Context-Aware Service Function Chaining and Its Cost-Effective Orchestration in Multi-Domain Networks

Context-Aware Service Function Chaining and Its Cost-Effective Orchestration in Multi-Domain Networks

Blog Article

The emergence of software-defined networking (SDN) and network function virtualization easton speed comp -13 (NFV) facilitates policy-driven and dynamic service function chaining (SFC).In recent years, multi-domain SFC orchestration has attracted a significant attention, as it is a complicated problem involving many issues, such as corporation of various administrations and integration of heterogeneous underlying technologies.However, as another critical problem for multi-domain SFC deployment, how to achieve context-aware service provision is still not widely discussed.

Thus, in this paper, based on the hierarchical SFC architecture, we allocate metadata to share context information of packets and realize context-based and dynamic SFC in multi-domain networks.We design typical use cases and conduct related experiments about location-aware flow steering and denial of service attack elimination.Experimental results confirm the feasibility and elasticity of our proposed approach.

Furthermore, to alleviate the resource over-provisioning problem of context-aware SFC orchestration, we propose a consolidation-based SF placement and chaining algorithm with an online feedback mechanism.We compare the performance of our algorithm with a related greedy algorithm and rembrandt - acquerello stucco a tabu search algorithm.Simulation results demonstrate that the proposed algorithm is efficient to reduce the reject rate and improve the revenue-cost ratio, with a compromise on node load balance.