From owner-freebsd-net Thu Feb 21 4:43:38 2002 Delivered-To: freebsd-net@freebsd.org Received: from artemis.drwilco.net (diana.drwilco.net [66.48.127.79]) by hub.freebsd.org (Postfix) with ESMTP id 4020A37B402 for ; Thu, 21 Feb 2002 04:43:34 -0800 (PST) Received: from ceres.drwilco.net (docwilco.xs4all.nl [213.84.68.230]) by artemis.drwilco.net (8.11.6/8.11.6) with ESMTP id g1LChAD98629 (using TLSv1/SSLv3 with cipher DES-CBC3-SHA (168 bits) verified NO); Thu, 21 Feb 2002 07:43:12 -0500 (EST) (envelope-from drwilco@drwilco.net) Message-Id: <5.1.0.14.0.20020221134511.044b1898@mail.drwilco.net> X-Sender: lists@mail.drwilco.net X-Mailer: QUALCOMM Windows Eudora Version 5.1 Date: Thu, 21 Feb 2002 13:53:37 +0100 To: Marcel de Vries , Luigi Rizzo From: "Rogier R. Mulhuijzen" Subject: Re: network buffer problem -/- natd Cc: freebsd-net@FreeBSD.ORG In-Reply-To: <5.1.0.14.2.20020219204129.00b5aa20@outshine> References: <20020219104432.A31233@iguana.icir.org> <5.1.0.14.2.20020219192110.01f45e48@outshine> <5.1.0.14.2.20020219154939.00bb52d8@outshine> <5.1.0.14.2.20020219192110.01f45e48@outshine> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; format=flowed Sender: owner-freebsd-net@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org At 21:19 19-2-2002 +0100, Marcel de Vries wrote: >I use mpd to setup a PPTP (gre encapsulation) connection between interface >ep0 (public) and my Alcatel ADSL modem. >Don't ask me why but it's the concept of a BIG telecom company we all love >to hate in the Netherlands. KPN TELECOM. > >And most of the people use mpd in the Netherlands and find it a >comfortable and more stable solution I think. Yeah, I use it too. >Well I guess mxstream ADSL works fine in most cases. These other paid OS >types like w9x/me, winnt, win2k/XP all can handle PPTP VPN connections >only with the correct DUN version for the early win versions that is. And >almost every ordinary household who owns a computer is running one of the >disgusting platforms mentioned above. And I think it have to work great in >combination with ADSL or else they could flush there concept down the >drains. Because mxstream wants to attract and provide internet for this sector. > >There where a lot problems in the beginning of mxstream but they changed >there design to make it more useful for a internet user. Such as using 10.0.0.0/8 and using NAT! =( Thanks to a few of the internet providers that use MxStream to do ADSL that has been pushed out. (To show you how messed up KPN is at times) >So as most of the BSD community who are in lucky circumstances to own a >ADSL connection would love to use FreeBSD as a router for the rest of the >network. > >I know more people are dealing with packet loss and losing there >connection in use with mxstream ADSL. People that really use there >internet extensive that is ;-) OK so I'm not the only one experiencing this from time to time. I have not seen any bufferspace messages however, am I correct that you don't get that anymore since switching to natd? I haven't had too much time to find out what's going on, but from time to time my connection seems to freeze up, and indeed when I look in top, natd is eating a large chunk of the CPU time. But when I look in trafshow I see something very strange. One connection has an enormous outbound rate. It would be trying to push a few megabytes per second down the 256Kbit upstream that I have (for other MxStream users, yes I have the Fast variant and I'm loving it!). There must be some sort of loop somewhere that's resending the same packet over and over again, as a lot of the times my windows box will be the one responsible for the connection and it's not pumping that data over my internal LAN. Any natd/mpd/netgraph guru's have any hints about where to start looking/how to debug this? If I'm not the only one having this problem I'd like to get this out of the way ASAP. Doc To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message