It is actively developed and supported and has a growing community of over 800,000 members. GNS3 is open source, free software that you can download from GNS3 allows you to run a small topology consisting of only a few devices on your laptop, to those that have many devices hosted on multiple servers or even hosted in the cloud. GNS3 is used by hundreds of thousands of network engineers worldwide to emulate, configure, test and troubleshoot virtual and real networks.
Configure GNS3 to use an additional remote server.How to use applications with the GNS3 Web interface.Install an appliance from the GNS3 Marketplace.
