deploying nbase-ttm 2.5g/5gbase-t technologies...deploying nbase-ttm 2.5g/5gbase-t technologies...
TRANSCRIPT
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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
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Cat5e
Cat6
Cat6a
2016EthernetAllianceBASE-TRoadmap
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TheApplicationsSpacesofBASE-T
www.ethernetalliance.org 3
DataRate
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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!
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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.
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What’sa“UseCase”?
• DesignersofNBASE-Trecognizedmanylinkswouldsupportratesabove1Gbps– WirelessAccessPointswereinstalledinlinks
thatwerefannedout,allowinglessthanworst-casealiencrosstalk
• Aliencrosstalkimpactsthespeedyoucangetabove1Gbps– Cat5eandCat6arenotspecifiedforalien
crosstalk
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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
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Source: NBASE-T AllianceNBASE-T&IEEE- TimelineofSuccess
PSOCSR2001 8
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Whatyouwillhear:
• PeterJoneswilldiscussasystemsvendors’perspective– Whyyouwanttouseit,whattolookfor
• MasoodShariffwilldiscussthecablingperspective– TIAdevelopments,moreonusecasesandCat5evsCat6vsCat6aperformance
• DanPayerlewilldiscusstestingissuesfor2.5G/5GBASE-Tperformance
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NBASE-T™2.5GBASE-T/5GBASE-TWhereandWhyPeterJonesPrincipalEngineer– CiscoSystemsChairman– NBASE-TAlliance
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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
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• 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
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• 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
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PotentialApplicationsENTERPRISE
Indoor/OutdoorAccessPointsWorkstations,Desktops,NotebooksEnterpriseNASProfessionalAudioVideoSystemsandVideoContentEditingMedicalImagingSystems
HOME
AccessPoints&RoutersDesktops,NotebooksNASGamingComputersSmallCells
INDUSTRIAL
Industrial/OutdoorAccessPointsWorkstationsMachineVisionCamerasCompactSwitches
SERVICEPROVIDERS
DOCSISHomeGatewaysPONONTGatewaysSmallCells
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NBASE-TAllianceatInterop2016LasVegas
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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
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Structured cabling considerations for supporting NBASE-T and IEEE Std.
802.3bz for 2.5G/5GBASETMasood Shariff -
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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?
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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)
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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
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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
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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
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AlienlimitedSNRriskmatrix(sourceTIATSB-5021)
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Viabilityof5GoverCategory5Ecabling
V = verification recommended. E = Estimated to support. N/A = This configuration is not applicable.
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Viabilityof5GoverCategory6Cabling
V = verification recommended. E = Estimated to support. N/A = This configuration is not applicable.
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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
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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
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NBASE-T™2.5GBASE-T/5GBASE-TFieldTestingRecommendationsDanPayerleBusinessunitmanager– IDEALNetworksMember– NBASE-TAlliance
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DOESACABLINGPLANTNEEDTOBERE-TESTEDTOSUCCESSFULLYDEPLOYNBASE-T?
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Notnecessarily…
• Withproperinspectionandmitigationtechniques,NBASE-TcanbesuccessfullydeployedinmostexistingcablingplantsthathavebeencertifiedtopassTIA-568-C.2performancerequirements.
• Thereareperformanceparametersthatarenewtoinstallersandnetworkengineerswhichmustbediscussed.
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CompatibilityofinstalledcablingInternaltransmissionparameters
2.5GBASE-T 5GBASE-TMeasurementfrequencyrange 1-100MHz 1-250MHz
Installedcategory5ecabling Meetsrequirementsbydesign
Frequencyrangeexceedsdesignspecification.Incaseofperformanceissues,implementmitigationtechniquesrecommendedbyTIATSB-5021
Installedcategory6cabling Meetsrequirementsbydesign Meetsrequirementsbydesign
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FactorsaffectingNBASE-Toperation
• PowerSpectralDensity(PSD)• Describestheamountenergyacrossafrequencyrange.
• PowerBack-off(PBO)• Methodofreducingtransmitpoweronshorterchannelstoreduce
aliencrosstalk– improvingtheALSNRofbundledcables.
• AlienLimitedSignaltoNoiseRatio(ALSNR)• Ratioofintendedsignalvssignalcoupledbyneighboringcables.
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1GBASE-T&10GBASE-TExistingApplications
Source: Berk-Tek
Harmonics
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2.5GBASE-T&5GBASE-T
Source: Berk-Tek
Harmonics
Harmonics
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1/2.5/5/10GBASE-T• Harmonicsfromlowerspeedapplicationshavethepotentialtoeffecthigherspeedapplications
• PBOreducestheeffectofaliencrosstalk
Source: Berk-Tek
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PowerBack-off(PBO)
• Reducestransmitpowerwhenabletoreducealiencrosstalk.
• TransmitpowerdependsonInsertionLoss/lengthofachannel.
• 1000BASE-T(1G)hasnoPBO(alwayshighpower).
MHzSource: Aquantia
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PBOreducesaliencrosstalk
• Byreducingtransmissionpower,NBASE-Tisabletooperateatfrequenciesabovethedesignrangeofcategory5eand6cable
• Combinedwithpropermitigationtechniquesweexpectavastmajorityofcablingplantswillsupport2.5/5GBASE-T.
MHz Source: Aquantia
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Bundledcables/cordsBundleddistance
Totaldistance
Bundledcords
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Unbundledcables/cords
Unbundledcords
Unbundledhorizontalcables
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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
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Recap• Mitigationtechniqueswillhelpachievemaximumperformanceof
NBASE-Toncategory5e/6cablingevenwhenthespecifiedperformanceofthecablingisexceeded
• AliencrosstalkistheprimaryconcernforNBASE-TapplicationsandisreducedbytransceiversusingPBO
• AdditionaltestingisnotrequiredforNBASE-Tdeployment.• Shouldinspectionofthecablingplantidentifyquestionablechannels,
TIATSB-5021describesmethodstoqualifychannelsinthefield• “Downshift”allowsthesystemtoadapttothecablingplantand
providethehighestpossibledatarate
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Wrap-upandQ&A
GeorgeA.Zimmerman,Ph.D.,CMEConsulting
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Wrap-up
• NBASE-Tprovides2.5Gbpsand5Gbpsoverinstalledcabling– InteroperablewithIEEE802.3bz(2.5GBASE-Tand5GBASE-T)– NBASE-Tdownshiftadaptstocablingtoachievethebestperformance
• InteroperableNBASE-TproductsareprovidingWave2802.11acwirelessandotherneedsat>1Gbpswiredaccess
• CablingstandardsandguidelinesareintheirfinalstagestosupportNBASE-Tand802.3bzrollouts
• Fieldtestprocedurestomaximizeperformanceareavailable
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PANELQ&A
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THANKYOU!Formoreinfo,seehttp://www.nbaset.org
andhttp://www.nbaset.org/technology/library/white-paper-2/