Network simulator

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pradeep067

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Joined
Feb 6, 2007
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Hello
I have to develop a network simulator as a part of my project. I have found various simulator on the internet like ns-2 but none of them giving a proper documentation on how to develop the simulator. So plz some one inform me of any link or ur personal idea on developing a network simulator.
Thanks
Pradeep.

PS: plz mail ur suggestions to [email protected]
 
Joined
Aug 26, 2005
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ns-2/gts are great if you're writing applications and using the libraries as your IO. They can simulate routing protocols / latency / jitter / drop on a system or cluster of systems without ever touching "the wire"

If you're trying to test real-world applications or do some network simulation you're going to need at the very least three systems. One on each end, and a box running something like dummynet/Zebra. (Or a couple of systems, and alot of VM's)

Zebra is an open sourced route daemon that will allow you to run routing protocols. With something like Vmware you could emulate a myriad of topologies and routing protocols.

Dummynet is an open sourced network emulator/bandwidth [mis]manager. It will allow you to introduce entropy based latency/jitter/rate limiting.

So, an example would be to run one VM system with a couple of NIC's [routed] with a Dummynet instance, and as many instances as you want running Zebra. You could then connect a second system and send packets into your network to see how it reacts.

Dummynet:
http://freshmeat.net/projects/dummynet/

Zebra:
http://freshmeat.net/projects/zebra/
 
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