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<div class="">On May 7, 2017, at 12:33 PM, Junxiao Shi <<a href="mailto:shijunxiao@email.arizona.edu" class="">shijunxiao@email.arizona.edu</a>> wrote:</div>
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<div class="">Hi John
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<div class="">Yes, this makes sense. Sending Interests with 10 random components at the end would make NameTree to have 10x entries as PIT entry.</div>
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I’m not sure I quite understand ths. Lets say I have 5 Interests:</div>
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<div>/abc/zyx/1234</div>
<div>/abc/zyx/2345</div>
<div>/abc/zyx/3456</div>
<div>/abc/zyx/4567</div>
<div>/abc/zyx/5678</div>
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<div>And lets say they are all still in the PIT, unsatisfied and have not timed out.</div>
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<div>How many NameTree entries would you expect there to be?</div>
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<div class="">On the oher hand, PIT entry count seems high. If the node isn't currently handling heavy traffic, this indicates a previous Interest flooding attack in which InterestLifetime was set to a large value.</div>
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That is exactly the kind of extreme case we did. It was a bit of an accident but it is what ended up happening.</div>
<div>We were trying to load the CS with pre-recorded packets. So, we used tcpreplay to send a batch of interests with</div>
<div>long lifetimes, then used tcpreplay to send a batch of matching data.</div>
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<div>Thanks,</div>
<div>John</div>
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<div class="">Yours, Junxiao</div>
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<div class="">On Sun, May 7, 2017 at 09:28 Dehart, John <<a href="mailto:jdd@wustl.edu" class="">jdd@wustl.edu</a>> wrote:</div>
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<div class="">We also have an extreme example:</div>
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<span style="font-variant-ligatures:no-common-ligatures;font-family:Consolas,monospace;font-size:10pt" class=""> nNameTreeEntries=1673990</span></div>
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<span style="font-variant-ligatures:no-common-ligatures" class=""><span style="font-family:Consolas,monospace;font-size:10pt" class=""> </span><span style="font-family:Consolas,monospace;font-size:10pt" class="">nFibEntries=3</span></span></div>
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<span style="font-variant-ligatures:no-common-ligatures" class=""><span style="font-family:Consolas,monospace;font-size:10pt" class=""> </span><span style="font-family:Consolas,monospace;font-size:10pt" class="">nPitEntries=167400</span></span></div>
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<span style="font-variant-ligatures:no-common-ligatures" class=""><span style="font-family:Consolas,monospace;font-size:10pt" class=""> </span><span style="font-family:Consolas,monospace;font-size:10pt" class="">nMeasurementsEntries=0</span></span></div>
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<span style="font-variant-ligatures:no-common-ligatures" class=""><span style="font-family:Consolas,monospace;font-size:10pt" class=""> </span><span style="font-family:Consolas,monospace;font-size:10pt" class="">nCsEntries=252277</span></span></div>
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<span style="font-variant-ligatures:no-common-ligatures" class=""><span style="font-family:Consolas,monospace;font-size:10pt" class="">where there are on the order of 10 times more name tree entries than PIT entries.</span></span></div>
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<span style="font-variant-ligatures:no-common-ligatures" class=""><span style="font-family:Consolas,monospace;font-size:10pt" class="">Does that make sense?</span></span></div>
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<span style="font-variant-ligatures:no-common-ligatures" class=""><span style="font-family:Consolas,monospace;font-size:10pt" class="">John</span></span></div>
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