Asr1000-rommon.173-1r.spa.pkg Here

: Upgrading to modern Cisco IOS XE 17.x releases often requires a minimum ROMMON version to ensure hardware stability and boot functionality.

: ROMMON upgrades frequently resolve hardware-level vulnerabilities and improve secure boot processes. asr1000-rommon.173-1r.spa.pkg

: Multi-slot chassis require a Cisco Hard Disk Drive (HDD) to be present in the Route Processor for a successful upgrade. Step-by-Step Upgrade Procedure : Upgrading to modern Cisco IOS XE 17