Cisco’s official demo images are distributed through:
GNS3 will automatically configure the correct RAM and CPU settings based on the appliance template. Initial Setup & Usage First Boot: You will be prompted to set an admin username and password on the first successful boot. Two-Stage Configuration: iosxrvk9demo613qcow2 top
If you have access to a Cisco IOS XR ISO, you can convert it to QCOW2 using qemu-img convert . Example: Cisco’s official demo images are distributed through: GNS3