: For those with a service contract, specific legacy images like the c7200 series (which supports IOS 15.x) may still be available via the Cisco Software Download Cisco Community Image Recommendations for GNS3
Once you have the image file, follow these steps to add it to your environment: Open GNS3 and go to Edit > Preferences For Dynamips (Legacy) : Navigate to IOS Routers > New and browse for your image file. For CML/VIRL Images : Navigate to Qemu VMs > New or use the GNS3 Marketplace templates for a guided import. download cisco ios image for gns3
While GNS3 supports many older images via the Dynamips emulator, most are now End-of-Life (EoL). The following are commonly used for CCNA/CCNP labs: GNS3 Documentation Image Type Recommended Model Emulator in GNS3 Router (Modern) Qemu / GNS3 VM Switch (Modern) Qemu / GNS3 VM Router (Legacy) 7200 (c7200-adventerprisek9-mz.152-4.M7.bin) Qemu / GNS3 VM How to Import into GNS3 : For those with a service contract, specific