Re: [ns] NS vs. OPNET on simulation speed and simulation of largenetwork

[Xuan Chen <xuanc@ISI.EDU>]

There were some discussions on this topic. You can search for 'OPNET' at:

http://www.isi.edu/nsnam/htdig/search.html

Thanks.
-chen xuan
On Mon, 17 Jul 2000, Chi-Jiun Su wrote:

> Dear Sir/Madam,
> 
> We're currently using OPNET for the end-to-end simulation of satellite
> networks and simulation seems slower as we add more users.
> 
> Some sources are claiming NS is faster than OPNET and so we're thinking
> of switching to NS.
> 
> In order to make correct decision for us, Could you answer the following
> questions?
> 
> ** Is NS releally faster than OPNET? (Any fair comparison is done?)
>  If so, how much?
> 
> ** Can NS simulate more nodes than OPNET (simulation of large networks)?
> 
> **What other advantages NS has over OPNET in addition to the following:
> # NS is Free of charge
> # NS is used by Top-notch research work like TCP and therefore OPNET is
> lagging behind NS in new TCP stuff.
> # NS can be run in LINUX and so it is possible for parallel/speedup
> simulation
> 
> 
> Thanks in advance.
> 
> Chi-Jiun Su
> Advanced Development Group
> Hughes Network System
> Germantown MD 20760  USA
> 

-- 
Xuan Chen
ISI/USC