mx1.freebsd.org (Postfix) with ESMTP id 5921C13C461 for ; Mon, 16 Jul 2007 17:15:45 +0000 (UTC) (envelope-from barnaclewes@gmail.com) Received: by ug-out-1314.google.com with SMTP id o4so1146126uge for ; Mon, 16 Jul 2007 10:15:44 -0700 (PDT) DKIM-Signature: a=rsa-sha1; c=relaxed/relaxed; d=gmail.com; s=beta; h=domainkey-signature:received:received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=YslY5femMU6QYqpyT0P6HnDs6mYwLa2PeFkFhfv/5Ix6lYDJsYtFxq+xhg416TPmRTwrMrRYhBIE8HHfOweqrg1ZbUJOBpQnLhw0IZzn15onhnj3eBqHnRYT+plw0zemj+qZv66whtydW8Cx71Kb8sNKtjoaCf9Vv4OkoLZMLho= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=K2V4spcDv+cmAo3O+m8GICv8wf6o2rp/I8lNouZ7Qrexmxs/HnMbS0E+208Y88+vNUmlrAY2/QqqDvHEnDwDAmKrwNmKmpvodEcAU43c0gtlfOgQXfUM8gvJLSyH70nKztmavMIVjsFVUQHmpUzeACcsRtoA+vQtyN8IyPBshCo= Received: by 10.78.180.16 with SMTP id c16mr1232351huf.1184604519930; Mon, 16 Jul 2007 09:48:39 -0700 (PDT) Received: by 10.78.201.4 with HTTP; Mon, 16 Jul 2007 09:48:39 -0700 (PDT) Message-ID: Date: Mon, 16 Jul 2007 09:48:39 -0700 From: "Wes Peters" To: "Sten Daniel Soersdal" In-Reply-To: <469B9516.2090904@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <46967C5C.5040505@seclark.us> <469772DA.1000700@gmail.com> <46977741.8090301@seclark.us> <4698D290.5080004@gmail.com> <46992021.8090603@seclark.us> <469B9516.2090904@gmail.com> Cc: Stephen.Clark@seclark.us, freebsd-net@freebsd.org Subject: Re: 6.2 mtu now limits size of incomming packet X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 16 Jul 2007 17:15:45 -0000 On 7/16/07, Sten Daniel Soersdal wrote: > > I guess it wouldn't hurt for the operating system to accept larger > frames, as long as only the correctly sized frames are transmitted. > > There are alot of people, including myself, that assume a host can't > receive a frame that is larger than MTU. Perhaps it should be noted in > the man pages about this behavior in addition? I've bumped into this issue several times before. A look at the ifconfig man page will show a way to set the interface mtu, but not the mru. FreeBSD has always used the mtu as the mru for the interface, which is arguably wrong. In every case I've encountered this problem, the user had truly mis-configured some part of the network and correct configuration solved the problem, so I've never been fully convinced it needed to be fixed. -- Against stupidity the very gods Themselves contend in vain. Friedrich Schiller