images (e.g., Cisco 7200, 3725) that run via emulation. These are resource-intensive and increasingly rare. Cisco IOL (IOS on Linux): Lightweight images often found in the refplat.iso How to Add the Image to GNS3 Once you have the file, follow these steps to use it: Open GNS3 and go to Edit > Preferences IOS Routers (for Dynamips) or (for IOSv/CML images). to select your downloaded image file.
The most common and recommended way to get modern, legal images (like IOSv, IOSv-L2, and ASAv) is by purchasing a personal license for Cisco Modeling Labs (CML) Cisco Software Central: download cisco ios image file for gns3
, so I can recommend the best image versions for those labs? images (e
Follow the wizard to set the RAM and Slot requirements, then click Further Exploration Learn how to set up Cisco Modeling Labs (CML) to legally access the latest networking images. GNS3 Documentation for a step-by-step guide on importing legacy router images. Explore the differences between Dynamips and QEMU to select your downloaded image file
on the GNS3 Community forum to choose the right image type for your PC's performance.
You can extract IOS images from physical Cisco routers you already own by copying the file from the device's flash memory to a TFTP server. Supported Image Types in GNS3
If you have an active service contract (SmartNet) for specific hardware, you can download files directly from the Cisco Software Download Physical Hardware: