1. OpenFlow
(osho@galibier.org)
@oshothebig

2. •
• OpenFlow
• OpenFlow
•
•
•

3. • (Twitter: oshothebig)
•
•
•
• , GMPLS, VLAN Tag Swapped
Ethernet, , etc.

4. OpenFlow
• 4, 5
• Galibier OpenFlow Controller
•
• 300 Java OpenFlow
(http://bit.ly/qXoMGM)
• OpenFlow Java
(http://bit.ly/pbI3Or)

5. OpenFlow
• NOX (Nicira)
• Trema (NEC)
• Beacon (David Erickson, Stanford University)
• Floodlight (BigSwitch Networks?)
• Maestro (Rice University)
• Nettle (Yale University)

6. NOX
• Nicira Networks
• http://noxrepo.org/
• C++/Python
• GPLv3
•

7. Trema
• NEC
• https://github.com/trema/trema
• C/Ruby
• GPLv2
•
•

8. Beacon
• David Erickson (Stanford University)
• http://www.beaconcontroller.net/
• Java
• GPL v2 and the Stanford University FOSS License
Exception v1.0
• , Web
• 2011/9/12 Ver. 1.0.0

9. Floodlight
• Big Switch Networks?
• http://www.openflowhub.org/display/Floodlight/
Floodlight+is+a+Java-based+OpenFlow+Controller
• Java
• Apache License
• git://github.com/bigswitch/floodlight.git
•

10. Beacon Floodlight
• Floodlight Beacon
• OSS OSGi
• Big Switch Networks
• git://github.com/bigswitch/BeaconMirror.git ( )
• git://github.com/bigswitch/floodlight.git

11. Maestro
• Rice University
• http://code.google.com/p/maestro-platform/
• Java
• LGPL v2.1
• DAG

12. Nettle
• Yale University
• http://haskell.cs.yale.edu/?page_id=376
• Haskell
• BSD3
• Nettle: Functional Reactive Programming of OpenFlow
Networks
http://haskell.cs.yale.edu/wp-content/uploads/2011/03/
NettlePADL2011.pdf

13. OpenFlow

14. Applicatioin Application
API
Controller
OpenFlow
Open vSwitch Switch

15. OpenFlow
• Ver. 1.0.0
http://www.openflow.org/documents/openflow-spec-
v1.0.0.pdf
Header
ver. type length xid payload
22

16. • Symmetric Message
• Hello, Echo, ,
• Controller/Switch Message
• , ,
• Async Message
• Packet in, ,

17. Switch Controller

18. Switch Controller

19. Switch Controller
HELLO
HELLO

20. Switch Controller
HELLO
HELLO
FEATURE_REQUEST
FEATURE_REPLY

21. Switch Controller

22. Switch Controller
ECHO_REQUEST
ECHO_REPLY

23. Switch Controller
ECHO_REQUEST
ECHO_REPLY
ECHO_REQUEST
ECHO_REPLY

24. Switch Controller

25. Switch Controller

26. Switch Controller
PACKET_IN

27. Switch Controller
PACKET_IN
PACKET_OUT or FLOW_MOD

28. Galibier OpenFlow Controller
•
• Mac
• Java
• OpenFlow : openflowj
• IO: Netty
• http://github.com/oshothebig/galibier

30. •
•
• API

31. Header
ver. type length xid payload
22
• length (2 bytes)
• LengthFieldBasedFrameDecoder

32. Controller
ChannelPipeline
OpenFlowControllerHandler OpenFlow
OpenFlowEncoder
OpenFlowDecoder
LengthFieldBasedFrameDecoder
Netty Internal I/O Threads

33. OpenFlow
• → HELLO
• HELLO → FEATURE_REQUEST
• FEATURE_REPLY →
• ECHO_REQUEST → ECHO_REPLY
• ECHO_REQUEST

34. HELLO
private void handleHello(OFHello in) {
send(factory.getMessage(OFType.FEATURES_REQUEST));
}

35. API
• switchConnected(Switch sw)
• switchDisconnected(Switch sw)
• handlePacketIn(Switch sw, OFPacketIn msg)
• handleFlowRemoved(Switch sw, OFFlowRemoved msg)
• handlePortStatus(Switch sw, OFPortStatus msg)

36. Controller Performance ?
http://www.openflow.org/wk/index.php/
Controller_Performance_Comparisons

37. Benchmark for controller
• Cbench
http://www.openflow.org/wk/index.php/Oflops
Cbench Controller

38. Benchmark for controller
• Cbench
http://www.openflow.org/wk/index.php/Oflops
Cbench Controller
PACKET_IN
PACKET_OUT

39. Benchmark for controller
• Cbench
http://www.openflow.org/wk/index.php/Oflops
Cbench Controller
PACKET_IN
PACKET_OUT
PACKET_IN
PACKET_OUT

40. ChannelPipeline
OpenFlowBenchmarkHandler
OpenFlowEncoder
OpenFlowDecoder
LengthFieldBasedFrameDecoder
Netty Internal I/O Threads

41. •
• OpenFlow
• Open vSwitch
•
• API

42. •
•
• OpenFlow
• Logically centralized

43. 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
•

44. 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

45. 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
numbers on the dashed lines show the quantitative mapping
• Transactional(e.g., one Linkdatabase Ports, and two
relationship persistent maps to two Pull
Ports can map to the same Link). Nodes, ports and links
• One-hop, eventually-consistent, memory-only DHT
constitute the network topology. All entity classes inherit the
same base class providing generic key-value pair access. Table 1: Fu

46. OpenFlow
•
• OpenFlow
• OpenFlow
•
• API
• =OS

47. • OpenFlow
• OpenFlow
• OpenFlow
• Onix
•

48. Thank you!
osho@galibier.org