deploying nbase-ttm 2.5g/5gbase-t technologies...deploying nbase-ttm 2.5g/5gbase-t technologies...
TRANSCRIPT
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/