Re: [ns] Wireless + Exponential/Pareto Traffic Generator doubt

[sameer tilak <sam_tilak@yahoo.com>]

Hi Brian,
Thanks for the help and information. In case of wired
scenario all the traffic generators seem to work fine.
[ ref. tg.tcl in the tcl/ex directory]. So as you have
said this is the problem with the wireless model only
right ?

I could not understand the meaning of changing source
in my code that trace would understand... Is it that I
need to use for eg. CBR instead of Expo/Pareto as
thats supported in trace... 

Is it true that in case of wireless model Expo and
Pareto were no tested before ?

Regards,
-Sameer Tilak.

--- Brian Lee Bowers <bowersb@lanl.gov> wrote:
> On Monday 02 July 2001 09:07, you wrote:
> 
> > (null)- invalid packet type (exp).
> 
> A quick search turned up cmu-trace.cc as the home
> for this particular 
> message.  It would seem that the exponential traffic
> generator is 
> setting the packet type to exp (probably a defined
> constant of 
> PT_EXP, but I didn't look that hard :).  When method
> format gets the 
> packet, it uses the packet type in a switch-case
> construct.  There is 
> no case that matches "exp", so it defaults to
> printing out "invalid 
> packet type".
> 
> This begs a larger question:  why are traffic
> generators changing the 
> types of the packets?
> 
> > I am getting the same error with Pareto as well.
> 
> I'm guessing that Pareto changes the packet type to
> something that 
> the trace functions don't understand.
> 
> > The same thing works fine if I change the agent to
> > CBR...
> 
> The trace functions have a case for CBR type
> packets.  So CBR should 
> cause no problems.  I still don't know why we care
> if the packets 
> were generated from a CBR source.
> 
> > Please tell me do I need to make some changes
> during
> > the configuration of the ndoe itself ?
> 
> You would have to change the source to something
> that the trace 
> functions understand; or you could change the source
> code for the 
> trace functions to make them understand the exp
> packet type.
> 
> -- 
> Brian Lee Bowers	|	RADIANT Team (Summer Intern)
> bowersb@lanl.gov	|	Los Alamos National Laboratory


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