WBEM-based Inter-AS Performance Monitoring for QoS-guaranteed DiffServ-over-MPLS

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). Constraint-based routing for guaranteed QoS provisioning must be used in the LSP establishment phase. The established LSPs must be continuously monitored by the performance management function to verify the assured performance and QoS parameters. However, in current network managements of public network operators, MOs of inter-AS traffic engineering for QoSguaranteed DiffServ are not well standardized in public domain. As a result, it is not possible to easily collect the performance information across multiple domain networks to analyze end-to-end performance, and it is extremely difficult to find out which of the transit network domain has violated negotiation in the case of performance degradation. In this paper we propose a WBEM-based inter-autonomous (AS) system performance management architecture for QoS-guaranteed DiffServ-over-MPLS network. The WBEM based network management system (NMS) must manage the real network to configure the performance management function to monitor the network utilization and to verify the network performance compared with the agreed Service Level agreement (SLA). The proposed performance monitoring system provides end-to-end, edge-to-edge and TE link QoS performance monitoring and management. As a result, any severely degraded performance compared with the agreed performance level can be treated promptly to guarantee the agreed QoS provisioning.