[ndnSIM] Forwarder's onIncomingInterest

[Junxiao Shi]

Hi John


> I re-read the NFD documentation and it does seem to suggest that
> onIncomingInterest is called for all incoming interests (and localhost
> stuff too)


That's correct.


> Anyway, I'm only detecting a single incoming interest entering on faces
> into the router for content, when it should be around 300 times (10 / sec.
> For 30 seconds, simulated)
>

If it is a management Interest (under /localhost/nfd prefix), check your
FIB setup.
If it is an application Interest, and if you are sending the same Interest
over and over from the consumer apps as mentioned in
http://www.lists.cs.ucla.edu/pipermail/ndnsim/2017-June/003870.html , this
is caused by Interest aggregation and Data caching at the consumer NFD.
When multiple consumer apps send the same Interest, only one is forwarded
to the router, and the Data will be returned to all applications.
Afterwards, the Data is in the consumer NFD's cache and will be used to
satisfy future Interests of the same name.

Yours, Junxiao
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