5千兆以太网组网ppt课件

《5千兆以太网组网ppt课件》由会员分享，可在线阅读，更多相关《5千兆以太网组网ppt课件（41页珍藏版）》请在装配图网上搜索。

1、千兆以太网组网Gigabit Ethernet NetworkingDavid G.CunninghamWilliam G.Lane 以太网 Ethernet 1976 Xerox Palo Alto Research Center 1980年，DEC、Intel 和 Xerox提出以太网协议标准。以太网的设计目标(The original Ethernet goals)：简单(Simplicity)价格低(Low cost)兼容性(Compatibility)寻址灵活(Addressing flexibility)公平性(Fairness)先进性(Progress)高速(High speed

2、)低时延(Low delay)稳定性(Stability)可维护性(Maintainability)层次结构(Layer architecture)以太网的(The Ethernet Non-goals)全双工(Full-duplex)差错控制(Error Control)安全性(Security)速率灵活性(Speed Flexibility)优先级(Priority)不设防(Hostile User)以太网的发展进程(The Development of Ethernet)10BASE5 10BASE2 10BROAD36 10Mbps,broadband,3600mCATV cable

3、10BASE-T 10Mbps,baseband,over two twisted-pair cable 100BASE-T4 100BASE-FX 1000BASE-CX 1000BASE-LX 1000Mbps,long wavelength over optical fiber 1000BASE-SX 1000Mbps,short wavelength over optical fiberLLC-Logical Link ControlMAC Control(optional)MAC-Media Access ControlReconciliationGMIIPCSPMAPMDMDIMe

4、diumMedia DependentPHY GroupData LinkMedium Dependent InterfaceIEEE 802.3 以太网 参考模式ReconciliationMIIPLSPMAMDIMediumReconciliationAUIPMAMDIMediumAUI1-10 Mbps 10 Mbps100-1000MbpsGigabit Ethernet-RMMAC Client Sublayer-LLC,Bridger entityMAC Control(optional)MAC-Media Access ControlReconciliationGMIIPCSPM

5、APMDMDIMediumMedia DependentPHY GroupPhysical Coding SublayerPhysical Medium Attachment Sub.Physical Medium Dependent Sub.Mdium Independent InterfaceData LinkMedium Dependent Interface千兆以太参考模式协调一致1000 Base-X Gigabit Ethernet-RMMAC Client Sublayer-LLC,Bridger entityMAC Control(optional)MAC-Media Acce

6、ss ControlReconciliationGMIIPCSPMASX-PMDSX-MDI1000 Base-X PHYMdium Independent InterfaceData LinkMedium Dependent Interface协调一致LX-PMDLX-MDICX-PMDCX-MDILX 光纤SX 光纤150 平衡铜缆 IEEE 802.3 1980 IEEE 802.3u-2019 IEEE 802.3x&y-2019 全双工(交换机端口-网站)IEEE 802.3z-2019 IEEE 802.3ac-2019 VLAN tagging 介质访问控制(MAC)IEEE 8

7、02.3标准和增补 IEEE Std.802.3-2019 “Information Technology-Telecommunications and information exchange between systems-Local and metropolitan area network-Specific requirements-Part 3:Carrie Sense Multiple Access with Collision Detection(CSMA/CD)access method and physical layer specifications”ISO/IEC 880

8、2 -3:2019 IEEE draft Std.802.3 ab 1000 BASE-T UTP#5 IEEE Std.802.3ac-2019 Virtual Bridged LAN tagging on 802.3 Networks IEEE Std.802.3ad:Link aggregation PreSFD DA SAL/TData PADFCSExt根本 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 101010117166246-15004 BytesO1 O0Most Significant OctetLeast Significant Octetb0 b7L

9、SBMSBMSB LSB千兆以太网 slot time 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 10101010.10101010 SD 帧开始符 .10101011DA,SA 1G Lxxxxxx G=0 单独地址 L=0 全局 G=1 组地址 L=1 部分 L 长度字段 IEEE 802.3 1500type 类型字段 Ethernet 1536FCS 帧校验序列公司号网卡号什么是 slot-time？slot-time 是冲突窗口标准所用的参数名。参 数 10Mbps 100Mbps 1000Mbps隙时(Slot time)51.2 s 帧间隔(Inter

10、Frame Gap)9.6 s 尝试次数(Attempt Limit)16 退避次数(Back off Limit)10 阻塞信号(Jam Size)32bits Max Frame Size 1518 bytes Min Frame Size 64 bytes 地址长度(Address Size )6 bytes512 bit times 0.96 s 16 10 32bits 1518bytes 64bytes 4096 bit times 0.96 s 16 10 32bits 1518bytes 64bytes PreSFD DA SAL/T FCSExt8808.MSO 01 00

11、LSO1 Byte1 ByteMAC 控制帧格式MAV控制 操作码操作码参数 60 octets2 bytes 00010001 00000001 PreSFD DA SAL/T FCSExt8808.MSO 01 00 LSO1 Byte1 ByteMAC 控制(pause)帧格式MAV控制操作码 00-01pause time 60 字节2 bytes 00010001 00010000 LSBMSBPreSFD DA SAL/TData PADFCSExt802.1Q Tag typeTag Control info.MSO 01 00 LSO07LS b MS b81-002 Byte

12、2 Byte1000-0001 0000-0000(33024)VLAN-Tagged MAC 帧格式42-1496 Octets IEEE 802.1QTagPreSFD DA SAL/TData PADFCSExt802.1Q Tag typeTag Control info.2 Byte2 ByteUser Priority CFIVLAN identifierb2b0b11b0VLAN-Tagged MAC 控制信息字段(802.1Q)CFI:Canonical Format Indicator 用于指示在MAC Client 数据字段内有无 路由信息字段(RIF)。用户优先级：0-7

13、，7为高优先级。MSOLSOPreSFD DA SAL/TData PADFCSExt802.1Q Tag typeTag Control info.2 Byte2 ByteCFI VLAN identifier3b412 bitb8b11b7b0VLAN-Tagged MAC 控制信息字段(802.3)User Priority b0 b2VLAN identifier帧类型判别 如帧内 Length/Type 字段的值 1500 LLC 数据帧 =34824(88-08)MAC 控制帧 =33024(81-00)VLAN-tagged 帧 8B10B编码 07651243AHGFBCED5

14、B6B编码3B4B 编码afibcedjhg17623541098 8B10B码表：256种组合 数据码组(标为 D)：用于数据传输；特定控制码组(标为K)：控制序列传输(comma,ordered-sets,and so forth)；码组名 Octet 值 HGF EDCBA abcdei fghj RD(-)abcdei fghj RD(+)D0.0 00 000 00000 100111 0100 011000 1011D20.1 34 001 10100 001011 1001 001011 1001D10.3 6A 011 01010 010101 1100 010101 0011

15、(34)H =52 20+32(6A)H=106 10+(32x3)Data Label Data Bit Current RD(-)Current RD(+)EDCBA abcdei abcdeiD0 00000 100111 011000 D1 00001 011101 100010 D2 00010 101101 010010 D3 00011 110001 110001 D4 00100 110101 001010 D5 00101 101001 101001 D6 00110 011001 011001 D7 00111 111000 0001115B6B 数据编码1Data Lab

16、el Data Bit Current RD(-)Current RD(+)EDCBA abcdei abcdeiD8 01000 111001 000110 D9 01001 100101 100101 D10 01010 010101 010101 D11 01011 110100 110100 D12 01100 001101 001101 D13 01101 101100 101100 D14 01110 011100 011100 D15 01111 010111 1010002Data Label Data Bit Current RD(-)Current RD(+)EDCBA a

17、bcdei abcdeiD16 10000 011011 100100 D17 10001 100011 100011 D18 10010 010011 010011 D19 10011 110010 110010 D20 10100 001011 001011 D21 10101 101010 101010 D22 10110 011010 011010 D23 10111 111010 0001013Data Label Data Bit Current RD(-)Current RD(+)EDCBA abcdei abcdeiD24 11000 110011 001100 D25 110

18、01 100110 100110 D26 11010 010110 010110 D27 11011 110110 001001 D28 11100 001110 001110 D29 11101 101110 010001 D30 11110 011110 100001 D31 11111 101011 0101004Data Label Data Bit Current RD(-)Current RD(+)HGF fghi fghi.1 000 1011 0100 .1 001 1001 1001 .2 010 0101 0101 .3 011 1100 0011 .4 100 1101

19、0010 .5 101 1010 1010 .6 110 0110 0110 .7 111 1110 or 0111 0001 or 1000Data Label Data Bit Current RD(-)Current RD(+)EDCBA abcdei abcdeiK23 10111 111010 000101 K27 11011 110110 001001 K28 11100 010110 110000 K29 11101 110110 010001 K30 11110 011110 1000015B6B 特定组编码.1 000 1011 0100 .1 001 1001 1001 .

20、2 010 1010 0101 .3 011 1100 0011 .4 100 1101 0010 .5 101 0101 1010 .6 110 1001 0110 .7 111 0111 1000Data Label Data Bit Current RD(-)Current RD(+)HGF fghi fghi3B4B 特定组编码千兆以太网8B10B 码特性：High transition density of 3-8 transitions per 10-bit code group DC balance;maximum run length of 5;maximum running

21、digital sum(RDS)of 3 Separate code-group for data and control signaling A comma for code-group synchronization Excellent error detection capabilities,especially with CRC 32,the frame check sequence in the MAC frame format IBM research Lab 公共物理子层：协调一致(Reconciliation)和 千兆介质独立接口(GMII)MAC Client Sublaye

22、r-LLC,Bridger entityMAC Control(optional)MAC-Media Access ControlReconciliationGMIIPCSPMASX-PMDSX-MDI1000 Base-X PHYMdium Independent InterfaceData LinkMedium Dependent Interface协调一致LX-PMDLX-MDICX-PMDCX-MDILX 光纤SX 光纤150 平衡铜缆 G M I IPLS_DATA.request(OUTPUT_UNIT)PLS_Signal.indicate (SIGNAL_STATUS)PLS_

23、DATA.Indicate(INPUT_UNIT)PLS_CARRIER.indicate (CARRIER_STATUS)PLS_DATA_VALID.indicate (DATA_ VALID_STATUS)Reconciliation Sub.Station Mng.PCS:Physical Coding SublayerCollision DetectionTxD(Data、Control、Clock)RxD(Data、Control、Clock)Carrier SenseMng Data I/O and ControlMAC物理层信令(PLS)物理编码、物理介质附加和自动协商：MAC

24、 Client Sublayer-LLC,Bridger entityMAC Control(optional)MAC-Media Access ControlReconciliationGMIIPCSPMASX-PMDSX-MDI1000 Base-X PHYMdium Independent InterfaceData LinkMedium Dependent Interface协调一致LX-PMDLX-MDICX-PMDCX-MDILX 光纤SX 光纤150 平衡铜缆MemoryMemoryLAN Control ChipMemoryMemorySERDES Chip10bits10bi

25、ts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(Physical Coding Sub_layer)TransmitCarrier SenseReceiveAuto-NegoSynctx_code-grouprx_code-groupSIGNAL_DETECTSync_statusRxDTxDCOLCRSTX_EN TX_ER GTX_CLKRX_DV RX_ER RX_CLKTransmittingRecievingXmitsee note并行接口PMA:Physical Medium AttachmentCode-gr

26、oup AligmentP-S变换S-P变换Loop BackTx_bit Rx_bit 1250 M code-bit/sSIGNAL_DETECTSync.PMD:Physical Medium Dependent SublayerTransmitterTx_bit Rx_bit 1250 M code-bit/sSIGNAL_DETECTRecieveTransmit signalReceive signalPMDMDI光物理介质相关(Optical PMD)子层：光纤(Optical-fiber)光缆和短接线(Cable and patch cords)连接器(Connectors)光

27、发送器(Optical transmitter)激光源(Laser light source)激光-纤耦合镜(Laser-to-fiber coupling optics)激光驱动电路(Laser-drive circuitry)MDI连接器座(MDI connector receptacle)光接收器(Optical receiver)MDI connector receptacle 光检测器(Photo detector)前置放大和均衡器(Preamplifier and equalizer)电脉冲再生(Electrical pulse regenerator)PMDTxT+T-PMDRx

28、R+R-spliceccsppatch cords光缆MDIMDIISO/IEC 11801 ：ChannelSX：62.5um MMF(160/500)Mhz.km SX：62.5um MMF(200/500)Mhz.km LX：62.5um MMF(160/500)Mhz.km LX：50um MMF(400/400)Mhz.km SX：50um MMF(400/400)Mhz.km SX：50um MMF(500/500)Mhz.km LX:10 um SMF300m500m5 kmShort wavelengthLong wavelength1000 BASE-CX 铜缆链路模式Tx电路Rx电路T+T-R+R-MDI25m脉冲激光光接收器处理单元耦合器显示OTDR：Optical Time Domain ReflectometerOTDRcreflectionloss间隔相对反散射(Back-scatter)dbsplicepatch cord