Analysis of PCE-based path optimization in multi-domain SDN/MPLS/BGP-LS network
Grzegorz Rzym, Krzysztof Wajda, Krzysztof Rzym · 2016
Deployment of PCE (Path Computation Element) architecture in high-speed MPLS/GMPLS networks is at present widely accepted and helps to run path setup operations for applications with explicitly defined objective functions and also with QoS requirements. The paper reports on recent research investigations with PCE-based path computation employing 3-layer traffic engineering (TE) system: PCE module equipped with IBM Cplex LP solver is used in the highest layer, SDN controller in the intermediate layer responsible for transferring path setup requests towards virtual routers in the lowest layer. Presented results show usefulness of PCE architecture with SDN controller and applicability of bandwidth-oriented optimization with objective functions.