Analysis of Interdomain Smart Routing and Traffic Engineering Interactions

Multihoming smart routing plays a significant role in improving the performance of Internet access of IP network customers through dynamic path switching. On the other hand, inter-domain traffic engineering becomes indispensable for IP network providers, in order for them to meet their traffic objectives. Unfortunately, this ability of both parties to choose their own routing policies does not necessary lead to the best routing in the Internet. A major challenge of the research on traffic engineering and Internet routing architectures is to accommodate this tussle. However, little is known about the interactions between Inter-domain smart routing and traffic engineering. In this paper, we analyse such interactions through intuitive descriptions and a simulation model. In our evaluations, we observed that the overall stability can benefit from combining Inter-domain adaptive smart routing and traffic engineering. However, we also observed that the effectiveness of Inter-domain traffic engineering can be negatively affected by interdomain routing changes performed by smart routing.