.. include:: replace.txt Topology Input Readers ---------------------- The topology modules aim at reading a topology file generated by an automatic topology generator. The process is divided in two steps: - running a topology generator to build a topology file - reading the topology file and build a ns-3 simulation Hence, model is focused on being able to read correctly the various topology formats. Currently there are three models: * ``ns3::OrbisTopologyReader`` for Orbis_ 0.7 traces * ``ns3::InetTopologyReader`` for Inet_ 3.0 traces * ``ns3::RocketfuelTopologyReader`` for Rocketfuel_ traces An helper ``ns3::TopologyReaderHelper`` is provided to assist on trivial tasks. A good source for topology data is also Archipelago_. The current Archipelago Measurements_, monthly updated, are stored in the CAIDA website using a complete notation and triple data source, one for each working group. A different and more compact notation reporting only the AS-relationships (a sort of more Orbis-like format) is here: as-relationships_. The compact notation can be easily stripped down to a pure Orbis format, just removing the double relationships (the compact format use one-way links, while Orbis use two-way links) and pruning the 3rd parameter. Note that with the compact data Orbis can then be used create a rescaled version of the topology, thus being the most effective way (to my best knowledge) to make an internet-like topology. Examples can be found in the directory ``src/topology-read/examples/`` .. _Orbis: http://sysnet.ucsd.edu/~pmahadevan/topo_research/topo.html .. _Inet: http://topology.eecs.umich.edu/inet/ .. _RocketFuel: http://www.cs.washington.edu/research/networking/rocketfuel/ .. _Archipelago: http://www.caida.org/projects/ark/ .. _Measurements: http://data.caida.org/datasets/topology/ipv4.allpref24-aslinks/ .. _as-relationships: http://www.caida.org/data/active/as-relationships/index.xml