Date: Mon, 05 Oct 2009 16:50:10 +0500 From: rihad <rihad@mail.ru> To: Eugene Grosbein <eugen@kuzbass.ru> Cc: freebsd-net@freebsd.org Subject: Re: dummynet dropping too many packets Message-ID: <4AC9DD72.9060802@mail.ru> In-Reply-To: <20091005113037.GA77999@svzserv.kemerovo.su> References: <4AC8A76B.3050502@mail.ru> <20091005025521.GA52702@svzserv.kemerovo.su> <20091005061025.GB55845@onelab2.iet.unipi.it> <4AC9B400.9020400@mail.ru> <20091005090102.GA70430@svzserv.kemerovo.su> <4AC9BC5A.50902@mail.ru> <20091005095600.GA73335@svzserv.kemerovo.su> <20091005100446.GA60244@onelab2.iet.unipi.it> <20091005100532.GC73335@svzserv.kemerovo.su> <4AC9C88A.5050509@mail.ru> <20091005113037.GA77999@svzserv.kemerovo.su>
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Eugene Grosbein wrote: > On Mon, Oct 05, 2009 at 03:20:58PM +0500, rihad wrote: >> Where has TCP slow-start gone? My router box >> isn't some application proxy that starts downloading at full 100 mbit/s >> thus quickly filling client's 1 mbit/s link. It's just a router. > > While there is no or little competition for bandwidth from the router > to clients, TCP would work just fine. I suspect your shaping policy > makes heavy competition between clients. In this case, TCP behaves > not-so-well without help of router's good shaping algorythms > and taildrop is not good one. > Nothing fancy (i.e. no competition). Only tons of per-user pipes simulating the given throughput.
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