A real world example of using countertrace to project the illusion
of three imaginary hops, each introducing 10ms of latency.  First,
a traceroute without countertrace running, to establish a baseline:

   [mct@unix5 ~]$ traceroute antarctica.netisland.net
   traceroute to antarctica.netisland.net (207.106.130.88), 30 hops max
    1  207.8.186.254 (207.8.186.254)  2 ms  2 ms  2 ms
    2  core1-int-gige-1.cnsh.phl.netaxs.net (207.106.32.13)  3 ms  6 ms  4 ms
    3  core1-sdfc-gige-1.sdfc.phl.netaxs.net (207.106.0.9)  4 ms  4 ms  6 ms
    4  core1-mfn3-oc3.mfn3.phl.netaxs.net (207.106.2.126)  5 ms  4 ms  4 ms
    5  core1-main1-100M.mfn3.phl.netaxs.com (207.106.127.177)  5 ms  3 ms  5 ms
    6  mct-too-r.netaxs.net (207.106.3.254)  11 ms  10 ms  12 ms
    7  antarctica.netisland.net (207.106.130.88)  10 ms  12 ms  11 ms

Second, a traceroute from the same source, after starting countertrace
on the target with the "example-hops-configuration" configuration file:

   [mct@unix5 ~]$ traceroute antarctica.netisland.net
   traceroute to antarctica.netisland.net (207.106.130.88), 30 hops max
    1  207.8.186.254 (207.8.186.254)  2 ms  2 ms  2 ms
    2  core1-int-gige-1.cnsh.phl.netaxs.net (207.106.32.13)  6 ms  4 ms  4 ms
    3  core1-sdfc-gige-1.sdfc.phl.netaxs.net (207.106.0.9)  4 ms  4 ms  5 ms
    4  core1-mfn3-oc3.mfn3.phl.netaxs.net (207.106.2.126)  4 ms  6 ms  4 ms
    5  core1-main1-100M.mfn3.phl.netaxs.com (207.106.127.177)  6 ms  7 ms  4 ms
    6  mct-too-r.netaxs.net (207.106.3.254)  10 ms  10 ms  12 ms
    7  10.1.1.1 (10.1.1.1)  26 ms  22 ms  20 ms
    8  10.2.2.2 (10.2.2.2)  34 ms  33 ms  37 ms
    9  10.3.3.3 (10.3.3.3)  39 ms  46 ms  46 ms
   10  antarctica.netisland.net (207.106.130.88)  50 ms  45 ms  40 ms

Finally, the information logged by countertrace as a result of the second
traceroute:

   Queueing fake time-exceeded to 207.8.186.7, ttl  1, UDP, 58335 -> 33453
   Queueing fake time-exceeded to 207.8.186.7, ttl  1, UDP, 58335 -> 33454
   Queueing fake time-exceeded to 207.8.186.7, ttl  1, UDP, 58335 -> 33455
   Queueing fake time-exceeded to 207.8.186.7, ttl  2, UDP, 58335 -> 33456
   Queueing fake time-exceeded to 207.8.186.7, ttl  2, UDP, 58335 -> 33457
   Queueing fake time-exceeded to 207.8.186.7, ttl  2, UDP, 58335 -> 33458
   Queueing fake time-exceeded to 207.8.186.7, ttl  3, UDP, 58335 -> 33459
   Queueing fake time-exceeded to 207.8.186.7, ttl  3, UDP, 58335 -> 33460
   Queueing fake time-exceeded to 207.8.186.7, ttl  3, UDP, 58335 -> 33461

-mct, Mon Jul 29 01:59:22 EDT 2002