Patent ID: 8358592
Filing Date: 2013-01-22
Classification: H04L

Abstract:
1. A network controller for controlling a network that transmits and receives packets, comprising: a first count section for counting the number of received packets having the same values for a first item group, the first item group consisting of a selected one or more items within a plurality of items contained in a flow information of the received packets, a second count section for counting the number of received packets having the same values for a predetermined one or more items in addition to the first item group of the flow information of the received packets, and a specific traffic detecting section that determines whether the count by the first count section exceeds a threshold and, if the count by the first count section exceeds the threshold, referring to the count by the second count section to determine abnormality types based on the count by the second count section, wherein both of the count by the first count section and the count by the second count section are always incremented every time the network controller receives a packet having the same values for the first item group and for the predetermined one or more items in addition to the first item group of the flow information.