1_SDN培训_概论（概念定义+产业现状+关键技术）.pptx

软件定义网络概念定义、产业现状、关键技术2015 年 10 月目录概念定义产业现状关键技术SDN = Still Don’t kNow定义1：来自 WikipediaAn approach to computer networking which abstracts the control plane and the data planeEnables management of network services through abstraction of lower level functionality into virtual servicesProvides programmable central control of networks without requiring physical access to the network HWDecouples systems that makes decisions (match action) about where traffic is sent (control plane) from underlying systems that forwards traffic to selected destination (data plane)定义2：来自 ONF white paperAn emerging network architecture where network control is decoupled from forwarding and is directly programmableEnables the underlying infrastructure to be abstracted for applications and network services, which can treat the network as a logical or virtual entityNetwork intelligence is (logically) centralized in software-based SDN controllers, which maintain a global view of the network定义3：来自 ITU-TA networking technology which allows centralized, programmable control planes and data plane abstractionControl and data planes are separated, so network operators can directly control and manage their virtualized resources and networks定义4：来自Heavy ReadingAn architectural concept that encompasses the programmability of multiple network layers – including management, network services, control, forwarding and transport planesto optimize the use of network resources, increase network agility, unleash service innovation, accelerate service time-to- market, extract business intelligence and ultimately enable dynamic, service-driven virtual networks.定义5：来自Infonetics ResearchA subset of programmable networksEnable networking applications to request and manipulate services provided by the networkand allow the network to expose network state back to the applicationsProgrammable NetworksSDNsSDN2 common types of SDNsAPIControl plane abstracted from data planeSDN “API”protocols“Control Plane” Protocols* OpenFlow*