Ah, that's exactly what I was looking for.  Thanks!

-david 

> -----Original Message-----
> From: [EMAIL PROTECTED] [mailto:p2p-hackers-
> [EMAIL PROTECTED] On Behalf Of David Andersen
> Sent: Thursday, June 28, 2007 8:31 PM
> To: theory and practice of decentralized computer networks
> Subject: Re: [p2p-hackers] Software Network Simulator
> 
> ns2 is a full simulation environment.  It sounds almost like David
> wants something more like Dummynet (FreeBSD) or NISTNet (Linux) or
> Modelnet (Linux?) or one of the other variants that lets you do
> traffic shaping/emulation.  It takes some work to get them to work
> with virtual interfaces, and even more work to get them to work with
> virtual routing tables, but it can be done.  The Emulab folks have
> done this with Dummynet on FreeBSD machines putting each node in a
> jail;  I think others have done it by using virtual machines for the
> per-process encapsulation.
> 
>    -Dave
> 
> On Jun 28, 2007, at 11:03 PM, Priyanka Sinha wrote:
> 
> > ns2 ? ... there are quite a few more as well... (like j-sim.. opnet
> > is a pretty well known commercial one) .. If you'd like an
> > emulator,. i think ns2 also allows you to emulate ( as in then the
> > simulated traffic uses your network drivers i suppose .. havent
> > tried it)
> >
> > Priyanka
> > On 6/28/07, David Barrett <[EMAIL PROTECTED]> wrote:
> > Does anybody know of a software network simulator that works on a
> > single computer (ie, isn't a separate device that you plug into)?
> > I'm thinking the ideal thing would create two virtual network
> > interfaces that in practice work like localhost, except with
> > configurable latency and packet loss characteristics.
> >
> >
> > Any tips?
> >
> >
> > -david
> >
> >
> >
> >
> >
> >
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