Select the downloaded template. GNS3 will show you the exact filename and version it expects. Provide the Image : Point the wizard to your legally obtained License (for IOU) : If using IOU images, you must add your license key under Edit > Preferences > IOS on Unix to avoid "could not parse iourc" errors. Cisco Community specifically for a VLAN lab? Understanding GNS3 Device Images: Routers and Switches
Call it Catalogue Switch vIOS-L2 or Cisco IOSvL2 15.2 . Click Next . cisco switch ios image download for gns3
Within minutes, you have a library of 10+ legal, perfect switch images. Select the downloaded template
If you choose this path, always scan files for malware and run them in an isolated lab. Cisco Community specifically for a VLAN lab
These are the only stable "Dynamips" images. To do switching on these, you must add the NM-16ESW 16-port switch module in the GNS3 configuration. How to Install the Image in GNS3