DeployingNBASE-TTM 2.5G/5GBASE-TTechnologies

GeorgeA.Zimmerman,Ph.D., CMEConsultingBoardofDirectors,NBASE-TAlliance

PeterJones,CiscoSystems Chairman,NBASE-TAllianceMasoodShariff,CommScope Participant,NBASE-TAllianceDanPayerle,IDEALNetworks Participant,NBASE-TAlliance

Cat5e

Cat6

Cat6a

2016EthernetAllianceBASE-TRoadmap

TheApplicationsSpacesofBASE-T

www.ethernetalliance.org 3

DataRate

NBASE-Tand802.3bzTechnology– Basedon10GBASE-T

• PAM-16withthesameLDPCcodeforgoodperformance– Minormodificationsgivebetterimpulsenoiseperformance– Upperfrequencyof½(5G)and¼(2.5G)thatof10GBASE-T– Proven10GBASE-Tstartupsequenceforgoodinteroperability

• NBASE-Tand802.3bzexpectedtobeinteroperablewitheachother– AutoNegotiationenablesmulti-modePHYoperation– 802.3bzPHYsignalingisidenticaltoNBASE-T

• SupportsPoE!

2.5GonCat5e:10GBASE-Ttechnologymakesitfeasible

• Assume:2.5Gbpsratesuse<=100Mbpsofbandwidth– Cat5especifiesthatfrequencyspan->Transmissionat2.5Gbpsrequires6.25bits/sec/Hz

• Assume:Linksupports1000BASE-Toperation– 1000BASE-Trequires4bits/sec/Hz->Differenceis2.25bits/sec/Hz=6.75dB– Signalingat200MBaud insteadof125MBaud losesatmost2dB

• Systemparametersfor1000BASE-T:– Codinggainof1000BASE-Twas6dB(asymptotic,actualgainis~4.75dB)– 1000BASE-Tdesignpoints10.5dBdesignmarginw/oFEXT(orwithFEXTcancellation)

• Seegrouper.ieee.org/groups/802/3/tutorial/march98/mick_170398.pdf(6.5bit-equivalentADC)• Dropsto8.2dBwithClause40AANEXTlimitlevels

• Needtorecoverupto8.75dBrelativeto1000BASE-Tdesignpoint– ALMOSTwithinthetargetmarginforimplementationlosses.

What’sa“UseCase”?

• DesignersofNBASE-Trecognizedmanylinkswouldsupportratesabove1Gbps– WirelessAccessPointswereinstalledinlinks

thatwerefannedout,allowinglessthanworst-casealiencrosstalk

• Aliencrosstalkimpactsthespeedyoucangetabove1Gbps– Cat5eandCat6arenotspecifiedforalien

crosstalk

IEEE802.3bzorNBASE-T?

• Expecttobeinteroperablewitheachother,sohowdotheydiffer?• NBASE-Tadds“downshift”to802.3bz

– NormalAutoNegotiationselectsthefastestratebothPHYssupport,irrespectiveofthecabling,noiseorenvironment

– But,in2.5G/5GBASE-T,thespeedyougetvarieswiththecablingconfigurationandotherlinkscrosstalking

– So...“downshift”automaticallyshiftstheratebasedonthechannelnoise• SimilartoWi-Firateadaptation

• Usersalwaysgetareliablelink

Source: NBASE-T AllianceNBASE-T&IEEE- TimelineofSuccess

PSOCSR2001 8

Whatyouwillhear:

• PeterJoneswilldiscussasystemsvendors’perspective– Whyyouwanttouseit,whattolookfor

• MasoodShariffwilldiscussthecablingperspective– TIAdevelopments,moreonusecasesandCat5evsCat6vsCat6aperformance

• DanPayerlewilldiscusstestingissuesfor2.5G/5GBASE-Tperformance

NBASE-T™2.5GBASE-T/5GBASE-TWhereandWhyPeterJonesPrincipalEngineer– CiscoSystemsChairman– NBASE-TAlliance

Access SwitchMostly 1000BASE-T portsPoE PSE (15/30/60W, 4PPoE)

CablingCat 5e/6/6A up to 100MNew installs using Cat 6A for 10+yr life

Access PointConnects 802.11 to 802.3PoE PD (Powered Device)Footprint sensitive (e.g. power, heat, etc.)11acWave 2 drives backhaul traffic > 1 Gb/s.No easy way to get above 1Gb/s.

1000BASE-TPoweroverEthernet

802.3Ethernetand802.11WLAN–DeploymentsToday

11

• Between2003to2014~70billionmetersofCat5eandCat6cablingweresold….– ~90%ofinstalledbase– Enormousnetworkinfrastructureinvestment

• Existingspecificationssupport1Gb/soverthiscable,butfasterdataratesarepossible

• BASE-Tallowsincrementalupgrade

– Letsgetmorevaluefromthisinvestment!– Whatcanweenable?

Why2.5Gand5GBASE-T?

10metersofcablingforeveryman,woman,andchildonEarth…

Installed Base: Outlets by Cable Type Source: BSRIA December 14

0

200

400

600

800

1000

1200

1400

1600

1800

2003 2007 2011 2015Cat 5e outlets Cat 6 outlets Cat 6a outlets Cat 7 outlets

2014Cat 5e Outlets 539 MCat 6 Outlets 743 MCat 6a Outlets 111 MCat 7 Outlets 10 MTotal 1.4 B

• NBASE-TAlliance(www.nbaset.org/)– Vendoralliancefor2.5G/5GBASE-Twith45+participant

companies.

• WhoisintheAlliance?– Components,silicon,systems,cabling,test,etc.

• Alliancerole?– Enablewidespreaddeployment,evolvespecifications,

facilitateinteroperability.

AllianceStrength- FullEcosystem

NBASE-TAllianceSM - Overview

PotentialApplicationsENTERPRISE

Indoor/OutdoorAccessPointsWorkstations,Desktops,NotebooksEnterpriseNASProfessionalAudioVideoSystemsandVideoContentEditingMedicalImagingSystems

HOME

AccessPoints&RoutersDesktops,NotebooksNASGamingComputersSmallCells

INDUSTRIAL

Industrial/OutdoorAccessPointsWorkstationsMachineVisionCamerasCompactSwitches

SERVICEPROVIDERS

DOCSISHomeGatewaysPONONTGatewaysSmallCells

NBASE-TAllianceatInterop2016LasVegas

16PSOCSR2001

802.11acand2.5G/5GBASE-TforecastsThereisarapidtransitionfrom11nto11acWave2startsrampingin2016

2.5G/5GBASE-TEthernetisexpectedtoberapidlyadopted

2013 2020

APs

Enterprise 802.11ac AP TransitionSource: Dell’Oro Group Wireless LAN 5-year Forecast Jan 2016

Wave 1Wave 2

2014 2020

Ports

100M/1000Mto2.5G/5GtransitionSource: Dell’Oro Group Ethernet Switch 5-year Forecast Jan 2016

5.0Gbps

2.5Gbps

1000Mbps

100Mbps

Structured cabling considerations for supporting NBASE-T and IEEE Std.

802.3bz for 2.5G/5GBASETMasood Shariff -

Outline• What are the cabling committee guidelines for Category 5e and

Category 6 to support 2.5G/5GBASET?• Are Category 5e and Category 6 specifications changing?• What additional qualifications are needed to characterize

Category 5e and Category 6 to support 2.5G/5GBASET?• Are test procedures available to evaluate the installed base?• What are the chances that existing Category 5e and Category 6

may support 2.5G/5GBASET?• Are there means for mitigating or improving the installed base of

Category 5e and Category 6 cabling?• What is the recommendation for new installations?

CablingGuidelines• TIA TSB-5021 “Guidelines for the Assessment and

Mitigation of Installed Cabling to Support 2.5GBASE-T and 5GBASE-T” (draft 1.1 July 2016)

• ISO/IEC TR 11801-9904 “Information Technology -Implementation and Operation of Customer Premises Cabling –Part 9904: Guidelines for the use of installed cabling to support 2,5GBASE-T and 5GBASE-T applications” (PDTR, March 2016)

AreCategory5eandCategory6specificationschanging?

• There are no plans to change or revise any of the Cabling standards for Category 5e and Category 6 specifications

• However, existing Category 5e and 6 links/channels are being evaluated for extended frequencies and additional specifications needed to support 2.5G/5GBASE-T

• If the evaluation passes, there is a good chance that 2.5G/5GBASE-T applications will work on these installed links/channels

• If the evaluation fails, the links/channels are still Category 5e or Category 6 and can continue to be used for other applications

Qualificationsneededtosupport2.5G/5GBASE-T

• Category 6Ø No changes to internal parameters already specified up to 250

MHzØ Characterize alien cross-talk noise coupling up to 200 MHz

• Category 5eØ Internal parameters “extrapolated” to 250 MHzØ Link and channel NEXT and PSNEXT relaxed above 100 MHz

from 20 dB slope to 40 dB slope Ø Characterize alien cross-talk noise coupling up to 200 MHz

QualificationTestprocedures• Lab and field test procedures are already available to qualify

internal parameters ( IL, RL, NEXT, FEXT, Delay, Delay Skew) for Category 5e and 6.

• Inspection together with comparison of use cases against similar use cases already measured in the laboratory for alien cross-talk can be used for a first estimate to qualify existing Category 5e and 6 cabling

• New alien cross-talk qualification using ALSNR procedure is available in the Lab and existing field certifiers can be upgraded to perform ALSNR testing

AlienlimitedSNRriskmatrix(sourceTIATSB-5021)

Viabilityof5GoverCategory5Ecabling

V = verification recommended. E = Estimated to support. N/A = This configuration is not applicable.

Viabilityof5GoverCategory6Cabling

V = verification recommended. E = Estimated to support. N/A = This configuration is not applicable.

Mitigationtoimproveperformance• Separate the equipment cords• Enable NBASE-T downshift• Use Non-adjacent positions on patch panels for 5GBASE-T • Unbundle the horizontal cables• Reconfigure the cross-connect as an interconnect• Replace equipment and patch cords with category 6A components• Replace connectors with category 6A connectors• Replace the horizontal cable with category 6A horizontal cable

Recommendationfornewinstallations• For new installations intended to support WAPs and other

applications supporting 2.5 Gb/s or faster, it is strongly recommended to use category 6A cabling which supports all data rates up to 10 Gb/s

• No additional field testing is needed for Category 6A • If Category 5e or Category 6 is used, qualification testing is

defined in TIA TSB-5021 and general performance requirements in ANSI/TIA-568-C.2

NBASE-T™2.5GBASE-T/5GBASE-TFieldTestingRecommendationsDanPayerleBusinessunitmanager– IDEALNetworksMember– NBASE-TAlliance

DOESACABLINGPLANTNEEDTOBERE-TESTEDTOSUCCESSFULLYDEPLOYNBASE-T?

Notnecessarily…

• Withproperinspectionandmitigationtechniques,NBASE-TcanbesuccessfullydeployedinmostexistingcablingplantsthathavebeencertifiedtopassTIA-568-C.2performancerequirements.

• Thereareperformanceparametersthatarenewtoinstallersandnetworkengineerswhichmustbediscussed.

CompatibilityofinstalledcablingInternaltransmissionparameters

2.5GBASE-T 5GBASE-TMeasurementfrequencyrange 1-100MHz 1-250MHz

Installedcategory5ecabling Meetsrequirementsbydesign

Frequencyrangeexceedsdesignspecification.Incaseofperformanceissues,implementmitigationtechniquesrecommendedbyTIATSB-5021

Installedcategory6cabling Meetsrequirementsbydesign Meetsrequirementsbydesign

FactorsaffectingNBASE-Toperation

• PowerSpectralDensity(PSD)• Describestheamountenergyacrossafrequencyrange.

• PowerBack-off(PBO)• Methodofreducingtransmitpoweronshorterchannelstoreduce

aliencrosstalk– improvingtheALSNRofbundledcables.

• AlienLimitedSignaltoNoiseRatio(ALSNR)• Ratioofintendedsignalvssignalcoupledbyneighboringcables.

1GBASE-T&10GBASE-TExistingApplications

Source: Berk-Tek

Harmonics

2.5GBASE-T&5GBASE-T

Source: Berk-Tek

Harmonics

Harmonics

1/2.5/5/10GBASE-T• Harmonicsfromlowerspeedapplicationshavethepotentialtoeffecthigherspeedapplications

• PBOreducestheeffectofaliencrosstalk

Source: Berk-Tek

PowerBack-off(PBO)

• Reducestransmitpowerwhenabletoreducealiencrosstalk.

• TransmitpowerdependsonInsertionLoss/lengthofachannel.

• 1000BASE-T(1G)hasnoPBO(alwayshighpower).

MHzSource: Aquantia

PBOreducesaliencrosstalk

• Byreducingtransmissionpower,NBASE-Tisabletooperateatfrequenciesabovethedesignrangeofcategory5eand6cable

• Combinedwithpropermitigationtechniquesweexpectavastmajorityofcablingplantswillsupport2.5/5GBASE-T.

MHz Source: Aquantia

Bundledcables/cordsBundleddistance

Totaldistance

Bundledcords

Unbundledcables/cords

Unbundledcords

Unbundledhorizontalcables

AdditionaltestingforNBASE-T•Whennecessary,proceduresareinplacetotestcategory5e/6cablingforNBASE-Tapplicationsupport.

–Besuspectofcategory5echannelsthatarebundledtogether formorethan20m/65ft.–Longerchannelswilloperateathigherpower(lessPBO)andmayhavelowALSNR.1. Performstandardcertificationtestingofthecablingappropriateforit'scategory

rating2. PerformInsertionLosstestingofallchannelsto200MHZ,evenforcategory5e

cabling• FieldtestercalculatesPBOofthedisturbedchannelforaparticularapplication(2.5Gor5G)• FieldtestercalculatesthePBOforeachdisturbingchanneldependingontheintended

application/datarate3. PerformANEXTandAFEXTmeasurementsonthedisturbingchannels4. FieldtestercalculatestheALSNR.TestpassesifALSNRisgreaterthan28dB

Recap• Mitigationtechniqueswillhelpachievemaximumperformanceof

NBASE-Toncategory5e/6cablingevenwhenthespecifiedperformanceofthecablingisexceeded

• AliencrosstalkistheprimaryconcernforNBASE-TapplicationsandisreducedbytransceiversusingPBO

• AdditionaltestingisnotrequiredforNBASE-Tdeployment.• Shouldinspectionofthecablingplantidentifyquestionablechannels,

TIATSB-5021describesmethodstoqualifychannelsinthefield• “Downshift”allowsthesystemtoadapttothecablingplantand

providethehighestpossibledatarate

Wrap-upandQ&A

GeorgeA.Zimmerman,Ph.D.,CMEConsulting

Wrap-up

• NBASE-Tprovides2.5Gbpsand5Gbpsoverinstalledcabling– InteroperablewithIEEE802.3bz(2.5GBASE-Tand5GBASE-T)– NBASE-Tdownshiftadaptstocablingtoachievethebestperformance

• InteroperableNBASE-TproductsareprovidingWave2802.11acwirelessandotherneedsat>1Gbpswiredaccess

• CablingstandardsandguidelinesareintheirfinalstagestosupportNBASE-Tand802.3bzrollouts

• Fieldtestprocedurestomaximizeperformanceareavailable

PANELQ&A

THANKYOU!Formoreinfo,seehttp://www.nbaset.org

andhttp://www.nbaset.org/technology/library/white-paper-2/