Network system and switching method thereof

摘要

A network system of the present invention includes a switch and a controller. The controller sets a flow entry, in which are defined a rule and an action used to uniformly control a packet as a flow, in a flow table of the switch. The switch determines whether or not to perform a sampling processing to a received packet, in accordance with the flow table setting, and notifies the controller of a sampling result in a case where a sampling processing is performed to the received packet. The controller updates the flow table in accordance with the sampling result and narrows packets to perform a sampling processing.

主权项

1. A network system, comprising:
a switch; and a controller configured to set a flow entry, in which are defined a rule and an action used to uniformly control a packet as a flow, in a flow table of said switch, the rule indicating a header field value of the packet, the action at least specifying whether sampling instruction is to be performed, wherein said switch determines whether or not a sampling processing section performs a sampling processing to a received packet as a sampled packet, in accordance with a flow table setting, and notifies said controller of information on said sampled packet in a case where a sampling processing has been performed to said received packet, and wherein said controller updates said flow table on a basis of analysis of said notified information on said sampled packet and narrows packets to perform said sampling processing.