GNS3

GNS3 1.3

Free
GNS3 is an open-source graphical network simulator
4.1  (75 votes)
4.4
2.0.3 (See all)

GNS3 is an open-source graphical network simulator that allows you to design complex network topologies. You may run simulations or configure devices ranging from simple workstations to powerful Cisco routers. It is based on Dynamips, Pemu/Qemu and Dynagen.

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