Question: do i need gns3 vm?
Answer: The GNS3 VM is recommended for most situations when you are using Windows or Mac OS. ... However, if you only want to create basic GNS3 topologies using Cisco IOS routers, a local (Dynamips) install will suffice. This means that you only install the GNS3 GUI (all-in-one) and don't use the GNS3 VM.