Comprehensive and Detailed Explanation From Exact Extract:
Duplicate flow data typically results when both ingress and egress flow monitoring are applied simultaneously on interfaces. If both directions are enabled either globally (all interfaces) or locally (on a single interface), the same flow is counted twice—once entering and once leaving—resulting in duplicate statistics.
[Reference:, , "To avoid duplicate flow data, do not enable both ingress and egress NetFlow on the same interface or across all interfaces. Doing so will cause the same packets to be exported twice and counted as duplicates in reports and charts.", — (Network Performance Monitor Administrator Guide, NetFlow configuration best practices section), , ===========, ]
Submit