SDN and Optical Flow Steering for Network Function Virtualization
نویسندگان
چکیده
Introduction Middlebox traffic steering, the capability of routing traffic through different sequences of middleboxes, has been a popular application in software-define networks (SDN) [5]. In this work, we focus on network function virtualization (NFV) [2][3], especially on core virtualized network functions that process high-volume traffic, such as session border controllers (SBCs) and serving/gateway GPRS support node (SGSN/GGSN). While these core network functions (NFs) run in a virtualized environment in a data center/cloud instead of dedicated hardware, their locations are more dynamic and thus there is a strong need to steer traffic through them dynamically. Similar to [5], traffic will need to be routed across various intermediate NFs before reaching its destination, e.g. at the customer PE. This process is called traffic steering for NFV. Different from traditional middleboxes, the core NFs handle much higher volumes of traffic, and usually don't have the same fine-grained traffic steering requirements that normal middleboxes do. Thus, we argue that existing Layer2/Layer3 packet based traffic steering will have scalability issue for large traffic volume, and may also be associated with high energy cost.
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تاریخ انتشار 2014