Lab 9.3.5 Troubleshooting Routing Issues with show ip route and
Contents
1. 0 transport input none line aux 0 line vty 0 4 password cisco login end 732 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 9 3 5 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 enable secret 5 1 03uG CI4acFapdY8A8CylvUpKgq ip subnet zero interface FastEthernet0 0 ip address 192 168 1 1 255 255 255 0 no ip directed broadcast interface Serial0 0 ip address 192 168 2 1 255 255 255 0 no ip directed broadcast no ip mroute cache no fair queue clock rate 64000 l interface Serial0 1 no ip address no ip directed broadcast shutdown router rip network 192 168 1 0 network 192 168 2 0 ip classless line con 0 transport input none line aux 0 line vty 0 4 password cisco login end 733 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 9 3 5 Copyright 2003 Cisco Systems Inc2. It is decided this is a typo and it is necessary to correct it Enter the router RIP configuration mode and make the appropriate changes From the BHM router type the following BHM configure terminal BHM config router rip BHM config router no network 192 168 1 0 BHM config router network 192 168 3 0 BHM config router Z 726 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 9 3 5 Copyright 2003 Cisco Systems Inc Step 11 Confirm RIP is routing the correct networks a b Now confirm the new statement corrected the RIP configuration problem So again type the show ip protocols command to observe what networks are being routed From the BHM router type the following BHM show ip protocols What networks is RIP routing 192 168 2 0 192 168 3 0 Are these the correct networks Yes BHM show ip protocols Routing Protocol is rip Sending updates every 30 seconds next due in 24 seconds Invalid after 180 seconds hold down 180 flushed after 240 Outgoing update filter list for all interfaces is Incoming update filter list for all interfaces is Redistributing rip Default version control send version 1 receive any version Interface Send Recv Triggered RIP Key chain FastEthernet0 0 T 1 2 SerialO O0 e 1 5 Automatic network summarization is in effect Routing for Networks 192 168 2 0 192 168 3 0 Routing Information Sources Gateway Distance Last Update 192 108 2 1 1230
3. config router network 192 168 1 0 BHM config router exit BHM config exit Step 6 Save the BHM router configuration BHM copy running config startup config Destination filename startup config Enter Step 7 Verify that the internetwork is functioning by pinging the FastEthernet interface of the other router a From GAD is it possible to ping the BHM router FastEthernet interface No b From BHM is it possible to ping the GAD router FastEthernet interface Yes 303 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 9 3 5 Copyright 2003 Cisco Systems Inc Step 8 Examine the routing table a After an unsuccessful ping check the routing table with the show ip route command From the GAD router type the following GAD show ip route Is there a route to the BHM Ethernet LAN No GAD show ip route lt output omitted gt Gateway of last resort is not set E 192 168 1 0 24 is directly connected EthernetO 2 192 168 2 0 24 is directly connected SerialO Step 9 Examine the routing protocol status a After examining the routing tables it is discovered that there is no route to the BHM Ethernet LAN So use the show ip protocols command to view the routing protocol status From the BHM router type the following BHM show ip protocols What networks is RIP routing 192 168 1 0 192 168 2 0 Are these the correct networks No BHM show ip protocols Routing Protocol is rip Sending updates ev
4. inter area N1 OSPF NSSA external type 1 N2 OSPF NSSA external type 2 El OSPF external type 1 E2 OSPF external type 2 E EGP i IS IS L1 IS IS level 1 L2 IS IS level 2 ia IS IS inter area candidate default U per user static route o ODR P periodic downloaded static route Gateway of last resort is not set C 192 168 1 0 24 is directly connected EthernetO0 192 168 2 0 24 is directly connected Serialo 305 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 9 3 5 Copyright 2003 Cisco Systems Inc Step 13 Verify connectivity between GAD router and host in BHM a Use the ping command to verify connectivity from GAD router to a host in BHM b From the GAD router type the following GAD ping host ip For example for host with IP Address type the following GAD ping 192 168 3 2 c Was the ping successful Yes Upon completion of the previous steps log off by typing exit and turn the router off 306 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 9 3 5 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 fil
5. none line aux 0 line vty 0 4 password cisco login end 309 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 9 3 5 Copyright O 2003 Cisco Systems Inc BHM working BHM show running config Building configuration Current configuration version 12 0 Service timestamps debug uptime Service timestamps log uptime no service password encryption hostname BHM enable secret 5 1 iQzD hHdQsscpbSdVj63u69J1X1 ip subnet zero interface Ethernet0 ip address 192 168 3 1 255 255 2550 no ip directed broadcast interface Serialo ip address 192 168 2 2 255 255 255 0 no ip directed broadcast no ip mroute cache no fair queue interface Seriall no ip address no ip directed broadcast shutdown router rip network 192 168 2 0 ip classless line con 0 transport input none line aux 0 line vty 0 4 password cisco login end 310 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 9 3 5 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 enable secret 5 1 03uG CI4acFapdY8A8CylvUpKqgq ip subnet zero interface Ethernet0 ip address 192 168 1 1 255 255 2550 no ip directed broadca
6. 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 308 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 9 3 5 Copyright 2003 Cisco Systems Inc BHM with error BHM show running config Building configuration Current configuration version 12 0 Service timestamps debug uptime Service timestamps log uptime no service password encryption hostname BHM enable secret 5 1 iQzD hHdQsscpbSdVj63u69J1X1 ip subnet zero interface EthernetO ip address 192 168 3 1 255 255 255 0 no ip directed broadcast interface Serialo ip address 192 168 2 2 255 255 255 0 no ip directed broadcast no ip mroute cache no fair queue interface Seriall no ip address no ip directed broadcast shutdown router rip network 192 168 2 0 ip classless line con 0 transport input
7. 0 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 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 724 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 9 3 5 Copyright O 2003 Cisco Systems Inc Step 1 Configure the hostname passwords and interfaces on the GAD router a Onthe GAD router 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 is a problem doing this refer to the Configuring Router Passwords lab Configure interfaces as shown in the table Step 2 Configure the routing protocol on the GAD router a Go to the proper command mode and enter the following GAD config router rip GAD config router network 192 168 1 0 GAD config router network 192 168 2 0 GAD config router exit GAD config exit Step 3 Save the GAD router configuration GAD
8. 00 00 18 Distance default is 120 Step 12 Verify the routing table a Now having confirmed that the configuration problem is corrected verify that the proper routes are now in the routing table So again issue the show ip route command to verify that the router now has the proper route From the GAD router type the following GAD show ip route Is there a route to the BHM LAN Yes GAD show ip route Codes C connected S static I IGRP R RIP M mobile B BGP D EIGRP EX EIGRP external O OSPF IA OSPF inter area N1 OSPF NSSA external type 1 N2 OSPF NSSA external type 2 El OSPF external type 1 E2 OSPF external type 2 E EGP i IS IS L1 IS IS level 1 L2 IS IS level 2 ia IS IS inter area candidate default U per user static route o ODR P periodic downloaded static route Gateway of last resort is not set c 192 168 1 0 24 is directly connected FastEthernet0 0 C 192 168 2 0 24 is directly connected Serial0 0 727 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 9 3 5 Copyright O 2003 Cisco Systems Inc Step 13 Verify connectivity between GAD router and host in BHM a Use the ping command to verify connectivity from GAD router to a host in BHM b From the GAD router type the following GAD ping host ip For example for host with IP Address type the following GAD ping 192 168 3 2 c Was the ping succ
9. 003 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 730 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 9 3 5 Copyright 2003 Cisco Systems Inc BHM with error BHM show running config Building configuration Current configuration version 12 0 Service timestamps debug uptime Servi
10. 192 168 1 0 24 is directly connected FastEthernet0 0 e 192 168 2 0 24 is directly connected Serial0 0 Step 9 Examine the routing protocol status a After examining the routing tables it is discovered that there is no route to the BHM Ethernet LAN So use the show ip protocols command to view the routing protocol status From the BHM router type the following BHM show ip protocols What networks is RIP routing 192 168 1 0 192 168 2 0 Are these the correct networks No BHM show ip protocols Routing Protocol is rip Sending updates every 30 seconds next due in 8 seconds Invalid after 180 seconds hold down 180 flushed after 240 Outgoing update filter list for all interfaces is Incoming update filter list for all interfaces is Redistributing rip Default version control send version 1 receive any version Interface Send Recv Triggered RIP Key chain Serial0 0 ii 12 Automatic network summarization is in effect Routing for Networks 192 168 1 0 192 168 2 0 Routing Information Sources Gateway Distance Last Update 192 169 2 1 120 0070011 Distance default is 120 Step 10 Change the configuration to route correct networks a After examining the show ip protocols command results it is noticed that the network on the Ethernet LAN is not being routed After examining it further it is found that there is a network that does not belong has been configured to be advertised
11. Cisco SYSTEMS Lab 9 3 5 Troubleshooting Routing Issues with show ip route and show ip protocols Instructor Version 2500 Router 1 Router 2 Router Router Fast Interface Serial 0 Subnet mask Enable Enable VTY Designation Name Ethernet O0 type Address for both secret and console Address interfaces password password 192 168 1 1 DCE 192 168 2 1 2552552660 cass cisco GAD 192168 1 Router BHM i9216831 DTE 192 16822 2552552550 cass cisco Straight through cable Serial cable are ar Console Rollover eessssccsecseoscsseoes Crossover cable Objective e Usethe show ip route and show ip protocol commands to diagnose a routing configuration problem 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 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 Go to the erase and reload instru
12. RIP configuration problem So again type the show ip protocols command to observe what networks are being routed From the BHM router type the following BHM show ip protocols What networks is RIP routing 192 168 2 0 192 168 3 0 Are these the correct networks Yes BHM show ip protocols Routing Protocol is rip Sending updates every 30 seconds next due in 24 seconds Invalid after 180 seconds hold down 180 flushed after 240 Outgoing update filter list for all interfaces is Incoming update filter list for all interfaces is Redistributing rip Default version control send version 1 receive any version Interface Send Recv Triggered RIP Key chain EthernetO 1 a SerialO iL 12 Automatic network summarization is in effect Routing for Networks 192 168 2 0 192 168 3 0 Routing Information Sources Gateway Distance Last Update 192 108 2 1 1230 00 00 18 Distance default is 120 Step 12 Verify the routing table a Now having confirmed that the configuration problem is corrected verify that the proper routes are now in the routing table So again issue the show ip route command to verify that the router now has the proper route From the GAD router type the following GAD show ip route Is there a route to the BHM LAN Yes GAD show ip route Codes C connected S static I IGRP R RIP M mobile B BGP D EIGRP EX EIGRP external O OSPF IA OSPF
13. ce timestamps log uptime no service password encryption hostname BHM enable secret 5 1 iQzD hHdQsscpbSdVj63u69J1X1 ip subnet zero interface FastEthernet0 0 ip address 192 168 3 1 255 255 255 0 no ip directed broadcast interface SerialO0 O ip address 192 168 2 2 255 255 255 0 no ip directed broadcast no ip mroute cache no fair queue interface Serial0 1 no ip address no ip directed broadcast shutdown router rip network 192 168 2 0 ip classless line con 0 transport input none line aux 0 line vty 0 4 password cisco login end 731 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 9 3 5 Copyright O 2003 Cisco Systems Inc BHM working BHM show ru Building configuration Current configuration version 12 0 Service timestamps debug uptime Service timestamps log uptime no service password encryption hostname BHM enable secret 5 1 iQzD hHdQsscpbSdVj63u69J1X1 ip subnet zero l interface FastEthernet0 0 ip address 192 168 3 1 255 255 255 0 no ip directed broadcast l interface Serial0 0 ip address 192 168 2 2 255 255 2550 no ip directed broadcast no ip mroute cache no fair queue interface Serial0 1 no ip address no ip directed broadcast shutdown router rip network 192 168 2 0 ip classless line con
14. copy running config startup config Destination filename startup config Enter Step 4 Configure the hostname and passwords on the BHM router a Onthe BHM router enter the global configuration mode and configure the hostname as shown in the chart Then configure the console virtual terminal and enable passwords Finally configure the interfaces on each router Step 5 Configure the routing protocol on the BHM router a Goto the proper command mode and enter the following BHM config router rip BHM config router network 192 168 2 0 BHM config router network 192 168 1 0 BHM config router exit BHM config exit Step 6 Save the BHM router configuration BHM copy running config startup config Destination filename startup config Enter Step 7 Verify that the internetwork is functioning by pinging the FastEthernet interface of the other router a From GAD is it possible to ping the BHM router FastEthernet interface No b From BHM is it possible to ping the GAD router FastEthernet interface Yes Step 8 Examine the routing table a After an unsuccessful ping check the routing table with the show ip route command From the GAD router type the following 725 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 9 3 5 Copyright O 2003 Cisco Systems Inc GAD show ip route Is there a route to the BHM Ethernet LAN No GAD show ip route lt output omitted gt Gateway of last resort is not set id
15. ctions at the end of this lab Perform those steps on all routers in this lab assignment before continuing 302 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 9 3 5 Copyright 2003 Cisco Systems Inc Step 1 Configure the hostname passwords and interfaces on the GAD router a Onthe GAD router 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 is a problem doing this refer to the Configuring Router Passwords lab Configure interfaces as shown in the table Step 2 Configure the routing protocol on the GAD router a Go to the proper command mode and enter the following GAD config router rip GAD config router network 192 168 1 0 GAD config router network 192 168 2 0 GAD config router exit GAD config exit Step 3 Save the GAD router configuration GAD copy running config startup config Destination filename startup config Enter Step 4 Configure the hostname and passwords on the BHM router a Onthe BHM router enter the global configuration mode and configure the hostname as shown in the chart Then configure the console virtual terminal and enable passwords Finally configure the interfaces on each router Step 5 Configure the routing protocol on the BHM router a Goto the proper command mode and enter the following BHM config router rip BHM config router network 192 168 2 0 BHM
16. ery 30 seconds next due in 8 seconds Invalid after 180 seconds hold down 180 flushed after 240 Outgoing update filter list for all interfaces is Incoming update filter list for all interfaces is Redistributing rip Default version control send version 1 receive any version Interface Send Recv Triggered RIP Key chain SerialO 1 i 2 Automatic network summarization is in effect Routing for Networks 192 108 1 0 192 1998 2 0 Routing Information Sources Gateway Distance Last Update 192 168 2 1 120 DOsODslL Distance default is 120 Step 10 Change the configuration to route correct networks a After examining the show ip protocols command results it is noticed that the network on the Ethernet LAN is not being routed After examining it further it is found that there is a network that does not belong has been configured to be advertised It is decided this is a typo and it is necessary to correct it Enter the router RIP configuration mode and make the appropriate changes From the BHM router type the following BHM configure terminal BHM config tHtrouter rip BHM config router iino network 192 168 1 0 BHM config router network 192 168 3 0 BHM config router Z 304 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 9 3 5 Copyright 2003 Cisco Systems Inc Step 11 Confirm RIP is routing the correct networks a b Now confirm the new statement corrected the
17. essful Yes Upon completion of the previous steps log off by typing exit and turn the router off 728 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 9 3 5 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 reteadRouter 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 729 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 9 3 5 Copyright O 2
18. esystem 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 reteadRouter 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 307 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 9 3 5 Copyright O 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
19. st interface SerialO ip address 192 168 2 1 255 255 255 0 no ip directed broadcast no ip mroute cache no fair queue clock rate 64000 l interface Seriall no ip address no ip directed broadcast shutdown router rip network 192 168 1 0 network 192 168 2 0 ip classless line con 0 transport input none line aux 0 line vty 0 4 password cisco login end 311 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 9 3 5 Copyright O 2003 Cisco Systems Inc Cisco SYSTEMS Lab 9 3 5 Troubleshooting Routing Issues with show ip route and show ip protocols Instructor Version 2600 Router 1 Router 2 Router Router Fast Interface Serial 0 Subnet mask Enable Enable VTY Designation Name Ethernet O0 type Address for both secret and console Address interfaces password password 192 168 1 1 DCE 192 168 2 1 2552552660 cass cisco GAD 192168 1 Router BHM i9216831 DTE 192 16822 2552552550 cass cisco Straight through cable Serial cable are ar Console Rollover eessssccsecseoscsseoes Crossover cable Objective e Usethe show ip route and show ip protocol commands to diagnose a routing configuration problem 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 260
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