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Date: Mon, 5 Oct 2009 17:56:00 +0800
From: Eugene Grosbein <eugen@kuzbass.ru>
To: rihad <rihad@mail.ru>
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Cc: freebsd-net@freebsd.org
Subject: Re: dummynet dropping too many packets
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On Mon, Oct 05, 2009 at 02:28:58PM +0500, rihad wrote:

> Oh, I almost forgot... Right now I've googled up and am reading this 
> intro: http://www-rp.lip6.fr/~sf/WebSF/PapersWeb/iscc01.ps
> 
> So turning to GRED would turn my FreeBSD router from dumb into a smart 
> router that knows TCP? I thought pushing bits around at a lower level, 
> and a sufficient queue size were enough.

No, it will still deal with IP packets but more clever.

> Still not sure why increasing queue size as high as I want doesn't 
> completely eliminate drops.

The goal is to make sources of traffic to slow down, this is the only
way to descrease drops - any finite queue may be overhelmed with traffic.
Taildrop does not really help with this. GRED does much better.

Eugene Grosbein