The IP groups data doesn't add up to the total traffic

The IP groups data doesn't add up to the total traffic

Hi,

I have configured Netflow on routers across my network WAN. I have configured some IP groups on the Netflow server. The issue is that when I add the traffic from Individual IP groups it comes more than the total traffic passed on that interface.
This negative data is around 35% of total traffic.

I have made sure that all the IPs in these IP groups are different and are not repeated. Also these are only destination IPs and no Source-Destination IP pair is there. 

Can you suggest what might be the problem? Need urgent help to fix this.

-Tanay Pratap
Cypress Semiconductor

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