Method for counting active flows, network device, and system

Abstract

The invention provides a method for counting active flows, and a network device, and a system. The method includes the steps that a first network device receives a head packet of a first group of datapackets sent by a second network device, and adds 1 to the current number of active flows to obtain the number of first active flows; the first network device receives the tail packet of the first group of data packets sent by the second network device, and determines a first congestion value according to the number of data packets in the first group of data packets with the ECN (external congestion notification) identifiers; subtracting one from the number of first active flows through the first network device when the first congestion value is less than a congestion threshold value, so as to obtain the number of second active flows; enabling the first network device to maintain the number of the first active flows when the first congestion value is greater than or equal to the congestion threshold value. This method can achieve the more accurate counting of the active flows.

Description

technical field [0001] The present application relates to the field of network technologies, and more specifically, to a method, network device and system for counting the number of active flows. Background technique [0002] In many scenarios, in order to understand the status of data streams received by the network device, it is often necessary to count the number of active data streams received by the network device. For example, in the field of congestion control and bandwidth allocation, it is necessary to count the number of active flows in the network, and then perform congestion control or bandwidth allocation according to the number of active flows. [0003] Traditional solutions generally determine whether a data flow is an active flow according to whether a data packet is received within a fixed time window, and then count the number of active flows. For example, if the network device receives the data packet of the first data flow within the first time window, t...

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Problems solved by technology

[0004] However, in different scenarios, for example, in different networking methods, different traffic models, and grid architectures where congestion may occur, if the traditional solution is still used to count the number of active flows based on a fixed time window, it is very difficult It may lead to inaccurate statistics on the number of active flows, so that the number of active flows obtained by statistics cannot reflect the real situation of network transmission data flows

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