METHOD AND SYSTEM FOR COLLECTING STATISTICS ABOUT THE NUMBER OF ACTIVE FLOWS, AND NETWORK DEVICE

摘要

This application provides a method and a system for counting a quantity of active flows and a network device. The method includes: A first network device receives a first packet of a first group of data packets sent by a second network device, and increases a current quantity of active flows by 1, to obtain a first quantity of active flows; the first network device receives a last packet of the first group of data packets sent by the second network device, and determines a first congestion value based on a quantity of data packets that carry an explicit congestion notification ECN identifier in the first group of data packets; and when the first congestion value is less than a congestion threshold, the first network device decreases the first quantity of active flows by 1, to obtain a second quantity of active flows; or when the first congestion value is greater than or equal to the congestion threshold, the first network device keeps the first quantity of active flows unchanged. In this application, the quantity of active flows can be more accurately counted.