Internet Routing: Separating Customers from Providers

To address the serious challenges in scalability, stabil-ity and security facing the global routing infrastructure today, we propose a new routing architecture SIRA1, which separates Internet providers and customers to dif-ferent address and routing spaces. This separation insu-lates the core routing infrastructure from the growth, dy-namics and security threats generated by edge customers, promotes site multi-homing by eliminating provider-dependent addresses, and provides multi-homed cus-tomers an explicit channel to express their preferences among their providers. We also identify the major chal-lenges in engineering the proposed seaparation, namely how to design a robust and secure mapping service, and how to bridge the two separate routing spaces