[Ndn-interest] [EXT]question on request and response

marwa kareem m.kareem1305 at coeng.uobaghdad.edu.iq
Wed Jan 27 05:40:53 PST 2021

hi Junxiao

in pic. 1 , the data packet ,in the second request with the rtt=1.8, is a
cached data packet because there is a forwarder so there is a cache and the
rtt is very small, is that correct?
 so if I want to determine the cache hit ratio in a network with multiple
nodes I can use the ndnping, ndnpingserver ?

2 - Is there any ndn- library that is compatible with the p4 programmable
switches? or POF programmable switches?

On Wed, Jan 27, 2021 at 3:58 PM Junxiao Shi <shijunxiao at email.arizona.edu>

> Hi Marwa
>>   Yes, as you have NFD running on the end hosts, they have caching.
>> thanks, now I get it, but is it the same for ndnping, ndnpingserver?
>> the ping is a test for the reachability so the request should go all the
>> way to the destination no matter what, is that correct?
>> the caching is not involved in this? i.e. there is no caching for the
>> data packet of the ndnping because it should go the whole way to determine
>> the RTT?
> There's no concept of *destination* in NDN. Interest can retrieve any
> Data that satisfies it.
> The semantics of a reachability test in NDN is to determine whether the
> client can reach a certain *content*.
> Either a producer or a cache can fulfill the request for content.
> Therefore, it's perfectly fine for the ping Data packets to be cached.
> Yours, Junxiao
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