[better] - Asr1000-rommon.173-1r.spa.pkg

Understanding the Cisco ASR 1000 ROMMON Upgrade: asr1000-rommon.173-1r.spa.pkg

On the ASR 1000 platform, the architecture is unique because it separates the control plane (Route Processor) from the data plane (ESP - Embedded Service Processor). The ROMMON firmware is responsible for waking up these complex components, performing Power-On Self-Tests (POST), and locating the IOS-XE image to boot. asr1000-rommon.173-1r.spa.pkg

The filename follows the Cisco ASR 1000 naming convention, breaking down as follows: performing Power-On Self-Tests (POST)