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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">Hi Davide,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">Yes, but doesn’t this approach require:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">1) pcap access on each (potential) node in the path (I have this on some but not all)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">2) capturing potentially a lot of traffic (if on, say, a testbed node and I did have access)
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">3) then having to gather all capture records from the various hosts and filter on names/nonces<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">That’s what I meant by manually instrumenting each node, which I can do for some nodes, but not the testbed nodes. It also seems to require a lot of instrumentation and post-gathering/-filtering
(and access) effort that grows quickly as the number of nodes increase. I guess what I’m looking for is whether anyone has returned to work on something that looks a little more like traceroute in its usage?
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">Thanks,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">Jeff<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-family:Calibri;color:black">From: </span>
</b><span style="font-family:Calibri;color:black">Davide Pesavento <davide.pesavento@lip6.fr><br>
<b>Date: </b>Thursday, September 8, 2016 at 2:33 AM<br>
<b>To: </b>Jeff Burke <jburke@remap.ucla.edu><br>
<b>Cc: </b>"nfd-dev@lists.cs.ucla.edu" <nfd-dev@lists.cs.ucla.edu><br>
<b>Subject: </b>Re: [Nfd-dev] Troubleshooting interest path<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On Thu, Sep 8, 2016 at 7:23 AM, Burke, Jeff <<a href="mailto:jburke@remap.ucla.edu" target="_blank">jburke@remap.ucla.edu</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt">I doubt my problem is complicated. But in trying to figure out why this doesn’t work, I am curious what the state-of-the-art is for tracing Interest/Data
exchange? If I want to see whether an Interest expressed by Consumer hits the Repo, is my only solution to watch the logs in NFD2 (or for anything potentially in the path, in a larger example), keep track of which face Repo corresponds to and see if things
are forwarded? Repo-ng doesn’t seem to say/log much itself.. but more generally the question here is about whether there are techniques to do Interest/Data packet tracing without manually- or custom- instrumenting each potential node in the path(s). </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Hi Jeff,<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">You can use ndndump, or you can capture a trace in pcap format and then read it with Wireshark + the NDN dissector. Both are available in the ndn-tools repository.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Thanks,<o:p></o:p></p>
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<p class="MsoNormal">Davide<o:p></o:p></p>
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