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