Networks·Services·Peoplewww.geant.org
GuyRoberts
SeniorNetworkArchitectGÉANT27Sept2017
OpeningupOpticalNetworkingTIPandmerchantoptics
Networks·Services·Peoplewww.geant.org
• OpenLineSystemsandDCIequipment• TelecomInfraProject• TIPopticalsimulationsoftware- OLE• DCIequipmentevaluationandfieldtrials• NetworkdesignusingDCI
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Overview
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Contentprovidersareexperiencinghugegrowthintrafficvolume.Theyaredrivinginnovationtoensurethattheirbusinessmodelsscale.
• Theneedforsimplecentralizedcontrollersisdrivingsoftwareandhardwaredisaggregation.
• StartedwithOpenFlow,nowcontentprovidersarepushingdisruptionthroughmechanismssuchasTIP,OpenConfig etc.
• Hardwarecommoditisationdriveseconomiesofscale– pizzaboxformfactorfordatacentres.
• ThesechangesarenowmovingfromthedatacentreintotheWideAreaNetwork.
• ThiswillleadtobothopportunitiesandcompetitivepricepressuresonNRENs.
Whatchallenges/opportunitiesarethereforNRENsinthesechanges?
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Contentprovidersdrivingdisruption
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R&ENetworkeconomics- costofdeliveringdata
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• GÉANTfundsspentonbuildingournetworkhavefallensince2013.• AnnualisedcostofGÉANTnetworkexcludingmanpowernow€16.6M.• TotalGÉANTnetworktrafficincreasefrom250to400Gbps from2015to2016.• FallingpriceofcommercialInternet…weneedkeepuporloseout.Weneednewsolutionstokeepdeliveringrapidtrafficgrowthwithnoextrarevenue
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• TraditionallyDWDMopticalinterfacesresideontheopticalequipmentvendorstransponders
• ThenewgenerationofDWDMinterfacesarebeingintegratedinmanyplaces:• DWDMDP-QPSK/8QAM/16QAM• 2500kmreachinCFP2package• 4000kmreachinforAC400
• WhereisoptimallocationforCFP2?• Juniper/Ciscowouldliketosell100GDWDMontheirrouters• HeavyreadingwhitepaperFeb2017suggeststhatexternaltransponders/muxponders arecheaperduetocheapQSFP100GinterfacesandhighercostofusingDWDMonroutersconsumingvaluablerouterslots.
• IntegrationofDWDMintoroutersblurslayerindependenceandHeavyReadingclaimsthatbigcontentprovidersareoptingtokeepDWDMofftheirrouters.
DCIsolutionbringsgainsoflowcostDWDMwhilemaintaininglayerseparation
MerchantOptics
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AlienWaves
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• Alienwavesallowtranspondersfrommultiplevendorstooperateonasinglelinesystem.• Integrated3rdpartyDWDMpluggables availableinvariousterminaltechnologiesandvendors.• Stillbenefitfromasinglevendorprovidingend-to-endopticalmanagement:Channel&spanequalization,DCNconnectivity(OSC),ALS,Alarmreporting.
OpenLineSystem
ILAROADM ROADMILA
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• Nextgenofcommoditypluggableopticshas excellent performance• Datacentrestyle1RUstackableformfactor.• Upto6timesreductionincostovertraditionaltelecomsequipmentarchitectures
• Significantincreaseindensity andreductioninpowerconsumption• Modular– easytoscaleup• Easyupgradepathtonewtechnology
DataCentreInterconnects
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• Lossofequipmentintegrity– notdesignedtobehighlyavailableasperETSIetc.• Nointernalhardwareredundancy• Noin-serviceupgrades• Restrictedtemperatureoperation
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TelecomInfraProject
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• Facebookhasinitiatedthe TelecomInfraProject whichaimstoachieveopenmarketfornetworkingequipment.
• Builtaroundcomponents:APIs,lineequipment,subsystems,software.
• Operatorsaretheleaders,viathe'OperatorCouncil'(OC).
• Thesub-projectrelevanttoopticaltransmissionisOpenOpticalPacketTransport(OOPT)
• Facebookbelievesthatthedaysofthebigcarriergraderouterareover. Thenewarchitecturewillbestackableboxesandcoderstoreplacehardwareredundancy.
• TIPalsoplanstodevelopphotonicsimulationenvironmenttospeedupthedevelopment.
TelecomInfraProject
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Voyagerhardware
12 QSFP28 PortsBMC Console
System LEDs
Reset Button
OOB Management USB 2.0, Type A
4 Optical Ports
Debug Connector
• 12portsof100GQSFP28• 4 portsDWDMAcaciaAC400modulatedat
QPSK/8QAM/16QAM• 2xBroadcomTomahawkchipsetsof400Geach• Snaproute softwareforL2enterpriseswitching
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TIPOpenLinkEmulator(OLE)simulationtool
• TheOpenLinkEmulator(OLE)emulatesapoint-to-pointlinkwithinanetwork.• simulatesfiberattenuationandNLI• AmplifiergainandASEnoise• Passivecomponentslosses
• Theopticallinkemulator(OLE)basedongithubgaussiannoise(GNPY).
• TargetOSNRaccuracy1dB.
• Phase1pythoncodeavailablenowingithubfortesting.Nextcodeversionlate2017.
Phase1availablenow Phase2end2017
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Phase1• Distanceupto1500kmwithout3Rregeneration• Linearstructurewith5ROADMtotraverse(+2terminalAWG)• G.652xor G.655fibertype• Anyvariationofspanlength40-120km• EDFAamplifier
Phase2• AddutilitiestointerfacewithcodeoutsideTIPtoprovideGUIsupport• Improvesimulationcapabilities:RAMAN,optimumpowersettings• ImproveNetworkmodelingcapabilities
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OLEphase1and2
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Inputparameters
• Fibreattn.,length,alpha,beta,effectivearea• Amplifiergain,tiltandnoisefigure
• Opticalsignal
Outputparameters
• Opticalsignaltonoiseratio(OSNR)bothlinearandnon-linear
• Opticalnoise(ASE)
• NLINonlinearinterference• PhotonicSpectralDensity(PSD)
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OLEparameters
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• Essentialasaplanningtooltounderstandhowaddingnewwaveswillaffectexistingwavelengths.
• Vendorsprovideopticalmodellingtoolsbutthesearesinglevendoronly.TIPaimstomakemulti-vendoroperationeasywithasharedsimulationtool.
• Modellingtoolsareoftenexpensive.Morethan100,000Euros.
• Scalingupalienwavesrequiresareliablepredictionofperformanceofnewwavelengths.
• WhenROADMsareusedOSNRpredictionsareneededtoallowrestorationdecisiontobemadeon-the-go.
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Whyismodellingtoolimportant?
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GÉANTtesting
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DCIequipmenttestinginGÉANT
Optics FirstVendor SecondVendor
AcaciaAC400 Equipment:FacebookVoyagerStatus: Cambridgelabtestingcomplete
GÉANTfieldtrialLon-Bru completeNREN evaluationbyPSNCandUNINETTongoing
Equipment:ADVAFSP3000Status: Testingunderconsideration.
AcaciaCFP2 ACO Equipment:JuniperDWDMCFP2100GACOStatus: Cambridgelabtestingcomplete
GÉANTfieldtrialMil-Marcomplete
Equipment:CoriantGrooveG30Status: LabtestinginCambridgecomplete
AcaciaCFP2DCO Equipment:VendorinDWDMstealthmodeStatus: GÉANTfield trialonMil-Marcomplete
Equipment:JuniperDWDMCFP2100GDCOStatus: Testingexpected late2017
InfineraPIC Equipment:InfineraXT3300/XT3600Status: EvaluationinInfinera labinQ42017.
NA
Ciena WaveServer Equipment:WaveServer AIStatus: Cambridgelabtestingongoing
Fieldtrialplannedon CESNETfibrefromPraguetoViennainQ42017
NA
GÉANTistestingDCIboxesfromseveralvendors.InadditiontestsarebeingcarriedoutincollaborationwithNRENsthrough JRA1T1Astheseareeffectivelytranspondersinadatacentreform-factorthesehavebeengroupedbylinesideopticstypes.
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• InfinerafixedfiltersareoffsetfromITU-Tgrid
• -12.5GHz
• RequiresDCItotuneoffgrid• ThisissupportedbyAcaciapluggables
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InfineraDTN-Xfixedfilters
8
8.2
8.4
8.6
8.8
9
9.2
9.4
9.6
9.8
10
-20000 -18000 -16000 -14000 -12000 -10000 -8000 -6000 -4000 -2000 0
Q-factorvs.frequencyoffset(16QAM)
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VoyagerTx powervspre-FECBER(Labtest)
Labtestresults
• Testedover100kmoffibrelitwithInfineraDTN-X
• Infinera’s fixedfilterscentrefrequencyisoffsetfromtheITU-Tgridby12.5GHz
• Togetoptimalperformancewavelengthneedstobede-tuned
• ForQP-DPSKthesystemcanworkwithoutde-tuning,butseveraldBofperformancepenalty.
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CORIANTGroove(labtest)maximumpre-FECBERvsTx outputpower
*TestsbyKarimBoudjemaa
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16QAM
8QAM
QPSK
AllGÉANTfibreroutes– modulationschemeavailable
• Ofthe21fibreroutesinGÉANT,wecanexpectthatmostwillworkwith8QAMmodulation.
• Only1routewillrequireDP-QPSK
• Atleast2routeswillworkwith16QAMmodulation
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VoyagerfieldtrialonLON01toBRU
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Whathavewelearntfromthetesting/evaluationsofar?
• Potentialforverylargecostsavingsinthenetwork.
• InfinerafixedfiltersrequiretuningfrequencyofftheITU-Tgrid– thisispossiblewithAcaciahardware.
• PerformanceoflatestgenerationofDWDMpluggables isverygood – Voyager8QAMwillworkonmost(all?)linksinGÉANTnetworkand16QAMonseveral.
• Opticalpowermanagementisthekey.
• Softwareselectablemodulationmakesplanningmucheasier.
• AnopticalmodellingisneededtoscaleupnumberofAWs.
• Turningupalienwavesisbestdonecarefully!
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AWFieldTrials/Labconclusions
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NetworkdesignwithDCIs
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AcostcomparisonDCIvInfineraDTNx
100G 200G 300G 400G 500G 600G 700G 800G 900G 1T 1.1T 1.2T 1.3T 1.4T 1.5T
HWcostofdeliveringcapacitybetweenadjacentPoPsoverafibrelink
DCI1 DCI2
*AnalysisbySebastianoBuscaglioneandMatthewGordon,August2017
Networks·Services·Peoplewww.geant.org
• In2013GÉANTranthePRISMcompetitionforNordunet.
• Fourtransmissionvendorsweresuccessful:Infinera,Ciena,Alcatel-Lucent(nowNokia)andCoriant.
• ThisframeworkagreementisstillactiveandallowsallGÉANTNRENstopurchaseDWDMequipmentatthePRISMprices.
• ThisisnowbeingrefreshedbythevendorstoaddtheirDCIoffering.
• GÉANTplanstorunamini-competitionbetweenPRISMvendorstochooseaDCIboxtoupgradetheGÉANTnetwork.
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PRISM
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DCIdeploymentinGÉANTin2018
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• Newgenerationofdata-centretypetransponderswilldelivertheperformanceGÉANTneedsoverourexistingInfineralinesystem.
• TestinghasconfirmedseveralDCIboxesonthemarketwithexcellentpricingcf.traditionalDWDMvendors.
• TIPpromisestofillthemissingmulti-vendorsoftwaremodelling- requiredtoscaleupopenopticalnetwork.
• GÉANTwillpurchaseDCIequipmentasaninterimtechnologyfortranspondersbetweennowandthenetworkrefreshin2020/21
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Summary
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Thankyou
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