From owner-freebsd-questions Sun Dec 17 3: 8: 9 2000 From owner-freebsd-questions@FreeBSD.ORG Sun Dec 17 03:08:03 2000 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mailout06.sul.t-online.com (mailout06.sul.t-online.com [194.25.134.19]) by hub.freebsd.org (Postfix) with ESMTP id 8A28E37B400 for ; Sun, 17 Dec 2000 03:08:01 -0800 (PST) Received: from fwd03.sul.t-online.com by mailout06.sul.t-online.com with smtp id 147bfc-00020L-01; Sun, 17 Dec 2000 12:08:00 +0100 Received: from icg-pc202.hofheim.icg-online.de (06192901197-0001@[217.1.125.12]) by fmrl03.sul.t-online.com with esmtp id 147bfO-0aGFrkC; Sun, 17 Dec 2000 12:07:46 +0100 Received: from icg-pc204.hofheim.icg-online.de (icg-pc204.hofheim.icg-online.de [10.1.2.204]) by icg-pc202.hofheim.icg-online.de (8.9.3/8.9.3) with SMTP id MAA69069; Sun, 17 Dec 2000 12:29:36 +0100 (CET) (envelope-from Usselmann.M@icg-online.de) Message-Id: <200012171129.MAA69069@icg-pc202.hofheim.icg-online.de> From: "Manfred Usselmann" To: "Nils Bokermann" Cc: "questions@freebsd.org" Date: Sun, 17 Dec 2000 12:09:04 +0100 (MEZ) Reply-To: "Manfred Usselmann" Priority: Normal X-Mailer: PMMail 2.10.2010 for OS/2 Warp 4.05 In-Reply-To: <20001217113357.A3485@atlas.internal.bermuda.de> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Subject: Re: PPPoE and MTU problem X-Sender: 06192901197-0001@t-dialin.net Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Hi Nils, On Sun, 17 Dec 2000 11:33:57 +0100, Nils Bokermann wrote: >Hi! > >The following problem: I have a DSL-Connection to the internet, and a >few client behind the BSD-Box (see picture). I can do connections to >the internet, nearly everything works. But I DO have 2 systems (which I >desperatly need), which do NOT fragment the packets. When using a Linux >Router (don't blame me for that) everything just works fine. Is there a >problem with my configuration, or is that a BSD-specific-Problem. > >client <-- ethernet (MTU=1500) --> FreeBSD-Box <-- DSL >(MTU=1492)-->Provider(german Telekom) You need to set the MTU size to 1492 on the client too. For a detailed explanation see http://renaud.waldura.com/doc/freebsd-pppoe/ It looks like this will no longer be necessary in future versions of FreeBSD as I read on the site mentioned above: "As of December 2000, ppp now understands the option tcpmssfixup which implements what tcpmssd does below. This version of ppp is included in FreeBSD >= 4.3. This feature is enabled by default, but you can still add it anyway: enable tcpmssfixup to your ppp.conf." > >kruemel# cat /etc/ppp/ppp.conf >default: # or name_of_service_provider > set device PPPoE:rl0 # replace xl1 with your ethernet device > set mru 1450 > set mtu 1450 Why not 1492? You might want to add enable dns as well. Manfred -- ________________________________________________________________________ Manfred Usselmann usselmann.m@icg-online.de To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message