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Traceroute Example

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Traceroute Example

Traceroute Example

This is an example of running a traceroute back to my webserver from my laptop using my Verizon card. You can see where the packets are traversing several Verizon links (myvzw.com), the going onto a Sprint backbone, then Drexel's ISP in Philadelphia, then onto the campus network (144.11.1.10), then to the server. The lines with just asterisks indicate that the machine did not respond to the traceroute probe.

 joe@alice ~ $ traceroute gicl.cs.drexel.edu
 traceroute to gicl.cs.drexel.edu (129.25.6.234), 30 hops max, 40 byte packets
  1  5.sub-66-174-209.myvzw.com (66.174.209.5)  260.024 ms  255.815 ms  259.954 ms
  2  * * *
  3  114.sub-66-174-209.myvzw.com (66.174.209.114)  444.484 ms  259.675 ms  419.975 ms
  4  145.sub-66-174-35.myvzw.com (66.174.35.145)  260.080 ms  260.034 ms  259.778 ms
  5  129.sub-66-174-35.myvzw.com (66.174.35.129)  279.978 ms  279.899 ms  520.170 ms
  6  * 242.sub-66-174-32.myvzw.com (66.174.32.242)  260.016 ms *
  7  193.sub-66-174-31.myvzw.com (66.174.31.193)  279.970 ms  279.910 ms  259.895 ms
  8  sl-gw29-ana-2-3-0.sprintlink.net (160.81.175.217)  484.007 ms  472.021 ms  300.027 ms
  9  sl-bb20-ana-10-0.sprintlink.net (144.232.1.145)  319.854 ms  295.985 ms  280.025 ms
 10  sl-bb24-ana-13-0.sprintlink.net (144.232.1.138)  279.943 ms  299.983 ms  463.775 ms
 11  sl-st21-la-13-0.sprintlink.net (144.232.20.69)  276.066 ms  280.295 ms  359.536 ms
 12  p12-3.core01.lax05.atlas.cogentco.com (154.54.13.41)  300.085 ms  760.123 ms  319.764 ms
 13  * * *
 14  t3-4.mpd01.lax01.atlas.cogentco.com (154.54.6.189)  596.124 ms  311.705 ms  423.963 ms
 15  t2-2.mpd01.iah01.atlas.cogentco.com (154.54.3.37)  1952.030 ms  639.860 ms  300.003 ms
 16  te2-4.mpd01.dca01.atlas.cogentco.com (154.54.2.165)  368.115 ms  339.942 ms  359.925 ms
 17  g11-0-0.core01.dca01.atlas.cogentco.com (154.54.5.53)  339.932 ms  340.110 ms  339.776 ms
 18  p4-0.core01.phl01.atlas.cogentco.com (66.28.4.18)  339.966 ms  343.799 ms  342.446 ms
 19  DrexelUniversity.demarc.cogentco.com (38.112.8.158)  333.512 ms  340.202 ms  343.652 ms
 20  144.118.1.10 (144.118.1.10)  584.225 ms  399.979 ms  419.875 ms
 21  gicl.cs.drexel.edu (129.25.6.234)  339.975 ms  347.967 ms  351.815 ms
 joe@alice ~ $ 

The following is another traceroute following my connection to GMail. It's similar, except that after going through the Sprint links it enters an unidentified ISP and then presumably a Google datacenter. Also of note is the first line, reporting that google.com has multiple possible addresses to use. The name actually resolves to many different machines, just one part of the way they handle the load by splitting requests off to datacenters around the world.

 joe@alice ~ $ traceroute google.com
 traceroute: Warning: google.com has multiple addresses; using 72.14.207.99
 traceroute to 72.14.207.99 (72.14.207.99), 30 hops max, 40 byte packets
  1  5.sub-66-174-209.myvzw.com (66.174.209.5)  259.924 ms  259.755 ms  259.957 ms
  2  * * *
  3  114.sub-66-174-209.myvzw.com (66.174.209.114)  340.160 ms  299.863 ms  259.885 ms
  4  * * *
  5  129.sub-66-174-35.myvzw.com (66.174.35.129)  440.151 ms  256.038 ms *
  6  242.sub-66-174-32.myvzw.com (66.174.32.242)  280.070 ms  263.813 ms  415.993 ms
  7  * * *
  8  * * *
  9  * sl-bb20-ana-10-0.sprintlink.net (144.232.1.145)  476.007 ms  279.801 ms
 10  sl-bb24-sj-10-0.sprintlink.net (144.232.20.101)  280.040 ms  530.122 ms  369.566 ms
 11  sl-bb21-sj-12-0.sprintlink.net (144.232.3.201)  280.087 ms  279.933 ms  279.783 ms
 12  sl-st20-sj-13-0.sprintlink.net (144.232.9.58)  300.025 ms  280.017 ms  319.869 ms
 13  sl-googl1-4-0.sprintlink.net (144.223.242.66)  319.948 ms  443.957 ms  276.031 ms
 14  72.14.236.3 (72.14.236.3)  280.018 ms  280.247 ms  279.765 ms
 15  216.239.46.45 (216.239.46.45)  684.304 ms  443.984 ms 72.14.233.146
         (72.14.233.146)  351.845 ms
 16  72.14.233.146 (72.14.233.146)  351.821 ms  599.917 ms  355.832 ms
 17  66.249.94.94 (66.249.94.94)  364.151 ms 66.249.94.92 (66.249.94.92)  355.864 ms
         580.033 ms
 18  66.249.94.50 (66.249.94.50)  335.842 ms 72.14.236.134 (72.14.236.134)
         360.085 ms 66.249.94.50 (66.249.94.50)  339.935 ms
 19  72.14.207.99 (72.14.207.99)  355.944 ms  336.095 ms  467.767 ms
 joe@alice ~ $ 

Sadly, I couldn't get a full traceroute through to any machines I could think of easily on the other side of the world.

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