is the essential "treasure chest" containing the virtual machine images (IOS, IOS-XE, ASA, etc.) required to run labs. While there is no official "patched" ISO provided by Cisco, the community often uses this term to describe two specific scenarios: the manual addition of supplemental images or the fixing of corrupted/incomplete installations The Anatomy of the "Refplat"
Downloading Files for CML Installation - Cisco Modeling Labs v2.9
If your hardware is giving you trouble with the REFPLAT ISO, do not patch it. Use the version.
, ensuring you rename the files as needed to avoid overwriting existing core images. Why You Shouldn't Use Unofficial "Patches"