standard Cisco 2960 IOS images are not natively compatible with the GNS3 Dynamips emulator
If you own a physical 2960 switch, you can extract the .bin file from its flash memory, though these older "real" images often struggle to run purely in GNS3 without an IOU (IOS on Unix) wrapper. cisco 2960 switch ios download for gns3
: You cannot run an actual 2960 IOS in GNS3. Use IOU L2 images , Packet Tracer , or vIOS L2 instead. For legal, safe learning, purchase a CML subscription or use Cisco’s DevNet Sandbox. standard Cisco 2960 IOS images are not natively
interface gigabitethernet0/2 switchport mode trunk no shutdown exit or vIOS L2 instead. For legal