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1、1,The Cisco CRS-1:技术概述Li Jiang Cheng,RST-3213,2005 Cisco Systems,Inc.All rights reserved.,Cisco Confidential,2,议程,The CRS-1 IOS-XR,WHAT WOULDYOU DOWITH90 TERABITSPERSECOND?,RST-3213,2005 Cisco Systems,Inc.All rights reserved.,Cisco Confidential,3,下一步网络核心需求“Must Have”,Massive Scale,WITH,Single-System
2、Simplicity,MASSIVE CAPACITY THAT ACTS AS A SINGLE SYSTEM,ContinuousAvailability,WITH,Service Flexibility,SERVICE FLEXIBILITY WITHOUT DISRUPTION,ServicePerformance,WITH,Service Intelligence,CAPACITY AND INVESTMENT PROTECTION FOR NEW FEATURES ANDSERVICES WITHOUT PERFORMANCE COMPROMISESMUST RESOLVE THE
3、SE INHERENTLYCONFLICTING REQUIREMENTS,RST-3213,2005 Cisco Systems,Inc.All rights reserved.,Cisco Confidential,4,重新定义IP网络:The Cisco Carrier Routing System-1,ContinuousSystemOperation,ServiceFlexibility,SystemLongevity,CISCO INNOVATIONMANY SERVICES,ONE NETWORK,LIMITLESS POSSIBILITES,RST-3213,2005 Cisc
4、o Systems,Inc.All rights reserved.,Cisco Confidential,5,The CRS-1 System Overview Line Card Switch Fabric Control Plane Mechanicals System Configurations,RST-3213,2005 Cisco Systems,Inc.All rights reserved.,Cisco Confidential,6,Cisco CRS-1 系统概述系统两大组成部分,FABRIC SHELVES Optical Backplane RedundantFans/
5、PowerFRONT:,LINE CARD SHELVES Mid-Plane Design RedundantFans/PowerFRONT:,24 Fabric cards2 SC CardsBACK:Optical FiberInterconnect Panels,100m,16 or 8 Interface Slots2 RP SlotsBACK:16 or 8 LC Slots8 or 4 Fabric Card Slots,RST-3213,2005 Cisco Systems,Inc.All rights reserved.,Cisco Confidential,7,Cisco
6、CRS-1 系统配置两种基本配置STANDALONE CONFIG(640Gbps or 1.2Tbps)16/8 LC and PLIM slots No Fabric chassis requiredMULTI-CHASSIS CONFIG(1.2Tbps TO 92Tbps)X(1 to 72)Line card chassis Y(1 to 8)fabric chassis,RST-3213,2005 Cisco Systems,Inc.All rights reserved.,Cisco Confidential,8,Cisco CRS-1 系统可扩展性容量概述SWITCH FABR
7、IC UPGRADES ARE NON-SERVICE AFFECTING,ConfigStandaloneMulti shelfRST-3213,Max BWTbps640Gbps/1.2Tbps92Tbps 2005 Cisco Systems,Inc.All rights reserved.,Max LC chassis(full LC chassis only*)172,Max FabricChassis08,Max 40GSlots8/161152Cisco Confidential,9,路由器基本体系结构3 MAIN COMPONENTS:LINE CARDS,SWITCHING
8、MECHANISM,ROUTE PROCESSOR(S)Forwarding Component,Control Components,Interconnect,RST-3213,2005 Cisco Systems,Inc.All rights reserved.,Cisco Confidential,InterfaceModule,InterfaceModule,MID-PLANE,MID-PLANE,Cisco,PSE,10,Cisco CRS-1 系统体系结构完全分布式体系结构Fabric,FLEXIBLE FORWARDINGPLANEUp to 1152 40G LineCards
9、(Independent,Line CardLine CardModular Service Card8K QsCisco,2 of 8,8 of 8S1,ChassisS2,S3,Forwarding),PSE,1 of 8,Highly programmable,8K Qs,S1,S2,S3,PSE supporting 40G LineRate performanceRobust Queuing with8K per ingress/egress,S1,S2,S3,DISTRIBUTED CONTROL PLANEMultiple control processors(minimumof
10、 144 Processors)Control SW distributed acrossall processors,MULTISTAGE SWITCH FABRIC1296x1296 non-blocking buffered fabric1:N RedundancyService Intelligence with hi/lo priority uni-cast/multicast recognition,RST-3213,2005 Cisco Systems,Inc.All rights reserved.,Cisco Confidential,11,LINE CARDS,RST-32
11、13,2005 Cisco Systems,Inc.All rights reserved.,Cisco Confidential,3,2,M,D,A,P,L,I,N,E,12,Cisco CRS-1 线卡概述物理层接口模块(PLIM)/模块化服务卡(MSC)体系结构,MODULAR SERVICES,INTERFACE,MODULAR SERVICES CARD(MSC),CARD,MODULE,Packet Switching Engine40G of line rate Forwarding capability(IPv4)Hardware based prefix lookupfor(
12、IPv4/IPv6/MPLS)Flexible microcoded massively parallel forwardingengine Extensive Queuing capability,To FabricIngressQueuingCPUCtrl,Ingress Packet FlowRX PSEL3EngineCPU,4FromPLIM,1InterfaceModuleASIC,OC192FramerandOpticsOC192FramerandOptics,8K Queues ingress/egressConfigurable Mapping 800 Mhz PPC 2GB
13、 CPU memory/2GB packet memoryPLIM&modular interfaces,FromFabricASIC5Egress Packet Flow,TX PSEL3 Engine6,ToPLIMEgressQueuing7From Fabric,8,OC192FramerandOpticsOC192FramerandOptics,4-Port OC-192c/STM-64c 16-Port OC-48c/STM-16c POS OC768c/STM256 POS 8x10GE SPA modules,RST-3213,2005 Cisco Systems,Inc.Al
14、l rights reserved.,Cisco Confidential,13,CRS-1 线卡PowerRegulatorsEgressQ,FabricQs,EgressPSE,ServiceProcessorLine CardCPU,IngressPSE,IngressQ,RST-3213,2005 Cisco Systems,Inc.All rights reserved.,Cisco Confidential,14,CRS-1 线卡概述OC768 PLIM 图片,RST-3213,2005 Cisco Systems,Inc.All rights reserved.,Cisco Co
15、nfidential,15,共享接口适配器接口处理器(SIPs)和共享接口适配器(SPAs)A SIP is a physical layer interface module(PLIM)that insertsinto a line card chassis slot like any other PLIM.It provides nonetwork connectivity on its own MSC is connected to the SIP in the same manner as thecurrent Fixed PLIMs CRS-1 SIP will house up t
16、o 6 Shared Port Adapters(SPA)which are installed in subslots.The SPA provides theinterface ports and media type SPAs may be single height or double-height depending on therequired accommodation,RST-3213,2005 Cisco Systems,Inc.All rights reserved.,Cisco Confidential,16,共享接口适配器接口处理器(SIPs)和共享接口适配器(SPAs
17、),SPA Bay 0SPA Bay 3Double HeightSPA Bay 3Double HeightSPA Bay 3,SPA Bay 1SPA Bay 4SPA Bay 1SPA Bay 4Double HeightSPA Bay 4,SPA Bay 2SPA Bay 5SPA Bay 2SPA Bay 5Double HeightSPA Bay 5,RST-3213,2005 Cisco Systems,Inc.All rights reserved.,Cisco Confidential,17,共享接口适配器接口处理器(SIPs)和共享接口适配器(SPAs)Release 3.
18、2 will support:1-Port OC-192c/STM-64c POS XFP SPA8-Port Gigabit Ethernet SPA4-Port OC-3c/STM-1 POS SPA MSC Oversubscription is supported for EthernetSPAs only More SPA variants to be supported in futurereleases,RST-3213,2005 Cisco Systems,Inc.All rights reserved.,Cisco Confidential,18,CRS-1 线卡概述SPA
19、承载卡 and SPA 模块,RST-3213,2005 Cisco Systems,Inc.All rights reserved.,Cisco Confidential,19,CRS-1 线卡概述SPA 模块4*OC3 POS1*OC192 POS8*1Gb Ethernet,RST-3213,2005 Cisco Systems,Inc.All rights reserved.,Cisco Confidential,20,Cisco CRS-1 包转发流程PSE(入口/出口)灵活的转发服务 IPv4/IPv6 Unicast MPLS6 Labels,Link Bundling(v4)L
20、oad Balancing L3(v4)Hierarchical Policing Marking TE/FRR Sampled Netflow WRED ACL IPv4/IPv6 Multicast Per prefix accounting GRE/L2TPv3 Tunneling RPF check(loose/strict)v4 Load Balancing L3(v6)Link Bundling(v6),To IngressQueuingASICFromFabricASIC,RX PSEL3 EngineTX PSEL3 Engine,FromPLIMToPLIMEgressQue
21、uing,MIDPLANE,InterfaceModuleASIC,OC192FramerandOpticsOC192FramerandOpticsOC192FramerandOpticsOC192FramerandOptics,BROAD FEATURE SUPPORT WITH PROGRAMMABILITY AND PERFORMANCE,RST-3213,2005 Cisco Systems,Inc.All rights reserved.,Cisco Confidential,Distrib,MUX,PPE2,PPE2,PPE3,PPE3,21,Cisco CRS-1 包转发流程包交
22、换引擎体系结构 Parallel Processor Architecture,IBMs Cu-11 ASIC process 188 Packet Processing Engines(PPE)Packets evenly distributed across PPEsEach PPE is a 32-bit RISC processor 250MHz48,000 MIPSFully ProgrammableTree-bit map prefix look-up HW engineIntegrated with key-off-chip memories512K entry TCAM for
23、 feature scale,PPE1PPE188,(ACLs/Netflow/Policing/etc)2M entries for IPv4/IPv6/Multicast/MPLS lookup,TCAM,PLU,TLU,STATS,1M 64Bit Stats counters,RST-3213,2005 Cisco Systems,Inc.All rights reserved.,Cisco Confidential,22,CRS-1 性能 Light Reading.第三方独立测试结果“scales to meet therequirements ofservice provider
24、s far into thefuture”“.software upgradesinterrupted the traffic foronly nanoseconds even on afully loaded,live chassis”“.scaled to terabits-per-second of bandwidth,millions of routes,and tensof millions of IPv4 and IPv6flows”“throughput capabilitiesscale to multi-chassis,http:/,configurations.”,RST-
25、3213,2005 Cisco Systems,Inc.All rights reserved.,Cisco Confidential,23,CRS-1 包转发流程Input queuing/shaping on the IngressQ,WRED,QueuesHPLPLP,Ports(Port/VLAN)MDRR/P1Shaper,FromPSE,MDRR/Shaper,P2,MDRR/AggregateShaper,Tofabric,Configurable,MDRR/Shaper,P1023,DynamicMapping ofQueues to ports,ShapingMin/max
26、BW,Max BW,RST-3213,2005 Cisco Systems,Inc.All rights reserved.,Cisco Confidential,24,CRS-1 包转发流程Output queuing/shaping on the EgressQ,WRED,Queues,Groups(VLAN/Tunnel),Ports(Port/VLAN),HP,LP,MDRR/,LP,Shaper,G1,MDRR/,P1,fromPSE,MDRR/Shaper,G2,Group,MDRR/AggregateGroup,ToPLIM,MDRR/Shaper,GX,Configurable
27、 DynamicMapping ofQueues to groups and ports,ShapingMin/max BW,MDRR/PXGroup,Max BW,RST-3213,2005 Cisco Systems,Inc.All rights reserved.,Cisco Confidential,25,SWITCH FABRIC,RST-3213,2005 Cisco Systems,Inc.All rights reserved.,Cisco Confidential,26,Cisco CRS-1 交换矩阵概述50 Gbps,40 Gbps,136 Bytes cells,Fab
28、ricChassis,100 Gbps/LC(2)(2.5X Speedup),2,8,2 of 8,8 of 8S1,S2,S3,2,16,Line Card,1,1 of 8S1,S2,S3,1,Line Card,2 LEVELS OF PRIORITYHP Low latency traffic,MULTICAST SUPPORT1M multicast groups,LP Best effort traffic,S1,S2,S3,1296 X 1296 Buffered Non-blocking SwitchMulti-stage Interconnect3 Stage Benes
29、TopologyNote:In CRS-1 16-Slot,8 Planes Are Distributed Across 8 Fabric CardsIn CRS-1 8-Slot 8 Planes Are Distributed Across 4 Fabric Cards,RST-3213,2005 Cisco Systems,Inc.All rights reserved.,Cisco Confidential,27,Cisco CRS-1 交换矩阵配置两种基本配置模式,Line CardChassis 1S1,1X,Fabric CardChassis 1S2,1X,Line Card
30、Chassis 2S1,S1,S2,S3,2X,2X,S3,S3,S1,S2,S3,S2,1.2Tbps Stand-alone,S3,S3,3-stages of fabric inLC chassis1.2 Tbps to 92 TbpsDistributed fabricOptical connection between stagesALL CONFIGURATIONS UP-GRADABLE WITHOUT SERVICE INTERRUPTION,RST-3213,2005 Cisco Systems,Inc.All rights reserved.,Cisco Confident
31、ial,FabricQ,FabricQ,Port,IngressQ,Port,IngressQ,S3,S3,S3,S3,S3,S1,S1,S1,S1,S2,S2,S2,S2,S2,S2,S2,S2,S2,S3,S3,S3,S3,S1,S1,S1,S1,28,数据流 线卡到线卡,Packet flow between LCs:Port to IngressQ,LINE CARD CHASSIS(LCC),FABRIC CARDCHASSIS(FCC),Via PSE ASICIngressQ to S1Cells via midplane to 8 LCCfabric cardsS1 to S2
32、S1 distributes cells acrosslinks to available S2sS2 to S3S2 distributes cells acrosslinks to available S3sS3 to FabricQVia midplaneFabricQ to PortVia PSE and EgressQ,S3S3S1 S3S1S1LINE CARD FABRIC CARDLINE CARD CHASSIS(LCC)S3S3S3S1 S3S1S1,S2,LINE CARD,FABRIC CARD,RST-3213,2005 Cisco Systems,Inc.All r
33、ights reserved.,Cisco Confidential,29,Cisco CRS-1 交换矩阵互联Optical Inter-ConnectionFIBER Array CABLE,12 fibers per ribbon 6 ribbons per array cable(72 fibers per array cable)CONNECTIONS PER LINE CARDCHASSIS:3 array cables per fabric card 8 fabric cards 24 array cablesCONNECTIONS PER FABRIC CARDCHASSIS
34、9 array cables per fabric card 24 fabric cards 216 array cables,Multiple Array Cablesbetween LC Chassisand FC Chassis,RST-3213,2005 Cisco Systems,Inc.All rights reserved.,Cisco Confidential,30,Cisco CRS-1 交换矩阵互联S13 和 S2 板卡图片,RST-3213,2005 Cisco Systems,Inc.All rights reserved.,Cisco Confidential,31,
35、CONTROL PLANE,RST-3213,2005 Cisco Systems,Inc.All rights reserved.,Cisco Confidential,32,Cisco CRS-1 控制平面IOS-XR 控制平面处理部件DISTRIBUTED ROUTE PROCESSORS,2 SMPs per DRP Occupy 1 MSC slot and 1 PLIM Control processing for routing protocols(BGP,OSPF,IS-IS),Network Mgt,trafficengineering(RSVP,LDP),etc Acts
36、as additional processing elementfor control processing or as boundaryfor Logical routerROUTE PROCESSORS 1 SMP per RP 2 dedicated RP slots per Line card shelf Control processing for routing protocols(BGP,OSPF,IS-IS),Network Mgt,trafficengineering,etc LC Chassis management Always in redundant configur
37、ationactive and standby,SMPSMPSMPSMPDISTRIBUTED RPsSMPSMPROUTE PROCESSORS,2 of 81 of 8,3 of 8,RST-3213,2005 Cisco Systems,Inc.All rights reserved.,Cisco Confidential,33,MECHANICALS,RST-3213,2005 Cisco Systems,Inc.All rights reserved.,Cisco Confidential,34,Cisco CRS-1 系统物理特性线卡机箱概述16 槽全高单元 Slots(Midpl
38、ane design):Front16 PLIM slots2 RP slots+2 Fan ControllersBack16 LC Slots8 Fabric cards Dimensions:23.6”W x 41*”D x 84”H(60 W x 104.2 D x 213.36H(cm)Power:12 KW(AC or DC)Weight:1600 lbs/723kg Heat Dis.:41000 BTUs*For standalone Chassis Depth=35”(no fabric chassis cable management),RST-3213,2005 Cisc
39、o Systems,Inc.All rights reserved.,Cisco Confidential,35,Cisco CRS-1 系统物理特性线卡机箱概述8 槽半高单元 Slots(Midplane design):Front8 PLIM slots2 RP slotsBack8 LC Slots4 Fabric cards Dimensions:17.5”W x 41*”D x 38.5”H(44.5 W x 104.2 D x 97.8H(cm)Power:7.5 KW(AC or DC)Weight:647 lbs/294kg Heat Dis.:25196 BTUs*For s
40、tandalone Chassis Depth=35”(no fabric chassis cable management),RST-3213,2005 Cisco Systems,Inc.All rights reserved.,Cisco Confidential,36,Cisco CRS-1 系统物理特性矩阵卡机箱概述 Slots:24 Switch Fabric(SF)BoardsHas bothS2 ASICs and OpticsBackplane design(cables blindmate torear connector modules)Dimensions:23.6”W
41、 x 41*”D x 84”H(60 W x 104.2 D x 213.36H(cm)Power:8 KW(AC or DC)Weight:1600 lbs/723kg Heat Dis.:31000 BTUs*For standalone Chassis Depth=35”(no fabric chassis cable management),RST-3213,2005 Cisco Systems,Inc.All rights reserved.,Cisco Confidential,37,线卡机箱,RST-3213,2005 Cisco Systems,Inc.All rights r
42、eserved.,Cisco Confidential,38,交换矩阵机箱,Rear,Front,RST-3213,2005 Cisco Systems,Inc.All rights reserved.,Cisco Confidential,39,CRS-1 8-槽 机架安装,RST-3213,2005 Cisco Systems,Inc.All rights reserved.,Cisco Confidential,40,SYSTEM CONFIGURATIONS,RST-3213,2005 Cisco Systems,Inc.All rights reserved.,Cisco Confi
43、dential,41,640Gbps/1.2 Tbps 系统 Standalone LC chassis8/16 LC and PLIM slots2 RP slotsNo Fabric chassis requiredS1/2/3 Fabric Cards,RST-3213,2005 Cisco Systems,Inc.All rights reserved.,Cisco Confidential,42,3.6 Tbps 系统,RST-3213,2005 Cisco Systems,Inc.All rights reserved.,Cisco Confidential,44,23 Tbps
44、系统,RST-3213,2005 Cisco Systems,Inc.All rights reserved.,Cisco Confidential,46,The clever bit:IOS-XR,RST-3213,2005 Cisco Systems,Inc.All rights reserved.,Cisco Confidential,47,ROUTER OS EVOLUTION,RST-3213,2005 Cisco Systems,Inc.All rights reserved.,Cisco Confidential,HostService,L2Drivers,Interface,I
45、GMP,LPTS,ACL,QoS,ManagementPlaneApplications,Per.fMgmt,Netflow,SNMP,Alarm,XML,SSH,SSH,SSH,HAInfrastructure,Routing,OSPF,BGB,ISIS,PIM,FIB,RIB,RIP,PFI,CLI,deliver:,Continuous operation,stack,applications,48,路由器操作系统发展,Control Plane ApplicationsForwarding Plane Applications,Control PlaneControl PlaneCon
46、trol Plane,Data PlaneData PlaneData Plane,Management PlaneManagement PlaneManagement Plane,Network Stack,SystemInfrastructure,ForwardInfrastructure,Checkpoint DBScheduler,Multicast IPCDistributed InfrastructureSynch.ServicesIPC Mech,System DBMemory Mgmt,OS SchedulerKernel System ServicesNew Router O
47、S Architecture is required to,Monolithic Kernel,Micro Kernel,Centralized Infrastructure system Distributed Infrastructure,Integrated NetworkScalability,Independent Network,Centralized Flexible service delivery stackDistributed applications Single unified system view,RST-3213,2005 Cisco Systems,Inc.A
48、ll rights reserved.,Cisco Confidential,ined,ta,FAULT,FAULT,ed,ta,rta,ed,FAULT,tart,Co,ide,tion,49,IOS XR 软件体系结构概述选择正确的操作系统以满足CRS-1的需要,TRUE Microkernel(Mach,QNX)MMU with full protectionApplications,drivers,and protocolsare protected,ProcessManager,Filesystem,Contartable)(Res,Application,DriverContain
49、 ble)(Res,Monolithic Kernel(BSD/Linux,NT)MMU with partial protection,Contain ble)Application(Res,Application,Applications are protected 2005 Cisco Systems,Inc.All rights reserved.RST-3213,Syst,Kernelem W,rrupFilesystem,NetworkFAULT Driver,Cisco Confidential,50,IOS XR 核心优势,FEATUREPreemptive scheduler
50、 with support for process priorityProtected memory architecture for application processesProtected memory architecture for system processesFault protection for application processesFault protection for Kernel processesFault protection for Host StackFault protection for device driversFault protection
