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A lot of applications depend on reliable and stable Internet connectivity.These characteristics are crucial for mission-critical services such astelemedical applications. An important factor that can affect connectionavailability is the convergence time of BGP, the de-facto inter-domain routing(IDR) protocol in the Internet. After a routing change, it may take severalminutes until the network converges and BGP routing becomes stable again.Kotronis et al propose a novel Internet routing approach based on SDNprinciples that combines several Autonomous Systems (AS) into groups, calledclusters, and introduces a logically centralized routing decision process forthe cluster participants. One of the goals of this concept is to stabilize theIDR system and bring down its convergence time. However, testing whether suchapproaches can improve on BGP problems requires hybrid SDN and BGPexperimentation tools that can emulate multiple ASes. Presently, there is alack of an easy to use public tool for this purpose. This work fills this gapby building a suitable emulation framework and evaluating the effect that aproof-of-concept IDR controller has on IDR convergence time.

Evaluating the Effect of Centralization on Routing Convergence on a Hybrid BGP-SDN Emulation Framework