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| Issue | Likely Cause | Solution | |-------|-------------|----------| | Node does not start in EVE‑NG | Incorrect folder name or missing virtioa.qcow2 rename | Verify the folder name starts with vios‑ and that the file is correctly named | | High CPU usage on idle router | Hypervisor not using hardware virtualization | Enable VT‑x/AMD‑V in BIOS and enable nested virtualization if running EVE‑NG in a VM | | Cannot find image in GNS3 appliance list | Image not associated with the appliance template | Re‑import the .gns3a template and manually specify the path to the QCOW2 file | | Permission denied when fixing permissions | Wrong user or insufficient privileges | Run fixpermissions as root from the EVE‑NG CLI | | The router boots but shows no interfaces | Incorrect QEMU model or interface mapping | For vIOS, use virtio‑net‑pci as the NIC model and ensure at least one interface is defined in the node configuration | viosadventerprisek9mspa1593m2qcow2 download exclusive
Upload the file into that folder and rename it strictly to virtioa.qcow2 . Purchase a subscription via the Cisco Learning Network Store