How much data is generated by Netflow?
Netflow will add minimal network impact e.g. for a typical MPLS network, 1 packet will be sent every 2-3 seconds from a remote location. Netusage also reports the number of netflow datagram per second for each NetFlow device. Below illustrate how to estimate NetFlow impact to the network. The volume of traffic generated by enabling Cisco NetFlow can be estimated after enabling Cisco NetFlow caching but prior to enabling data export. This is a four-step process: • Use the “show interface switching” command to determine the average throughput in packets per second, for all relevant interfaces. • Use the “show ip cache flow” command to verify the average number of packets per flow, • Calculate the total number of flow per second = average packets per second / average packets per flow, • Use the number of flows per export packet and export packet length (these vary from 24 to 51 fpp and from 1200 to 1500 bytes respectively, depending on record format version) to calculate total exported tr
Related Questions
- end Cisco routers support router-based netflow aggregation to reduce export data volume and improve scalability. Does cflowd support all these aggregations?
- My device has been set up to export NetFlow data, but I still don see it on the Dashboard. Why?.
- What are popular ways to read and/or post-process NetFlow data?
