GNS3 icon
GNS3 icon

GNS3

 46 likes

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

Main screen

License model

  • Free • Open Source

Application type

Country of Origin

  • US flagUnited States

Platforms

  • Mac
  • Windows
  • Linux
GNS3 screenshot 1
GNS3 alternatives  
4.5 / 5 Avg rating (2)
46likes
1comment
8alternatives
0news articles

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Properties

  1.  Educational
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 Tags

  • cisco
  • juniper
  • virtualbox

GNS3 News & Activities

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Recent activities

  • mihaibob liked GNS3
    •5 months ago
  • POX added GNS3 as alternative to MaSSHandra
    •8 months ago
  • dredev216, drizzlysizzly and Ethan-Looper liked GNS3
    •10 months ago
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GNS3 information

AlternativeTo Categories

Network & Admin, Education & Reference

GitHub repository

  •  2,336 Stars
  •  445 Forks
  •  148 Open Issues
  •   Updated Apr 21, 2025 
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Our users have written 1 comments and reviews about GNS3, and it has gotten 46 likes

GNS3 was added to AlternativeTo by deranjer on Nov 16, 2011 and this page was last updated Feb 13, 2023.

Comments and Reviews

   
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Top Positive Comment
aviallon
★
★
★
★
★
•May 10, 2021
0

Opensource, much easier to setup and package than Packet Tracer. Better support for Linux overall

What is GNS3?

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

To provide complete and accurate simulations, GNS3 is strongly linked with:

Dynamips, a Cisco IOS emulator. Qemu, a generic and open source machine emulator and virtualizer. VirtualBox, a free and powerful virtualization software. GNS3 is an excellent complementary tool to real labs for network engineers, administrators and people wanting to study for certifications such as Cisco CCNA, CCNP, CCIP and CCIE as well as Juniper JNCIA, JNCIS and JNCIE.

It can also be used to experiment features of Cisco IOS, Juniper JunOS or to check configurations that need to be deployed later on real routers.

Thanks to VirtualBox integration, now even system engineers and administrators can take advantage of GNS3 to study Redhat (RHCE, RHCT), Microsoft (MSCE, MSCA), Novell (CLP) and many other vendor certifications.

This project is an open source, free program that may be used on multiple operating systems, including Windows, Linux, and MacOS X.

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