https://www.juniper.net/documentation/en_US/junos/topics/concept/security-autoinstallation-overview.html
https://www.juniper.net/documentation/en_US/junos/topics/topic-map/security-zero-touch-provisioning.html
Junos OS Release 15.1X49-D100 or greater
ZTP and CSO integration, then D120 is a must
