千兆以太网组网课件

千兆以太网组网

GigabitEthernetNetworkingDavidG.CunninghamWilliamG.Lane以太网Ethernet 1976XeroxPaloAltoResearchCenter1980年，DEC、Intel和Xerox提出以太网协议标准。以太网的设计目标(TheoriginalEthernetgoals)：简单(Simplicity)价格低(Lowcost)兼容性(Compatibility)寻址灵活(Addressingflexibility)公平性(Fairness)先进性(Progress)高速(Highspeed)低时延(Lowdelay)稳定性(Stability)可维护性(Maintainability)层次结构(Layerarchitecture)以太网的(TheEthernetNon-goals)全双工(Full-duplex)差错控制(ErrorControl)安全性(Security)速率灵活性(SpeedFlexibility)优先级(Priority)不设防(HostileUser)LLC--LogicalLinkControlMACControl(optional)MAC-MediaAccessControlReconciliationGMIIPCSPMAPMDMDIMediumMediaDependentPHYGroupDataLinkMediumDependentInterfaceIEEE802.3以太网参考模式ReconciliationMIIPLSPMAMDIMediumReconciliationAUIPMAMDIMediumAUI1-10Mbps10Mbps100-1000MbpsGigabitEthernet-RMMACClientSublayer-LLC,BridgerentityMACControl(optional)MAC-MediaAccessControlReconciliationGMIIPCSPMAPMDMDIMediumMediaDependentPHYGroupPhysicalCodingSublayerPhysicalMediumAttachmentSub.PhysicalMediumDependentSub.MdiumIndependentInterfaceDataLinkMediumDependentInterface千兆以太参考模式协调一致1000Base-XGigabitEthernet-RMMACClientSublayer-LLC,BridgerentityMACControl(optional)MAC-MediaAccessControlReconciliationGMIIPCSPMASX-PMDSX-MDI1000Base-X PHYMdiumIndependentInterfaceDataLinkMediumDependentInterface协调一致LX-PMDLX-MDICX-PMDCX-MDILX光纤SX光纤150平衡铜缆IEEE802.3标准和增补IEEEStd.802.3-1998“InformationTechnology-Telecommunicationsandinformationexchangebetweensystems-Localandmetropolitanareanetwork-Specificrequirements-Part3:CarrieSenseMultipleAccesswithCollisionDetection(CSMA/CD)accessmethodandphysicallayerspecifications” ISO/IEC8802-3:1996IEEEdraftStd.802.3ab1000BASE-TUTP#5IEEEStd.802.3ac-1998VirtualBridgedLANtaggingon802.3NetworksIEEEStd.802.3ad:LinkaggregationPreSFDDASAL/TDataPADFCSExt基本MAC帧格式和传输顺序传输顺序：自左至右，比特流帧开始界符101010117166246-15004BytesO1O0MostSignificantOctetLeastSignificantOctetb0b7LSBMSBMSBLSB千兆以太网slottime大于分组传输所需时间，半双工，则在FCS后附加填充比特。Pr帧头10101010......10101010SD帧开始符....10101011DA,SA

1GLxxxxxxG=0单独地址L=0全局

G=1组地址L=1局部L长度字段IEEE802.31500type类型字段Ethernet1536FCS帧校验序列公司号网卡号PreSFDDASAL/T

FCSExt8808.MSO0100LSO1Byte1ByteMAC控制帧格式MAV控制操作码操作码参数60octets2bytes0001000100000001PreSFDDASAL/T

FCSExt8808.MSO0100LSO1Byte1ByteMAC控制(pause)帧格式MAV控制操作码00-01pausetime60字节2bytes0001000100010000LSBMSBPreSFDDASAL/TDataPADFCSExt802.1QTagtypeTagControlinfo.MSO0100LSO07LSbMSb81-002Byte2Byte1000-00010000-0000(33024)VLAN-TaggedMAC帧格式42-1496Octets

IEEE802.1QTagPreSFDDASAL/TDataPADFCSExt802.1QTagtypeTagControlinfo.2Byte2ByteCFI

VLANidentifier3b412bitb8b11b7b0VLAN-TaggedMAC控制信息字段(802.3)UserPriorityb0b2VLANidentifier帧类型判别如帧内Length/Type字段的值

1500LLC数据帧=34824(88-08)MAC控制帧=33024(81-00)VLAN-tagged帧8B10B编码07651243AHGFBCED5B6B编码3B4B编码afibcedjhataLabelDataBitCurrentRD(-)CurrentRD(+) EDCBAabcdeiabcdeiD0 00000 100111 011000D1 00001 011101 100010D2 00010 101101 010010D3 00011 110001 110001D4 00100 110101 001010D5 00101 101001 101001D6 00110 011001 011001D7 00111 111000 0001115B6B数据编码1DataLabelDataBitCurrentRD(-)CurrentRD(+) EDCBAabcdeiabcdeiD8 01000 111001 000110D9 01001 100101 100101D10 01010 010101 010101D11 01011 110100 110100D12 01100 001101 001101D13 01101 101100 101100D14 01110 011100 011100D15 01111 010111 1010002DataLabelDataBitCurrentRD(-)CurrentRD(+) EDCBAabcdeiabcdeiD16 10000 011011 100100D17 10001 100011 100011D18 10010 010011 010011D19 10011 110010 110010D20 10100 001011 001011D21 10101 101010 101010D22 10110 011010 011010D23 10111 111010 0001013DataLabelDataBitCurrentRD(-)CurrentRD(+) HGFfghifghi.1 000 1011 0100.1 001 1001 1001.2 010 0101 0101.3 011 1100 0011.4 100 1101 0010.5 101 1010 1010.6 110 0110 0110.7 111 1110or0111 0001or1000DataLabelDataBitCurrentRD(-)CurrentRD(+) EDCBAabcdeiabcdeiK23 10111 111010 000101K27 11011 110110 001001K28 11100 010110 110000K29 11101 110110 010001K30 11110 011110 1000015B6B特定组编码公共物理子层：协调一致(Reconciliation)和 千兆介质独立接口(GMII)MACClientSublayer-LLC,BridgerentityMACControl(optional)MAC-MediaAccessControlReconciliationGMIIPCSPMASX-PMDSX-MDI1000Base-X PHYMdiumIndependentInterfaceDataLinkMediumDependentInterface协调一致LX-PMDLX-MDICX-PMDCX-MDILX光纤SX光纤150平衡铜缆

GMIIPLS_DATA.request(OUTPUT_UNIT)PLS_Signal.indicate(SIGNAL_STATUS)PLS_DATA.Indicate(INPUT_UNIT)PLS_CARRIER.indicate(CARRIER_STATUS)PLS_DATA_VALID.indicate(DATA_VALID_STATUS)ReconciliationSub.StationMng.PCS:PhysicalCodingSublayerCollisionDetectionTxD(Data、Control、Clock)RxD(Data、Control、 Clock)CarrierSenseMngDataI/OandControlMAC物理层信令(PLS)物理编码、物理介质附加和自动协商：MACClientSublayer-LLC,BridgerentityMACControl(optional)MAC-MediaAccessControlReconciliationGMIIPCSPMASX-PMDSX-MDI1000Base-X PHYMdiumIndependentInterfaceDataLinkMediumDependentInterface协调一致LX-PMDLX-MDICX-PMDCX-MDILX光纤SX光纤150平衡铜缆MemoryMemoryLANControlChipMemoryMemorySERDESChip10bits10bits并行接口收发器PMDPMAPCSMAC物理层数据链路层MAC、存储和接口逻辑8B10B编/解码串行接口物理编码子层(PhysicalCodingSub_layer)TransmitCarrierSenseReceiveAuto-NegoSynctx_code-group<9:0>rx_code-group<9:0>SIGNAL_DETECTSync_statusRxD<7:0>TxD<7:0>COLCRSTX_ENTX_ERGTX_CLKRX_DVRX_ERRX_CLKTransmittingRecievingXmitseenote并行接口PMA:PhysicalMediumAttachmentCode-groupAligmentP-S变换S-P变换LoopBackTx_bitRx_bit1250Mcode-bit/sSIGNAL_DETECTSync.PMD:PhysicalMediumDependentSublayerTransmitterTx_bitRx_bit1250Mcode-bit/sSIGNAL_DETECTRecieveTransmitsignalReceivesignalPMDMDI