实用网络技术03.ppt

3-1Chapter 3Assembling and Cabling Cisco DevicesObjectivesObjectivesUpon completion of this chapter,you will be able to perform the following tasks:Identify and connect necessary components to enable connectivity between routers or switchesIdentify and connect necessary components to enable WAN connectivity over serial or ISDN BRI connectionscore_sw_a ISDN Cloud Leased Line/Frame Relay Cabling the CampusCabling the CampusLegendFastEthernet/EthernetISDNDedicatedCore_Server PhysicalData Link(MAC layer)LAN Physical Layer LAN Physical Layer ImplementationsImplementationsPhysical layer implementations varySome implementations support multiple physical mediaEthernet100baseTX10BaseT802.310Base510Base2100baseFX802.3 Specifications for 10MB Ethernet802.3u Specifications for 100MB(Fast)Ethernet100baseT410BaseFDIX StandardPositioning Ethernet in the Positioning Ethernet in the Campus Campus Access LayerDistribution LayerCore LayerEthernet 10BaseT PositionFast Ethernet PositionAccess LayerDistribution LayerCore LayerProvides connectivty between the end user device and the access switch.Not typically used at this layer.Gives high-performance PC and workstations 100-Mbps access to the server.Provides connectivity between access and distribution layers.Provides connectivity from the distribution to core layer.Provides connectivity from the server block to the core layer.Provides inter-switch connectivity.Not typically used at this layer.Comparing Ethernet Media Comparing Ethernet Media RequirementsRequirements10Base5100BaseTX10BaseT100BaseFXMediaMaximum Segment LengthTopologyConnector50-ohm coax(thick)500 metersBus100 metersStarStarPoint-to-PointEIA/TIA Cat3,4,5 UTP2 pairEIA/TIA Cat5 UTP2 pair62.5/125 micron multi-mode fiberAUIISO 8877(RJ-45)Duplex media-interface connector(MIC)STISO 8877(RJ-45)400 meters100 metersDifferentiating between Differentiating between ConnectionsConnectionsAUI connectors are DB15ISO 8877(RJ-45)connectors and jacks are slightly larger than RJ-11 phone connectors and jacksFiber Connector PortUTP DeviceUTP DeviceThe RJ-45 Connector188Pair 4 R41234567Wire PairT is TipR is RingPair 3 T2Pair 3 R2Pair 2 T3Pair 1 R1Pair 1 T1Pair 2 R3Pair 4 T4Pin UTP Implementation UTP Implementation Straight-throughStraight-throughWires on cable ends are in same orderPin Label1RD+2RD-3TD+4NC5NC6TD-7NC8NCCable 10BaseT/100BaseTx Straight-throughPin Label1TD+2TD-3RD+4NC5NC6RD-7NC8NCServer/Router8 1wggbwowbobrwbr18Straight-through Cable81Hub/Switch8 1wggbwowbobrwbrUTP Implementation UTP Implementation CrossoverCrossoverSome wires on cable ends are crossed8 1woobwgwbgbr wbrCable 10BaseT/100BaseT CrossoverPin Label1RD+2RD-3TD+4NC5NC6TD-7NC8NCPin Label1RD+2RD-3TD+4NC5NC6TD-7NC8NCCrossover Cable181881wggwbwobobr wbrHub/SwitchHub/SwitchUTP Implementation of Straight-UTP Implementation of Straight-through versus Crossoverthrough versus CrossoverUse a crossover cable when BOTH ports are designated with an x or neither port is designated with an x.Use straight-through when only one port is designated with an X.1x 2x 3x 4x 1x 2x 3x 4x 1x 2x 3x 4x Cabling the CampusCabling the CampusDetermine the physical media used-10MB or 100MBIndicates what type of CAT cable is requiredLocating interfaces on the chassis-determine if one or both ports have an XIndicates if need crossover or straight-through cable100 MbpsCat 5Crossover10 MbpsCat 3,4,5Crossover100 MbpsCat 5 Straight-through10 MbpsCat 3,4,5Straight-through10 MbpsCat 3,4,5Straight-throughCabling the WANCabling the WANCore_Server core_sw_a ISDN Cloud LegendFastEthernet/EthernetISDNDedicatedcore_sw_b core_sw_b ISL Leased Line/Frame Relay WAN Physical Layer WAN Physical Layer ImplementationsImplementationsPhysical layer implementations varyCable specifications define speed of linkPPPFrame RelayEIA/TIA-232EIA/TIA-449X.21 V.24 V.35HSSIISDN BRI(with PPP)RJ-45NOTE:Pinouts are different than RJ-45 used in campusHDLCDifferentiating Between WAN Differentiating Between WAN Serial ConnectorsSerial ConnectorsRouter connectionsNetwork connections at the CSU/DSUEIA/TIA-232EIA/TIA-449EIA-530V.35X.21CSU/DSUEnd user deviceDTEDCEService providerData Terminal EquipmentEnd of the users deviceon the WAN linkData Communications EquipmentEnd of the WAN providers side of the communication facilityDCE is responsible for clockingDCEDTEModemCSU/DSUSSSSSSSSSSSSDTEDTEDCEDCESerial Implementation ofSerial Implementation ofDTE versus DCEDTE versus DCEDTE/DCEThe point where responsibility passesFixed InterfacesFixed Interfaces2500 Routerrear viewSerial WAN ports can be fixedConsole1603 Routerrear viewEthernet AUIEthernet 10BaseTISDN BRI S/TSerial WAN ports can be modular3640 Routerrear viewModular InterfacesModular InterfacesModuleWAN Interface CardCabling Routers for ISDN Cabling Routers for ISDN ConnectionsConnectionsDetermine if you need a BRI S/T or U InterfaceRouters have one or both types of portsNote port LabelCabling Routers for ISDN Cabling Routers for ISDN Connections(cont.)Connections(cont.)!WARNING!Do not connect a cable into an ISDN port unless it is from an ISDN switch or ISDN wall jack.If you connect a cable from any other device into the BRI port,you will ruin the non-ISDN device.Cisco RouterISDN BRI port PCs require an RJ-45 to DB-9 or RJ-45 to DB-25 adapterCOM port settings are 9600 bps,8 data bits,no parity,1 stop bit,no flow controlThis provides out-of-band console accessAUX switch port may be used for modem-connected consoleSetting up a Console Setting up a Console ConnectionConnectionDevice with consoleVisual ObjectiveVisual Objectivecore_ serverwg_sw_awg_sw_lwg_pc_awg_pc_l.LL/FRwg_ro_awg_ro_le0/1(1x)e0/2(2x)fa0/26(Ax)e0/2(2x)e0/1(1x)e0e0s0s0bri0bri0fa0/26(Ax)fa0/1(1x)fa0/12(12x)fa0/23(23x)fa0/24(24x)fa0/0s1/0-s2/3s3/0consoleconsoleA/BA/Bconsoleconsolecore_sw_acore_ro.ISDNSummarySummaryAfter completing this chapter,you should be able to perform the following tasks:Identify and connect necessary components to enable connectivity between switches and routers Identify and connect necessary components to enable WAN connectivity between over serial or ISDN BRI connections Set up console connections on routers and switches 1.Discuss three standards on which Ethernet LAN implementations are based.2.If you want to upgrade your switch to switch connectivity to 100BaseT,what category of cable do you need?3.Does the following pinout scheme reflect a straight-through,rollover,or crossover cable?4.What media can be used for each connector type?Review QuestionsReview QuestionsABC8 1w0owbwgb gbrwbr81wggwbwob obrwbr