Once the Custom Monitor is created, you have to add the required SNMP attributes added to it. Follow these steps:
Click on Add attributes link.
It opens up Customize screen - Select a SNMP monitor from the combo box for adding the attributes. Click add.
Mib Browser opens up - select the MIB that contains the attribute to be added to the Custom Monitor.
Select the attributes that you want to monitor. Click Add to add the selected attributes.