Indicates the source of Top Flows report generation for
the entries populated in cnfTopFlowsTable.
'other' - The Top Flows are not available or the source
of the Top Flows cannot be identified.
'hardware' - The Top Flows report has been generated based
on the flows detected by the hardware platform
with netflow capabilities.
'software' - The Top Flows report has been generated based
on the flows detected by the software.
'both' - The Top Flows report is an integrated list of
Top Flows detected by both the hardware
platform and the software.