CentOS 7 with Docker

if you are trying to monitor the juniper via snmp you can/should try to create your own template via using mib2zabbix. I've used it for some switches a couple years ago and it worked well. Its worthwhile to note however that while this works well it will create specific zabbix items for oids and not use zabbix snmp style LLD to walk through snmp tables and discover all the values. This can mean depending on the model of switch you may need to add additional items for additional interfaces from one model switch to the other. https://sbcode.net/zabbix/mib-to-zabbix-template/

You could also try adding your snmp lld discovery rule as described in the official manual, it works very well as well https://www.zabbix.com/documentation/4.2/manual/discovery/low_level_discovery/snmp_oids. The benefit here is you can have one SNMP LLD per snmp Table provided by the mib tree/oid instead of a 1-to-1 for every individual oid. In practice this means for example ALL your switch/router interfaces from 1 to 54 or 52 or 100 or N get discovered.

If you haven't custom LLDs yet, you will soon likely realize how powerful LLDs are in zabbix.

Hello, integration was created juniper_mx_snmp here.

Also you might be interested in Juniper MX Series by NETCONF 

Closing this ticket.

BR