Openflow勉強会 「OpenFlowコントローラを取り巻く状況とその実装」
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OpenFlow is a communications protocol that gives access to the forwarding plane of a network switch or router over the network. It defines communications between controllers and switches. Controllers communicate with switches using OpenFlow messages to read, modify and write flow tables that determine how the switch forwards packets. Popular OpenFlow controllers include NOX, Beacon, Floodlight, Ryu and Trema. OpenFlow enables building software-defined networks and network virtualization.
Openflow勉強会 「OpenFlowコントローラを取り巻く状況とその実装」
- 1. OpenFlow (@oshothebig)
- 2. • • • • • , GMPLS, VLAN tag swapped Ethernet, , etc.
- 3. OpenFlow • Galibier OpenFlow Controller • https://github.com/oshothebig/galibier • • 300 Java OpenFlow (http://bit.ly/qXoMGM) • OpenFlow Java (http://bit.ly/pbI3Or)
- 4. OpenFlow Application Application Application Controller OpenFlow Switch Switch Switch Switch
- 5. OpenFlow • NEC UNIVERGE PF5240/ PF5820 • Reference • Pronto Systems Implementation 3240/3290 • Open vSwitch • IBM RackSwitch G8264 • HP 3500/5400/8200
- 6. OpenFlow NOX NEC Trema Nicira Networks Beacon/Floodlight Big Switch Networks Ryu Midokura NodeFlow NTT Data etc. etc.
- 7. NOX • http://noxrepo.org/ • GPL v3 • Nicira Networks • C++/Python • • • • 2011/1/1 53
- 8. Trema • https://github.com/trema/trema • GPL v2 • NEC • C/Ruby • • 1 PC •
- 9. Beacon/Floodlight • http://www.beaconcontroller.net/ (Beacon) http:// oodlight.open owhub.org/ (Floodlight) Beacon Floodlight GPL v2 Apache License Version 2.0 Java David Erickson (Stanford) Big Switch Networks • IO 600 Flow req/sec @4 (Beacon)
- 10. Ryu • http://www.osrg.net/ryu/ • GPL v3 • NTT( ?) VA Linux • Pure Python • OpenStack
- 11. NodeFlow • http://github.com/gaberger/NodeFLow • MIT Licenes • Gary Berger • JavaScript (for Node.js)
- 13. Trema NEC UNIVERGE PF Big Switch Floodlight BigController? NOX Nicira NVP?
- 14. Floodlight • 12 https://github.com/ oodlight/ oodlight • Beacon • • OSGi • Netty • →T
- 15. Floodlight • 12 https://github.com/ oodlight/ oodlight • Beacon • • OSGi • Netty • →T
- 16. Nicira Networks • 2 (by Publickey) http://www.publickey1.jp/blog/11/nicira_networks.html • NTT http://www.ntt.co.jp/news2011/1108/110802a.html • Nicira Virtualization Platform (NVP) http://cn.teldevice.co.jp/product/nicira/nicira_nvp/ index.html
- 17. Onix • OSDI’10 Onix: A Distributed Control Platform for Large-scale Production Networks http://www.usenix.org/event/osdi10/tech/full_papers/ Koponen.pdf • Nicira Networks, Google, NEC, UC Berkeley • • Zookeeper • 15 C++
- 18. Onix Server 1 Server N Network Control Logic Network Control Logic NIB NIB Onix Switch Import / Export Distribution I / E Distribution I / E Switch Import / Export Management Connectivity Network Infrastructure Managed Physical Network Infrastructure Figure 1: There are four components in an Onix controlled network: managed physical infrastructure, connectivity
- 19. Onix • Network Information Base (NIB) • Forwarding 1 n Forwarding Category Host Link Table Engine Query Create, dest 1 2 Network Node 1 n Port Access attri Notification Figure 2: The default network entity classes provided by Synchronize • Onix’s API. Solid lines represent inheritance,DB dashed lines while Configuratio correspond to referential relation between entity instances. The • Transactionalthe dashed linesdatabase numbers on persistent show the quantitative mapping relationship (e.g., one Link maps to two Ports, and two Pull • One-hop, can map to the same Link). Nodes, ports and links DHT Ports eventually-consistent, memory-only constitute the network topology. All entity classes inherit the same base class providing generic key-value pair access. Table 1: Fu
- 20. OpenFlow
- 21. • • • •
- 22. • Symmetric Message • Hello, Echo, , • Controller/Switch Message • , , • Async Message • Packet in, ,
- 23. Header ver. type length xid payload 22 • length (2 bytes) • Netty LengthFieldBasedFrameDecoder • Floodlight
- 24. Floodlight ChannelPipeline Controller OFChannelHandler OpenFlow OFMessageEncoder OFMessageDecoder Netty Internal I/O Threads
- 25. Switch Controller
- 26. Switch Controller
- 27. Switch Controller HELLO HELLO
- 28. Switch Controller HELLO HELLO FEATURE_REQUEST FEATURE_REPLY
- 29. Switch Controller
- 30. Switch Controller ECHO_REQUEST ECHO_REPLY
- 31. Switch Controller ECHO_REQUEST ECHO_REPLY ECHO_REQUEST ECHO_REPLY
- 32. Controller.java ( OFChannelHandler) protected void processOFMessage(OFMessage m) throws IOException, SwitchStateException { switch (m.getType()) { case HELLO: .... case ECHO_REQUEST: .... case FEATURES_REPLY: .... default: .... } ※ Trema src/switch_manager/ofpmsg_recv.c: ofpmsg_recv()
- 33. Switch Controller
- 34. Switch Controller
- 35. Switch Controller PACKET_IN
- 36. Switch Controller PACKET_IN PACKET_OUT or FLOW_MOD
- 37. Controller.java protected void handleMessage( IOFSwitch sw, OFMessage m, FloodlightContext bContext) { switch (m.getType()) { case PACKET_IN: .... default: .... } default
- 38. OpenFlow • OpenFlow 1.1 • 1.0 • Ver. 1.1 • Ver. 1.1 • • Ver. 1.2 •
- 39. • OpenFlow • • OpenFlow • Floodlight
- 40. • Open vSwitch