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SDN – An IntroductionP. 1/15 13 February 2014
SDN – An Introduction
13 February 2014
SDN – An IntroductionP. 2/15 13 February 2014
Software-Defined Networking
An Introduction
Johan Schoofs – BELTUG Project M...
SDN – An IntroductionP. 3/15 13 February 2014
Objective
Objective
Give you a barebones introduction to a new networking pa...
SDN – An IntroductionP. 4/15 13 February 2014
Trends in ICT
Major Trends in ICT
Computing
Virtualisation
Cloud computing: ...
SDN – An IntroductionP. 5/15 13 February 2014
Industry Response
A Late but Swelling Response from the Networking Industry
...
SDN – An IntroductionP. 6/15 13 February 2014
Centralised Control
Business Benefit 1: Centralised Control
Without SDN: dat...
SDN – An IntroductionP. 7/15 13 February 2014
Centralised Control
Business Benefit 1: Centralised Control
With SDN: data p...
SDN – An IntroductionP. 8/15 13 February 2014
Centralised Control
Business Benefit 1: Centralised Control
An omniscient ce...
SDN – An IntroductionP. 9/15 13 February 2014
Programmability
Business Benefit 2: Programmability
Traditional network conf...
SDN – An IntroductionP. 10/15 13 February 2014
Programmability
Business Benefit 2: Programmability
Anything available yet?...
SDN – An IntroductionP. 11/15 13 February 2014
Orchestration
Business Benefit 3: Orchestration
Provisioning the network in...
SDN – An IntroductionP. 12/15 13 February 2014
Virtualisation
Business Benefit 4: Virtualisation
Let’s virtualise the netw...
SDN – An IntroductionP. 13/15 13 February 2014
NFV
Network Functions Virtualisation
SDN – An IntroductionP. 14/15 13 February 2014
Bleeding Edge Technology?
Caveats:
Keep the following in mind:
SDN is an ov...
SDN – An IntroductionP. 15/15 13 February 2014
Thanks for Your Attention!
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SDN - A 15 Minute Introduction

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SDN - A 15 Minute Introduction

  1. 1. SDN – An IntroductionP. 1/15 13 February 2014 SDN – An Introduction 13 February 2014
  2. 2. SDN – An IntroductionP. 2/15 13 February 2014 Software-Defined Networking An Introduction Johan Schoofs – BELTUG Project Manager johan.schoofs@beltug.be
  3. 3. SDN – An IntroductionP. 3/15 13 February 2014 Objective Objective Give you a barebones introduction to a new networking paradigm that could shake up the way we think about networking $ 1.26 billion!
  4. 4. SDN – An IntroductionP. 4/15 13 February 2014 Trends in ICT Major Trends in ICT Computing Virtualisation Cloud computing: broad network access, on-demand self- service, resource pooling, measured service, rapid elasticity Major impact! Networking Incremental upgrades to bandwidth Same old protocols and mechanisms Lack of real innovation and thus stagnation! James Hamilton (Amazon Web Services) in 2010: Data center networks are in my way!
  5. 5. SDN – An IntroductionP. 5/15 13 February 2014 Industry Response A Late but Swelling Response from the Networking Industry Wanted: more flexibility and ease of use/management! Innovation through software-defined networking (SDN) Potential business benefits are linked to: Centralised control Programmability Orchestration Virtualisation Remove the network as the limiting factor for virtualisation and cloud services
  6. 6. SDN – An IntroductionP. 6/15 13 February 2014 Centralised Control Business Benefit 1: Centralised Control Without SDN: data and control plane integrated in forwarders (switch/router) F1 F2 F4 F3 Control Data
  7. 7. SDN – An IntroductionP. 7/15 13 February 2014 Centralised Control Business Benefit 1: Centralised Control With SDN: data plane in forwarder, control plane in logically centralised controller F1 F2 F4 F3 Controller
  8. 8. SDN – An IntroductionP. 8/15 13 February 2014 Centralised Control Business Benefit 1: Centralised Control An omniscient central controller It knows were the hosts are It known what the network topology looks like It programs the forwarding state of the forwarders Examples: Create a logical test network that runs on the same physical network that runs the production network Enforce policies on dynamically learned traffic flows to maintain QoS Real least cost routing based on the financial cost Intelligent network security shunting particular flows Traffic mirroring for logging, reporting or analysis
  9. 9. SDN – An IntroductionP. 9/15 13 February 2014 Programmability Business Benefit 2: Programmability Traditional network configuration is: Done with a CLI (scripts) or GUI interface Time-consuming, error-prone, tedious SNMP: too limited, where are the tools? Needed: full APIs that allow the use of powerful tools SDN delivers! Examples: Much richer scripts that allow for automated provisioning Orchestration tools to support the introduction of new business applications
  10. 10. SDN – An IntroductionP. 10/15 13 February 2014 Programmability Business Benefit 2: Programmability Anything available yet? Custom APIs: Cisco’s onePK, Juniper’s Juno, … Open APIs: OpenFlow (see the Open Networking Foundation) Supported by many switch vendor such as Alcatel-Lucent, HP, Juniper, Cisco, Big Switch Networks, Brocade Communications, NEC, Dell, IBM,… Open-source OpenFlow controllers: Floodlight, MUL, NOX,…
  11. 11. SDN – An IntroductionP. 11/15 13 February 2014 Orchestration Business Benefit 3: Orchestration Provisioning the network in a coordinated/automated way with servers, storage and applications Goals: quicker, large scale and less errors in network provisioning Available tools mainly aimed at cloud service providers now: rapid provisioning of multi-tenant logical networks spanning multiple datacentres The long view: network provisioning integrated with broader IT orchestration will be the norm for all networks in the future
  12. 12. SDN – An IntroductionP. 12/15 13 February 2014 Virtualisation Business Benefit 4: Virtualisation Let’s virtualise the network like we have successfully virtualised the server and storage! This is not completely new: VLANs + Q-in-Q tunnels, MPLS but mainly service provider oriented, not datacentre oriented Allows for the creation of overlays: the new virtual network without the limitations of IEEE VLANs But: the SDN controller will allow you to deploy and maintain the virtual networks in an easy manageable way
  13. 13. SDN – An IntroductionP. 13/15 13 February 2014 NFV Network Functions Virtualisation
  14. 14. SDN – An IntroductionP. 14/15 13 February 2014 Bleeding Edge Technology? Caveats: Keep the following in mind: SDN is an overloaded term This technology is young and evolving fast Not yet fully mature But already in use by Amazon, Google, Microsoft, RackSpace,… Open standards are being worked out by the IETF A project to watch: OpenDaylight “At this early stage of SDN and NFV adoption, the industry acknowledges the benefits of establishing an open, reference framework for programmability and control through an open source SDN and NFV solution. Such a framework maintains the flexibility and choice to allow organizations to deploy SDN and NFV as they please, yet still mitigates many of the risks of adopting early stage technologies and integrating with existing infrastructure investments.”
  15. 15. SDN – An IntroductionP. 15/15 13 February 2014 Thanks for Your Attention!

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