Often when trouble shooting discovery, polling and data validation issues debug from the Data Collector DCDebug page is required.
This details how to enable the debug for polling against the often used Interface Metric Family.
The instructions can be used to simply download the full logging for a device without enabling the debug or it can include the logging as needed.
Follow the instructions provided by the support request.
All supported Performance Management releases
Enable the logging as follows.
Collect the logging as follows.
Disable the logging as follows.