[Ndn-interest] Forwarding with partial match

Junxiao Shi shijunxiao at email.arizona.edu
Tue Jul 18 08:16:58 PDT 2017

Hi Tanusree

Interest is never required to exactly match a name prefix served by a
router as indicated in a FIB entry. Instead, the FIB entry name is a prefix
of the Interest name, if that's what you meant by "partial match". For
example, Interest /A/B/1 can be forwarded according to the FIB entry /A.

On the other hand, if an Interest name can only match a part of the FIB
entry name (for example, Interest /A/B/1 vs FIB entry /A/B/1/d), the
Interest does not match the FIB entry at all. If that's the case, in wide
area network, the Interest cannot be forwarded, and a Nack would be
returned to downstream with reason NoRoute. In local area network, a switch
may opt to flood the Interest
in order to locate a node that has the content.

Yours, Junxiao

On Mon, Jul 17, 2017 at 8:25 AM, Tanusree Chatterjee <
tnsr.chatterjee at gmail.com> wrote:

> Hello,
> Whenever an interest reaches to a node which does not match with any name
> prefixes served by any router, rather it partially matches with one, how
> exactly the interest is forwarded? How the probability of getting the data
> is calculated from the partial matching? If any interest is completely new,
> then how the same will be done?
> -- Thanks & Regards,
> Tanusree Chatterjee
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