1 Traffic Engineering and Network Management System for QoS-Guaranteed

This paper proposes an integrated traffic engineering and management system for DiffServ-over-MPLS services in Next Generation Internet (NGI). Using the proposed traffic engineering functions for DiffServ-over-MPLS network, the Internet service provider (ISP) can easily configure Diffserv-over-MPLS traffic flows among customer’s distributed sites, and can provide guaranteed end-to-end QoS by controlling the virtual topology of MPLS tunnel LSPs which are configured by MPLS traffic engineering. We explain the requirements and overall operations of the DiffServ-over-MPLS traffic engineering, the architecture of MPLS network management system, and its detailed functions for network configuration, MPLS E-LSP establishment, performance management, fault management, and MPLS-based VPN. This paper also provides the experimental results and performance analysis of the proposed traffic engineering and management system that configured and managed a sample DiffServ-over-MPLS network with Cisco MPLS routers