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By default the topology gif file is placed in the current working directory with the name graph-<from>to<region<from>to<region|group|country>.gif. Where <from> is the value in the --from option, <region|group|country> is the value in teh the --region | --group or -country option. For example if called with:
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then the topology gif file has the name: graph-DRC-to-Africa.gif. If the --basepath option is specified then rather than placing the file in the current working directory it is placed in the directory specified by basepath. For example if called with:
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region_topology.pl --region Africa --detail country --endnodes on --tracerouteserver 'http://www.unikin.cd/cgi-bin/ traceroute.pl' --from 'DRC' --basepath '~cottrell/public_html'
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then the file will appear at ~cottrell/public_html/graph-DRC-to-Africa.gif
ProblemsProblems
Accurately locating the routers can be difficult. We use Geo IP Tool as the default. We also looked carefully at hostip.info, however it provides locations for fewer hosts and is not more accurate for our purposes. Both systems use databases and are not very complete/accurate for router interfaces. We are also developing TULIP to provide Geolocation using ping RTTs. It is a very valuable check on suspicious locations provided by the database methods. When we find the locations of hosts for which database methods provide the wrong countries, we provide a simple lookup table with the preferred countries.
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