SERVICE CHAINING SYSTEM BASED ON SOFTWARE DEFINED NETWORKS

摘要

The present invention relates to a method for supplying a service chaining in a network based on a software defined network (SDN) which supplies an optimized network path for every service and variably supplies a network function according to a traffic state. According to the method, a management is convenient, a service chaining is dynamically implemented, and an automatic operation is implemented. The method of the present invention comprises the steps of: receiving, from a controller, a first packet-in message, in which an entry corresponding to a field extracted from a service request packet in a first switch does not exist; extracting a service identifier for indicating a kind of the request service from the first packet-in message and a user identifier for identifying the user; and searching an entry DB whether an entry list exists or not wherein the entry list enables transmission of the service request packet to a network function list corresponding to the service identifier and the user identifier by referring a service table, a user table, and a network function table which are associated each other.