: The safest and most stable images come directly from vendors like Cisco (CML/VIRL) Community Repositories : Sites like GitHub (hegdepavankumar)
EVE-NG (Emulated Virtual Environment – Next Generation) is a powerhouse for network simulation. But anyone who’s built labs knows the bottleneck: . Slow downloads, broken links, version mismatches, and manual import errors can derail your lab setup for hours. This guide provides a “better” approach to sourcing, verifying, and managing QEMU images for EVE-NG.
Fortinet allows users to download free trial KVM/QEMU images (.qcow2) for FortiGate firewalls directly from their support portal.
EVE-NG uses a strict naming convention to recognize images. If you do not follow this, the image will not work. vendor-version.qcow2 Example (Cisco ASA): asav-9.15.1.qcow2 Example (Fortigate): fortigate-7.2.0.qcow2 B. Renaming and Permissions (CLI)
Emulated Virtual Environment Next Generation (EVE-NG) is the premier platform for network engineers to build complex topologies. However, because QEMU images ( .qcow2 ) for Cisco, Palo Alto, and Fortinet can exceed several gigabytes, standard browser downloads frequently fail, corrupt, or throttle your bandwidth.
If the checksum matches but the image still does not work, the problem is likely not corruption but a . Double‑check the exact version of EVE‑NG you are using (community edition vs. professional) and consult the image’s readme. Some images require a specific EVE‑NG version. Newer Cisco IOS‑XE images, for instance, may require EVE‑NG Pro features.
: After every new upload or change, run the built-in script to prevent boot failures: /opt/unetlab/wrappers/unl_wrapper -a fixpermissions 3. Performance & Management Tuning To make the downloaded images run better once installed: Linux images - - EVE-NG
: The safest and most stable images come directly from vendors like Cisco (CML/VIRL) Community Repositories : Sites like GitHub (hegdepavankumar)
EVE-NG (Emulated Virtual Environment – Next Generation) is a powerhouse for network simulation. But anyone who’s built labs knows the bottleneck: . Slow downloads, broken links, version mismatches, and manual import errors can derail your lab setup for hours. This guide provides a “better” approach to sourcing, verifying, and managing QEMU images for EVE-NG.
Fortinet allows users to download free trial KVM/QEMU images (.qcow2) for FortiGate firewalls directly from their support portal.
EVE-NG uses a strict naming convention to recognize images. If you do not follow this, the image will not work. vendor-version.qcow2 Example (Cisco ASA): asav-9.15.1.qcow2 Example (Fortigate): fortigate-7.2.0.qcow2 B. Renaming and Permissions (CLI)
Emulated Virtual Environment Next Generation (EVE-NG) is the premier platform for network engineers to build complex topologies. However, because QEMU images ( .qcow2 ) for Cisco, Palo Alto, and Fortinet can exceed several gigabytes, standard browser downloads frequently fail, corrupt, or throttle your bandwidth.
If the checksum matches but the image still does not work, the problem is likely not corruption but a . Double‑check the exact version of EVE‑NG you are using (community edition vs. professional) and consult the image’s readme. Some images require a specific EVE‑NG version. Newer Cisco IOS‑XE images, for instance, may require EVE‑NG Pro features.
: After every new upload or change, run the built-in script to prevent boot failures: /opt/unetlab/wrappers/unl_wrapper -a fixpermissions 3. Performance & Management Tuning To make the downloaded images run better once installed: Linux images - - EVE-NG
