Asymmetric Extended Route Optimization (AERO)

Abstract

Modern enterprise networks must accommodate mobile devices such as cell phones, tablets and laptop computers. When a mobile device moves to a new access network, it often receives a new Internet Protocol (IP) address. This can disrupt communication sessions and create challenges for locating and tracking mobile assets. The enterprise network should therefore provide each mobile device with a stable IP address or prefix that never changes, but this requires a new mobility architecture. Asymmetric Extended Route Optimization (AERO) supports mobility by modeling the enterprise network as a virtual link through a process known as encapsulation. The AERO system tracks mobile devices through control message signaling and an efficient routing system. AERO maintains optimal routes for roaming devices so that performance is maximized and congestion points are avoided. This chapter describes the AERO system for accommodating mobile devices within enterprise networks.