Before attempting to download, ensure you have the following:
Cisco Modeling Labs (CML) remains the industry standard for network engineers, architects, and students needing to simulate complex network topologies. At the heart of CML’s capability—especially for the latest releases in 2026—is the (Reference Platform ISO).
"Failed: Error importing topology file: Node n0 R1 definition iosv not found" or similar node not found errors when trying to start a lab.
portal. CML-Personal users can access their specific downloads through the Cisco Learning Network Store under "My Account". Application cisco cml refplat iso download new
Once the copy is complete, you can safely unmount the ISO from your VMware settings to free up virtual hardware resources. Troubleshooting Common Download and Setup Issues
Click the button and allow the process to finish. This may take 15–30 minutes depending on your storage speed (SSD vs. HDD).
Look for the latest date (e.g., refplat-2026...fcs-iso.zip ). Before attempting to download, ensure you have the
Cisco CML Refplat ISO Download: Everything You Need to Know for Your Lab
: A large, secondary image storage file containing the operating system software images (nodes) that run inside your labs.
By dawn, the simulation hit a snag. A loop. In the real world, this would have crashed the bank's entire Eastern seaboard branch. Here, it was just a red flickering icon. Elias smiled, leaned back, and sipped cold coffee. He had found the ghost in the machine before it could ever haunt the living. The download was complete, but his work was just beginning. portal
Below is a complete guide on how to securely download, verify, and install the Refplat ISO for a "new" CML deployment.
Ensure your CML host has at least 50GB of free space before attempting the download and extraction. The ISO stays mounted, so it consumes storage permanently.
Once you have downloaded the large .iso file (often exceeding 30GB), you need to mount it to your CML virtual machine. For VMware ESXi/Workstation: Upload the ISO to your datastore or local folder. Edit the CML VM settings. Select the CD/DVD drive and "Connect at Power On." Path the drive to your new RefPlat ISO. For Bare Metal: