Date: Sun, 17 Dec 2000 12:09:04 +0100 (MEZ) From: "Manfred Usselmann" <Usselmann.M@icg-online.de> To: "Nils Bokermann" <nilsb@bermuda.de> Cc: "questions@freebsd.org" <questions@freebsd.org> Subject: Re: PPPoE and MTU problem Message-ID: <200012171129.MAA69069@icg-pc202.hofheim.icg-online.de> In-Reply-To: <20001217113357.A3485@atlas.internal.bermuda.de>
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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
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