R+Svms are all vendor Routing and Switching images that are larger in size but can be imported into GNS3 for real world network emulation.ĭue to these platforms hitting End of Sale, End of Life, and End of Support status, the images are no longer available for download from Cisco’s support sections.IOS images are lower in cpu and memory so you can fit more of them in one topology.IOS images are usually run in Dynamips however R+Svms are housed in a virtual machine.What are the differences? Here are the major differences: These are classified as Routing and Switching virtual machines (or R+Svms) for short. In the new GNS3 1.4, there is a way to run a second category of switches and routers. For older images, we use and maintain Dynamips an emulator dedicated to emulate some Cisco hardware.

GNS3 offers multiple ways to emulate IOS.