Cisco VM images included in the Refplat bundle are strictly licensed for use inside an authorized CML instance . Hosting, distributing, or utilizing cracked variants violates the Cisco End User License Agreement (EULA).
Cisco Modeling Labs (CML) uses Reference Platform (Refplat) ISO files to provide the virtual machine images (e.g., IOSv, NX-OSv, ASA) needed to run simulations
for installation. For a detailed guide on copying the ISO, visit Cisco Developer Network Copy Refplat ISO to Disk - Cisco Modeling Labs v2.9
Finding the latest, stable, and refplat ISO is crucial for ensuring security, accessing new features, and avoiding known bugs. This article provides a comprehensive guide on how to download, manage, and patch the CML Reference Platform ISO in 2026. What is the CML Refplat ISO? cisco cml refplat iso download patched
CML is paid software. It requires a valid license (Smart License via Cisco DNA Center or an on-premises license file). Some enterprising individuals release "patched" ISOs or Python scripts that modify the CML source code ( /usr/local/cml/... ) to disable license checks. Using these is a direct violation of Cisco's EULA (End User License Agreement). Cisco actively detects these via telemetry, and your access to software updates via Cisco.com will be revoked if caught.
Cisco’s official support channels, including TAC (Technical Assistance Center), will refuse to support an installation that uses a patched or cracked license. If your CML VM crashes, nodes fail to boot, or a complex topology refuses to converge, you will be entirely alone in troubleshooting. No official patches, bug fixes, or updates will be available to you, leaving you stuck in a potentially broken state.
If you need temporary access to a full CML environment without installing anything, Cisco offers free CML sandboxes via the DevNet portal. This is an excellent way to use the full version for a limited period for specific development or testing tasks. Cisco VM images included in the Refplat bundle
Once you have generated your cml_refplat_patched.iso , you must introduce it to your CML controller cluster or standalone VM. Via CML Cockpit (Admin Interface)
This method avoids the "refplat" and "patching" headache entirely while remaining 100% legal and stable.
xorriso -as mkisofs \ -V "CML_REFPLAT_PATCHED" \ -o ~/patched-cml-refplat.iso \ -J -R -v /tmp/cml_iso_workspace/ Use code with caution. For a detailed guide on copying the ISO,
This content is for educational purposes only. Downloading, modifying, or distributing patched Cisco software violates Cisco’s End User License Agreement (EULA) and applicable copyright laws. Always use official, licensed images. I do not host, link to, or condone the use of cracked software.
Official RefPlat ISO filenames follow a specific structure: (e.g., refplat-20241016-fcs.iso ) or refplat-YYYYMMDD-supplemental-iso.zip for extended images like SD-WAN and Firepower. There is also a "Personal" branded version that uses refplat_p-YYYYMMDD-fcs-iso.zip .