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

: It can be applied collectively to Route Processors (RPs), Embedded Services Processors (ESPs), and SPA Interface Processors (SIPs) using the all keyword in the upgrade command.

One such file you will encounter when managing the ASR 1000 Series (including ASR1001-X, ASR1002-X, ASR1004, ASR1006, and ASR1009) is: asr1000-rommon.173-1r.spa.pkg

Router# verify /md5 bootflash:asr1000-rommon.173-1r.spa.pkg : It can be applied collectively to Route

While the upgrade process involves risk, the benefits—improved boot times, security patches, and compatibility with new hardware and software features—far outweigh the downsides, provided you follow Cisco’s guidelines and maintain proper out-of-band console access. Embedded Services Processors (ESPs)