IPFIX is an IETF protocol for exporting flow information.

A flow is defined as a set of packets transmitted in a specific timeslot, and sharing the same 5-tuple values - source IP address, source port, destination IP address, destination port, and protocol. The flow information may include properties such as timestamps, packets/bytes count, Input/Output interfaces, TCP Flags, VXLAN ID, Encapsulated flow information, and so on.