[Ndn-interest] Data comes from another face?

[Junxiao Shi]

Hi Sabet

As I understand you question is:
In a network of NDN nodes where none of the nodes is using broadcast
strategy, if a node has not forwarded an Interest out of an interface, is
it possible for this node to receive a Data on this interface?

The answer is YES.
Think about a multi-access link with 3 hosts P Q R.

   1. Q sends an Interest. P and R receive this Interest,
   2. P replies with a Data. Q and R receive this Data.

In this scenario, R has not forwarded an Interest to the multi-access link,
but receives a Data from the multi-access link.

Yours, Junxiao

On Wed, May 20, 2015 at 11:17 AM, Muhammad Hosain Abdollahi Sabet <
M.AbdollahiSabet at mail.sbu.ac.ir> wrote:

>  Hi,
> We all know that data packets follow breadcrumbs which interest packets
> leave behind. And we expect to receive data packets from the same face
> which interests have already been forwarded to, according to correspondent
> fib entries, right? So, when the second sentence won't happen? I mean a
> node receive a data packet matching a pit entry, from a face that the
> interest has not been forwarded to, according to the fib entry. If a node
> choose to broadcast for forwarding strategy, such a situation happens. I
> know that. But is there any other condition?
>
> Thanks,
> Sabet
>
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