I understand you're looking for information about Cisco CML (Cisco Modeling Labs) and references to a "patched" refplat ISO download. Let me provide some clear and helpful guidance on this topic. Official Cisco CML Information Cisco CML (formerly VIRL) is a network simulation platform that allows you to model Cisco networks. The refplat (reference platform) ISO contains the official Cisco IOS, IOS-XE, NX-OS, and other device images needed to run nodes in CML. Official Access
Legitimate users with valid CML subscriptions can download the refplat ISO directly from Cisco Software Central or through the CML web interface Access requires a valid Cisco.com account with an entitlement to CML (Personal, Academic, or Enterprise editions)
Regarding "Patched" Versions I cannot and will not provide links, instructions, or support for:
Unofficial patched/cracked versions of Cisco CML Bypassing license checks or authentication Downloading refplat ISOs from unofficial sources cisco cml refplat iso download patched
Why this matters:
Legal risks – Unauthorized distribution violates Cisco's copyright and licensing terms Security risks – Unofficial patches may contain malware, backdoors, or vulnerabilities No support or updates – You miss critical security patches and bug fixes Ethical concerns – Circumventing licensing harms ongoing development
Legitimate Alternatives for Learning If you need Cisco network simulation but have budget constraints: I understand you're looking for information about Cisco
Cisco CML Personal – ~$199/year, includes essential images Cisco DevNet Sandbox – Free reservation-based CML access Cisco Packet Tracer – Free for beginners (limited features) EVE-NG Community Edition – Free, but you must provide your own legal Cisco images (from owned hardware or official trials)
If You Already Have a License If you're a licensed user looking for help with legitimate installation issues (e.g., patching a known bug with an official hotfix from Cisco), please:
Open a TAC case via Cisco Support Check the official CML community forums Review the official CML documentation for update procedures The refplat (reference platform) ISO contains the official
Bottom line: There is no legitimate "patched refplat ISO" for CML. If you see references to one online, it's almost certainly pirated software and using it carries significant legal and security risks. Pursue legal options instead.
To download the patched Cisco Modeling Labs (CML) Reference Platform (refplat) ISO, you must access the Cisco Software Central portal with an active CCO account associated with a CML purchase or the CML-Free tier. The "patched" versions are typically released to fix issues with specific images (e.g., the refplat-20201110-fcs.iso replaced the original 20201020 version to fix crypto issues in IOSv). 🛠️ Official Download Process Step 1: Log in to Cisco Software Download. Step 2: Search for "Modeling Labs" in the product sidebar. Step 3: Select the latest release version (e.g., CML 2.9 ). Step 4: Look for the "Reference Platform ISO" file. Standard ISO: Contains base images like IOSv, IOSvL2, and NX-OSv 9000. Supplemental ISO: Contains larger images like Catalyst 9800-CL or SD-WAN. Step 5: Download the file—note that it is often a .zip archive that must be extracted to get the .iso . 📂 Current Versioning (as of April 2026) Latest ISO: refplat-20241016-fcs.iso . Supplemental ISO: refplat-20241016-supplemental.iso . Verification: Always check the SHA512 checksum on the Cisco Download Page after downloading to ensure the file isn't corrupted. 🔄 How to Apply/Patch the ISO If you have already installed CML and need to swap to a newer "patched" ISO: CML 2.9 Release Notes - Cisco Modeling Labs v2.9