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GNS3 is a graphical network simulator that allows simulation of complex networks.

To allow complete simulations, GNS3 is strongly linked with:

  • Dynamips, the core program that allows Cisco IOS emulation
  • Dynagen, a text-based front-end for Dynamips
  • Qemu, a generic and open source machine emulator and virtualizer
  • GNS3 is an excellent complementary tool to real labs for network engineers, administrators and people wanting to pass certifications such as CCNA, CCNP, CCIP, CCIE, JNCIA, JNCIS, JNCIE
  • Design of high quality and complex network

What's New

Version 1.4.6:

Note: Now requires OS X 10.9 or later running on a 64-bit Intel processor

  • Release notes were unavailable when this listing was updated.


  • OS X 10.9 or later

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Current Version (1.x)


Downloads 5,081
Version Downloads 682
License Free
Date 23 May 2016
Platform Intel 64 / OS X
Price Free
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