Specifically, this is the (Layer 3 Virtual IOS) image, version 15.9(3)M6 , in QCOW2 format, which is compatible with QEMU/KVM environments like GNS3, EVE-NG, and PNETLab. Understanding the vIOS Image
This file is a virtual Cisco router image typically used in network simulation labs like , EVE-NG , or Cisco Modeling Labs (CML) . Because this is proprietary, licensed software, it is not legally available for public "free" download from unofficial sources. download viosadventerprisek9mspa1593m6qcow2 verified
If you need this image for legitimate purposes (e.g., lab testing, network simulation), I recommend: Specifically, this is the (Layer 3 Virtual IOS)