Upgraded ASR1002 with asr1000-rommon-155-3r.S1.pkg and asr1000rp1-adventerprisek9.03.16.01a.S.155-3.S1a-ext.bin.
Performed a show rom-monitor 0 to verify that asr1000-rommon-155-3r.S1.pkg was successful.
got "System Bootstrap, Version 15.5(3r)S1, ...