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1、 1999, Cisco Systems, Inc. 3-1Chapter 3 Assembling and Cabling Cisco Devices 1999, Cisco Systems, Inc. ICND3-2ObjectivesUpon completion of this chapter, you will be able to perform the following tasks:Identify and connect necessary components to enable connectivity between routers or switchesIdentif
2、y and connect necessary components to enable WAN connectivity over serial or ISDN BRI connections 1999, Cisco Systems, Inc. ICND3-3Objectives (cont.)Set up console connections between routers, switches and a terminal Document the physical topology, including cable types and cable locations on each i
3、nternetworking device 1999, Cisco Systems, Inc. ICND3-4core_sw_a ISDN Cloud Leased Line/ Frame Relay Cabling the CampusLegendFastEthernet/ Ethernet ISDN DedicatedCore_ Server 1999, Cisco Systems, Inc. ICND3-5PhysicalData Link (MAC layer)LAN Physical Layer Implementations Physical layer implementatio
4、ns vary Some implementations support multiple physical mediaEthernet100baseTX10BaseT802.310Base510Base2100baseFX802.3 Specifications for 10mb Ethernet802.3u Specifications for 100mb (Fast) Ethernet100baseT410BaseFDIX Standard 1999, Cisco Systems, Inc. ICND3-6Positioning Ethernet in the Campus Access
5、 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.Pr
6、ovides 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. 1999, Cisco Systems, Inc. ICND3-7Comparing Etherne
7、t Media Requirements10Base5100BaseTX10BaseT100BaseFXMediaMaximum Segment LengthTopologyConnector50-ohm coax (thick)500 metersBus100 metersStarStarPoint-to-PointEIA/TIA Cat 3, 4, 5 UTP 2 pairEIA/TIA Cat 5 UTP 2 pair62.5/125 micron multi- mode fiberAUIISO 8877 (RJ-45)Duplex media- interface connector(
8、MIC) STISO 8877 (RJ-45)400 meters100 meters 1999, Cisco Systems, Inc. ICND3-8Differentiating between ConnectionsAUI connectors are DB15ISO 8877 (RJ-45) connectors and jacks are slightly larger than RJ-11 phone connectors and jacksFiber Connector Port 1999, Cisco Systems, Inc. ICND3-9UTP DeviceThe RJ
9、-45 Connector188Pair 4 R41 2 3 45 6 7Wire Pair T is Tip R is RingPair 2 T2 Pair 2 R2 Pair 3 T3 Pair 1 R1 Pair 1 T1 Pair 3 R3 Pair 4 T4Pin 1999, Cisco Systems, Inc. ICND3-10UTP Implementation Straight-throughWires on cable ends are in same orderPin Label 1RD+ 2RD- 3TD+ 4NC 5NC 6TD- 7NC 8NCCable 10Bas
10、eT/ 100BaseT Straight-throughPin Label 1TD+ 2TD- 3RD+ 4NC 5NC 6RD- 7NC 8NCServer/Router8 1woobwbwggbrwbr18Straight-through Cable81Hub/Switch8 1woobwbwggbrwbr1236 1999, Cisco Systems, Inc. ICND3-11UTP Implementation CrossoverSome wires on cable ends are crossed8 1woowbwgbgbr wbrCable 10BaseT/ 100Base
11、T CrossoverPin Label 1RD+ 2RD- 3TD+ 4NC 5NC 6TD- 7NC 8NCPin Label 1RD+ 2RD- 3TD+ 4NC 5NC 6TD- 7NC 8NCCrossover Cable181 881wggwbwobobr wbrHub/SwitchHub/Switch 1999, Cisco Systems, Inc. ICND3-12UTP Implementation of Straight- through versus CrossoverUse a crossover cable when BOTH ports are designate
12、d 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 1999, Cisco Systems, Inc. ICND3-13Cabling the Campus Determine the physical media used- 10mb or 100mbIndicates what type of CAT cable is required L
13、ocating interfaces on the chassis- determine if one or both ports have an XIndicates if need crossover or straight-through cable100 Mbps Cat 5 Crossover10 Mbps Cat 3, 4, 5 Crossover100 Mbps Cat 5Straight-through10 Mbps Cat 3, 4, 5 Straight-through10 Mbps Cat 3, 4, 5 Straight-through 1999, Cisco Syst
14、ems, Inc. ICND3-14Cabling the WANCore_ Server core_sw_a ISDN Cloud LegendFastEthernet/ Ethernet ISDN Dedicatedcore_sw_b core_sw_b ISL Leased Line/ Frame Relay 1999, Cisco Systems, Inc. ICND3-15WAN Physical Layer Implementations Physical layer implementations vary Cable specifications define speed of
15、 linkPPPFrame RelayEIA/TIA-232 EIA/TIA-449 X.121 V.24 V.35 HSSIISDN BRI (with PPP)RJ-45 NOTE: Pinouts are different than RJ-45 used in campusHDLC 1999, Cisco Systems, Inc. ICND3-16Differentiating Between WAN Serial ConnectorsRouter connectionsNetwork connections at the CSU/DSUEIA/TIA-232EIA/TIA-449EIA-530V.35X.21CSU/ DSUEnd user deviceDTEDCEService provider 1999, Cisco Systems, Inc. ICND3-17Data Terminal Equipment End of the users device on the WAN linkData Communications
