The vios-adventerprisek9-m.spa.159-3.m6.qcow2 image is a specific version of the Cisco IOS, designed for virtual platforms. The naming convention provides crucial information about the image:
As of 2025, Cisco is transitioning to IOS XE in CML (e.g., csr1000v, iosv-xe). The Vios adventerprise series (classic IOSv) will be phased out by 2027. Version 15.9(3)M6 is likely one of the final maintenance releases. For new projects, prefer IOS XE virtual images. Download Vios-adventerprisek9-m.spa.159-3.m6.qcow2