What are the ways to find out the SNMP OID for devices?

Question

linux

Comrades, good afternoon.
I am using zabbix monitoring system. Everything is already installed, configured and it's time to add devices via SNMP protocol.
Everything works, but there was such a problem that for some devices I can’t find either the SNMP OIDs themselves or descriptions for them. It is clear that under cisco and the like iron is much easier, but in cases with other iron, what would you advise?
PS I've already gone through the documentation, nothing about MIB databases.
Currently looking for an OID for "junger"

Answer 1

what is jungler?
all standard oids are repeated, only the last index differs, depending on the interface. and private ones are usually in MIBs

Answer 2

run the snmpvolk and analyze what your jungler gives you if there are no ready-made mibs and descriptions.

Answer 3

Not all hardware gives MIB / OID using snmpwalk.
Therefore, take the source and go:
Juniper MIBs