数据中心的nexus 解决方案

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1、Apr.2009吴禕晟数据中心的Nexus解决方案3-TierDataCenterDesign(传统架构)核心层:ModularChassisHigh10GEDensityLowOversubscriptionLayer3LinkstoAggregationHand-offtoCampus汇聚层:ModularChassisHigh10GEDensityLayer2TrunkstoAccessDefaultGatewayforServersTypicallyAttachesServices接入层:TopofRack(ToR)BladeSwitc

2、hesasAccessLayerEnd/MiddleofRow(EoR/MoR)GEor10GEtoServersLayer2Switching从大->中->小的网络设计认为核心的设备连接最高带宽的链路，……“收敛比”逐级分配如何应对小收敛比的需求……L2域的问题(从BladeSwitch->接入SW->汇聚…)SPTvsL2MP的需求，VLAN的数量和管理……可扩展性过多的层次……管理节点的数量ToR的情况尤其突出vsMoR/EoR的布线灵活的L2分区跨L3骨干的L2连接:容灾、虚拟化的机房部署……逻辑架构和物理布线的对应示意图Pods

3、ectionusingMoRPodsectionusingToRSANIn-RackCabling10GBase-CX1Upto7mIn-RowandX-RowCabling10GBase-USR*(100musingOM3fiber)10GBase-SR(300musingOM3fiber)10GBase-LR(10kmusingSMF)布线选择Typically<100m*AvailableQ3CY09Agenda灵活的布线和机架组合：虚拟接入交换机可扩展的L2、L3网络架构VPC的应用VDC的应用和虚拟机、存储的整合其它(Netflo

4、w、CTS/SGT…)总结Nexus5K+Nexus2KFabricExtender虚拟接入交换机的方案Nexus2000FabricExtender(FEX)做为远程的线路卡来工作从Nexus5000来看,依然是集中式的管理和配置所以看上去就是一个虚拟的大交换机Nexus5000Virtualizedchassis+Nexus5000Nexus2000FabricExtender=灵活的布线选择一EoRPhysicalPod(EndofRow)TopologyServer1Server2Server3Server22NetworkNexus5

5、000/2000VirtualizedAccessSwitches2xNexus5000+12xNexus2148T576ServerportsineachN5K/N2KTVirtualizedAccessSwitch–以后会更多Only16RackUnitsrequiredtosupport576x1GE+104x10GEports(Fabricportswillbeallocatedoutofthe104x10GEports)ArchitectureaccommodatesEndofRowcentralizedcablingwherereq

6、uiredStructuredCat5ecablingextendingfromserverrackstocentralizednetworkracksFabricLinksCX-1TwinaxCuFabricLinksCX-1TwinaxCu灵活的布线选择二ToRPhysicalPod(TopofRack)TopologyServer1Server2Server3Server24NetworkVirtualizedAccessSwitchRemoteI/OModules(LineCards)-24xNexus2148TVirtualizedA

7、ccessSwitcharchitecturesupportsToRcablingplantwhererequiredAsingleSpanningTreedevice(onenodeandonesetofuplinkstotheaggregation)10GEMMOM3Fiberand/orCX-1TwinaxFabricLinksNexus5000CentralizedSwitchingFabricLocalInRackservertonetworkaccessportcabling灵活的布线选择三EoR&ToR混合布线N5K/N2KAdv

8、antages–FlexibleCablingCombinationofEoRandToRcablingNexus5000/2000MixedToR&