Lab 9.2.6 Troubleshooting Using ping and telnet – Instructor Version
Contents
1. Step 6 Perform the lab again with Team members 1 and 2 switching roles Upon completion of the previous steps log off by typing exit and turn the router off 711 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 9 2 6 Copyright 2003 Cisco Systems Inc Erasing and reloading the router Enter into the privileged EXEC mode by typing enable If prompted for a password enter class If class does not work ask the instructor for assistance Router gt enable At the privileged EXEC mode enter the command erase startup config Router erase startup config The responding line prompt will be Erasing the nvram filesystem will remove all files Continue confirm Press Enter to confirm The response should be Erase of nvram complete Now at the privileged EXEC mode enter the command reload Routertconfig treteadRouter reload The responding line prompt will be System configuration has been modified Save yes no Type n and then press Enter The responding line prompt will be Proceed with reload confirm Press Enter to confirm In the first line of the response will be Reload requested by console After the router has reloaded the line prompt will be Would you like to enter the initial configuration dialog yes no Type n and then press Enter The responding line prompt will be Press RETURN to get started Press Enter The router is ready for the assigned lab to be p2. Current configuration I version 12 0 service timestamps debug uptime service timestamps log uptime no service password encryption hostname BHM enable secret 5 S1SaSAZStA5JwOOhP8chLOs3LJYMi ip subnet zero interface FastEthernet0 0 ip address 192 168 16 1 255 255 255 0 no ip directed broadcast interface Serial0 0 ip address 192 168 15 2 255 255 255 0 no ip directed broadcast no ip route cache interface Serial0 1 ip address 192 168 13 2 255 255 255 0 no ip directed broadcast no ip route cache router rap network 192 168 13 0 network 192 168 15 0 network 192 168 16 0 no ip classless no ip http server line con 0 password cisco login transport input none line aux 0 line vty 0 4 password cisco login end 714 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 9 2 6 Copyright O 2003 Cisco Systems Inc GAD show running config Building configuration Current configuration version 12 0 service timestamps debug uptime service timestamps log uptime no service password encryption hostname GAD l enable secret 5 1 yOUl1 wXUASjW8rYzUxoAqRDmge8 ip subnet zero interface FastEthernet0 0 ip address 192 168 14 1 255 255 255 0 no ip directed broadcast interface Serial0 0 ip address 192 168 15 1 255 255 255 0 no ip directed b
3. a Test the configuration by pinging all interfaces from each host If the pinging is not successful go on to Step 3 b Advise the instructor that the configuration is operational The instructor will introduce fault s in the configuration to diagnose and repair Step 3 Check the connections a Review the physical connections on the standard lab setup b Check all physical devices cables and connections Step 4 Troubleshoot a Troubleshoot induced network problems b Use the commands ping and telnet to discover problems Step 5 List the findings a Write down the problems as they are encountered b Write down what was done to correct the problems c Have the instructor verify that all problems were corrected Answers vary Suggested problems are below Problem Problem Discovered Solution Instructor Verification 1 Could not ping any hosts IP address is wrong 2 Can ping hosts X Y but Subnet is wrong not Z 3 Line protocol down on No clockrate set serial interface 4 Line protocol down on DCE and DTE are serial interface reversed 5 When using Telnet the No password set on VTY message Password required none set appears Step 6 Perform the lab again with Team members 1 and 2 switching roles Upon completion of the previous steps log off by typing exit and turn the router off 289 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 9 2 6 Copyright 2003 Cisco Systems
4. 00 806 Ethernet 0 EO Ethernet 1 E1 1600 Ethernet 0 EO Ethernet 1 E1 Serial 0 SO Serial 1 S1 1700 FastEthernet 0 FAO FastEthernet 1 FA1 Serial 0 SO Serial 1 81 2500 Ethernet 0 EO Ethernet 1 E1 Serial 0 SO Serial 1 S1 2600 FastEthernet 0 0 FastEthernet 0 1 FA0 1 Serial 0 0 S0 0 Serial 0 1 FA0 0 80 1 In order to find out exactly how the router is configured look at the interfaces This will identify the type of router as well as how many interfaces the router has There is no way to effectively list all of the combinations of configurations for each router class What is provided are the identifiers for the possible combinations of interfaces in the device This interface chart does not include any other type of interface even though a specific router may contain one An example of this might be an ISDN BRI interface The string in parenthesis is the legal abbreviation that can be used in IOS command to represent the interface 291 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 9 2 6 Copyright 2003 Cisco Systems Inc BHM show running config Building configuration Current configuration I version 12 0 service timestamps debug uptime service timestamps log uptime no service password encryption hostname BHM enable secret 5 1SaSAZStA5JwOOhP8chLOs3LJYMi ip subnet zero interface Ethernet0 ip address 192 168 16 1 25
5. 5 255 255 0 no ip directed broadcast interface Serialo ip address 192 168 15 2 255 255 255 0 no ip directed broadcast no ip route cache interface Seriall ip address 192 168 13 2 255 255 255 0 no ip directed broadcast no ip route cache router rip network 192 168 13 0 network 192 168 15 0 network 192 168 16 0 no ip classless no ip http server line con 0 password cisco login transport input none line aux O0 line vty 0 4 password cisco login end 292 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 9 2 6 Copyright 2003 Cisco Systems Inc GAD show running config Building configuration Current configuration version 12 0 service timestamps debug uptime service timestamps log uptime no service password encryption hostname GAD l enable secret 5 1 yOUl1 wXUASjW8rYzUxoAqRDmge8 ip subnet zero interface Ethernet0 ip address 192 168 14 1 255 255 255 0 no ip directed broadcast interface SerialO ip address 192 168 15 1 255 255 255 0 no ip directed broadcast no ip route cache clockrate 56000 interface Seriali ip address 192 168 13 1 255 255 255 0 no ip directed broadcast no ip route cache clockrate 56000 l router rip network 192 168 13 0 network 192 168 14 0 network 192 168 15 0 no ip classless ip
6. Cisco Systems niti i is ioci lr Lab 9 2 6 Troubleshooting Using ping and telnet Instructor Version 2500 Router 1 S0 Router 2 Router Router Enable Enable VTY Routing RIP network designation Name secret and Console protocol statements password passwords Router IP Host Fast Interface Serial 0 Interface Serial 1 Subnet designation Table EthernetO type address type address mask all Entry address Serial 0 Serial 1 addresses Rouert lehm 192 108 14 1 DCE 192168 151 DCE 192 168 152 2552552850 Note The IP Host Table Entry column contents indicate the name s of the other router s in the IP host table Straight through cable C Console Rollover soooosooooosooooooooo Serial cable a Ss Crossover cabe NOTE This graphic is incorrect Router 1 serial 1 should be 192 168 13 1 and Router 2 serial 0 should be 192 168 15 2 Objective e Use knowledge of OSI Layers 1 2 and 3 to diagnose network configuration errors e Use ping and telnet utilities in testing Background Preparation Cable a network similar to the one in the diagram Any router that meets the interface requirements displayed on the above diagram such as 800 1600 1700 2500 2600 routers or a combination may be used Please refer to the chart at the end of the lab to correctly identify the interface identifiers to be used based on the equipment in the lab The configuration output used in this lab is pro
7. Inc Erasing and reloading the router Enter into the privileged EXEC mode by typing enable If prompted for a password enter class If class does not work ask the instructor for assistance Router gt enable At the privileged EXEC mode enter the command erase startup config Router erase startup config The responding line prompt will be Erasing the nvram filesystem will remove all files Continue confirm Press Enter to confirm The response should be Erase of nvram complete Now at the privileged EXEC mode enter the command reload Routertconfig treteadRouter reload The responding line prompt will be System configuration has been modified Save yes no Type n and then press Enter The responding line prompt will be Proceed with reload confirm Press Enter to confirm In the first line of the response will be Reload requested by console After the router has reloaded the line prompt will be Would you like to enter the initial configuration dialog yes no Type n and then press Enter The responding line prompt will be Press RETURN to get started Press Enter The router is ready for the assigned lab to be performed 290 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 9 2 6 Copyright 2003 Cisco Systems Inc Router Interface Summary Router Ethernet Ethernet Serial Serial Interface Model Interface 1 Interface 2 Interface 1 Interface 2 5 8
8. duced from 1721 series routers Any other router used may produce a slightly different output The following steps are intended to be executed on each router unless specifically instructed otherwise Start a HyperTerminal session as performed in the Establishing a HyperTerminal session lab Note Work in teams of 2 Team member 1 should cable and configure the routers and workstations according to the chart This will introduce some errors Team member 2 should test the configuration using physical inspection ping and Telnet 288 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 9 2 6 Copyright 2003 Cisco Systems Inc Note Go to the erase and reload instructions at the end of this lab Perform those steps on all routers in this lab assignment before continuing Step 1 Configure the routers a On the routers enter the global configuration mode and configure the hostname as shown in the chart Then configure the console virtual terminal and enable passwords If there are problems doing this refer to the Configuring Router Passwords lab Next configure the interfaces and routing according to the chart If there are problems doing this refer to the Configuring Host Tables lab and the Configuring RIP lab Make sure to copy the running config to the startup config on each router so the configuration will not be lost if the router is power recycled Step 2 Configure the hosts with the proper IP address subnet mask and default gateway
9. e above diagram such as 800 1600 1700 2500 2600 routers or a combination may be used Please refer to the chart at the end of the lab to correctly identify the interface identifiers to be used based on the equipment in the lab The configuration output used in this lab is produced from 1721 series routers Any other router used may produce a slightly different output The following steps are intended to be executed on each router unless specifically instructed otherwise Start a HyperTerminal session as performed in the Establishing a HyperTerminal session lab Note Work in teams of 2 Team member 1 should cable and configure the routers and workstations according to the chart This will introduce some errors Team member 2 should test the configuration using physical inspection ping and Telnet 710 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 9 2 6 Copyright 2003 Cisco Systems Inc Note Go to the erase and reload instructions at the end of this lab Perform those steps on all routers in this lab assignment before continuing Step 1 Configure the routers a On the routers enter the global configuration mode and configure the hostname as shown in the chart Then configure the console virtual terminal and enable passwords If there are problems doing this refer to the Configuring Router Passwords lab Next configure the interfaces and routing according to the chart If there are problems doing this refer to the Configuri
10. erformed 712 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 9 2 6 Copyright 2003 Cisco Systems Inc Router Interface Summary Router Ethernet Ethernet Serial Serial Interface Model Interface 1 Interface 2 Interface 1 Interface 2 5 800 806 Ethernet 0 EO Ethernet 1 E1 1600 Ethernet 0 EO Ethernet 1 E1 Serial 0 SO Serial 1 S1 1700 FastEthernet 0 FAO FastEthernet 1 FA1 Serial 0 SO Serial 1 81 2500 Ethernet 0 EO Ethernet 1 E1 Serial 0 SO Serial 1 S1 2600 FastEthernet 0 0 FastEthernet 0 1 FA0 1 Serial 0 0 S0 0 Serial 0 1 FA0 0 80 1 In order to find out exactly how the router is configured look at the interfaces This will identify the type of router as well as how many interfaces the router has There is no way to effectively list all of the combinations of configurations for each router class What is provided are the identifiers for the possible combinations of interfaces in the device This interface chart does not include any other type of interface even though a specific router may contain one An example of this might be an ISDN BRI interface The string in parenthesis is the legal abbreviation that can be used in IOS command to represent the interface 713 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 9 2 6 Copyright 2003 Cisco Systems Inc Router Outputs BHM show running config Building configutation
11. http server line con 0 exec timeout 0 0 password cisco login transport input none line aux 0 password cisco login line vty 0 4 password cisco login end 293 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 9 2 6 Copyright O 2003 Cisco Systems Inc Cisco Systems E ceed Lab 9 2 6 Troubleshooting Using ping and telnet Instructor Version 2600 Router 1 S0 Router 2 Router Router Enable Enable VTY Routing RIP network designation Name secret and Console protocol statements password passwords Router IP Host Fast Interface Serial 0 Interface Serial 1 Subnet designation Table EthernetO type address type address mask all Entry address Serial 0 Serial 1 addresses Rouert lehm 192 108 14 1 DCE 192168 151 DCE 192 168 152 2552552550 Note The IP Host Table Entry column contents indicate the name s of the other router s in the IP host table Straight through cable Console Rollover sosoososooosooooooooo Serial cable I SS Crossovercable NOTE This graphic is incorrect Router 1 serial 1 should be 192 168 13 1 and Router 2 serial 0 should be 192 168 15 2 Objective e Use knowledge of OSI Layers 1 2 and 3 to diagnose network configuration errors e Use ping and telnet utilities in testing Background Preparation Cable a network similar to the one in the diagram Any router that meets the interface requirements displayed on th
12. ng Host Tables lab and the Configuring RIP lab Make sure to copy the running config to the startup config on each router so the configuration will not be lost if the router is power recycled Step 2 Configure the hosts with the proper IP address subnet mask and default gateway a Test the configuration by pinging all interfaces from each host If the pinging is not successful go on to Step 3 b Advise the instructor that the configuration is operational The instructor will introduce fault s in the configuration to diagnose and repair Step 3 Check the connections a Review the physical connections on the standard lab setup b Check all physical devices cables and connections Step 4 Troubleshoot a Troubleshoot induced network problems b Use the commands ping and telnet to discover problems Step 5 List the findings a Write down the problems as they are encountered b Write down what was done to correct the problems c Have the instructor verify that all problems were corrected Answers vary Suggested problems are below Problem Problem Discovered Solution Instructor Verification 1 Could not ping any IP address is wrong hosts 2 Can ping hosts X Y but Subnet is wrong not Z 3 Line protocol down on No clockrate set serial interface 4 Line protocol down on DCE and DTE are serial interface reversed 5 When using Telnet the No password set on VTY message Password required none set appears
13. roadcast no ip route cache clockrate 56000 interface Serial0 1 ip address 192 168 13 1 255 255 255 0 no ip directed broadcast no ip route cache clockrate 56000 l router rip network 192 168 13 0 network 192 168 14 0 network 192 168 15 0 no ip classless ip http server line con 0 exec timeout 0 0 password cisco login transport input none line aux 0 password cisco login line vty 0 4 password cisco login end 715 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 9 2 6 Copyright O 2003 Cisco Systems Inc
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