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

—the "soul" of the Cisco ASR1000 router. If this failed, the hardware wouldn't just crash; it would forget how to wake up. Silas took a breath and typed the command:

Thus, if you are upgrading from IOS-XE 16.6 to 17.3, you stage the ROMMON upgrade to 173-1r before loading the new IOS-XE image. asr1000-rommon.173-1r.spa.pkg

Before upgrading, always verify what you are running. Connect via console or SSH and use these commands: —the "soul" of the Cisco ASR1000 router