Segment Routing is a routing technique proposed by one the most important manufacturers of telecommunication equipment: Cisco. Its aim is simplifying the Internet routing protocols and satisfying the speed requirements of cloud-services. In this paper we demonstrate that the default behaviour of Segment Routing is not the best in terms of network performance and what configuration should be used.\ud \ud The Internet Engineering Task Force, a large open international community of vendors, researchers, operators and engineers, has been using published work on Segment Routing to produce the standards that modern equipment must follow to interoperate and improve Internet capabilities.