: Always verify the SHA256 checksum from your trusted source (Cisco Software Download or authorized DEVNET portal) before deploying any production-facing virtual appliance.
Version 17.12.01 (Dublin) is a "Long-Lived Release," meaning it's generally more stable and intended for longer-term use in production-like testing compared to short-lived "feature" releases. cat9kv-prd-17.12.01prd9.qcow2
: Lack of CPU compatibility for the Icelake platform features required by IOS-XE 17.12. Fix : In your VM definition, set CPU type to host-passthrough (Linux KVM) or Intel Xeon E5 v3 (VMware). : Always verify the SHA256 checksum from your