[Nfd-dev] network_region in nfd.conf file

[Junxiao Shi]

Hi John

You may configure the specific router name as network_region:

   - UCLA node: /ndn/edu/ucla/irl/spurs
   - REMAP node: /ndn/edu/ucla/remap/aleph
   - ARIZONA node: /ndn/edu/arizona/nrl/hobo
   - MEMPHIS node: /ndn/edu/memphis/netlab/titan

Consumers are advised to put the following into their forwarding hints:

   - producer at UCLA: /ndn/edu/ucla/irl
   - producer at REMAP: /ndn/edu/ucla/remap
   - producer at ARIZONA: /ndn/edu/arizona/nrl
   - producer at MEMPHIS: /ndn/edu/memphis/netlab

It's important that /ndn/edu/ucla/irl is used to reach a producer who
registers at UCLA (spurs). If only using /ndn/edu/ucla, when the Interest
reaches REMAP (aleph), the router sees the forwarding hint is a prefix of a
network region, so it assumes the Interest has reached the producer region,
and thus queries FIB using the Interest name.
The last "nrl" for ARIZONA and "netlab" for MEMPHIS may be omitted, but
it's better to keep them so as to avoid any issues if a second node is
added on that campus.

Yours, Junxiao

On Tue, Apr 18, 2017 at 9:24 AM, Dehart, John <jdd at wustl.edu> wrote:

>
> All:
>
> i am trying to understand how the network_region is used.
> Here is the text from nfd.conf.sample:
>
>   ; Declare network region names
>   ; These are used for mobility support.  An Interest carrying a Link
> object is
>   ; assumed to have reached the producer region if any delegation name in
> the
>   ; Link object is a prefix of any region name.
>   network_region
>   {
>     ; /example/region1
>     ; /example/region2
>   }
>
>
> As a specific example, lets take the two nodes on the campus of UCLA:
> REMAP and UCLA.
> The current default prefix for UCLA is:     /ndn/edu/ucla
> The current default prefix for REMAP is: /ndn/edu/ucla/remap
>
> Should they both declare a network region of /ndn/edu/ucla
> or should REMAP be more specific and declare /ndn/edu/ucla/remap?
>
> If they both declare a network region of /ndn/edu/ucla does that imply that
> there MUST be a link between the two nodes?
>
> Thanks,
> John
>
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