Software Defined Networks

Transcription

1 Software Defined Networks Inevitable Must for Media Technology By Mohamad Reza Noorifard December 13, 2017 M.R. Noorifard M. Behdadfar T. Shabanian 1

2 Outline Introduction Simplified SDN Architecture SDN Applications SDN & Broadcast Industry Conclusion Remarks 2

3 Outline Introduction Simplified SDN Architecture SDN Applications SDN & Broadcast Industry Conclusion Remarks 3

4 Current network situation Complex and hard to manage Each network device must be configured separately data plane Line card Processor control plane Line card Networks are also vertically integrated Line card Switching Fabric Line card Line card Line card 4

5 The Two Networking Planes Control plane compute the state in routers, forwarding state Data plane processing and delivery of packets Base on local forwarding state Different planes require different abstractions 5

6 Data Plane Abstractions: Layers Applications built on Reliable (or unreliable) transport built on Best-effort global packet delivery built on Best-effort local packet delivery built on Local physical transfer of bits 6

7 Control Plane Abstractions Variety of goals: - Routing - Isolation - Traffic engineering -.. No modularity limited functionality mechanism without abstraction - Too many mechanisms, - Not enough functionality 7

8 Limitations of Current Networks Vertically Routing, integrated, management, complex, moblity closed, management, proprietary Networking industry with mainframe mind-set access control, VPNs, Feature OS Feature Millions of lines of source code 6,000 RFCs Custom Hardware Billions of gates Power Hungry 8

9 Why Was SDN Needed? Networks are hard to manage Networks are hard to evolve Networks design not based on formal principles Network QoS improvement 9

10 What SDN does Specialized Features Ap App p Ap p Ap p Ap p Ap p Ap p Ap p Open Interface Ap p Ap p Ap p Specialized Control Plane Control Plane or Control Plane Open Interface or Control Plane Specialized Hardware Merchant Switching Chips Vertically integrated Closed, proprietary Slow innovation Horizontal Open interfaces Rapid innovation SDN is an emerging networking approach Hope to eliminate the limitations of current networks 10

11 The network is changing Feature Feature Network OS Feature Feature OS Feature Feature Custom Hardware OS Feature Feature Custom Hardware OS Feature Feature Custom Hardware Feature Feature OS OS Custom Hardware Custom Hardware 11 11

12 Software Defined Network (SDN) 3. Consistent, up-to-date global network view Feature Feature Network OS 2. At least one Network OS probably many. Open- and closed-source 1. Open interface to packet forwarding Packet Forwarding Packet Forwarding Packet Forwarding Packet Forwarding Packet Forwarding 12

13 What SDN does cont 1. The control and data planes are decoupled. 2. Forwarding decisions are flow-based 3. Control logic is moved to an external entity 4. The network is programmable through software applications 13

14 A Short History of SDN 14

15 Outline Introduction Simplified SDN Architecture SDN Applications SDN & Broadcast Industry Conclusion Remarks 15

16 Simplified SDN Architecture 16

17 Simplified SDN Architecture Control Program A Control Program B Network OS Packet Forwarding Packet Forwarding Packet Forwarding Packet Forwarding Packet Forwarding 17

18 SDN Fundamental Abstractions forwarding Distribution specification 18

19 Network OS Modular system creates a consistent, up-to-date network view Runs on servers (controllers) Uses forwarding abstraction Get state information from forwarding elements Give control directives to forwarding elements 19

20 Control Program operates on view of network Input: global network view (graph/database) Output: configuration of each network device is not a distributed system Abstraction hides details of distributed state 20

21 Outline Introduction Simplified SDN Architecture SDN Applications SDN & Broadcast Industry Conclusion Remarks 21

22 SDN Applications Data centers and cloud environments Traffic Engineering Load Balancing Network Virtualization End to End QoS & QoE Mobility Management Measurement & Monitoring Network Security Green Networks e.g. 5G 22

23 SDN Applications - Network Virtualization App App App App App App Windows (OS) (OS) (OS) Linux Linux Linux Mac Mac Mac OS OS OS Controller Controller 11 Controller 1 Controller Controller Controller 22 2 Virtualization x86 (Computer) Virtualization (FlowVisor) OpenFlow Simple, stable, hardware substrate below, Programmability 23

24 SDN Applications End to End QoS & QoE Dynamic QoS-aware Over-The-Top video streaming SDN DASH 24

25 Outline Introduction Simplified SDN Architecture SDN Applications SDN & Broadcast Industry Conclusion Remarks 25

26 USECASE-1: Google Innovations in SDN Google Generates more than %25 of internet total traffic The Largest Part: Youtube OTT Service 26

27 USE CASE-2 : BT s SDN Broadcast Network BT s new SDN for BBC : Flexibility + Capex and Opex reduction This will enable the BBC to support more innovation and to explore emerging, data-hungry formats such as Ultra HD (4K) and 360 degree content. The network links all BBC UK sites and will also connect to the main overseas bureau and partners for playout of the BBC s TV channels. BT will demonstrate how multiple HD uncompressed video flows can be transported across a SDN through to a production studio via high-bandwidth network pipes. This will enable live footage to be captured remotely, allowing broadcasters the opportunity to cover events without needing to send multiple camera crews, potentially saving millions of pounds in the future as they look to move away from having studios on-site full of equipment. BT has also provided the UK s first uncompressed video contribution network connecting all 20 Premier League football stadiums 27

28 Outline Introduction Simplified SDN Architecture SDN Applications SDN & Broadcast Industry Conclusion Remarks 28

29 Conclusion Remarks SDX is a approach Per flow end to end QoS/QoE SDN : Inevitable Must for Media Technology 29

30 Any Questions? Thank You 30