To see what SNMP types are configured by default go to Configuration -> Management -> required policy
Navigate to tab SNMP and confirm required server managers (v1, v2c or v3) are enabled and confirm v1 / v2c community strings needed. For SNMPv3 please check configured users and its passwords / protection.
Perform required changes, click OK and Commit and Save
To see SNMP trap generator and receivers setup, navigate to SNMP Traps. Perform required changes, click OK and Commit and Save