Design and Implementation of Performance Management for the DiffServ-aware-MPLS Network

MPLS has been developed to provide efficient traffic engineering capability for the massive high-speed Internet traffic. The major advantages of the MPLS are (i) fast label switching mechanism to increase the packet forwarding capability, and (ii) the connection oriented traffic engineering to provide flexible load balancing in the transit network. DiffServ-over-MPLS architecture provides differentiated services with guaranteed quality-of-service(QoS). For the QoSguaranteed service provisioning, current IP networks, although they offer flexibility and scalability, need to be enhanced in availability and guaranteed QoS provisioning. To guarantee the user-requested QoS and to keep the network utilization at maximum, the performance management of DiffServ-over-MPLS is essential. The performance management function monitors the network utilization and verifies the network performance compared with the agreed SLA (Service Level agreement). In this paper, we propose an object-oriented(OO) performance management module for the integrated management of DiffServ-over-MPLS network. We define the managed object(MO) of the MPLS LSPs and ports of the MPLS network, and provide the traffic monitoring and analysis by using the MO of the LSP and port, so that we can easily manage devices that had been added newly to the network. If the monitored performance becomes severely degraded, the performance management module notifies the fault management module. Performance management module stores log records of performance measurement and analysis, and provides web-reporting on the performance measurement and analysis results.