Date: Tue, 8 Oct 2002 01:22:40 +0200 From: Christoph Moench-Tegeder <cmt@rz.uni-karlsruhe.de> To: freebsd-stable@FreeBSD.ORG Subject: Re: Traffic shaping Message-ID: <20021007232239.GB16659@rz-ewok.rz.uni-karlsruhe.de> In-Reply-To: <20021007215449.GI495@gsmx07.alcatel.com.au> 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> <20021007215449.GI495@gsmx07.alcatel.com.au>
next in thread | previous in thread | raw e-mail | index | archive | help
## Peter Jeremy (peter.jeremy@alcatel.com.au): > 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. Yes, I see. My last experience with things like this suffered a little from a slightly underfunctional implementation of bandwidth control (and using dummynet/FreeBSD was not an option). I only had control over the outgoing queue on the external interface, so I tried slowing down slow start by limiting the acks from teh destination to the source of the transfer based on calculations with packet sizes and -rates (which seemed to be more than a little unreliable). [Perhaps I could construct a scenario with some more interfaces, where limiting the outgoing rates would be easier, but that would be too far fetched for now]. So my problem in short: How much do I have to limit acks in the direction with the lower bandwidth in order to control the usage of the other direction? This is a little away from the original thread, but I just would like to know (might come in handy some time and perhaps I can "ptimize" my old "solution" a little with other people's experience). Regards, cmt -- Spare Space To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20021007232239.GB16659>