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If the location of all the routers in the requested vtrace are cached then it takes only about 10 secs to give the output.
Working Specifics
A subset of the Maxmind city database is used to find the nearest city to each router, only cities with population greater than 100,000 are considered.
- The database used is /nfs/slac/g/net/pinger/tulip/citidb.txt
Both PingER and PerfSONAR landmarks can be used as the traceroute source
- List of possible PingER landmarks is /nfs/slac/g/net/pinger/tulip/pinger_vtrace.txt
- List of possible PerfSONAR landmarks is /nfs/slac/g/net/pinger/tulip/psonar_vtrace.txt
- or simply see http://www-wanmon.slac.stanford.edu/cgi-wrap/reflector.cgi?PE=set&PSE=set&function=landmarks
Visual Traceroute can be called directly from URL. The format is:
- http://www-wanmon.slac.stanford.edu/cgi-bin/reflector.cgi?function=vtrace&from=Landmark_HostName&target=target_IP_or_HostName
- for Landmark_HostName see http://www-wanmon.slac.stanford.edu/cgi-wrap/reflector.cgi?function=landmarks in some cases the HostName is the same as IP
Design
The tabular traceroute is shown together with the Autonomous System Number (ASN), if known, and router's location coordinates. Clicking on the IP address will take you to the TULIP geolocation utility. Clicking on the ASN will provide information on the ASN.
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