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When you add a new node the required fields will be name, host name/IP Address, Group, and SNMP community if you are using SNMP for collect or WMI username and password if you are using WMI for collect.
Then scroll to the bottom and click on the "Add and Update Node" button.
2º Option: We can create a node from the GUI using the menu System > System Configuration > Nodes (Devices):
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