《网络培训教材》PPT课件.ppt

四川电信CRS-1培训教材,四川电信思科NOS服务组,目录,CRS-1介绍CRS-1 IOS-XR介绍CRS-1 IOS-XR基本配置CRS-1 IOS-XR 软件安装介绍CRS-1 IOS-XR 安全配置CRS-1 IOS-XR 路由协议配置CRS-1 IOS-XR RPL配置介绍,Cisco CRS-1 Routing System-Overview,Next Generation Core40 Gbps routingMultishelf scaleFoundation for core consolidation,CRS-1,Cisco CRS-1 System Configurations,Single Shelf System8 or 16 MSC and PLIM slotsNo Fabric chassis required4 or 8-Fabric cards in line card chassis,Multishelf System(1.2T TO 92T)2 to 72 16-slot line card chassis1 to 8 fabric chassis,Cisco CRS-1 Multishelf Systems,Switch FabricFiber cables are used to interconnect LC through SFCInterchassis management system control plane traffic does not pass through fiber cables,Cisco CRS-1 Line Card Chassis,CRS-1 8-slot,CRS-1 16-slot,Cisco CRS-1 Interfaces,PLIMs16-port OC-48c/STM-16c POS/DPT4-port OC-192c/STM-64c POS/DPT1-port OC-768c/STM-256c POS/DPT8-port 10 Gigabit EthernetSPA Interface Processor-8008-port Gigabit Ethernet SPA4-port OC-3c/STM-1c POS SPA1-Port OC-192c/STM-64c POS SPA,CRS-1 16-slot Line Card Chassis,Midplane design with front&rear accessFront16 PLIM slots2 RP slots+2 Fan ControllersBack 16 MSC Slots8 Fabric cardsDimensions:23.6”W x 41*”D x 84”H(60 W x 104.2 D x 213.36H(cm)Power:13.2 KW(AC or DC)Weight:1600 lbs/723kgHeat Dis.:41000 BTUs,PLIM Side Components,1,2,3,4,5,MSC Side Components,1,2,3,4,5,6,CRS-1 16 Slot Cable Management(for print),Cable-management bracket has telescoping feature that allows bracket to be extended when chassis is upgraded with higher-density cards.,CRS-1 16 Slot Cable Management,Cable-management bracket has telescoping feature that allows bracket to be extended when chassis is upgraded with higher-density cards.,CRS-1 16 Slot Cable Management,Cable-management,CRS-1 16 Slot Line Card Chassis Slot Numbering,Line Card Chassis Power System-Overview,Power System is fully redundant and is comprised of:AC or DC power shelves3 AC rectifiers or DC PEMs per shelfAlarm modulesDual bus barsChassis midplaneSpecial components on cards or modules,like DC-to-DC converters,or ORing diodes or EMI filters,Power Architecture,Power system architecture provides fully redundant AC or DC powerLine card chassis still operates normally if:One AC rectifier or DC PEM failsOne entire power shelf fails,or one bus bar failsFor system degradation to occur requires two failures:In both the A and B sides of power architecture that effect the same load zoneSame architecture used for both AC and DC powered line card chassisThree different types of power shelves;DC,AC Wye and AC Delta,Power Distribution(For Print),Power Distribution,Power Shelf/Load Zones,Line Card Chassis Load Zones(use for print),Line Card Chassis Load Zones,CRS-1 16-Slot DC Power System-Overview,DC power system provides 13,200 watts maximumTwo DC power shelves per chassis provides 2N redundancyEach DC power shelf houses:Input power connectorsIts own shelf circuit breakerThree DC power entry modules(PEMs)Each PEM is field replaceableEach PEM has its own circuit breakerAlarm modulePower distribution connections and wiringPower shelf installs in chassis from the front and plugs into chassis power interface connector panel,DC Power Shelf Input Connectors,Grnd 6 Input Connectors,DC Power Shelf Architecture,DC PEM,LEDs,DC PEM Status Monitoring,The Power Shelf service processor circuitry monitors the following DC PEM fault and alarm conditions:FaultDC input failCircuit breaker tripOver temperaturePEM presentVoltage and current monitoring signals,DC PEM Status Indicators&Meanings,Alarm Module,Ext.Alarm connectorLED IndicatorsAlpha Indicators,Alarm Module Functions,The alarm module performs the following functions:Alarm outputs for both LEDs and relay LEDsAlphaRelayAlarm Relay connector is DA-15SOnly SELV circuits connect to Alarm ModulePEM or AC Rectifier Status MonitoringAlarm monitoring,Status Monitoring,Alarm module responsible for monitoring AC rectifiers or DC PEMs plugged into the power shelf it sharesThe monitored parameters include:Circuit Breaker Tripped conditionsPower GoodPower FailInternal FaultOver Temp conditionsAC rectifier or PEM presenceVoltage and current output levelsHas a backup power connection to the neighboring power shelf,CRS-1 16-Slot Line Card Chassis Cooling System-Overview,The complete line card chassis cooling system includes:Two fan traysTwo fan controller cardsTemperature sensors distributed on cards and modules in the chassisThe operating software that controls the cooling systemAn air filterInlet and outlet air vents and bezelsImpedance carriers for empty chassis slotsPower module cooling fans,Line Card Chassis Airflow,Fan Control Architecture,The fan control architecture:Controls fan speed to optimize cooling,acoustics,and power consumption for various chassis-heating conditionsMonitors the cooling system with temperature sensors on modules and cardsIs redundant from both a power and cooling standpointSupports a redundant load-sharing design that contains:Two fan trays,each containing nine fansTwo fan controller cardsControl software and logicThere are four normal operating fan-speeds,plus one high-speed setting used when a fan tray has failed.,Line Card Chassis Fan Tray,The two fan trays:Are interchangeablePlug into the rear of LC chassisEach line card chassis fan tray contains:Nine fansA front-panel status LED,Status,Status LED,Line Card Chassis Fan Controller Card,BITs/SETsExt.Clk 1,BITs/SETsExt.Clk 2,Status LEDs,Fan Controller Card Operation,Fans run at 4300 to 4500 RPM at initial power upFan control software takes control of fan speed once the system is initialized(could take 3 to 5 minutes)Fan controller cards and fan trays have quick-shutdown mode to aide in OIRQuick-shutdown mode minimizes inrush current during hot swap or OIR,Cooling System Redundancy,The redundancy design in the cooling subsystem can tolerate:A single fan tray failureA single fan failureA single fan controller board failureA single fan cable failureA single power shelf,or a single power module(PEM or AC rectifier)to fail without impacting routing system or line card chassis availability,Thermal Sensors,Thermal sensors on each board in system monitor temperatures throughout chassisThree types of sensors in the chassis:InletExhaustHot spotAny sensor can send a thermal alarmWhen thermal alarm occurs fault condition passed to SP on each fan controller board for control software to takes appropriate action,Fan Control Redundant Power,Each fan controller card receives 48 VDC from individual load zones on midplaneEach load zone gets DC power from both the A and B power shelves.Upper fan tray powered from“A”bus on one fan controller card and from“B”bus on second fan controller card Two DC-to-DC converters,one on each fan controller card,control a single fan,S123 Switch Fabric Card,PLIM,PLIM,MSC,MSC,Ingress,Egress,IP Data,IP Data,Linecard Chassis,Switch Fabric Card,1 of 8,S2,S2,S3,S3,S1,S1,S123 Switch Fabric Card,S123 switch fabric card only used in single-chassis systemsMajor components of S123 switch fabric card are:Switch elements that perform switching functionsService processorPower modulesStatus LEDAlphanumeric displayS1,S2,and S3 elements perform switching functions and are programmed at system startup by IOS XR fabric management softwareEach S123 switch fabric card contains two S1,two S2,and four S3 elements.,S123 Functional Blocks,Slots 0-7Ingress from MSCsSlots 8-17(To fabric),EgressToMSCs and RPS(From Fabric),Note:Slots 16&17 are the active and standby RPs,S123 Physical Overview,Status LED,Alpha,Route Processor(RP)Overview,The RP combines system controller functionality with route processing capabilityEach 16-Slot Line Card Chassis contains two route processor(RP)cards that:One RP serves as the active master,while the other serves as the standby unitAre located in dedicated slots the front side of the chassis in the center of the lower PLIM card cageDistribute forwarding tables to the line cardsProvide a control path to each MSCProvide the system-monitoring functionsContain the hard disks for system and error logging,RP Front Panel and Memory Options,MemoryModules,SMPCPUs,RP IDE hard drive:Used for storing debug info,such as,core dumps from RP or MSCsTypically only active when neededHot-pluggable and sled mounted,PCMCIA Flash Slots,PCMCIA FlashEach RP provides two ATA type PCMCIA flash slots to store up to 1 GB storage systemsDisk0:is fixed and used for permanent storage of configuration and image files required for operation of OSDisk1:is an externally accessible media slot,RP Block Diagram,PCMCIA2,IDE,Qlinks,LC FElinks,CTL GE link,CTL GE link,Midplane,PCI,Aux and console,Management GE link,Card presence detectRP mastershipPROM presence,RP Block Diagram(Cont.),PCMCIA2,IDE,Qlinks,LC FElinks,CTL GE link,CTL GE link,Midplane,PCI,Aux and console,Management GE link,Card presence detectRP mastershipPROM presence,Route Processor(RP)Active and Standby Arbitration,The active-standby arbitration algorithm performed by hardware and software:At chassis power up,each RP boots and runs self-tests.The RPs exchange messages with each other and with SPs on all other boards.Each RP examines its outgoing“Reset”lines to verify that they are inactive.Based on results of these tests,each RP decides whether it is ready to become the active RP.If it is,it asserts“Ready”signal to its on-board arbitration unit that propagates“Ready”signal to other RP.Arbitration hardware chooses active RP.Hardware asserts“Active”signal to chosen RP,along with an interrupt and propagates“Active”signal to other RP,which also receives an interrupt.If a tie,“Active”is RP in lower numbered slot.Software on each reads its“Active”signal,and branches accordingly to“Primary”or“Standby”code.If active RP is removed,powered down,or voluntarily de-asserts its“Ready”signal,standby RP immediately receives an asserted“Active”signal,along with an interrupt.,目录,CRS-1介绍CRS-1 IOS-XR介绍CRS-1 IOS-XR基本配置CRS-1 IOS-XR 软件安装介绍CRS-1 IOS-XR 安全配置CRS-1 IOS-XR 路由协议配置CRS-1 IOS-XR RPL配置介绍,Cisco IOS XR Architecture,Distributed infrastructure,Runs onmultiple CPUs,High-Availability(HA)Components,KernelPlane separationFault tolerance and isolationCheckpoint support for process restartProcess-level redundancyRoute processor and Distributed RP failoverNonstop forwarding,Kernel,Memory-protection,message-passing,pre-emptiveModular software designAll basic OS and router functionality implemented as processesProcess model with separate,protected address spaces,Microkernel:ThreadsSchedulingDebugTimers,Message queues,Synchronization,Distributed processing,File system,Lightweight messaging,Event management,C,I,S,C,O,P,O,S,I,X,Applications,Plane Separation,Microkernel,Process mgmt,IPC mech.,Memory mgmt.,H/W abstraction,Memory-protected microkernel,Distributed subsystems/processes,System services,Control plane,Fault Tolerance and Isolation(For Print),Layered rather than monolithic architecture,Fault isolation and protection between the planes,Cisco IOS XR,Fault Tolerance and Isolation,Layered rather than monolithic architecture,Fault isolation and protection between the planes,Cisco IOS XR,Checkpoint Support for Process Restart,Process,Checkpoint shared memory store,Updates of running state,New instance of process,Recover state,Active RP/DRP,Process-Level Redundancy,Standbyprocess,Activeprocess,Active service-providing process,Standby process,Active process uses a checkpoint database to share running state with standby,Client,Client,Client,Clients use active service-providing process,Process-Level Redundancy(Cont.),1.Active process fails,Client,Client,Client,5.Clients use new active service-providing process,4.New active starts sending updates to standby process,Activeprocess,Standbyprocess,New activeprocess,3.New standby process is started,2.Standby process becomes active,PRINT ONLY!,1.Active process fails,Client,Client,Client,5.Clients use new active service-providing process,4.New active starts sending updates to standby process,Activeprocess,Standbyprocess,New activeprocess,3.New standby process is started,2.Standby process becomes active,Process Restart and RecoveryRP Failure,Process A:checkpoint data sent to standby peer continuallyProcess B:checkpoint data mirrored to standby cardProcess C:no checkpointing-process C started on standby cardProcess D:no checkpointing-no process D started on standby card,Process A,Process B,Process C,Process A,Process B,Process C,Process,D,Active card,Standby card,RP and DRP Failover(for print),Active RP,Standby RP,Checkpointed,RP failure,If no standby DRP exists,no checkpointing,Active DRP,Standby DRP,Active DRP,DRP failure,Checkpointed,Notcheckpointed,RP and DRP Failover,Active RP,Standby RP,Checkpointed,RP failure,If no standby DRP exists,no checkpointing,Active DRP,Standby DRP,Active DRP,DRP failure,Checkpointed,Notcheckpointed,Nonstop Forwarding,Paired RPs or DRPsEach LC has dedicated packet forwarding hardware(PSE)Packet forwarding is not affected by:ISIS,OSPF,BGP,MPLS,Multicast process restartInfrastructure process restartsRP failover,LC,LC,RP,RP,ButFwdingOk!,Active,Active,Standby,PRINT ONLY!,Paired RPs or DRPsEach LC has dedicated packet forwarding hardware(PSE)Packet forwarding is not affected by:ISIS,OSPF,BGP,MPLS,Multicast process restartInfrastructure process restartsRP failover,LC,LC,RP,RP,ButFwdingOk!,Active,Active,Scalability Features,Adjacency managementForwarding Information Base tablesDistributed interface managementDistributed configuration managementTwo-stage forwarding,Adjacency Management,Adjacency InformationBase,Modular services card(MSC),ARP/Maptables,Interface manager,RP,Two-Stage Forwarding,What is two-stage forwarding?Forwarding lookup is done twiceIngress side Lookup returns information to forward packet to correct outbound MSC and physical interfaceEgress side Lookup gets correct interface and adjacency informationWhy two-stage forwarding?ScalingWith the number of cards/interfaces in a CRS-1,the amount of forwarding information for each MSC must be limitedEntire Layer 2 adjacency information is not required on all cardsExample:Feature scalingInput ACLs on ingress cardsOutput ACLs on egress cards,Forwarding Information Tables,MSC-CPU,RP or DRP,Switch fabric,MSC-PSE,Interface driver,MSC,Distributed Interface Management,RP,Interface manager,Interface driver,MSC,Interface manager,Interface manager,Interfaces,Interfaces,Interface manager global database,Interface driver,Distributed Configuration Management,RP,Configuration manager,Running config,Config database,Second stage,First stage,Targetconfig,New running config,+,Two-Stage Configuration,=,Stage 1:Make configuration changesCreate new target config by entering config,Stage 2:Make changes persistent,Running config,RP“disk0:”,Running configplus changes,Configuration File System,New binary configuration created;router uses it to boot up following reload,Access and Login,IOS XR router access:Direct connection to console portTerminal server connected to the console portTelnet or SSH(v1 or v2)Login Root-system user