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The England to Washington DC is interesting since VTrace, Maxmind and undns (orange line) give very different results for the target. Despite Sofia University advertising itself as being in Palo Alto the web server is actually near Washington DC. Also the route does not go from London to Paris as indicated by Maxmind.
| Melbourne to French Polynesia | Australia detail | W Coast US detail | undns and Vtrace agree |
|---|---|---|---|
Complementarity of VTrace and MaxMind
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| Melbourne to French Polynesia | TracerouteDetail for Australia | Detail of VTrace & undns at Melbourne | Detail of W. Coast US | Detail showing VTrace & undns at Seattle | Malaysia to French Polynesia | Japan to French Polynesia | |
|---|---|---|---|---|---|---|---|
 |  |  |  |  |  |  |  |
|  |  |
Maxmind gets the location of the host in French Polynesia. However the route in Australia and the US is badly off. Vtrace and undns agree for Australia and for hops in the US. VTrace does not work for French Polynesia since the underlying TULIP does not attempt to locate a host where the nearest Tier 0 landmark (SLAC) has > 60msec min_RTT. N.b. Australia's route to French Polynesia goes via the U.S. as does Malaysia's, and Japan's. The Japan traceoute is interesting in that undns shows the route as going via Chile. THis requires more investigation. The landmarks in China and Bolivia were unable to make traceroutes.
Miscellaneous
The traceroute from SLAC to UTM, Johor Bahru, Malaysia for MaxMind goes to central US, Japan, then via China and terminates in Sarawak. The VTrace goes from SLAC to Japan (undns confirms this), then to Kuala Lumpur Malaysia, then to Johor Bahru. It then takes an excursion to the Gulf of Thailand (hop 14) and appears to stop there (middle image below). On more detailed inspection (right hand image below), it is seen that it then returns to Johor Bahru and UTM (hops 15-16).
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