Introduction To Openflow

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Presented in Orange France Telecom Research and Development team.

Introduction To Openflow

  1. 1. Introduction to OpenFlow MEULLE Michael, DAAR Waqas CORE-TPN-RIV 23 July 2010 recherche & développement
  2. 2. Outline  Background  Motivation  OpenFlow overview  OpenFlow Concept  OpenFlow protocol  OpenFlow Messages  How OpenFlow works?  Conclusion 2 recherche & développement
  3. 3. Background  Internet is closed for Innovations  We like to do new experiments  Mobility management  New naming/address schemes  Network access control  …… 3 recherche & développement
  4. 4. What is OpenFlow?  Put an open platform in hands of researchers/students to test new ideas at scale through production networks.  An open development environment for all researchers  Give access to flow tables in switches  lookup tables, access control list, etc..  Control packet forwarding in routers and switches. 4 recherche & développement
  5. 5. OpenFlow Architecture Figure 1: OpenFlow Architecute [1] 5 recherche & développement
  6. 6. OpenFlow Protocol Support three message types Controller   Controller-to-switch messages OpenFlow protocol • Configuring the switch • Exchanging switch capabilities • Managing the Flow table  Symmetric messages OpenFlow switch • Send in either direction • Diagnose problems in switch controller connection  Asynchronous messages • From switch to the controller • Announce change in network state, swtich state etc. 6 recherche & développement
  7. 7. OpenFlow Controller  Openflow controller is a centralized entity for the entire OpenFlow network.  NOX [4] is an open source OpenFlow controller.  simplified platform for writing network control software in C++/ Python.  Researchers can write a software and plugin to NOX for testing their idea. 7 recherche & développement
  8. 8. Packet processing in OpenFlow Network Figure 2: Processing of a packet in Openflow network [1] 8 recherche & développement
  9. 9. OpenFlow Table Entry Figure 3: OpenFlow Table Entry [2] 9 recherche & développement
  10. 10. OpenFlow switching mechanism Figure 4: Switching of packets in OpenFlow network [3] 10 recherche & développement
  11. 11. Conclusion  Test environment for future Internet technologies  Setup experiments at the flow level  Setup experiments at the packet level 11 recherche & développement
  12. 12. Reading Material  OpenFlow switch specification; URL: www.openflowswitch.org/documents/openflow-spec-v0.8.9.pdf  N McKeown; ‘OpenFlow: Enabling Innovation in Campus Networks’; URL: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.141.2269  Labsetup of Openflow network; URL: http://www.openflowswitch.org/foswiki/bin/view/OpenFlow/Deployment/HOWTO /LabSetup#4_Controller_Setup  NOX controller; URL: http://noxrepo.org/noxwiki/index.php/Main_Page 12 recherche & développement
  13. 13. References 1. Nick McKeown;“Clean state design for Internet”; URL: www.openflowswitch.org/documents/FOpenFlow.ppt&ei=K3xITN3cHIqOjAfo7Li0Dg&usg=AFQjCNGBQJM8 FlhrVJAF7iy_BcehOKkqqw&sig2=WFzjw1dzcG_Hwy3lxSMAZg 2. Peter Sjodin, Markus Heidell, Georgia Kontesidou, Kyriakos Zarifis, “Network virtualization based on flows” 3. HIDEyuki Shimonishi; „Virtualized Network Infrastructure using Openflow‟; 4. NOX; URL: http://noxrepo.org/wp/ 13 recherche & développement

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