![]() Each datagram consists of up to 30 flows. NetFlow exportįlows are grouped for export into a NetFlow Export datagram. Data is expired and then exported from the cache to a NetFlow collector server at regular intervals based on flow timers. ![]() A flow record is kept for each active flow. This data is condensed into a database within the network device called the NetFlow cache. Monitoring and grouping every packet forwarded by a router or switch generates a lot of data. Any variation in the value of any one of the parameters creates a new flow. Each additional packet with the same parameters (source and destination IP addresses, source and destination port, class of service) is grouped into a single flow. ![]() A flow is generated by the first packet passing through the standard switching path. These sets can be configured based on matching attributes in each packet, including:Īs each packet is forwarded, the respective attributes are examined. A flow is a way of grouping a unidirectional stream of packets into a specific set. ![]()
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