[Nfd-dev] Interest scoping and broadcast channels

[Junxiao Shi]

Hi Jeff

A locally-scoped Interest (with prefix ndn:/localhost) can never be
satisfied by a Data from a non-local face, because such Data would begin
with ndn:/localhost which could not be transmitted on a non-local face (and
will be dropped if received).

Multicast face has duplicate suppression capability. If both this host and
other hosts are answering with exactly same Data Name, and this host
doesn't care about the content from other host, this scenario can be well
handled by duplicate suppression. See Task 1282 for discussion on this
feature http://redmine.named-data.net/issues/1282

If this host needs to know the content from other host, use NFD's packet
capture feature. The packet capture feature allows a program to listen for
a subset of packets processed by NFD, with filters on face, direction, and
name prefix.
There is no Task for this feature yet. You may also use the workaround
designed by NLSR: express the Interest as soon as you receive it. Strategy
won't transmit it into the multicast face.

Yours, Junxiao
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