Try ns-2: http://www.isi.edu/nsnam/ns/. It's quite easy.
Also I think this is also good if you like UNIX,
http://www.eecs.harvard.edu/networking/simulator.html
Wang Hui wrote:
>
> Hi folks here,
>
> I am about to set up a small Network Simulation lab as to do some network protocol
>simulations.
> The first thing to do is to choose the software and its platform. But as for me, I
>have no experience
> of working on it, so I have no idea of that. Anyone has any idea? Which network
>software is popular among > this field? Could you drop me a message? Or give me
>some web links?
>
> Thanks in advance.
>
> -Wang Hui.
--
Ping Pan