Analysis of Network’s QoS in Service Chains

New network architectures like 5G adopt new service models where more providers share the infrastructure and offer different network services for users. The slicing concept in 5G networks is important to provide flexible, scalable, and on- demand solutions for the vast array of applications in networks. In this paper, we present a multilayer network model that allows the Service Function Chaining (SFC) with the support of multitenant slices. To analyze the Quality of Service in the slices, we set up a network with few virtual routers over Amazon Web Services (AWS) and use a variety of technologies such as Segment Routing (SR) for implementing Service Chains. We analyze SFC algorithms with different capabilities in avoiding overloads on the network links. The analysis shows the impact of traffic load increase on packet losses and the impact of deploying more slices on the same infrastructure.