Do you have the OID to classify this device in your SNMP OID Table?
If not, you might want to add it.
Based on what I'm seeing the OID for this device is 1.3.6.1.4.1.1588.2.1.1.120ServiceNow should have an OID Classifier with 1.3.6.1.4.1.1588.2.1.1.1...