Cisco's Modeling Labs (CML) uses "IOSv Layer 2." These are modern, virtual switch images. They are the best, but they require a paid Cisco CML subscription (approx. $200/year).
: If you or your employer has a valid SmartNet service contract , you can download images directly from the Cisco website . cisco switch ios image download for gns3 install
Where to get Cisco IOS files for GNS3. - Spiceworks Community Cisco's Modeling Labs (CML) uses "IOSv Layer 2
For the best performance, images should be installed on the GNS3 Virtual Machine (VM) rather than locally on a Windows or Mac host. This provides a native Linux environment for the images to run, reducing CPU overhead. : If you or your employer has a
: If you have a Cisco account linked to an active support contract, you can download specific images for your hardware directly from the Cisco Software Download portal.