From mboxrd@z Thu Jan 1 00:00:00 1970 From: Clemens Sibon sibon@triple-it.nl Date: Thu, 19 Oct 2000 13:30:44 +0000 Subject: SV: [LARTC] How to mark and queue Message-Id: List-Id: References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: lartc@vger.kernel.org 
Hi there,
>
> Daniel Bergqvist (daniel@netatonce.se) wrote:
> > How do you want the packets be dropped? What do you want to
> > achieve? Which
> > rules will control which packets get dropped?
>
> We have performed some measurements of packet drops on real
> WAN link.  I
> would like to reproduce the characteristics of (congested)
> WAN link/router
> as close as possible.  Rules for dropping will not be based on packet
> contents but on a random variable with certain distribution
> which in turn
> depends on parametars such as packet size (e.g. for voice traffic).

I've been told that for FreeBSD (sorry :-) there is the dummynet-device,
which has been specifically created to do such tests. Maybe this is
off-topic but it could be what you're looking for!

Check http://info.iet.unipi.it/~luigi/ip_dummynet/ for details.

Greetings,

Clemens Sibon