Re: Very strange sim results

[Biaz Saad <saadb@cs.tamu.edu>]

Are you using a lossy link ?

If so, check that your error model is correctly initialized,
specially in errmodel.cc if you are using an old version of ns-2.

Saad.



On Fri, 6 Nov 1998, Christof Brandauer wrote:

> Dear ns-users!
> 
> I've come across a (from my point of view) very strange behavior of ns
> that I can't explain.
> 
> I run a simple simulation (I attached the script) where I
> "trace-queue" one link. 
> 
> >From the trace output "queue.tr" I count the # of dropped packets
> doing a:
> 
> % grep ^d queue.tr | wc -l
> 
> which results in 0.
> 
> 
> Then I run the sim again, but this time schedule one additional event:
> 
> $ns at 25.0 "puts \"Very strange.\""
> 
> I would have thought that this should not have any effect on the sim
> itself. However I get a different "queue.tr", including 43 packet drop
> events. 
> 
> I'd greatly appreciate it if anyone could clear things up for me.
> 
> thx in advance,
> chris
> 
>  -----------------------------------------------------------------
>   Christof Brandauer                        cbrand@cosy.sbg.ac.at
>   Student of Applied Informatics                 
>   Department of Computer Science, University of Salzburg, Austria
>  -----------------------------------------------------------------
> 
> 

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Saad Biaz (Abou Youssef & Rim)		Graduate Research Assistant	
Texas A&M University			Office : (409) 845-5007
Department of Computer Science		Home   : (409) 862-9135
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