Cisco Modeling Labs (CML) relies on a to provide the virtual machine images—such as IOSv, NX-OSv, and ASAv—required to run network simulations. For users seeking a "patched" or most up-to-date version, it is essential to understand that Cisco typically releases cumulative ISO updates rather than individual patches for the ISO itself. Official Sources for CML Refplat ISO Downloads
Under the section, select your newly uploaded patched ISO from the dropdown menu. Click Save or Mount .
Without this ISO, you cannot start any meaningful network simulation. The system will display "CL Nodes Do Not Show Up" or simply have no devices available in the design panel, because the core images required to power those devices are missing.
If running CML natively on Linux, copy the patched ISO directly to your configured storage pool path (typically /var/lib/libvirt/images/ ) and update your domain XML definition to link the virtual CD-ROM drive to your newly generated image. 5. Verifying the Patched Nodes inside CML Cockpit cisco cml refplat iso download patched
Cisco periodically releases updated refplat ISOs. These "patched" versions are crucial because they contain: Security Patches: Fixed vulnerabilities in OS images.
"Come on," he whispered, watching the console logs scroll by in a blur of white text on a black background.
Navigate to the extracted directory to make modifications. The node images live within a specific subdirectory structure (typically under virl-base-images/ ): cd /tmp/cml_patched/virl-base-images/ Use code with caution. Cisco Modeling Labs (CML) relies on a to
Instead of sourcing unofficial files, you can modify, update, and patch your existing Refplat image set directly using built-in, officially supported tools. 1. Leverage the Cisco Software Central Portal
A standard, vanilla Refplat ISO includes a snapshot of standard node images available at the time of that CML version's release. However, network engineers frequently need a "patched" or modified setup for several key reasons:
CML caches older images if the node definition versions match exactly. Clear the node cache in the CML UI under Maintenance or change the version string in the node definition file before compiling the ISO. Click Save or Mount
: Newer CML server versions (e.g., 2.8 or 2.9) often come with a refreshed base ISO that includes the latest software fixes for the virtual images. How to Apply the Latest Refplat to Your CML Instance CML Installation Guide - Cisco Modeling Labs v2.9
Navigate to the images folder inside your workspace. Paste your updated or patched .qcow2 image files into the corresponding node directories.
Access to a Linux machine (Ubuntu or CentOS preferred) or Windows Subsystem for Linux (WSL) to run the creation scripts.