50 GbE, 100 GbE and 200 GbE PMD Requirements - IEEE 802 · 50 GbE, 100 GbE and 200 GbE PMD Requirements Ali Ghiasi Ghiasi Quantum LLC NGOATH Mee6ng Atlanta January 20, 2015

50GbE,100GbEand200GbEPMDRequirements

AliGhiasi GhiasiQuantumLLC

NGOATHMee6ng

Atlanta

January20,2015

Observa;onon50GbE,200GbE,andNG100GbEPMDs

q  50GbEand200GbEarecomplimentarysetofstandardsjustasweobservedinthemarketplacethecomplimentarynatureof25GbE/100GbE

–  Currentgenera;onofswitchASICoffer4x25GbEbreakoutforsmallincrementalcost–  Nextgenera;onswitchASICwilloffer4x50GbEbreakoutforsameeconomics–  Completeeco-systemrequirebackplane,Cucable,100mMMF,possibly500mPSM4,2000m,

and10,000mPMDsandshouldfollow25/100GbEPMDsq  NG100GbEPMDsaNributesandrequirements

–  Currentlywiththeincreaseinvolumethemarketisenjoyingsignificantcostreduc;onfor100GbEPMDssuchas100GBase-SR4,PSM4,andCWDM4/CLR4

–  CostmaynotbethemaindrivertodefineNG100GbEPMDswithexcep;onofCAUI-2–  Currentlydefined100GbEPMDswillrequireinverse-muxwithintroduc;onof50GASICIO

•  APMA-PMAdevicecouldaddressanyI/Omismatch•  SimplestformofPMA/PMDimplementa;onoccursforthecasewhen#ofelectricallanes=

#ofop;callanes/λ–  Doweneedwitheverygenera;onofelectricalI/O25G,50G,100Gintroducenew100GbE

PMDswhichareop;mizedforgivengenera;onofASICbutnotop;callybackwardcompa;ble–  Thedecisiontodefinenewop;calPMDshouldnotbetakenlightlytosaveaPMA-PMAmux!

A.Ghiasi 2IEEE802.3NGOATHStudyGroup

Today’sEthernetMarketIsn’tJustaboutEnterprise

q  Router/OTN–  Leadsthedeploymentwithfastestnetworkinterface–  Drivesbleedingedgetechnologyathighercostandlowerdensity

q  Clouddatacenters–  Closfabricstypicallyoperateatlowerportspeedspeedtoachieveswitch

ASICradixof32or64–  Drivescost-power-densitytoenablemassivedatacenterbuiltout–  Forklicupgradedoublingcapacityevery~2.5yearswithdoublingof

switchASICcapacityq  Enterprise

–  Enjoysthevolume-costbenefitofdeployingpreviousgenera;onofCloudDataCenterstechnology

–  MorecorporateITservicesarenowhostedbytheCloudoperator–  AccordingtoGoldmanSachsresearchfrom2013-2018Cloudwillgrowat

rateof30%CAGRcompareto5%forEnterpriseIT•  hfp://www.forbes.com/sites/louiscolumbus/2015/01/24/roundup-of-cloud-compu;ng-forecasts-and-market-es;mates-2015/.

A.Ghiasi 3IEEE802.3NGOATHStudyGroup

EthernetSerialBitrateandPortSpeedEvolu;onq  Router/OTN,Cloud,vsEnterpriseapplica6ons

–  NGOATHprojectaddressesnextgenera;onCloudandEnterprise–  50GbEisnotonlyaninterfaceonCloudserverbutalsoareplacementfor40GbE

intheEnterprise.

A.Ghiasi IEEE802.3NGOATHStudyGroup 4

1"GbE""

10"GbE"

100"GbE"""

25"GbE"

400"GbE"

50"GbE"

200"GbE"

800"GbE"

1"

10"

100"

1000"

1995" 2000" 2005" 2010" 2015" 2020" 2025"

Seria

l"Bitrate"(Gb/s)"in"Rela:

on"to

"Etherne

t"Stand

ard"

Year"

Serial"Bitrate"

Standard"

Evolu;onofEthernetSpeed-Feedq  NGOATHprojectisaddressingtheneedfornextgenera6onCloudtrack

–  P802.3.bsaddressingtheneedfornextgenera;onRouter/OTNtrack–  25GSMFprojectaddressingtheneedofnextgenera;onEnterprise/campus

A.Ghiasi 5

20182017201620152014201320122011201020092008 2019

480GSwitch48PortsSFP+48x10GbE

1440GSwitch36PortsQSFP1036x40GbE/144x10GbE

3200GSwitch32PortsQSFP2832x100GbE/64x50GbE/128x25GbE

6400GSwitch32PortsQSFP5632x200GbE/64x100GbE128x50GbECloudTrack

400GLinecard4PortsCFP4x100GbE

800GLinecard8PortsCFP28x100GbE

3200GLinecard8PortsCFP88x400GbERouter/OTN

Track

1280GSwitch32PortsQSFP1032x40GbE/128x10/1GbE

3200GSwitch32PortsQSFP2832x100GbE/128x25/10GbE

EnterpriseTrack

480GSwitch48PortsSFP+48x10/1GbE

ApproximateYearofIntroduc6on*

*Notallpossibleconfigura;onarelisted.IEEE802.3NGOATHStudyGroup

CurrentandNextNGOATHPMDs

A.Ghiasi IEEE802.3NGOATHStudyGroup 6

25G/50GI/100G-MAC

Reconcilia6on(RS)

CGMII

PCS

FECRS(528,514)ForallPMDsexceptLR4

PMA

PMD

PMA

CAUI-44x25GAUI

100G

Base-LR4

100G

Base-SR4

100G

Base-CR4

100G

Base-KR4

PSM4

CWDM

4

CLR4

I.50GbEIncludedinhNp://25gethernet.orgapplica6onistoincreasefabricradix.

100GbE

25/100GbE

25/50/100GbE

50G/100G/200G-MAC

Reconcilia6on(RS)

CCMII

PCSFECRS(528,514)or

(544,514)PMA

PMD

PMA

CCAUI-44xLAUI

50G-LR/200G-LR4

200G

-SR4

/100G-

SR2/50G-SR

50G-CR

/200G-CR

450G-KR

/200G-KR

4

100G

-DR2

/200G-

DR4

50G-FR/200G-FR4

50/200GbE

50/200GbE

50/100/200GbE

100GbE

100G

base-FR2

or

100G

base-FR

TheChallengewith100GbENextGenPMDsq  Approachsupportexis6ng100GbEPMD

A.Ghiasi 7

TP2 TP3

CAUI-4

TP3 TP2

PM

ALegacy

100 GbE KR4 FEC

Next Gen 100 GbE

KP4? PM

D

CAUI-2

PM

D

PM

A

QSFP28

PM

A

PM

A

½ofQSFP56

KR

4-K

P4

q  Approachtosupportnew100GbEPMDs

TP2 TP3

CAUI-4

TP3 TP2

PM

ALegacy

100 GbE

Next Gen 100 GbE

KP4? PM

D

CAUI-2

PM

D

PM

A

QSFP28

PM

A

PM

A

½ofQSFP56

KP

4 FE

C?

q  Thesimplestapproachiffeasibleistodefinenew100GbEPMDsbasedonKR4FEC.

TP2 TP3

CAUI-4

TP3 TP2

PM

ALegacy

100 GbE KR4 FEC

Next Gen 100 GbE KR4 FEC P

MD

CAUI-2 P

MD

PM

A

QSFP28

PM

A

PM

A

½ofQSFP56

IEEE802.3NGOATHStudyGroup

Observa;on:50/200GbEaretheenablerswhile100GbEisaniceaddi;on

q  200GbEPMDs(Applica6onnextgenera6onCloudDataCenter)–  200Gbase-LR4basedonCWDM4enablesnextgenera;onuncooledlowcostPMD

•  Does200Gbase-FR4offerssignificantlylowercostsolu;ontodefineseparatePMD?–  200Gbase-DR4offers200GbEaswellas50/100GbEbreakout–  100Gbase-SR4offers200GbEaswellas50/100GbEbreakout–  200Gbase-KR4with30+dBrequiredtomeet1mbackplane

•  Backplanelosswilldetermineexactcablereachof3to5m

q  100GbEPMDs(Applica6ondoublingradixinCloudandcouldbeabeNermatchwithnextgenera6on50GASICsIO)–  100Gbase-LR2toenablesnextgenera;onuncooledlowcostPMD

•  Does100Gbase-FR4offerssignificantlylowercostsolu;ontodefineseparatePMD?–  100Gbase-DR2use½ofthe200Gbase-DR4–  100Gbase-SR2op;ons:use½ofthe200Gbase-SR4ordefineadual-λduplex–  Tooearlytodefineserial100Gb/sandnoneedtodefine2lanesCuKR2/CR2

q  50GbEPMDs(Nextgenera6onserversandnextGenEnterprise/campus)–  50Gbase-LRrequiredforthecampusandaccessapplica;on–  Doweneedtodefineboth50Gbase-FRand50GBase-DR?–  50Gbase-SR–  200Gbase-KR4with30+dBrequiredtomeet1mbackplane

•  Backplanelossshoulddeterminetheexactcablereach3to5m.A.Ghiasi 8IEEE802.3NGOATHStudyGroup

50Gb/s/laneInterconnectSpaceq  OIFhasbeendefiningUSR,XSR,VSR,MR,andLR

–  OIF-56G-LRisgoodstar;ngpointbutdoesnotsupportprac;cal1mbackplaneimplementa;onbut27.5dBisinsufficienttobuildprac;calbackplanes!

A.Ghiasi 9

Application Standard Modulation Reach Coupling Loss

Chip-to-OE(MCM)

OIF-56G-USR NRZ <1cm DC 2dB@28GHz

Chip-to-nearbyOE(noconnector)

OIF-56G-XSR NRZ/PAM4

<5cm DC [email protected]@14GHz

Chip-to-module(oneconnector)

OIF-56G-VSR NRZ/PAM4 <10cm AC 18dB@28GHz10dB@14GHz

IEEECDAUI-8 PAM4 <10cm AC [email protected]

Chip-to-chip(oneconnector)

OIF-56G-MR NRZ/PAM4 <50cm AC 35.8dB@28GHz20dB@14GHz

IEEECDAUI-8 PAM4 <50cm AC [email protected]

Backplane(twoconnectors)

OIF-56-LRIEEE

PAM4 <100cm100cm

ACAC

27.5dB@[email protected]

IEEE802.3NGOATHStudyGroup

TEWhisper40”Backplane“TheGoldStandard”

A.Ghiasi 10

See:hfp://www.ieee802.org/3/bj/public/jul13/tracy_3bj_01_0713.pdf

IEEE802.3NGOATHStudyGroup

Responseof40”TEWhisperBackplanewithMegtron6–  30”backplaneMegtron6HVLPwith6milstraces

•  Fordenseapplica;onmoreprac;caltracewidthwillbe4.5-5mils–  Daughtercards5”eachMegtron6VLPwith6milstraces–  Thelossis~30dBat12.87–  Actualimplementa;onmayneedtousenarrowertraceslike4-5mils

increasingthelossfurther–  Withbackplanenotshrinking30-32dBlossisrequiredforprac;callinecards.

A.Ghiasi 11IEEE802.3NGOATHStudyGroup

25G/50GChannelSummaryResultsforTEWhisper1mBackplane

TestCases

ChannelIL(dB)

Channel+PKGIL(dB)

ILD ICN(mV)

PSXT(mV)

COM(dB)

25GNRZWithIEEE12mmPackage 28.4 30.4 0.37 1.60 4.0 5.5

25GNRZWithIEEE30mmPackage 28.4 32.5 0.37 1.63 3.3 4.8

25GPAM4WithIEEE12mmPackage 16.4 17.1 0.05 0.98 2.0 5.7

25GPAM4WithIEEE30mmPackage 16.4 18.1 0.05 0.98 1.8 5.7

50GPAM4WithIEEE12mmPackage 29.7 34.7 0.41 1.65 3.1

50GPAM4WithIEEE30mmPackage 29.7 36.7 0.41 1.64 2.66

A.Ghiasi 12

q  Closingthelinkbudgeton30dBchannelwith2dBCOMmarginisnottrivial–  Alossreduc;onalsonotanop;ongivenTEbackplanetracewidthratherwide

of6milswheretypicallinecardtracewouldbein4.5-5mils!

IEEE802.3NGOATHStudyGroup

MoreAdvancePCBMaterialOnlyModestlyImprovestheBackplaneLoss

q  EvenmovingfromMegtron6DF~0.005toTachyonDF~0.0021thelossonlyimprovesby~20%–  WithDF≤0.005lossisnowdominatedbyconductorsizeandroughness.

A.Ghiasi 13

LeeRitcheySourceDeisgncon2015

IEEE802.3NGOATHStudyGroup

Summaryq  In802.3todayweneedaddress3markets

–  Router/OTNbleedingedgetechnologyandspeed–  ClouddrivenbyforklicupgradeasresultofswitchBWdoublingevery~2.5years–  Enterpriseleveraginglastgenera;oncloudtechnology

q  50/200GbEofferop6mumsolu6onsetfornextgenera6oncloudwith50GbEforserversand200GbEforfabrics

–  Incurrentdatacenterbuildout50GbE(25GMSA)isdeployedtodoubleradixandfabriccapacity

•  Innextgenera;ondatacentershighdensity100GbElikelywillbedeployedtobuildultrascalefabric

q  NextGen100GbEPMDscanbebasedon200GbEPCS/FECoritcanbedefinedtobebackwardcompa6bleusingClause82PCSandKR4FEC

–  TheadvantageofusingcommonFECfor100GbEand200GbEistoachieveiden;calperformanceforaPMDopera;nginfullrateorbreakoutmode

–  Consideringtheinvestmentmadeincurrent100GbEPMDsbackwardcompa;bilityshouldanimportantconsidera;on

q  Toenablenextgenera6on6.4Tblinecard,thebackplanebasedonimprovedFR4materialmustoperateat50Gb/s/lane

–  Aminimumlossof30dBisrequiredforconstruc;onof1mconven;onalbackplaneq  The802.3needtobalancecloudapplica6onsdrivenbyforklioupgradeaswellas

synergyandcompa6bilityacrossEtherneteco-system.

A.Ghiasi 14IEEE802.3NGOATHStudyGroup