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This post gives a short explanation of NetFlow duplication problem, why it is important and how to overcome it. Network admins think about their data and if it is actually correct and deduplicated. And rightfully so! This should not be on their list of concerns - NetFlow analyzer should include out-of-the-box solution to this problem. Unfortunately, this is often not the case because exporting and processing NetFlow data depends on the network and its complexity.
In general, there are two ways duplication can occur:
Searching for these SQL commands is tempting every time, whether you have done it before.To avoid collecting these commands from different sources and wasting a lot of time, we have collected them all here to be reachable and available for everyone, anytime. These are the ones we needed and considered to be very useful...
As you probably noticed, interest toward NetFlow has sharply risen in the previous years. This is due to the fact that its dataset provides much more detail and effective traffic analysis than simple SNMP monitoring. It is also lightweight and it does not require to store big data and intrude on people's privacy as in the case of Deep-Packet Inspection.
For this reason, NetFlow has expanded its application beyond networking and it is now used even by system and security admins.