If you haven't used traceroute before, you might find it useful to play with it. It should be available on any Unix system.
This dataset consists of traceroute measurements repeatedly conducted between a set of Internet hosts. The point of the measurements was to obtain a representative view on the behavior of Internet routing, with one key question (though not the only one) being to what degree are routes stable, i.e., the route stays unchanged for a lengthy period of time.
The measurement methodology included pairing the measurements: that is, when conducting a measurement from A to B, at the same time also conduct one from B to A.
Note, this is actual data from a large-scale measurement study, presented in its entirety (other than I left out a number of additional measurements that used somewhat differing methodologies).
A typical measurement looks something like:
That is, a first line describing the measurement being conducted, a blank line, and then a list of each of the hops in the measured route, with an Internet ("IP") address like 22.214.171.124 followed by 3 time measurements corresponding to the time it took to receive back the 3 probes sent to that hop. Each numbered hop represents one step closer along the route towards the destination (which appears in the final hop) and away from the source. (Note that the first hop is not the source but a "router" to which the source has a direct connection.)
traceroute to frog.rhic.bnl.gov (126.96.36.199), 30 hops max, 40 byte packets 1 188.8.131.52 2.209 ms 1.927 ms 1.872 ms 2 184.108.40.206 5.002 ms 2.333 ms 2.342 ms 3 220.127.116.11 3.468 ms 4.128 ms 3.038 ms 4 18.104.22.168 3.622 ms 4.832 ms 3.865 ms 5 22.214.171.124 13.528 ms 13.458 ms 13.654 ms 6 126.96.36.199 15.681 ms 17.251 ms 14.912 ms 7 188.8.131.52 13.926 ms 14.453 ms 16.609 ms 8 184.108.40.206 15.518 ms 14.52 ms 14.101 ms