Actually I'd be interested to hear what your experience is after you've
tried one (or a couple) of these out.  Now that our department just got a
cluster of 200 linux CPUs setup I was hoping to start testing on modelnet,
but it would be great to get a sense for what this involves.

-Jeff

On 6/29/07, David Andersen <[EMAIL PROTECTED]> wrote:

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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