Go to Settings > NCM > Device Template.
Click on the device template to edit it.
Select the Device Identifier tab in the edit wizard.
Click on Add SysOID
If you already know the SysOID, click on skip to go to next stage and ignore the next 3 steps.
Enter the device hostname/ip addresss for which you want to find SysOID.
Enter the appropriate SNMP parameters.
Click on Next.
NCM will detect the SysOID for your device (If you chose to skip the previous steps, please enter the SysOID manually).
Enter the Series and Model for the device template.
Click on Save.