CCNA_Basics2

Objectives:

Objectives Upon completion of this chapter, you will be able to perform the following tasks: Identify and connect the necessary components to enable connectivity between routers or switches. Identify and connect the necessary components to enable WAN connectivity over serial or ISDN BRI connections. Set up console connections among routers, switches, and a terminal.

Objectives (cont.):

Objectives (cont.) Document the physical topology, including cable types and cable locations, of each internetworking device.

Cabling the Campus:

core_sw_a ISDN Cloud Leased Line/ Frame Relay Cabling the Campus Legend Fast Ethernet/ Ethernet ISDN Dedicated Core Server

Slide 5:

Physical Data-Link (MAC Layer) LAN Physical Layer Implementations Physical layer implementations vary. Some implementations support multiple physical media. Ethernet 100baseTX 10BaseT 802.3 10Base5 10Base2 100baseFX 802.3 Specifications for 10-Mbps Ethernet 802.3u Specifications for 100-Mbps (Fast) Ethernet 100baseT4 10BaseF DIX Standard

Positioning Ethernet in the Campus :

Positioning Ethernet in the Campus Access Layer Distribution Layer Core Layer Ethernet 10BaseT Position Fast Ethernet Position Access Layer Distribution Layer Core Layer Provides connectivity 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.

Slide 7:

Comparing Ethernet Media Requirements 10Base5 100BaseTX 10BaseT 100BaseFX Media Maximum Segment Length Topology Connector 50-ohm coax (thick) 500 meters Bus 100 meters Star Star Point-to-point EIA/TIA Cat 3, 4, 5 UTP 2 pair EIA/TIA Cat 5 UTP 2 pair 62.5/125-micron multi-mode fiber AUI ISO 8877 (RJ-45) Duplex media interface connector (MIC) ST ISO 8877 (RJ-45) 400 meters 100 meters

Differentiating Between Connections:

Differentiating Between Connections AUI connectors are DB-15. ISO 8877 (RJ-45) connectors and jacks are slightly larger than RJ-11 phone connectors and jacks. Fiber Connector Port

UTP Device:

UTP Device The RJ-45 Connector 1 8 8 Pair 4 R4 1 2 3 4 5 6 7 Wire Pair: T is Tip R is Ring Pair 3 T2 Pair 3 R2 Pair 2 T3 Pair 1 R1 Pair 1 T1 Pair 2 R3 Pair 4 T4 Pin

UTP Implementation Straight-Through:

UTP Implementation Straight-Through Wires on cable ends are in same order. Pin Label 1 RD+ 2 RD- 3 TD+ 4 NC 5 NC 6 TD- 7 NC 8 NC Cable 10BaseT/ 100BaseTX Straight-Through Pin Label 1 TD+ 2 TD- 3 RD+ 4 NC 5 NC 6 RD- 7 NC 8 NC Server/Router 8 1 w g g b w o w b o br w br 1 8 Straight-Through Cable 8 1 Hub/Switch 8 1 w g g b w o w b o br w br

UTP Implementation Crossover:

UTP Implementation Crossover Some wires on cable ends are crossed. 8 1 w o o b w g w b g br w br Cable 10BaseT/ 100BaseT Crossover Pin Label 1 RD+ 2 RD- 3 TD+ 4 NC 5 NC 6 TD- 7 NC 8 NC Pin Label 1 RD+ 2 RD- 3 TD+ 4 NC 5 NC 6 TD- 7 NC 8 NC Crossover Cable 1 8 1 8 8 1 w g g w b w o b o br w br Hub/Switch Hub/Switch

UTP Implementation of Straight-Through Versus Crossover:

UTP Implementation of Straight-Through Versus Crossover Use 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 Campus:

Cabling the Campus Determine the physical media used: 10-Mbps or 100-Mbps. Indicates what category of cable is required Locating interfaces on the chassis, determine if one or both ports have an “x.” Indicates if you need crossover or straight-through cable 100-Mbps Cat 5 Crossover 10-Mbps Cat 3, 4, 5 Crossover 100-Mbps Cat 5 Straight-Through 10-Mbps Cat 3, 4, 5 Straight-Through 10-Mbps Cat 3, 4, 5 Straight-Through

Cabling the WAN:

Cabling the WAN Core Server core_sw_a ISDN Cloud Legend Fast Ethernet/ Ethernet ISDN Dedicated core_sw_b core_sw_b ISL Leased Line/ Frame Relay

Slide 15:

WAN Physical Layer Implementations Physical layer implementations vary. Cable specifications define speed of link. PPP Frame Relay EIA/TIA-232 EIA/TIA-449 X.21 V.24 V.35 HSSI ISDN BRI (with PPP) RJ-45 NOTE: Pinouts are different from RJ-45 used in campus. HDLC

Slide 16:

Differentiating Between WAN Serial Connectors Router Connections Network Connections at the CSU/DSU EIA/TIA-232 EIA/TIA-449 EIA-530 V.35 X.21 CSU/ DSU End-User Device DTE DCE Service Provider

Serial Implementation of DTE Versus DCE:

Data Terminal Equipment: End of the user’s device on the WAN link. Data Communications Equipment: End of the WAN provider’s side of the communication facility. Responsible for clocking. DCE DTE Modem CSU/DSU S S S S S S DTE DTE DCE DCE Serial Implementation of DTE Versus DCE DTE/DCE—The point where responsibility passes

Slide 18:

Fixed Interfaces 2500 Router—Rear View Serial WAN ports can be fixed.

Modular Interfaces:

Console Cisco 1603 Router—Rear View Ethernet AUI Ethernet 10BaseT ISDN BRI S/T Serial WAN ports can be modular. Cisco 3640 Router— Rear View Modular Interfaces Module WAN Interface Card

Cabling Routers for ISDN Connections:

Cabling Routers for ISDN Connections Determine if you need a BRI S/T or U Interface. Routers have one or both types of port. Note port label.

Cabling Routers for ISDN Connections (cont.):

Cabling Routers for ISDN Connections (cont.) !!!WARNING!!! Do not connect a cable to an ISDN port unless it is from an ISDN switch or ISDN wall jack. If you connect a cable from any other device to the BRI port, you will ruin the non-ISDN device. Cisco Router ISDN BRI Port

Setting Up a Console Connection:

PCs require an RJ-45-to-DB-9 or RJ-45-to-DB-25 adapter. COM port settings are 9600 bps, 8 data bits, no parity, 1 stop bit, no flow control. This provides out-of-band console access. AUX switch port may be used for a modem-connected console. Setting Up a Console Connection Device with Console

Summary:

Summary After completing this chapter, you should be able to perform the following tasks: Identify and connect the necessary components to enable connectivity between switches and routers. Identify and connect the necessary components to enable WAN connectivity over serial or ISDN BRI connections. Set up console connections on routers and switches.

Review Questions:

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 Questions A B C 8 1 w 0 o w b w g b g br w br 8 1 w g g w b w o b o br w br

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