For SNMP v1, set the host, port, and the SNMP community
For SNMP v2, click Edit > Settings > Change the SNMP version to v2 > Click Ok. Set the host, port, and the SNMP community
For SNMP v3, click Edit > Settings > Change the SNMP version to v3 > Click Add. Set the host, port, user name, authentication credentials and click ok