What is a flow?

Q. What is a flow?

A. A flow is a measure of data transferred between two particular hosts. It consists of all the traffic for a period of time that has these same characteristics:

• * Same Source IP address and port
  * Same Destination IP address and port
  * Same layer-3 protocol type (TCP, UDP, ICMP, etc.)
  * Same ToS (type of service)
  * Same input logical interface (e.g., ifIndex)