Starting around CML 2.7, standard ISOs include IOL nodes (L3 router and L2/L3 switch) running IOS XE 17.12.01.

The specific portal you use to download your new Refplat ISO depends entirely on your licensing model: For CML-Personal & Personal Plus Users

). Verify your CML VM has enough storage allocated before upgrading, especially when including supplementary ISOs.

The Refplat ISO is the separate companion image that contains the exact software images and metadata profiles needed to spin up actual network devices. Without loading the Refplat ISO, your freshly deployed CML instance will be a framework with zero routers, switches, or firewalls available to boot.

Proper acquisition of the Cisco CML REFPLAT ISO requires a valid subscription and adherence to Cisco’s software distribution rules. This paper serves as an operational guide, not a bypass of licensing controls.

stands as the premier on-premises network simulation platform for network engineers, architects, and candidates tackling advanced certifications like the CCNA, CCNP, and CCIE. To run high-fidelity virtual network environments, the core platform requires an accompanying library of virtual operating systems. This collection is distributed via a crucial second download: the Reference Platforms (Refplat) ISO file .

: Click the Download button next to your order. This redirects you to the specific software portal.

From recent downloads (late 2025 to 2026), the RefPlat ISO files for CML follow a consistent naming convention that makes it easy to identify their purpose and age. A typical filename for the standard ISO is refplat-20241016-fcs.iso , and for the supplemental ISO, it's refplat-20240322-supplemental-iso.zip .