gÉant network challenges - glif · 2017-10-11 · networks · services · people gÉant network...

Networks·Services·Peoplewww.geant.org

GÉANTNetworkchallenges

GuyRoberts,SeniorNetworkArchitect,GÉANT

26Sept2017


• Reducecostofprovisioningcapacityontransmissionlayer

• Addressscalability/costonIP/MPLSlayer

• Synchroniseshort/mediumtermstrategywithlongerterm(postlinesystemprocurement)

• Increasemodularity– addressvendorlocking

• Optimisearchitecturetotakemaximumadvantageofrecentdisruptivetrends

2

NextgenGÉANTNetworkstrategy- guidingprinciples

Networks·Services·Peoplewww.geant.org 3

Recentdisruptivetrends

• DCIboxeswithcoherentDWDM

• Openlinesystems/Alienwaves

• Merchantsiliconpacketswitching(e.g BroadcomJerichoII)

• DWDMCommoditypluggables

• Trendtowardspacketopticalintegration

• Disaggregation(softwareandhardware)


• Nextgenofcommoditypluggableopticshas excellent performance• Datacentrestyle1RUstackableformfactor.• Upto6timesreductionincostovertraditionaltelecomsequipmentarchitectures

• Significantincreaseindensity andreductioninpowerconsumption• Modular– easytoscaleup• Easyupgradepathtonewtechnology

DataCentreInterconnects

4

• Lossofequipmentintegrity– notdesignedtobehighlyavailableasperETSIetc.• Nointernalhardwareredundancy• Noin-serviceupgrades• Restrictedtemperatureoperation


Reducecostofprovisioningcapacityontransmissionlayer– costcomparison

Costofprovisioningcapacityfromclienttoclientin100sofGbps viaDCIvsInfinera DTNxs – mostandleastexpensiveDCIsolutionscostsareshown– upto90%cheaperbandwidthusingCoriant solutionvsDTNx

€0

€500,000

€1,000,000

€1,500,000

€2,000,000

€2,500,000

100G 200G 300G 400G 500G 600G 700G 800G 900G 1T 1.1T 1.2T 1.3T 1.4T 1.5T

HWcostofdeliveringcapacitybetweenadjacentPoPsoverafibrelink

DCI1 DCI2

AnalysisbyMatthewGordon


Reducecostofprovisioningcapacityontransmissionlayer– DCIcostscomparison

€0

€50,000

€100,000

€150,000

€200,000

€250,000

€300,000

€350,000

€400,000

€450,000

100 200 300 400 500 600 700 800 900 1000 1100 1200

CostcomparisonDCIswith16QAM

HighvariationincostbetweenDCIsolutions

AnalysisbyMatthewGordon


CurrentGÉANTcostpainpoints

Problemswithcurrentarchitecture:

• OTNlayerexpensive

• DTNx chassisrunningoutofslotsincentralPoPs

• OTNusefulforprotectionswitchingandmultihop buttrafficis70%unprotectedandnexthop

• OTNchassisareDCpoweredfullrackwhileDCIareACpowered1RU

• ProliferationofIP/MPLS

SlidebySebastianoBuscaglione


GÉANTtransmission:Interimsolution

Solution

• UseDCItoprovisionbandwidthforhighcapacityIP/MPLStrunks

• DCIsareupto6xcheaperthanDTNx

• KeepDTNx forlinkmanagementandlambdaprovisioninggreatlysimplifyingDCIroleandminimisingrisk

• IntegrationofDCIallowsforgrowthoffsetandgenerateenoughsparestoallowtoceasespendingonDTNxplatform

SlidebySebastianoBuscaglione


Medium-termsolution:AlienwavesoverOpenLineSystems

9

• Alienwavesallowtranspondersfrommultiplevendorstooperateonasinglelinesystem.• Integrated3rdpartyDWDMpluggables availableinvariousterminaltechnologiesandvendors.• Stillbenefitfromasinglevendorprovidingend-to-endopticalmanagement:Channel&spanequalization,DCNconnectivity(OSC),ALS,Alarmreporting.

OpenLineSystem

ILAROADM ROADMILA


Medium-termsolution:OpenLinesystem.

10

• Thisisthecurrentclosedmanagementmodel

• Long-termvision.Butopenstandardsandmanagementnotavailableyet

• Mediumtermsolution.Openaccess,singlemanagementplaneforOLS


Addressscalability/costonIP/MPLSlayer

• MainfocusonshorttermisaddressingMXlinecardsfragmentationbyintroducinghigherdensitycardsincentrallocationandmovinglowerdensitycardstotheperiphery

• MX480/960platformremainsviabletill2020+• VendorsiliconbasedsolutioncomingtothemarketasviablealternativetoJuniper,howeverstill1to2yearsawayforfullL3support

• FlexE inMPC10allowsforlinkbundlingwithbitstriping– addresselephantflows• ShorttermGÉANTtoaddressmaintenancecostsofJuniperMXsbyoptimisingcardsutilisationandpursuingcostreductionstrategywithvendors

• MediumtermGEANTtotest,validateandintegratealternativetoMXs- Prouter,brite box,packetopticalintegration


Thankyou


12

[email protected]

Networks·Services·Peoplewww.geant.org13

Optimisationofcostperbitbydiversifyingdeliverystrategy

0

50000

100000

150000

200000

250000

300000

350000

400000

450000

500000

Current Switchthrough OpticalExpress DCI/PE DCI/P DCI/P- PE DCI/P- PEOX

HWcostE

UR

Solution

Costtodeliver100GbpsClienttoClient1hop

Pushtraffictolowestpossiblelayer

gÉant network challenges - glif · 2017-10-11 · networks · services · people gÉant network...

Documents