Innovation in Campus Networks Through OpenFlow Technology

OpenFlow technology pioneered by researchers from top universities facilitates innovation in campus networks by providing an open platform for testing new ideas on production networks. It addresses the limitations of existing solutions, enabling researchers to bring the future Internet to legacy systems. The concept involves a software-defined network architecture with a flow table structure that allows for improved network control and scalability.

• Innovation
• Campus Networks
• OpenFlow Technology
• Software-Defined Networking
• Network Architecture

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1. OpenFlow: Enabling Innovation in Campus Networks ACM SIGCOMM Computer Communication Review 2008 Nick McKeown Tom Anderson Hari Balakrishnan Stanford University University of Washington MIT Guru Parulkar Larry Peterson Jennifer Rexford Stanford University Princeton University Princeton University Scott Shenker Jonathan Turner University of California, Berkeley Washington University in St. Louis 101064541 2013/5/30

2. Outlines Introduction and Motivation OpenFlow Goal Concepts Network Architecture Flow Table Structure Controller More Examples Conclusion 2013/5/30 1/14

3. Introduction and Motivation Experiments we d like to do Mobility Management New Naming/Addressing Schemes Network Access Control If we design our own prototypes Closed network No way to test the prototypes 2013/5/30 2/14

4. Introduction and Motivation Why Internet is closed for innovations? Commercial vendor won t open software and hardware development environment Complexity to support Market protection & Barrier-to-entry for competitors Existing Solutions Software only Performance is not good Hardware/Software Fanout too small 2013/5/30 3/14

5. OpenFlow Goal Open Platform For researchers to test new ideas at scale production networks Without requiring vendors to expose internal workings Bring future Internet to legacy Internet 2013/5/30 4/14

6. OpenFlows Concept OpenFlow Controller OpenFlow Protocol (SSL) Ethernet Switch Software Control Plane Control Plane OpenFlow Hardware Hardware Data Plane Data Plane 2013/5/30 5/14

7. OpenFlow Network Architecture OpenFlow Switch specification OpenFlow-enable Commercial Switch PC Normal Software Secure Channel OpenFlow Controller SW Normal Datapath Flow Table HW 2013/5/30 6/14

8. OpenFlow Flow Table Structure OpenFlow Switch Normal Software Secure Channel SW Rule Action Statistics Normal Datapath Flow Table HW Packet + byte counters 1. Forward packet to port(s) 2. Encapsulate and forward to controller 3. Drop packet 4. Send to normal processing pipeline Switch Port MAC src MAC dst Eth type VLAN ID IP Src IP Dst IP TCP sport TCP dport Prot 2013/5/30 7/14

9. OpenFlow Flow Table Structure OpenFlow Switch Normal Software Secure Channel SW Rule Action Statistics Normal Datapath Flow Table HW Packet + byte counters 1. Forward packet to port(s) 2. Encapsulate and forward to controller 3. Drop packet 4. Send to normal processing pipeline Switch Port MAC src MAC dst Eth type VLAN ID IP Src IP Dst IP TCP sport TCP dport Prot 2013/5/30 7/14

10. OpenFlow Flow Table Example Ethernet Switching Switch Port src * * 00:2D.. * * * * * * * Port5 MAC MAC dst Eth type VLAN ID IP Src IP Dst IP TCP sport TCP dport Action Prot IP Routing Switch Port * MAC src * MAC dst * * * * Eth type VLAN ID IP Src IP Dst IP TCP sport TCP dport Action Prot 140.114.. * * * Port3 Application Firewall Switch Port src * * MAC MAC dst * * * * * * * 22 Drop Eth type VLAN ID IP Src IP Dst IP TCP sport TCP dport Action Prot 2013/5/30 8/14

11. OpenFlow Controller Centralized intelligential agency Allow multiple researchers create their accounts to control the flows independently Add or remove flow-entries NOX is an open-source OpenFlow Controller NOX Controller OpenFlow Switch OpenFlow Switch OpenFlow Switch 2013/5/30 9/14

12. Secure Channel SSL Connection Controller discovery protocol Encapsulate packets for controller Send link/port state to controller 2013/5/30 10/14

13. OpenFlow Operation Example Amy Access Control Scheme! Rules Rules Rules Rules Flow Table OpenFlow Switch PC Controller Flow Table OpenFlow Switch OpenFlow Switch Flow Table Flow Table OpenFlow Switch 2013/5/30 11/14

14. OpenFlow Operation Example Amy Access Control Scheme! If Rule = x, send to port 4 If Rule = y, drop it If Rule = ?, send to controller Else, send to normal pipeline Amy Flow Table OpenFlow Switch PC Controller Flow Table OpenFlow Switch OpenFlow Switch Flow Table Flow Table OpenFlow Switch 2013/5/30 11/14

15. OpenFlow Operation Example Amy Access Control Scheme! If Rule = x, send to port 4 If Rule = y, drop it If Rule = ?, send to controller Else, send to normal pipeline Amy Flow Table OpenFlow Switch PC Controller Flow Table OpenFlow Switch OpenFlow Switch Flow Table Flow Table OpenFlow Switch 2013/5/30 11/14

16. OpenFlow Operation Example Amy Access Control Scheme! If Rule = x, send to port 4 If Rule = y, drop it If Rule = ?, send to controller Else, send to normal pipeline Amy Flow Table OpenFlow Switch PC Controller Flow Table OpenFlow Switch OpenFlow Switch Flow Table Flow Table OpenFlow Switch 2013/5/30 11/14

17. OpenFlow Operation Example Amy Access Control Scheme! If Rule = x, send to port 4 If Rule = y, drop it If Rule = ?, send to controller Else, send to normal pipeline Amy Flow Table OpenFlow Switch PC Controller Flow Table OpenFlow Switch OpenFlow Switch Flow Table Flow Table OpenFlow Switch 2013/5/30 11/14

18. OpenFlow Operation Example Amy Access Control Scheme! If Rule = x, send to port 4 If Rule = y, drop it If Rule = ?, send to controller Else, send to normal pipeline Amy Flow Table OpenFlow Switch PC Controller Flow Table OpenFlow Switch OpenFlow Switch Flow Table Flow Table OpenFlow Switch 2013/5/30 11/14

19. OpenFlow Operation Example Amy Access Control Scheme! If Rule = x, send to port 4 If Rule = y, drop it If Rule = ?, send to controller Else, send to normal pipeline Amy Flow Table OpenFlow Switch PC Controller Flow Table OpenFlow Switch OpenFlow Switch Flow Table Flow Table OpenFlow Switch 2013/5/30 11/14

20. OpenFlow Operation Example Amy Access Control Scheme! If Rule = x, send to port 4 If Rule = y, drop it If Rule = ?, send to controller Else, send to normal pipeline Bob Flow Table OpenFlow Switch PC Controller Flow Table OpenFlow Switch OpenFlow Switch Flow Table Flow Table OpenFlow Switch 2013/5/30 11/14

21. OpenFlow Operation Example Amy Access Control Scheme! If Rule = x, send to port 4 If Rule = y, drop it If Rule = ?, send to controller Else, send to normal pipeline Bob Flow Table O-Flow Table OpenFlow Switch PC Controller Flow Table OpenFlow Switch OpenFlow Switch Flow Table Flow Table OpenFlow Switch 2013/5/30 11/14

22. More Examples for OpenFlow Switch Port MAC src MAC dst Eth type VLAN ID IP Src IP Dst IP TCP sport TCP dport Action Prot Network Management and Access Control Ex: Phones can only use HTTP service VLANs Mobile wireless VoIP clients Allowing seamless handover Non-IP network OpenFlow packets could be any kinds of formats Processing packets rather than flows 2013/5/30 12/14

23. OpenFlow Products NEC HP Pronto 2013/5/30 23 13/14

24. Conclusion OpenFlow Standard way to control flow-tables in commercial switches and routers An open development environment for all researchers Real environment for Future Internet Technologies 2013/5/30 14/14