The primary function of this package is to update the boot code on various hardware components within the ASR 1000 chassis, including: : Such as the RP2 and RP3.
Next time you log into your ASR 1000, run show rom-monitor . If the version does not read 173-1r , plan your upgrade window today. asr1000-rommon.173-1r.spa.pkg
Router# show platform