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1、IEEEStandardforEthernetAmendment2:MediaAccessControlParameters,PhysicalLayers,andManagementParametersfor25Gb/sOperationIEEEComputerSocietySponsoredbytheLAN/MANStandardsCommitteeIEEEIEEEStd802.3by™-20163ParkAvenue(AmendmenttoNewYork,NY10016-5997IEEESt
2、d802.3™-2015USAasamendedbyIEEEStd802.3bw™-2015)Authorizedlicenseduselimitedto:UNIVERSITYOFOREGON.DownloadedonAugust22,2016at08:30:20UTCfromIEEEXplore.Restrictionsapply.IEEE802.3by™-2016(AmendmenttoIEEEStd802.3™-2015asamendedbyIEEE802.3bw™-2015)IEEESt
3、andardforEthernetAmendment2:MediaAccessControlParameters,PhysicalLayers,andManagementParametersfor25Gb/sOperationSponsorLAN/MANStandardsCommitteeoftheIEEEComputerSocietyApproved29June2016IEEESA-StandardsBoardAuthorizedlicenseduselimitedto:UNIVERSITYO
4、FOREGON.DownloadedonAugust22,2016at08:30:20UTCfromIEEEXplore.Restrictionsapply.Abstract:ThisamendmenttoIEEEStd802.3-2015addsPhysicalLayer(PHY)specificationsandmanagementparametersfor25Gb/soperationovertwinaxialcoppercabling(25GBASE-CRand25GBASE-CR-S)
5、,electricalbackplanes(25GBASE-KRand25GBASE-KR-S),andmultimodefiber(25GBASE-SR).Thisamendmentalsospecifiesa25GigabitAttachmentUnitInterface(25GAUI)andoptionalEnergyEfficientEthernet(EEE).Keywords:25GigabitEthernet,25GAUI,25GBASE-CR,25GBASE-CR-S,25GBAS
6、E-KR,25GBASE-KR-S,25GBASE-SR,25GMII,Auto-Negotiation(AN),BackplaneEthernet,EnergyEfficientEthernet(EEE),Ethernet,ForwardErrorCorrection(FEC),IEEE802®,IEEE802.3™,IEEE802.3by™,multimodefiber(MMF),PhysicalCodingSublayer(PCS),PhysicalMediumAttachment(PMA
7、)sublayer,PhysicalMediumDependent(PMD)sublayer,ReconciliationSublayer(RS)TheInstituteofElectricalandElectronicsEngineers,Inc.3ParkAvenue,NewYork,NY10016-5997,USACopyright©2016byTheInstituteofElectricalandElectronicsEngineers,Inc.Allrightsreserved.Pub
8、lished29July2016.PrintedintheUnitedStatesofAmerica.IEEEand802areregisteredtrademarksintheU.S.Patent&TrademarkOffice,ownedbyTheInstituteofElectricalandElectronicsEngineers,Incorporated.Print:ISBN978-1-5044-2169-0STD21020PDF:ISBN978-1-5044-2170-6STDPD2
