Abstract Many mission-critical applications such as video conferencing, video telephony cannot reliably run on today’s networks if only best-effort forwarding of traffic is used. Some means of classifying traffic and then forwarding classes of traffic in a preferred, or differentiated, manner is required.
Two main methods have been proposed for QoS on IP networks: Integrated Services (IntServ) and Differentiated Services (DiffServ). And several research works have been proposed to provide end-to-end QoS guaranteed service provisioning. The DiffServ-over-MPLS traffic engineering is one of the major approaches for end-to-end service provisioning. This mechanism supports per-domain QoS service provisioning. MPLS signaling protocols such as CR-LDP and RSVP-TE can be used in single domain only.
In order to provide QoS-guaranteed DiffServ-over-MPLS service across multiple domain networks, each NMS, which belongs to different domain network, should be able to collect the information of inter-AS connectivity and available network resources among all router ports on autonomous system (AS) boundaries, and also should be able to negotiate service level agreement (SLA) with other service providers and customers. Policy-based networking allows network operators to express their business goals as a set of rules, or policies, which are then enforced throughout the network and also allow such rules to be defined centrally but enforced in a distributed fashion.
Currently, most of the networking sites are built using devices produced by various vendors, which have no common standards in QoS provisioning technologies. Though DiffServ tends to become one of such common standards, there is no centralized repository for mapping behavior aggregates to per-hop behavior details. The primary goal of traditional network management is configuring network devices and obtaining network statistics. For end-to-end QoS service provisioning, this management manner is not sufficient, dynamic and automated network management technology is required instead. Policy-based networking can provide a good framework for dynamic network management. DMTF Web-Based Enterprise Management (WBEM) and Common Information Model (CIM) provide system and platform independent standards for distributed networking environments.
In this thesis, we propose policy-based management system with WBEM architecture and standard management information based on DMTF (Distributed Management Task Force) CIM (Common Information Model) to provide end-to-end QoS-guaranteed DiffServ-over-MPLS inter-AS traffic engineering. In our proposed architecture, SLA negotiation mechanism based on policy, SLP (service location protocol) based on service discovery, connection management and inter-AS OAM functions are also included. The detailed implementation of proposed system with performance analysis is explained.
From our experiments and performance analysis, we found that the policy instances are well integrated and manipulated by WBEM system architecture and performance of policy treatment is reasonable. From this point of view, the proposed architecture can be applied to QoS guaranteed DiffServ-over-MPLS service network. It can also support inter-AS environments.