Patent ID: 8677011
Filing Date: 2014-03-18
Classification: G06F,H04L

Abstract:
1. A load distribution system, comprising: at least one packet forwarding apparatus comprising: a packet forwarding unit that forwards a packet by using a forwarding rule sent from a flow control apparatus; and a flow end check unit that detects a flow end; a load distribution apparatus that determines a load distribution destination from among a plurality of service provider servers by referring to a flow end notification sent from the flow control apparatus; and a flow control apparatus comprising: a flow route setting unit that determines a forwarding route for a flow using a service provider server determined by the load distribution apparatus and notifies a packet forwarding apparatus on the forwarding route of a forwarding rule realizing the forwarding route; and a flow end determination unit that notifies the load distribution apparatus of a flow end, based on flow end information detected by the packet forwarding apparatus; and a load distribution apparatus comprises: a load distribution destination storage unit that stores a service provider server determined as the load distribution destination; a load monitoring unit that monitors load on a calculator serving as the packet forwarding apparatus or the service provider server; and a load distribution destination determination unit that manages an allocation state of service provider servers by deleting a service provider server for the ended flow from the load distribution destination storage unit, based on a flow end notification sent from the flow control apparatus, and determining a load distribution destination from among the plurality of service provider servers, based on an allocation state of each service provider server managed by the load distribution destination storage unit and a load state of a calculator serving as the packet forwarding apparatus or the service provider server monitored by the load monitoring unit.