Asr1000-rommon.173-1r.spa.pkg |link| -

: ROMMON upgrades frequently resolve hardware-level vulnerabilities and improve secure boot processes.

: 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 asr1000-rommon.173-1r.spa.pkg

The firmware package is the ROM Monitor (ROMMON) image for the Cisco ASR 1000 Series Aggregation Services Routers . It is specifically used to upgrade the low-level boot code on hardware components like Route Processors (RP), Embedded Services Processors (ESP), and line cards (SPA Interface Processors). Why You Need This Upgrade Embedded Services Processors (ESP)