gns3 ☆
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Description:
GUI for the Dynamips Cisco router emulator
Type: Cask  |  Latest Version: 3.0.6@0  |  Tracked Since: Dec 28, 2025
Links: Homepage  |  @GNS3  |  formulae.brew.sh
Category: Networking
Tags: networking emulator cisco virtualization lab
Install: brew install --cask gns3
About:
GNS3 is a powerful network emulation platform that allows users to design, build, test, and troubleshoot complex virtual network topologies. It connects real and virtual devices, including Cisco routers, switches, and firewalls, providing a realistic simulation environment for hands-on learning and validation.
Key Features:
  • Graphical network designer for topology creation
  • Support for real device images (IOS, JunOS, ASA)
  • Integration with VirtualBox, QEMU, and Docker
  • Packet capture and traffic analysis tools
Use Cases:
  • Network engineer certification preparation (CCNA, CCNP)
  • Pre-deployment testing of network configurations
  • Protocol behavior analysis and troubleshooting
Alternatives:
  • EVE-NG – EVE-NG is a web-based alternative often favored for enterprise-scale labs, while GNS3 offers a more accessible desktop-centric interface.
  • Cisco Packet Tracer – Packet Tracer is a proprietary simulator for Cisco learning, whereas GNS3 uses real network operating systems for higher fidelity.
Version History
Detected Version Rev Change Commit
Jan 28, 2026 4:17pm 3.0.6 0 VERSION_BUMP 33629fe5
Aug 6, 2024 1:00pm 2.2.49 0 VERSION_BUMP ab7fd66e
Jul 12, 2024 6:51pm 2.2.48.1 0 VERSION_BUMP 7d43367b
Jul 11, 2024 9:10am 2.2.48 0 VERSION_BUMP 21c8a28f
Jul 8, 2024 6:41pm 2.2.48 0 VERSION_BUMP 1698c248
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