Post-upgrade verification (compact):

isn't just data—it’s the "holy grail" for a tired admin trying to breathe life into an aging Cisco Catalyst 3560 switch. The Ghost in the Rack

Do deploy this image on a production network connected to the internet. If you absolutely need IOS 15 for a lab or air-gapped network, and you have a legal right to the file (via prior purchase or contract), download directly from Cisco.

Since you asked to "make a feature," here is a breakdown of the features included in this specific filename so you can verify if it meets your needs before downloading.