OpenFlow Beyond the Data Centre at IP Expo

Jörg-Peter ElbersADVAnced TechnologyIP Expo, London, Oct 2012

Expanding OpenFlowBeyond the Data Centre

© 2012 ADVA Optical Networking. All rights reserved. Confidential.22

Outline

• Software Defined Networks & OpenFlow

• Optical Domain Extensions and Applications

• Summary


SDN & OpenFlow in a Nutshell


Software Defined Networking (SDN)

Data Plane

Network OS

App App App App

Virtual Network Slices

API

API

API

End

-use

r valu

e c

reati

on SDN enables

new networking

paradigms

through flexibility,

agility, and

programmability.


• Deterministic behaviour, predictable performance, rapid convergence

• Simplified planning, global optimization, off-line analysis

• Secure multi-tenancy & infrastructure sharing

• Better machine & service mobility

• Application-driven networking

Network programmability

HW abstraction and virtualization

Centralized management & control

Flow oriented data plane

SDN Principles & Benefits

Separation of data and control plane

Key SDN innovations: virtualization and application-level programmability.Key SDN innovations: virtualization and application-level programmability.


User Expectations

More efficient network, faster service delivery & lower hardware costs.More efficient network, faster service delivery & lower hardware costs.


OpenFlow in a Nutshell

The most prominent protocol for Open Source SDN implementations. The most prominent protocol for Open Source SDN implementations.

https://www.opennetworking.org/index.php

http://www.stanford.edu/


Early SDN/OpenFlow Adopters

Research & campus networks Web 2.0 Data centers


SDN Inside The Data Center

VirtualserverVirtualserverVirtual

networkVirtual

network

VirtualstorageVirtualstorage

Orchestration of IT & network resourcesOrchestration of IT & network resources

Storage pool Fabric interconnect Server pool

SDN adds missing piece to the virtualization puzzle: Network virtualization.SDN adds missing piece to the virtualization puzzle: Network virtualization.


SDN Beyond The Data Center

• Extend SDN into the optical domain

• Provide low-latency/high capacity

• Hide optical layer complexity

Packet-based Cloud Access2Optical Cloud Connectivity1

• Extend SDN to access & backhauling

• Manage QoE with constrained capacity

• Allow content/service-aware optimization

Programmable connectivity for data center & carrier infrastructure

Optical network

Carrier Ethernetaccess


Optical OpenFlow


• Allow flexible resource pooling on a global scale

• New applications • Follow the sun/dark• Load balancing• Bandwidth calendaring• Bulk transfers

• Optical SDN for low latency/high capacity

• But: Optical brings new challenges to SDN

SDN for Cloud Connectivity

Optical OpenFlow requires extensions on protocol & architecture level.Optical OpenFlow requires extensions on protocol & architecture level.


Circuit Switching with OpenFlow

13

Circuit Flows Out Port

Out Lambda

StartingTime-Slot

Signal Type VCG13 In

Port In

Lambda Starting

Time-Slot Signal Type VCG

Circuit Switching Extensions

Good for electrical switches, but limited support for optical wavelength switching.Good for electrical switches, but limited support for optical wavelength switching.

https://www.opennetworking.org/index.php


Optical OpenFlow Extensions

C

Any λ

λ Block

WS

S

WS

S

WSS

WSS

λ1λ2λ3

TX

WSS1

:N W

SS

1:N WSS

1:N

WS

S

1:N WSS

1:N WSS

Connectivity & Topology DiscoverySignal Mapping & Format Compatibility

Optical Node Model:Wavelenth Continuity &

Dynamic Switching Constraints

Optical Performance ConstraintsSequential Lightpath Setup/Teardown

Optical Power Balancing

OpenFlow Support for FSP 3000 ROADM platform

Optical extensions required to deal with the analogue nature of the optical layer. Optical extensions required to deal with the analogue nature of the optical layer.

OSC(Out-of-band)


Optical OpenFlow Modes

• Flat Network Mode

• Optical network exposed to OpenFlow controller

• OpenFlow controller with circuit & optical extensions

• One OpenFlow agent per network element

• Optical layer control as OF controller app

• Encapsulated Optical Network Mode (aka Fat Switch Mode)

• Optical network abstracted as virtual switch

• Plain packet-based OpenFlow controller

• Single OpenFlow agent per optical domain

• Optical layer control by established technologies

Compromises possible between hiding optical complexity and exposing topology.


VisualizationFacility

High CapacityROADM Network

End-User

Orchestration of IT & Networking Resources

by Controller App

(3) Reserve Resources(2) Submit Request including

User Context(1) Publish Service and

Infrastructure Information

Request

PathComputation

configure server

Streaming Server

First Optical OpenFlow DemonstrationPacket over Wavelength-Switched ROADM Network

Joint demo with Uni Essex(NOW: BRISTOL UNIVERSITY)@ Future Internet Assembly,Aalborg, May 10-11, 2012


First International DemonstrationMulti-Domain & Multi-Technology Packet over Fixed/Flexi Grid

See ECOC‘12 Postdeadline Paper Th.3.D.2


Use Case Analysis: Cloud DatacenterCapacity savings by flexible network resource allocation

Uniform node-to-node traffic

> 30% node capacity savings from shared model if excess traffic > base traffic.

0%

10%

20%

30%

40%

50%

60%

70%

80%

90%

100%

00:0

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Net

wor

k Util

izati

on

Time

basetraffic

excesstraffic

0%10%20%30%40%50%60%70%80%

Nod

e ca

paci

ty s

avui

ngs

Excess traffic / base traffic

Shared vs. dedicated resource model

N = 4

N = 8

N node ring

Dedicated node resources for base trafficModel a): dedicated resources for excess trafficModel b): shared resources for excess traffic


Summary


Summary & Conclusions

• SDN brings programmability and

virtualization to the networking world

• OF is the most prominent open-source

SDN protocol today

• Extensions allow OF-controlled

optical cloud connectivity

• Prospects: more network efficiency and faster service delivery

• SDN & Openflow are still at the beginning of its life cycle …

… and require ongoing development

OpenFlow

Source: Gartner technology hype cycle,adapted from Wikipedia

[email protected]

Thank you

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Copyright © for the entire content of this presentation: ADVA Optical Networking.

© 2012 ADVA Optical Networking. All rights reserved. Confidential.2222tu-berlin.de ibbt.be ethz.ch telekom.com eict.de i2cat.cat nec.com essex.ac.uk advaoptical.com stanford.edu

Eight Interconnected OpenFlow Islands

OFELIA

• Project partners: EICT, DTAG, UESSEX, I2CAT, TUB, NEC, IBBT, ETH Zürich, ADVA, STANFORD

• Duration: Sep. 2010 – Aug. 2013 (36 months)

• Provide a unique experimental facility based on OpenFlow

• Control the network itself – precisely and dynamically

• Allows virtualizing and controlling the network environment

through secure and standardized interfaces

• Allows for Experimentation on multi-layer and multi-technology

networks – Program your own cloud network!

• Islands publicly available for experiments

• OFELIA belongs to the second wave of FIRE projects under FP7

EU FP7 OFELIA OpenFlow in Europe - Linking Infrastructure and Applications

More information at: http://www.fp7-ofelia.eu

UEssex Island equipped with ADVA ROADMs

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