Symptom
ISR4431 changes config-register value unexpectedly after a reload to 0x101.
E.g.
ISR4431 uptime is 1 week, 5 days, 4 hours, 2 minutes
System returned to ROM by PowerOn
System image file is "bootflash:isr4400-universalk9.16.08.02.SPA.bin"
Last reload reason: PowerOn
Configuration register is 0x101
Conditions
IOS upgrade from 16.x to 16.12.x
E.g.
boot system bootflash:isr4400-universalk9.16.12.01a.SPA.bin
wr mem
reload
