openflow and software defined networks
DESCRIPTION
OpenFlow and Software Defined Networks. Outline. The history of OpenFlow What is OpenFlow? Slicing OpenFlow networks Software Defined Networks Industry interest. Original Question. How can researchers on college campuses test out new ideas in a real network, at scale?. Problem. - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: OpenFlow and Software Defined Networks](https://reader036.vdocuments.net/reader036/viewer/2022081506/5681431f550346895daf8632/html5/thumbnails/1.jpg)
OpenFlow and
Software Defined Networks
![Page 2: OpenFlow and Software Defined Networks](https://reader036.vdocuments.net/reader036/viewer/2022081506/5681431f550346895daf8632/html5/thumbnails/2.jpg)
Outline
o The history of OpenFlowo What is OpenFlow?o Slicing OpenFlow networkso Software Defined Networkso Industry interest
![Page 3: OpenFlow and Software Defined Networks](https://reader036.vdocuments.net/reader036/viewer/2022081506/5681431f550346895daf8632/html5/thumbnails/3.jpg)
Original Question
How can researchers on college campuses test out new ideas in a real network, at scale?
![Page 4: OpenFlow and Software Defined Networks](https://reader036.vdocuments.net/reader036/viewer/2022081506/5681431f550346895daf8632/html5/thumbnails/4.jpg)
ProblemMany good research ideas
on college campuses…
No way to test new ideas at scale, on real networks, with real user traffic
Many good research ideas on college campuses…
No way to test new ideas at scale, on real networks, with real user traffic
Consequence: Almost no technology transfer
Consequence: Almost no technology transfer
![Page 5: OpenFlow and Software Defined Networks](https://reader036.vdocuments.net/reader036/viewer/2022081506/5681431f550346895daf8632/html5/thumbnails/5.jpg)
Research problems
Well known problemsSecurity, mobility, availability
Well known problemsSecurity, mobility, availability
Incremental ideasFixing BGP, multicast, access control,
Mobile IP, data center networks.
Incremental ideasFixing BGP, multicast, access control,
Mobile IP, data center networks.
More radical changesEnergy management, VM mobility, …
More radical changesEnergy management, VM mobility, …
![Page 6: OpenFlow and Software Defined Networks](https://reader036.vdocuments.net/reader036/viewer/2022081506/5681431f550346895daf8632/html5/thumbnails/6.jpg)
How to build a test network with sufficient scale and realism?
![Page 7: OpenFlow and Software Defined Networks](https://reader036.vdocuments.net/reader036/viewer/2022081506/5681431f550346895daf8632/html5/thumbnails/7.jpg)
Software Router
PC
+Multi-Port NIC
Total capacity: Only ~5Gb/s
![Page 8: OpenFlow and Software Defined Networks](https://reader036.vdocuments.net/reader036/viewer/2022081506/5681431f550346895daf8632/html5/thumbnails/8.jpg)
• Difficult to develop, always behind industry
• Difficult to program, constrained environment
• Too expensive
Custom Hardware
![Page 9: OpenFlow and Software Defined Networks](https://reader036.vdocuments.net/reader036/viewer/2022081506/5681431f550346895daf8632/html5/thumbnails/9.jpg)
Million of linesof source code
6,000 RFCs
Billions of gates Bloated Power Hungry
Vertically integrated, complex, closed, proprietaryNot suitable for experimental ideas
Specialized Packet Forwarding Hardware
OperatingSystem
Feature Feature
Routing, management, mobility management, access control, VPNs, …
Modify Existing Equipment
![Page 10: OpenFlow and Software Defined Networks](https://reader036.vdocuments.net/reader036/viewer/2022081506/5681431f550346895daf8632/html5/thumbnails/10.jpg)
The only test network large enough to evaluate future Internet technologies
at scale, is the Internet itself.
![Page 11: OpenFlow and Software Defined Networks](https://reader036.vdocuments.net/reader036/viewer/2022081506/5681431f550346895daf8632/html5/thumbnails/11.jpg)
OpenFlow Protocol
Data Path (Hardware)
Control Path OpenFlow
ControllerController(Server Software)(Server Software)ControllerController
(Server Software)(Server Software)
AppApp AppApp AppApp
![Page 12: OpenFlow and Software Defined Networks](https://reader036.vdocuments.net/reader036/viewer/2022081506/5681431f550346895daf8632/html5/thumbnails/12.jpg)
Slicing traffic
All network traffic
Researchtraffic
Experiment #1
Experiment #2
…
Experiment N
![Page 13: OpenFlow and Software Defined Networks](https://reader036.vdocuments.net/reader036/viewer/2022081506/5681431f550346895daf8632/html5/thumbnails/13.jpg)
OpenFlow Basics
![Page 14: OpenFlow and Software Defined Networks](https://reader036.vdocuments.net/reader036/viewer/2022081506/5681431f550346895daf8632/html5/thumbnails/14.jpg)
Research Experiments
Step 1: Separate Control from Datapath
![Page 15: OpenFlow and Software Defined Networks](https://reader036.vdocuments.net/reader036/viewer/2022081506/5681431f550346895daf8632/html5/thumbnails/15.jpg)
Step 2: Cache flow decisions in datapath
“If header = x, send to port 4”
“If header = ?, send to me”“If header = y, overwrite header with z, send to ports 5,6”
FlowTableFlowTable
![Page 16: OpenFlow and Software Defined Networks](https://reader036.vdocuments.net/reader036/viewer/2022081506/5681431f550346895daf8632/html5/thumbnails/16.jpg)
Plumbing Primitives<Match, Action>
Match arbitrary bits in headers:
– Match on any header, or new header– Allows any flow granularity
Action– Forward to port(s), drop, send to controller– Overwrite header with mask, push or pop– Forward at specific bit-rate
16
HeaderHeader DataData
Match: 1000x01xx0101001x
![Page 17: OpenFlow and Software Defined Networks](https://reader036.vdocuments.net/reader036/viewer/2022081506/5681431f550346895daf8632/html5/thumbnails/17.jpg)
General Forwarding Abstraction
Small set of primitives“Forwarding instruction set”
Small set of primitives“Forwarding instruction set”
Protocol independentBackward compatibleProtocol independentBackward compatible
Switches, routers, WiFi APs, basestations, TDM/WDM
Switches, routers, WiFi APs, basestations, TDM/WDM
![Page 18: OpenFlow and Software Defined Networks](https://reader036.vdocuments.net/reader036/viewer/2022081506/5681431f550346895daf8632/html5/thumbnails/18.jpg)
Slicing an OpenFlow Network
![Page 19: OpenFlow and Software Defined Networks](https://reader036.vdocuments.net/reader036/viewer/2022081506/5681431f550346895daf8632/html5/thumbnails/19.jpg)
Ways to use slicing
Slice by featureSlice by user
Slice by featureSlice by user
Home-grown protocolsDownload new feature
Versioning
Home-grown protocolsDownload new feature
Versioning
![Page 20: OpenFlow and Software Defined Networks](https://reader036.vdocuments.net/reader036/viewer/2022081506/5681431f550346895daf8632/html5/thumbnails/20.jpg)
![Page 21: OpenFlow and Software Defined Networks](https://reader036.vdocuments.net/reader036/viewer/2022081506/5681431f550346895daf8632/html5/thumbnails/21.jpg)
Research Examples
(See openflow.org/Researchfor demo videos)
![Page 22: OpenFlow and Software Defined Networks](https://reader036.vdocuments.net/reader036/viewer/2022081506/5681431f550346895daf8632/html5/thumbnails/22.jpg)
Broader interest in an evolvable Internet
![Page 23: OpenFlow and Software Defined Networks](https://reader036.vdocuments.net/reader036/viewer/2022081506/5681431f550346895daf8632/html5/thumbnails/23.jpg)
Specialized Packet Forwarding Hardware
Feature Feature
Specialized Packet Forwarding Hardware
Specialized Packet Forwarding Hardware
Specialized Packet Forwarding Hardware
Specialized Packet Forwarding Hardware
OperatingSystem
OperatingSystem
OperatingSystem
OperatingSystem
OperatingSystem
Network OS
Feature Feature
Feature Feature
Feature Feature
Feature Feature
Feature Feature
Restructured Network
![Page 24: OpenFlow and Software Defined Networks](https://reader036.vdocuments.net/reader036/viewer/2022081506/5681431f550346895daf8632/html5/thumbnails/24.jpg)
Feature Feature
Network OS
1. Open interface to packet forwarding
3. Well-defined open API2. At least one Network OS
probably many.Open- and closed-source
Software-Defined Network
PacketForwarding
PacketForwarding
PacketForwarding
PacketForwarding
PacketForwarding
PacketForwarding
PacketForwarding
PacketForwarding
PacketForwarding
PacketForwarding
![Page 25: OpenFlow and Software Defined Networks](https://reader036.vdocuments.net/reader036/viewer/2022081506/5681431f550346895daf8632/html5/thumbnails/25.jpg)
Network OS
Research– NOX (C++/Python) http://noxrepo.org– Maestro (Rice University)– Helios (NEC)– Beacon (Java) coming soon. – Others in development
Commercial– ONIX [OSDI 2010, Google, Nicira, NEC]– Expect others
![Page 26: OpenFlow and Software Defined Networks](https://reader036.vdocuments.net/reader036/viewer/2022081506/5681431f550346895daf8632/html5/thumbnails/26.jpg)
Cellular industry
• Recently made transition to IP• Billions of mobile users• Need to securely extract payments and hold
users accountable
• IP sucks at both, yet hard to change
OpenFlow provides a way for the cellular industry to solve real problem plaguing their networks.
![Page 27: OpenFlow and Software Defined Networks](https://reader036.vdocuments.net/reader036/viewer/2022081506/5681431f550346895daf8632/html5/thumbnails/27.jpg)
Telco Operators
• Global IP traffic growing 40-50% per year• End-customer monthly bill remains unchanged• Therefore, CAPEX and OPEX need to reduce 40-
50% per Gb/s per year• But in practice, reduces by ~20% per year• And based on the same equipment as
competitors
OpenFlow allows telcos to reduce CAPEX, OPEX and toadd new differentiating features to their networks.
![Page 28: OpenFlow and Software Defined Networks](https://reader036.vdocuments.net/reader036/viewer/2022081506/5681431f550346895daf8632/html5/thumbnails/28.jpg)
Example: New Data Center
Cost200,000 serversFanout of 20 10,000 switches$5k vendor switch = $50M$1k commodity switch = $10M
Savings in 10 data centers = $400M
Control
More flexible controlTailor network for servicesQuickly improve and innovate
Data center companies have been the first to deploy OpenFlow in their networks.
![Page 29: OpenFlow and Software Defined Networks](https://reader036.vdocuments.net/reader036/viewer/2022081506/5681431f550346895daf8632/html5/thumbnails/29.jpg)
Next Steps
![Page 30: OpenFlow and Software Defined Networks](https://reader036.vdocuments.net/reader036/viewer/2022081506/5681431f550346895daf8632/html5/thumbnails/30.jpg)
OpenFlow Standardization
Version 1.0: Most widely used versionVersion 1.1: Released in February 2011.
OpenFlow transferred to ONF in March 2011.
![Page 31: OpenFlow and Software Defined Networks](https://reader036.vdocuments.net/reader036/viewer/2022081506/5681431f550346895daf8632/html5/thumbnails/31.jpg)
Thank you!