The SIM card is inserted and detected properly but returns configuration errors when the interface (cl-0/0/0) is added into the configuration for the site.
Hardware detection:
# ls /sys/bus/usb/drivers/qmi_wwan/*/net/
wwp0s21u1i8
Using variables:
“1: Error: cl-0/0/0 is not a valid interface on this device”
{{LTE_NAME}}
{{LTE_DESR}}
{{LTE_INTERFACE}}
Entered directly as described in Configure WAN Edge Templates for Session Smart Routers:
cl-0/0/0 (Error: cl-0/0/0 is not a valid interface on this device)
cl-1/0/0 (Error: cl-1/0/0 is not a valid interface on this device)
wwp0s21u1i8 (Not a valid interface for MIST)
Change the interface name from cl-0/0/0 to lte-0/0/0.
There is a documentation defect opened to have this addressed.
https://docs.128technology.com/docs/howto_lte/
https://www.juniper.net/documentation/us/en/software/mist/mist-wan/topics/task/influence-path-selection-from-hub-to-spoke.html#task_od3_slq_nbc