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<p class="MsoNormal"><span style="color:#1F497D">Just a tip, but you cannot really determine packet loss on an MPLS network with a traceroute. The nodes between the provider edge routers may not even represent your real path. Also, provider routers within
their network will be handling pings much differently than they handle your actual traffic. The pings require processing whereas your MPLS traffic will be label switched. Much different performance.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Now from the trace below :<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">If you have zero packet loss to the final hop, how could you possibly have packet loss along the path? Answer, you can’t and there is no loss between you and the final hop for your traffic. What you are seeing
is the intermediate node not bothering or being too busy to answer your ping.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Steven Naslund<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Chicago IL<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b>From:</b> NANOG <nanog-bounces@nanog.org> <b>On Behalf Of
</b>K MEKKAOUI<br>
<b>Sent:</b> Monday, September 23, 2019 4:10 PM<br>
<b>To:</b> nanog@nanog.org<br>
<b>Subject:</b> NetworkLayer<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-CA">Hi <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA">Anyone from Network Layer to help? We are experiencing packet loss on the their MPLS network. I have attached a screenshot. Thank you<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA">4 38.140.46.161 0% 31 16.3ms 18.6 6.4 153.1 24.9
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA"> 5 154.54.45.113 0% 31 9.8ms 13.9 9 19.2 2.9 <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA"> 6 62.115.168.46 0% 31 12.5ms 16.3 10.2 66 9.7
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA"> 7 62.115.134.48 0% 31 25.6ms 23.4 16.5 39.2 5.7
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA"> 8 62.115.51.98 0% 31 19.4ms 22.6 16.6 49.9 6.1
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA"> </span><span lang="FR-CA">9 50.97.19.12 0% 31 20.2ms 22 12.8 37.9 4.3 <MPLS:L=388134,E=0>
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="FR-CA">10 50.97.19.15 0% 31 35.9ms 33 28.6 41.7 3 <MPLS:L=361891,E=0> <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="FR-CA">11 50.97.17.30 71% 31 timeout 35.3 29.8 42.8 4.9 <MPLS:L=624054,E=0>
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="FR-CA">12 169.45.18.4 40% 31 58ms 56.4 50.6 61.6 3.1 <MPLS:L=311929,E=0>
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA">13 169.45.18.41 0% 30 149.6ms 62.7 50.5 149.6 23.4
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA">14 169.48.118.131 0% 30 133.4ms 59.8 50.2 133.4 14.7
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA">Karim</span><span lang="FR-CA" style="color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="FR-CA"><o:p> </o:p></span></p>
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