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How To Setup GNS3 on a Windows 7 Computer

In this guide we are going to setup GNS3 on a computer running Windows 7.  GNS3 is a free network simulator that can simulate network hardware from vendors such as Cisco, Juniper and Arista etc. It is also an excellent tool for those who are studying for network certifications such as CCNA, CCNP and CCIE.

This what the developers of GNS3 claims:

Real-time network simulation for pre-deployment testing without the need for network hardware
Run the OS that emulates real behavior of network hardware

Test 20+ different network vendors in risk-free virtual environment
Quickly run and test multiple hardware vendors without the need for hardware

Create dynamic network maps for troubleshooting and proof of concept (POC) testing
Test your networks before you build them to reduce the time it takes to get a production network up and running

Connect GNS3 to any real network
Leverage your existing hardware and expand your current lab by connecting your GNS3 topologies directly to it

Customized topologies and labs within GNS3 for network certification training
GNS3 is the best study tool for aspiring network professional seeking their certifications, without the need for a home lab.


You will need the following:

  1. GNS3 software downloaded from
  2. Cisco IOS such as the c3725-adventerprisek9-mz124-15.bin or c7200-advipservicesk9-mz.152-4.S5.bin. You can find these on the web very easily or download from the Cisco website


Step 1 Download

The simplest way to install GNS3 on Windows is to use the “all-in-one” installer that can be downloaded from download section.

Click here to download the GNS3 software.

Figure GNS3 install guides and download options

Step 2 Installation

Locate the file you downloaded and double-click on it to begin the installation. Afterwards it is just a matter of clicking on next button if you don’t want to customize your installation.

Please see the video demonstration!




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