From the course: Cisco Network Security: Intrusion Detection and Prevention

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Analyze the flow

Analyze the flow - Cisco Routers Tutorial

From the course: Cisco Network Security: Intrusion Detection and Prevention

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Analyze the flow

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- [Instructor] Today there are more devices connecting to the network and networks are becoming larger and faster every day. Being able to analyze the flow of traffic across the network is an important function in providing the ability to troubleshoot the network and ensure system security. One tool administers can use is NetFlow. NetFlow was developed by Cisco over 20 years ago to provide a way to aggregate data as it passes through the network. It's used on routers to analyze traffic as it passes in or out of an interface. It gathers data on each flow into a compact record. This differs for the granular and somewhat cumbersome collection of traffic using standard protocol analysis tool. I'm in Wireshark where we see a number of different packets. Now, we could filter by conversation, and we'll do that. We'll narrow this by one conversation, but you still see many different records. In some cases, we simply want a transaction that reduces the amount of information collected from a…

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