A survey of SDN: Past, Present and Future of Programmable Networks

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A survey of SDN: Past, Present and Future of Programmable Networks

Speaker : Yu-Fu Huang

Advisor : Dr. Kai-Wei Ke

Date: 2014/Sep./30

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Outline

Current internet architecture Software Defined Network (SDN) OpenFlow architecture SDN application via OpenFlow architecture Research Challenges and Future Directions References

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Current Network Device

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Current Network is closed

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Internet Ossification

Internet is built from a large number of network devices: Routers, switches, numerous types of middleboxes

and many complex protocols Simplified best-effort distributed network functions

are implemented in vertical-integrated black boxes. Network management & performance tuning

are quite challenging.

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Internet Evolvement

SDN & (HSN & Digital Convergence)

Smart Devices

(IOT)

Cloud Service

s

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Software Defined Network

Forwarding hardware (data plane) is decoupled from control decisions (control plane).

Data plane can be programmed via an open interface like OpenFlow.

So, SDN is a Programmable network. Network resources virtualization. Controller can be viewed as a Network

Operating System.

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SDN Architecture

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SDN Architecture

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SDN Architecture

API

Network Resources

(Virtualization like)(PC memory &

Storage)

NOS

Commodity

Like PC

3’rd party application

s

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SDN Architecture

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Open Source Controllers

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Floodlight NB APIs

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OpenDaylight NB APIs

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Benefits of SDN

Centralized control Simplified algorithms Commoditizing network hardware Eliminating middleboxes Enabling the design & deployment of 3’rd

party applications

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Core Values of SDN

Reduced Opex

Innovative

Services

Reduced Capex

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OpenFlow Architecture

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OpenFlow Switch

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Elements of an OpenFlow-compliant switch

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Matching Field of a Flow table entry

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Capabilities of OpenFlow

Centralized control of the network Software-based traffic analysis Dynamic updating of forwarding rules Flow abstraction

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Difference between SDN & OpenFlow

SDN abstracts the whole Network-wide state like OS to PC. OpenFlow abstracts a Network component like Diver to OS.

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Core Capabilities of SDN

Dynamic adjustment

via Software

Programming

Network-Aware

Controller

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SDN Applications via OpenFlow

Ease of configuration Network management Security Availability

Load balance Fault tolerance

Network virtualization

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SDN Applications via OpenFlow

Ease of configuration Data center virtualization Wide area network application Wireless application Other application

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Packet & Circuit Network Convergence with OpenFlow

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OpenFlow Unified Architecture

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Unified abstraction for packet & circuit switches

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Research Challenges and Future Directions

Controller and Switch Design Software-Defined Internetworking Controller-Service Interaction Virtualization and Cloud Services Information-Centric Networking Heterogeneous Network Support

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References

Bruno Astuto A. Nunes, Marc Mendonca, Xuan-Nam Nguyen, Katia Obraczka and Thierry Turletti, “A Survey of Software-Defined Networking: Past, Present, and Future of Programmable Networks” hal-00825087, version 5-19 Jan 2014.

Adrian Lara, Anisha Kolasani, and Byrav Ramamurthy, “Network Innovation using OpenFlow: A Survey” IEEE communication surveys & tutorials, 2013.

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References

Saurav Das, Guru Parulkar, Nick McKeown, “Packet and Circuit Network Convergence with OpenFlow” Department of Electrical Engineering, Stanford University, California 94305, USA.

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Thanks for listening