[ndnSIM] Inconsistent number of sent packets

yao hu huyao0107 at gmail.com
Wed Apr 17 08:36:26 PDT 2013

Hi Alex,

I did not specify any randomization using Randomize parameter. I am not
sure whether all the interests are consumed at the first attempt, but if
that is a reason, the retransmitted Interest packets are not counted into
"Tx Packets"? Besides, I am not sure about the meaning of routingCost
column (2147483647) in FIB. Does it has something different from the
'metric' which affects the forwarding strategy to select the BestRoute?
Could I specify it somewhere?

Sorry for many questions. Thanks very much!


2013/4/17 Alex Afanasyev <alexander.afanasyev at ucla.edu>

> Hi huyao,
> Did you specify any randomization for inter-interest gap using Randomize
> parameter (uniform, exponential)?  Though, by default there is no
> randomization.
> Btw. Do all your interest are getting satisfied from the first attempt?
>  If not, the difference can come from the interest retransmission, since
> those that needs to be retransmitted are sharing the same "cbr" constraints
> as new interests.
> ---
> Alex
> On Apr 16, 2013, at 8:32 AM, yao hu <huyao0107 at gmail.com> wrote:
> > Hi Alex,
> >
> > Just now, in order to verify my modification I used CustomerCbr to
> produce a certain number of Interest from a specific consumer, however, I
> found that there is a little difference between expectation and simulation
> result. For example, I set the Interest frequency as 10 (packets per
> second) for 20 seconds, the result is the number of sent packets is 200
> which is the same as theoretic value. But if I set the Interest frequency
> as 100 for 20 seconds, the simulation result is the number of sent packets
> is 1805 which is less than the theoretic value 2000. What is the possible
> reason for this phenomenon? (No packets are sent from other faces)
> >
> > Thanks for your reply!
> >
> > Regards,
> > huyao
> > _______________________________________________
> > ndnSIM mailing list
> > ndnSIM at lists.cs.ucla.edu
> > http://www.lists.cs.ucla.edu/mailman/listinfo/ndnsim
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