• How to connect an SSR device to MIST when DHCP is not available.
• How to configure a static IP on a new SSR device manually.

WAN Assurance Documentation provides options to onboard an SSR using static IP.

https://www.juniper.net/documentation/us/en/software/mist/mist-wan/topics/topic-map/ssr-onboarding-with-static-ip.html