As an open source project, you are free to view the source code and distribute this software application freely.

GNS3 2.2.25 is available to all software users as a free download for Windows. This download is licensed as freeware for the Windows (32-bit and 64-bit) operating system on a laptop or desktop PC from network auditing software without restrictions. GNS3 does not do that and you can run hundreds of devices in a GNS3 topology (assuming you have the hardware to do it). Other solutions like Cisco VIRL limit the number of devices in a topology to 20 Cisco devices (depends on license). You are only limited by the hardware resources you have available. GNS3 does not limit the number of devices you can run in a topology. It uses Dynamips emulation software to simulate Cisco IOS. GNS3 is a network software emulator that allows the combination of virtual and real devices, used to simulate complex networks its name is comes from Graphical Network Simulator. Network topology simulation software designed for professionals

Download cisco ios images gns3 free