$ tracepath apinc.org
 1:  10.81.40.87                                           0.180ms pmtu 1500
 1:  10.81.40.1                                            2.488ms 
 1:  10.81.40.1                                            5.975ms 
 2:  10.81.40.1                                            2.507ms pmtu 1350
 2:  192.168.16.254                                      234.437ms 
 3:  172.16.221.252                                      863.056ms 
 4:  70.42.157.253                                       1432.331ms 
 4:  70.42.157.253                                       5437.737ms 
 5:  core2.te5-1-bbnet1.wdc002.pnap.net                  376.710ms 
 6:  TenGigE0-3-4-0.GW1.IAD8.ALTER.NET                   278.242ms 
 7:  0.xe-3-1-1.XL4.IAD8.ALTER.NET                       679.809ms asymm  8 
 8:  0.ae4.BR2.IAD8.ALTER.NET                            739.588ms asymm  9 
 9:  no reply
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10:  if-4-16.tcore1.NYY-NewYork.as6453.net               4527.716ms asymm 15 
10:  if-4-16.tcore1.nyy-newyork.as6453.net               8207.547ms asymm 15 
10:  if-4-16.tcore1.nyy-newyork.as6453.net               7208.603ms asymm 15 
11:  if-6-10.tcore1.PYE-Paris.as6453.net                 6209.354ms asymm 13 
11:  if-6-10.tcore1.pye-paris.as6453.net                 6867.857ms asymm 13 
12:  80.231.154.66                                       1808.962ms 
12:  80.231.154.66                                       9635.174ms 
13:  c4948-bzn-fdt.routers.proxad.net                    460.385ms 
14:  no reply
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29:  10.81.40.1                                           55.763ms !N
     Resume: pmtu 1350