From owner-freebsd-stable@FreeBSD.ORG Fri Feb 25 21:23:48 2005 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 1439916A4CE for ; Fri, 25 Feb 2005 21:23:48 +0000 (GMT) Received: from salmon.maths.tcd.ie (salmon.maths.tcd.ie [134.226.81.11]) by mx1.FreeBSD.org (Postfix) with SMTP id 0109E43D1D for ; Fri, 25 Feb 2005 21:23:47 +0000 (GMT) (envelope-from dwmalone@maths.tcd.ie) Received: from walton.maths.tcd.ie by salmon.maths.tcd.ie with SMTP id ; 25 Feb 2005 21:23:45 +0000 (GMT) Date: Fri, 25 Feb 2005 21:23:45 +0000 From: David Malone To: Jonathan Pater Message-ID: <20050225212345.GA96534@walton.maths.tcd.ie> References: <1109343634.48244.12.camel@yogafrog.blockstackers.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1109343634.48244.12.camel@yogafrog.blockstackers.com> User-Agent: Mutt/1.5.6i Sender: dwmalone@maths.tcd.ie cc: freebsd-stable@freebsd.org Subject: Re: discarded oversize frames X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 25 Feb 2005 21:23:48 -0000 On Fri, Feb 25, 2005 at 10:00:34AM -0500, Jonathan Pater wrote: > fxp0: discard oversize frame (ether type 800 flags 3 len 1515 > max > 1514) > > Is this something I should be > worried about, or is it indicative of something else faulty in the local > network setup? This message is produced if the ethernet card receives a packet that is bigger than permitted by the MTU + the size of the ethernet header. For normal ethernet this means that packets should be <= 1514 bytes. So, there are three ways to eliminate the the message: 1) Find the machine sending oversize packets and stop it. 2) Change the MTU on your interface using ifconfig, this will only work if the other machines on the network expect larget frames. 3) You could edit /usr/src/sys/net/if_ethersubr.c and remove the code that prints this error and then recompile your kernel. David.