As the Internet becomes increasingly popular, constant increase in demand for network traffic has been an issue. In order to avoid traffic congestion and to maintain link quality, various traffic engineering (TE) technologies, which utilize processing ability of a routing node, are being researched and developed. However, existing "offline-method of TE" lacks reaction sensitivity and adaptability in topology changes. On the other hand, "online-method of TE" contains a SPOF (single point of failure) issue and an adjustability issue in a network of complex topology. This paper proposes NREI (...