Consider GNS3, EVE-NG, or Cisco CML (for advanced users).
, as it is proprietary software owned by Cisco. While some developers host installation scripts or old binaries on GitHub, the most secure and up-to-date way to get it is through the official Cisco Networking Academy 1. Official Download Method (Recommended)
Leo’s heart rate slowed. He wasn't looking for a hack; he was looking for efficiency. If this script worked, he could define his twenty-node network in a text file, generate the topology, and open it in the official software just to verify connectivity. It bypassed the hours of dragging icons and connecting cables one by one.
"Thanks for the tool. It saved my final project. Fixed an IPv6 mask issue in this PR."