[ndnSIM] NDN Routing question

[Carl Zu]

John,

Correct, however, let us consider a couple of points:

1. if multicast strategy is used, node failure should not significantly
impact the performance.

2. most likely, there are cached copies available before the failed node,
unless you consider small cache sizes.

Even if you like to use a single-path routing approach, you can switch to
multi-path routing when you observe an Interest timeout.

Best regards,
C

On Sun, Jun 3, 2018 at 9:57 AM, John Baugh <jpbaugh at umich.edu> wrote:

> Greetings all,
>
>
> I've been studying and working with ICN, NDN, and ndnSIM for quite some
> time now.  I've read tons of papers on many of the different
> characteristics and issues within NDN.
>
> One thing I haven't really seen addressed is the following:  in NDN, a
> Data packet will take the reverse route that the Interest packet took,
> correct?
>
> So, what happens if one of the intermediate routers goes down?  Does the
> entry in the PIT just time out, and the consumer eventually re-transmits
> the Interest packet?  Or is there any way to route around the
> malfunctioning/dead router?
>
> Thanks,
>
> John
>
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