COMMUNICATION SYSTEM AND METHOD FOR CONTROLLING COMMUNICATION, AND CONTROL PROGRAM RECORDING MEDIUM

摘要

PROBLEM TO BE SOLVED: To provide a communication unit in which the installation of a BGP is not required for a customer communication unit and for an edge communication unit at a border between a customer network and a provider network, to prevent a load from being increased and, to provide a communication system that uses the communication unit. SOLUTION: In a virtual private network(VPN), consisting of customer networks A1-A4 and a provider network C1 utilizing tunneling technology, a function for terminating IGPs(Interior Gateway Protocols) in the customer networks is provided to edge nodes 41-43 placed at the border between the customer networks and the provider network. Thus, the installation of the BGP(Border Gateway Protocol) is not required with respect to customer nodes and to the edge nodes, at the border between the customer networks and the provider network.