CA Performance Management provides a method where the discovered devices can be set to use different Device Type assignments than the product uses by default.
We Override the Device Types and Context Types by editing the DeviceTypes.xml file on the Data Aggregator.
If this isn't working as expected we can enable debug to track the messaging for the function in search of a cause.
All supported Performance Management releases
This is debug that was first introduced in the GA r3.6 release and the r3.5 April Monthly Update kit. It is available in all releases newer than that.
NOTE: CA Remote Engineer (CARE) re.sh script instructions can be found in the r3.7 documentation here:
Same instructions in the r20.2.x release: