Shulou(Shulou.com)06/01 Report--

Generally speaking, SDN was born in the campus network in 2006, and 2012 is the first year of SDN business. Important events such as the deployment of sdn by google pushed SDN to the focus of global attention; at the same time, it was extended to telecom networks in 2012.

Let's introduce it in combination with major events (there are a lot of content, and you need to remember the key points for each event).

In 2006, SDN was born in the Clean Slate project of Stanford University funded by the GENI project in the United States. The research team led by Professor Nick McKeown of Stanford University put forward the concept of Openflow for the experimental innovation of campus network. Based on the programmable characteristics of Openflow to the network, the concept of SDN came into being. The ultimate goal of the Clean Slate project is to reinvent the Internet, which aims to change the existing network infrastructure whose design is somewhat outdated and difficult to evolve.

In 2007, Martin Casado (Martin Casado), a student from Stanford University, led a project on network security and management, Ethane. Through a centralized controller, network administrators can easily define security control policies based on network flow, and apply these security policies to various network devices, so as to achieve the security control of the whole network communication.

In 2008, inspired by Ethane and its previous project Sane, Professor Nick McKeown and others put forward the concept of OpenFlow, and published a paper entitled "OpenFlow: Enabling Innovation in Campus Networks" in ACM SIGCOMM that year, which introduced the concept of OpenFlow in detail for the first time. This paper not only describes the working principle of OpenFlow, but also enumerates several major application scenarios of OpenFlow.

Based on the programmability that OpenFlow brings to the network, Professor Nick McKeown and his team further put forward the concept of SDN (Software Defined Network, Software defined Network). In 2009, the concept of SDN was listed in the top ten cutting-edge technologies of Technology Review, and since then it has been widely recognized and strongly supported by academia and industry.

In December 2009, the OpenFlow specification released a landmark version 1.0 that can be used for commercial products. For example, the plug-ins supported by OpenFlow in Wireshark packet analysis tools, OpenFlow debugging tools (liboftrace), OpenFlow virtual computer simulation (OpenFlowVMS) and so on have become more and more mature. The OpenFlow specification has gone through versions 1.1, 1.2, and 1.3. The OpenFlow 1.4 standard has been reviewed internally by ONF and is expected to be approved for release in early August 2013.

In March 2011, with the promotion of Professor Nick Mckeown and others, the Open Network Foundation ONF was established, which is mainly committed to promoting the specification and development of SDN architecture and technology. There are 96 members of ONF, of which there are 7 core members who founded the organization, namely Google, Facebook, NTT, Verizon, Deutsche Telekom, Microsoft and Yahoo.

In May 2011, NEC launched the first commercially available OpenFlow switch

In April 2012, Google announced that its backbone network was fully operational on OpenFlow and was distributed in 12 data centers around the world through 10G network links, increasing the utilization of wide area lines from 30% to nearly saturated. Thus it is proved that OpenFlow is no longer just a research model in academia, but has fully possessed the technology maturity that can be applied in the product environment.

In July 2012, Nicira, a pioneer of software-defined networking (SDN) and a private holding company for network virtualization, an open source policy, was acquired by VMware for 1.26 billion. Nicira is a data center-disrupting startup that created a web virtual platform (NVP) based on open source technology OpenFlow. OpenFlow is an open source project created by Martin Casado, co-founder of Nicira, during his doctorate at Stanford. Nick McKeown and Scott Shenker, two Stanford professors of Martin Casado, also became founders of Nicira. The acquisition of VMware has turned all the technological research and development that Casado has been engaged in for more than a decade into a reality-stripping the network software from the hardware server is also the first step for SDN to enter the market.

At the end of 2012, AT&T, BT, Deutsche Telekom, Orange, Telecom Italia, Telef ó nica and Verizon jointly launched the Network function Virtualization Industry Alliance (Network Functions Virtualisation,NFV), which aims to introduce the concept of SDN into the telecommunications industry. It is formed by 52 network operators, telecom equipment suppliers, IT equipment suppliers and technology suppliers.

In April 2013, Cisco and IBM joined Microsoft, Big Switch, Brocade, Citrix, Dell, Ericsson, Fujitsu, Intel, Juniper Networks, Microsoft, NEC, Hewlett-Packard, Red Hat and VMware to establish Open Daylight to cooperate with the LINUX Foundation to develop software such as SDN controller and southbound / northbound API, which aims to break the monopoly of network hardware by large manufacturers, drive network technology innovation, and make network management easier and cheaper. There are only SDN suppliers in this organization, and there are no SDN users-the Internet or operators. The scope of the Open Daylight project includes SDN controllers, API proprietary extensions, etc., and announced the introduction of industrial-grade open source SDN controllers.

Simply add some background knowledge.

Clean Slate plan

Pain point: the existing network architecture is constantly mended, it is difficult to solve the fundamental problem, redefining the network architecture may be the fundamental solution, is it feasible to start all over again?

The ultimate goal of the CleanSlate project is to reinvent the Internet, which aims to change the existing network infrastructure whose design is somewhat outdated and difficult to evolve.

Leads to the concept of Clean Slate project in broad and narrow sense.

Broad sense: generally refers to a variety of next generation network (NGN) projects

Narrow sense: laboratory research project led by Professor Nick Nick McKeown of Stanford University (birthplace of SDN)

Ethane project (a sub-project of the CleanSlate project plan)

Martin, a student at Stanford. Casado (Nick McGeon is Martin's teacher) leads a project on network security and management, Ethane, which attempts to enable network administrators to easily define security control policies based on network flow through a centralized controller, and apply these security policies to various network devices, so as to realize the security control of the whole network communication.

Inspired by this project, Martin and his mentor Professor Nick McKeown put forward the concept of OpenFlow.

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