As an open source project, you are free to view the source code and distribute this software application freely. It's subscription-based at US199/year (US79/year for academic use) and has many of the same capabilities as the CML product. Please DO NOT ask for images that I am unable to provide. However, the legality of the source of Cisco images for GNS3 is questionable. One key advantage that Cisco IOU has is that it does not require nearly as much resources as GNS3 and VIRL would require. I can only show you LEGAL ways of doing this. IOU was built as a native Solaris image and runs just like any other program.

GNS3 2.2.25 is available to all software users as a free download for Windows. VIRL is now available to download at the URL I mentioned earlier. In this video I show you how to download Cisco IOS images and Cisco VIRL images to run IOSv, IOSvL2 and ASAv. 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. Its subscription-based at US199/year (US79/year for academic use) and has many of the same capabilities as the CML product. GNS3 does not do that and you can run hundreds of devices in a GNS3 topology (assuming you have the hardware to do it). VIRL is now available to download at the URL I mentioned earlier. Other solutions like Cisco VIRL limit the number of devices in a topology to 20 Cisco devices (depends on license). Certifications Help About Us.Whelton Network Solutions is an IT service provider. Thanks for the replies, Ive managed to get an image. One of the first steps you need to take before you can get gns3 up and running is dowload ios images for gns3. There have been reports of compromised IOS images making the rounds. The VIRL/CML images are now considered by cisco to be the best images to use in gns3. You are only limited by the hardware resources you have available. The gns3 virl image downloads are in the download section of your account on the cisco learning network store. 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

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