《千兆以太网组网》PPT课件.ppt

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1、千兆以太网组网GigabitEthernetNetworkingDavidG.CunninghamWilliamG.Lane以太网Ethernet1976XeroxPaloAltoResearchCenter1980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(Hi

2、ghspeed)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)以太网的发展进程(TheDevelopmentofEthernet)10BASE510BASE210BROAD3610Mbps,broa

3、dband,3600mCATVcable10BASE-T10Mbps,baseband,overtwotwisted-paircable100BASE-T4100BASE-FX1000BASE-CX1000BASE-LX1000Mbps,longwavelengthoveropticalfiber1000BASE-SX1000Mbps,shortwavelengthoveropticalfiberLLC--LogicalLinkControlMACControl(optional)MAC-MediaAccessControlReconci

4、liationGMIIPCSPMAPMDMDIMediumMediaDependentPHYGroupDataLinkMediumDependentInterfaceIEEE802.3以太网参考模式ReconciliationMIIPLSPMAMDIMediumReconciliationAUIPMAMDIMediumAUI1-10Mbps10Mbps100-1000MbpsGigabitEthernet-RMMACClientSublayer-LLC,BridgerentityMACControl(optional)MAC-MediaA

5、ccessControlReconciliationGMIIPCSPMAPMDMDIMediumMediaDependentPHYGroupPhysicalCodingSublayerPhysicalMediumAttachmentSub.PhysicalMediumDependentSub.MdiumIndependentInterfaceDataLinkMediumDependentInterface千兆以太参考模式协调一致1000Base-XGigabitEthernet-RMMACClientSublayer-LLC,Bridge

6、rentityMACControl(optional)MAC-MediaAccessControlReconciliationGMIIPCSPMASX-PMDSX-MDI1000Base-XPHYMdiumIndependentInterfaceDataLinkMediumDependentInterface协调一致LX-PMDLX-MDICX-PMDCX-MDILX光纤SX光纤150平衡铜缆IEEE802.31980IEEE802.3u-1995IEEE802.3x&y-1997全双工(交换机端口-网站)IEEE802.3z-1998I

7、EEE802.3ac-1998VLANtagging介质访问控制(MAC)IEEE802.3标准和增补IEEEStd.802.3-1998“InformationTechnology-Telecommunicationsandinformationexchangebetweensystems-Localandmetropolitanareanetwork-Specificrequirements-Part3:CarrieSenseMultipleAccesswithCollisionDetection(CSMA/CD)accessmeth

8、odandphysicallayerspecifications”ISO/IEC8802-3:1996IEEEdraftStd.802.3ab1000BASE-TUTP#5IEEEStd.80