[Nfd-dev] Help needed with debugging duplicate Nonce

[Ashlesh Gawande (agawande)]

On the latest experiment (which used tcpdump rather than ndndump) whose data I attached I didn't use /localhop - I can use it and send it again?

(The earlier one I sent to Junxiao had the /localhop)


Ashlesh

________________________________
From: Lan Wang (lanwang)
Sent: Monday, June 27, 2016 1:30:42 PM
To: Junxiao Shi
Cc: Ashlesh Gawande (agawande); nfd-dev at lists.cs.ucla.edu
Subject: Re: [Nfd-dev] Help needed with debugging duplicate Nonce

We used /localhop in the name.  Why were the packets forwarded beyond one hop?

Lan

On Jun 27, 2016, at 1:26 PM, Junxiao Shi <shijunxiao at email.arizona.edu<mailto:shijunxiao at email.arizona.edu>> wrote:

Hi Ashlesh

Just looking at the six transmissions you summarized, this should be expected behavior.
5. A returns Nack-Duplicate to B in reply to Interest 3, because the same Nonce is seen in Interest 1
6. B returns Nack-Duplicate to A in reply to Interest 4, because the same Nonce is seen in Interest 2

Afterwards, if either A or B has the Data, it would go to consumer C.

Yours, Junxiao

From: Ashlesh Gawande (agawande)<mailto:agawande at memphis.edu>
Sent: Monday, June 27, 2016 11:04
To: nfd-dev at lists.cs.ucla.edu<mailto:nfd-dev at lists.cs.ucla.edu>
Subject: [Nfd-dev] Help needed with debugging duplicate Nonce

Hi all

I was running a simple three node topology in Mini-NDN (no experiment, simply: sudo minindn topology_file):

                          a
                        /     \
                 10 /        \ 10
                     /           \
                    b----------c
                          10

Seems like:
1) c sends interest to a
2) c sends same interest to b
3) b sends same interest to a
4) a sends same interest to b
5) a sends NACK [Duplicate] to b
6) b sends NACK [Duplicate] to a

So are these duplicate NACKs expected behavior?


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