Re: why ipfw for dummynet

From: Alex Rousskov (rousskov@measurement-factory.com)
Date: Thu Dec 07 2000 - 08:27:55 MST


On Thu, 7 Dec 2000, Thomas Proell wrote:

> In the polymix3 setup it is suggested to set up the ipfw rules
> to delay the response times. I don't understand, why.

DummyNet is used to simulate WAN packet delays and loss. You may find
the following discussion useful:
    http://polygraph.ircache.net/Workloads/PolyMix-2/#WAN_Simulation

> Moreover, I don't have ipfw any more, since ipfwadm and ipchains
> are default on newer machines.

I am not sure what "newer machines" are. As far as I can see, FreeBSD
4.1 has ipfw. Perhaps you are talking about Linux environment. If so,
please see
 http://polygraph.ircache.net/cgi-bin/mail2html.cgi?fnames=20000701/854

HTH,

Alex.



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