Date: Tue, 8 Oct 2002 07:54:49 +1000 From: Peter Jeremy <peter.jeremy@alcatel.com.au> To: Christoph Moench-Tegeder <cmt@rz.uni-karlsruhe.de> Cc: freebsd-stable@FreeBSD.ORG Subject: Re: Traffic shaping Message-ID: <20021007215449.GI495@gsmx07.alcatel.com.au> In-Reply-To: <20021006141906.GB27191@rz-ewok.rz.uni-karlsruhe.de> References: <200210050655.g956t3Mp091313@lurza.secnetix.de> <006501c26d35$f6904720$1001a8c0@jennie> <20021006132624.GA27191@rz-ewok.rz.uni-karlsruhe.de> <1033912218.4051.2.camel@chowder.dons.net.au> <20021006141906.GB27191@rz-ewok.rz.uni-karlsruhe.de>
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On 2002-Oct-06 16:19:08 +0200, Christoph Moench-Tegeder <cmt@rz.uni-karlsruhe.de> wrote: >## Daniel O'Connor (doconnor@gsoft.com.au): > >> Actually, if you limit incoming TCP it will adapt to the correct speed. >> I do this at home without hassle (except the latency in games goes up >> from ~40 to ~100 but it is still acceptable) > >How much do you have to limit TCP for the desired effect? I never >tried shaping on asymmetric lines, and the traffic ratio for a >single TCP bulk transfer (1500 (or little less in case of PPPoE, >PPTP, etc.) bytes incoming vs. 40 bytes outgoing) does not match >the up/down-ratio of his line (1:6) by any means. ipfw/dummynet pipes only handle a single flow direction: If you have something like ipfw NUMBER pipe 1 ip from any to any via ifX then both incoming and outgoing traffic share the pipe and you are limiting the combined uplink and downlink traffic - which probably isn't what you want. Instead, you need two pipes with uplink traffic in one and downlink traffic in the other. Since the pipes are independent, you can set the uplink and downlink limits to suit your ADSL link: ipfw pipe 1 config bw UPLINK kbps ipfw NUMBER pipe 1 ip from any to any out xmit ifX ipfw pipe 2 config bw DOWNLINK kbps ipfw NUMBER pipe 2 ip from any to any in recv ifX Peter To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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