Lab 5.2.3c Troubleshooting Interconnected Devices – Instructor
Contents
1. also be used to check IP settings Verify the IP address subnet mask and default gateway for each workstation Step 3 Record problems found in the table below This should be done by Team member B Type of problem Location of problem Corrective Action Taken Cabling related Router A Ethernet 0 Plug in cable securely Cabling related Router A Ethernet 0 to Switch A Replace with straight cable or re terminate one end Cabling related Switch B Re terminate IP related Router A Serial 0 Reconfigure with proper IP Address IP related Router B Serial 1 Reconfigure with proper subnet mask IP related Ethernet amp Serial Links Readdress system Step 4 Team members A and B switch roles and repeat the lab Step 5 Restore the PCs to their original IP settings disconnect the equipment and store the cables 3 3 CCNA 1 Networking Basics v 3 1 Lab 5 2 3c Instructor Version Copyright 2003 Cisco Systems Inc2. Cisco SYSTEMS erie Lab 5 2 3c Troubleshooting Interconnected Devices Instructor Version Switch A Router A Router B Straight through cable Serial cable a Rollover console ETTETEETETTTETEETTET Crossover cable Objective e Create a simple routed wide area network WAN with two PCs two switches or hubs and two routers e Configure workstation IP address information e Identify and correct networking problems related to cabling issues e Identify and correct networking problems workstation IP addressing issues Background Preparation This lab focuses on configuring a basic router to router WAN and then troubleshooting Layer 1 cabling problems and workstation Layer 3 IP addressing problems Note The two routers need to be preconfigured by the instructor or lab assistant to have the correct IP addresses on their LAN and WAN interfaces Router A will provide the clocking signal as DCE Use the prior lab Basic Routed WAN to set up this lab prior to starting the troubleshooting As the configuration shown is being set up problems with cabling and workstation IP addressing should be introduced into the setup of the network By working in teams of two one person can set up the 1 1 CCNA 1 Networking Basics v 3 1 Lab 5 2 3c Instructor Version Copyright 2003 Cisco Systems Inc configuration and introduce some errors and the other person can troubleshoot the setup to determin
3. e the problems The equipment needed in this lab is the following Two Ethernet 10BASE T or Fast Ethernet switches or two hubs Two routers with an RJ 45 Ethernet or Fast Ethernet interface or an AUI interface and at least one serial interface 10BASE T AUI transceiver DB 15 to RJ 45 for a router with an AUI Ethernet interface which is a 2500 Series Several straight through crossover and improperly wired or bad cables for connecting the workstations and routers to the hub or switch One female DCE and one male DTE V 35 cable for interconnecting the routers Step 1 Set up the lab configuration for Team member A by doing the following a Setup the lab according to prior lab Building a Basic Routed WAN b As the components are being connected use a variety of Category 5 cables including at least one crossover cable and a cable that is improperly wired c When configuring the workstations introduce at least one misconfiguration of IP address information per PC d Record the problems introduced in the table below Examples are listed Space is provided for up to three cabling problems and three IP problems If it is a cabling problem indicate the location of the problem such as PC A to Switch A If it is an IP related problem indicate which PC the problem is with In the third column describe the problem introduced such as crossover cable used wrong IP address or wrong default gateway Type o
4. f problem Location of problem Problem introduced Cabling related Router A Ethernet 0 Cable loose Cabling related Router A Ethernet 0 to Switch A Crossover cable used Cabling related Switch B Bad termination IP related Router A Serial 0 Bad IP address IP related Router B Serial 1 Incorrect subnet mask IP related Ethernet amp Serial Links All addresses on same subnet Step 2 Troubleshoot the lab configuration for Team member B a C Check workstation to workstation connectivity Ping from the command prompt on workstation A to the IP address of workstation B If problems have been introduced the ping attempt should fail Check physical layer integrity Start with Layer 1 issues and check the cabling between the PCs and the switch Check for the proper type of cable as well as good connections Check the cabling between the routers and the switches for connections Replace cables and insure good connections as necessary Check network layer integrity 2 2 CCNA 1 Networking Basics v 3 1 Lab 5 2 3c Instructor Version Copyright 2003 Cisco Systems Inc Check for Layer 3 configuration problems with the workstations Note that the router should be preconfigured and should not have the problems that are introduced Use the command prompt and the command winipcfg Windows 95 98 ME or ipconfig Windows NT 2000 to check the IP configuration of each workstation Control panel network application may
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