Lab 1.2.6 Troubleshooting RIP v2 using debug – 2500 Series
Contents
1. Receive routing update Send an update Build update entries c Turn off debugging by typing either no debug ip riporundebug all Step 11 Enable RIP Version 2 Routing Enable version 2 of the RIP routing protocol on the GAD router only GAD config router rip GAD config router version 2 Step 12 Start the debug function again on the GAD router a Does a problem occur now that we have RIP v2 on the GAD router Yes b What is the problem Step 13 Clear the routing table a Instead of waiting for the routes to time out type clear ip route Thentype show ip route b What has happened to the routing table The route to 172 18 0 1 is no longer there b Will it be updated to include RIP routes if the debug output says the update is ignored No Step 14 Start the debug RIP function a Start the debug RIP function on the BHM router again by typing debug ip rip 69 577 CCNA 3 Switching Basics and Intermediate Routing v 3 1 Lab 1 2 6 Copyright 2003 Cisco Systems Inc b Does a problem occur now that RIP v2 is on the GAD router Yes c What is the problem It is rejecting updates from GAD because of the version difference Step 15 Clear the routing table a Instead of waiting for the routes to time out type clear ip route Then type show ip route b What has happened to the routing table Route to 172 16 0 0 24 is no longer there c Does a problem occur now that RIP v2 is on the GAD router No d Turn off2. Step 16 Enable RIP version 2 routing Enable version 2 of the RIP routing protocol on the BHM router BHM config router rip BHM config router version 2 Step 17 Use the debug function to see packet traffic on a router a Use the debug function to see packet traffic on the GAD router by typing debug ip packet at the privileged EXEC mode b When an RIP update is sent how many source addresses are used 2 c Why are multiple source addresses used One for each network the router will send and receive updates with d What is the source address used 172 16 0 1 and 172 17 1 1 e Why is this address used It is the originating interface from which the packet is sent Step 18 Start the debug RIP database function again on the BHM router a Start the RIP database debugging by typing debug ip rip database then clear the routing table by typing clear ip route b Are the old routes in the table deleted Yes c Are new routes added back into the table Yes d What does the last entry in the debug output say RIP DB Adding new rndb entry 172 18 0 0 16 e Turn off debugging by typing either no debug ip riporundebug all Step 19 Use the debug events function to see routing updates a Use the debug function to see routing updates by typing debug ip rip events in privileged EXEC mode on the BHM router b What interfaces are the routing updates sent on FastEthernet 0 0 and Serial 0 0 c How many routes are in the ro
3. c How many routes are in the routing updates being sent 2 Once the previous steps are completed log off by typing exit and turn the router off Then remove and store the cables and adapter 70 577 CCNA 3 Switching Basics and Intermediate Routing v 3 1 Lab 1 2 6 Copyright 2003 Cisco Systems Inc Erasing and reloading the router Enter into the privileged EXEC mode by typing enable Router gt enable If prompted for a password enter class If that does not work ask the instructor for assistance 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 Router 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 Now the router is ready for the assigned lab to be performed 71 577
4. IP EIGRP information error IP error debugging ftp FTP dialogue html HTML connections http HTTP connections icmp ICMP transactions igrp IGRP information interface IP interface configuration changes 75 577 CCNA 3 Switching Basics and Intermediate Routing v 3 1 Lab 1 2 6 Copyright 2003 Cisco Systems Inc mpacket IP multicast packet debugging nat NAT events ospf OSPF information packet General IP debugging and IPSO security transactions peer IP peer address activity policy Policy routing rip RIP protocol transactions routing Routing table events rtp RTP information security IP security options socket Socket event tcp TCP information tempacl IP temporary ACL udp UDP based transactions b Which routing protocols can use debug commands eigrp igrp ospf rip Step 9 Show the debug IP RIP options a At the privileged EXEC mode type debug ip rip database RIP database events events RIP protocol events trigger RIP trigger extension b How many options are available for debug ip rip 3 Step 10 Show the RIP routing updates a From the enable privileged EXEC mode examine the routing table entries using command debug ip rip command on each router b What are the three operations that take place listed in the rip debug statements Receive routing update Send an update Build update entries c Turn off debugging by typing eitherno debug ip ripor
5. be lost GAD copy running config startup config Destination filename startup config Enter Step 4 Configure the routing protocol on the BHM router Go to the proper command mode and configure RIP routing on the BHM router according to the chart BHM config router rip BHM config router network 172 18 0 0 BHM config router network 172 17 0 0 BHM config router exit BHM config exit Step 5 Save the BHM router configuration BHM copy running config startup config Destination filename startup config Enter Step 6 Configure the hosts with the proper IP address subnet mask and default gateway Host connected to router GAD IP Address 172 16 0 2 Subnet mask 259 25500 Default gateway 172 16 0 1 Host connected to router BHM IP Address 172 138 0 2 Subnet mask 255255 0 al Default gateway 172 18 0 1 Step 7 Verify that the internetwork is functioning by pinging the FastEthernet interface of the other router a From the host attached to the GAD ping the other host attached to the BHM router Was the ping successful Yes b From the host attached to the BHM ping the other host attached to the GAD router Was the ping successful Yes c If the answer is no for either question troubleshoot the router configurations to find the error Then do the pings again until the answer to both questions is yes Step 8 Show the debug IP options a At the privileged EXEC mod
6. debugging by typing either no debug ip riporundebug all Step 16 Enable RIP version 2 routing Enable version 2 of the RIP routing protocol on the BHM router BHM config router rip BHM config router version 2 Step 17 Use the debug function to see packet traffic on a router a Use the debug function to see packet traffic on the GAD router by typing debug ip packet at the privileged EXEC mode b When an RIP update is sent how many source addresses are used 2 c Why are multiple source addresses used One for each network the router will send and receive updates with d What is the source address used 172 16 0 1 and 172 17 1 1 e Why is this address used It is the originating interface from which the packet is sent Step 18 Start the debug RIP database function again on the BHM router a Start the RIP database debugging by typing debug ip rip database then clear the routing table by typing clear ip route b Are the old routes in the table deleted Yes Are new routes added back into the table Yes d What does the last entry in the debug output say RIP DB Adding new rndb entry 172 18 0 0 16 e Turn off debugging by typing either no debug ip riporundebug all Step 19 Use the debug events function to see routing updates a Use the debug function to see routing updates by typing debug ip rip events in privileged EXEC mode on the BHM router b What interfaces are the routing updates sent on Ethernet 0 and Serial 0
7. 1 Router 2 Router Router FastEthernet 0 Interface SerialO Subnet Mask Enable Enable VTY Designation Name Address Type Address for Both Secret and Console Interfaces Password Passwords Rower GAD 1721601 DoE 17217 11 25525500 class oseo Router BHM 1721601 ote 17217412 25525500 class ciso Straight through cable Serial cable ee Console Rollover eee eeeeseesccsecseees Crossover cable eee ee m lio Objective e Configure RIP v2 on both routers e Use debug commands to verify proper RIP operation and analyze data transmitted between routers Background Preparation Cable a network similar to the one shown in the diagram Any router that meets the interface requirements displayed on the above diagram may be used For example router series 800 1600 1700 2500 and 2600 or any such combination can 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 slightly different output Perform the following steps 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 Step 1
8. BHM BHM config enable secret class BHM config line console 0 BHM config line password cisco BHM config line login BHM config line line vty 0 4 BHM config line password cisco BHM config line login BHM config line exit BHM config interface serial 0 0 BHM config if ip address 172 17 1 2 255 255 0 0 BHM config if no shutdown BHM config if exit BHM config interface fastEthernet 0 0 BHM config if ip address 172 18 0 1 255 255 0 0 BHM config if no shutdown BHM config if exit BHM config ip host GAD 172 16 0 1 172 17 1 1 ee nasm Narn Step 2 Configure the routing protocol on the GAD router Go to the proper command mode and configure RIP routing on the GAD router according to the chart GAD config router rip GAD config router network 172 16 0 0 GAD config router network 172 17 0 0 GAD config router exit GAD config exit esas l 74 577 CCNA 3 Switching Basics and Intermediate Routing v 3 1 Lab 1 2 6 Copyright 2003 Cisco Systems Inc Step 3 Save the GAD router configuration Any time that changes are correctly made to the running configuration they should be saved to the startup configuration Otherwise if the router is reloaded or power cycled the changes that are not in the startup configuration will be lost GAD copy running config startup config Destination filename startup config Enter Step 4 Configu
9. CCNA 3 Switching Basics and Intermediate Routing v 3 1 Lab 1 2 6 Copyright 2003 Cisco Systems Inc Router Interface Summary Ethernet Ethernet Serial Serial Router Model Interface 1 Interface 2 Interface 1 Interface 2 800 806 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 S1 2500 Ethernet 0 EO Ethernet 1 E1 Serial 0 SO Serial 1 S1 2600 aoe 9 FastEthernet 0 1 FA0 1 Serial 0 0 S0 0 Serial 0 1 S0 1 In order to find out exactly how the router is configured look at the interfaces used in IOS command to represent the interface This will identify what type and 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 72 577 CCNA 3 Switching Basics and Intermediate Routing v 3 1 Lab 1 2 6 Copyright 2003 Cisco Systems Inc Cisco SYSTEMS A rede Lab 1 2 6 Troubleshooting RIP v2 using debug 2600 Series PY i T Router
10. Cisco SYSTEMS A rede Lab 1 2 6 Troubleshooting RIP v2 using debug 2500 Series PY celia T Router 1 Router 2 Router Router FastEthernet 0 Interface SerialO Subnet Mask Enable Enable VTY Designation Name Address Type Address for Both Secret and Console Interfaces Password Passwords Rower GAD 1721601 DoE 17217 11 25525500 class oseo Router BHM 17218014 ote 17217412 25525500 cass cisco Straight through cable Serial cable eo Console Rollover sesososscososooososso Crossover cable eee ee l iliI Objective e Configure RIP v2 on both routers e Use debug commands to verify proper RIP operation and analyze data transmitted between routers Background Preparation Cable a network similar to the one shown in the diagram Any router that meets the interface requirements displayed on the above diagram may be used For example router series 800 1600 1700 2500 and 2600 or any such combination can 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 slightly different output Perform the following steps 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 rel
11. Configure the routers On the routers configure the hostnames as well as the console virtual terminal and enable secret passwords Next configure the serial interface IP address and clock rate and the Fast Ethernet interface IP address Finally configure IP host names If there are problems performing the basic configuration refer to the Review of Basic Configuration including RIP lab Optional interface descriptions and message of the day banners may also be configured Be sure to save the configurations just created 73 577 CCNA 3 Switching Basics and Intermediate Routing v 3 1 Lab 1 2 6 Copyright 2003 Cisco Systems Inc Router1 Router gt enable Router configure terminal Router config hostname GAD GAD config enable secret class GAD config line console 0 GAD config line password cisco GAD config line login GAD config line line vty 0 4 GAD config line password cisco GAD config line login GAD config line exit GAD config interface serial 0 0 GAD config if ip address 172 17 1 1 255 255 0 0 GAD config if clock rate 64000 GAD config if no shutdown GAD config if exit GAD config interface fastEthernet 0 0 GAD config if ip address 172 16 0 1 255 255 0 0 GAD config if no shutdown GAD config if exit GAD config ip host BMH 172 18 0 1 172 17 1 2 ar a ee Router2 Router gt enable Router configure terminal Router config hostname
12. a a Rann Router2 Router gt enable Router configure terminal Router config hostname BHM BHM config enable secret class BHM config line console 0 BHM config line password cisco BHM config line login BHM config line line vty 0 4 BHM config line password cisco BHM config line login BHM config line exit BHM config interface serial 0 BHM config if ip address 172 17 1 2 255 255 0 0 BHM config if no shutdown BHM config if exit BHM config interface ethernet 0 BHM config if ip address 172 18 0 1 255 255 0 0 BHM config if no shutdown BHM config if exit BHM config ip host GAD 172 16 0 1 172 17 1 1 ee Nas Narn Step 2 Configure the routing protocol on the GAD router Go to the proper command mode and configure RIP routing on the GAD router according to the chart GAD config router rip GAD config router network 172 16 0 0 GAD config router network 172 17 0 0 GAD config router exit GAD config exit pee eee bane bee 67 577 CCNA 3 Switching Basics and Intermediate Routing v 3 1 Lab 1 2 6 Copyright 2003 Cisco Systems Inc Step 3 Save the GAD router configuration Any time that changes are correctly made to the running configuration they should be saved to the startup configuration Otherwise if the router is reloaded or power cycled the changes that are not in the startup configuration will
13. e type debug ip cache IP cache operations dhcp Dynamic Host Configuration Protocol eigrp IP EIGRP information error IP error debugging ftp FTP dialogue html HTML connections http HTTP connections icmp ICMP transactions igrp IGRP information interface IP interface configuration changes 68 577 CCNA3 Switching Basics and Intermediate Routing v 3 1 Lab 1 2 6 Copyright 2003 Cisco Systems Inc mpacket IP multicast packet debugging nat NAT events ospf OSPF information packet General IP debugging and IPSO security transactions peer IP peer address activity policy Policy routing rip RIP protocol transactions routing Routing table events rtp RTP information security IP security options socket Socket event tcp TCP information tempacl IP temporary ACL udp UDP based transactions b Which routing protocols can use debug commands eigrp igrp ospf rip Step 9 Show the debug IP RIP options a At the privileged EXEC mode type debug ip rip database RIP database events events RIP protocol events trigger RIP trigger extension b How many options are available for debug ip rip 3 Step 10 Show the RIP routing updates a From the enable privileged EXEC mode examine the routing table entries using command debug ip rip command on each router b What are the three operations that take place listed in the rip debug statements
14. mediate Routing v 3 1 Lab 1 2 6 Copyright 2003 Cisco Systems Inc Router Interface Summary Ethernet Ethernet Serial Serial Router Model Interface 1 Interface 2 Interface 1 Interface 2 800 806 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 S1 2500 Ethernet 0 EO Ethernet 1 E1 Serial 0 SO Serial 1 S1 2600 aoe 9 FastEthernet 0 1 FA0 1 Serial 0 0 S0 0 Serial 0 1 S0 1 In order to find out exactly how the router is configured look at the interfaces used in IOS command to represent the interface This will identify what type and 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 79 577 CCNA 3 Switching Basics and Intermediate Routing v 3 1 Lab 1 2 6 Copyright 2003 Cisco Systems Inc
15. oad instructions at the end of this lab Perform those steps on all routers in this lab assignment before continuing Step 1 Configure the routers On the routers configure the hostnames as well as the console virtual terminal and enable secret passwords Next configure the serial interface IP address and clock rate and the Fast Ethernet interface IP address Finally configure IP host names If there are problems performing the basic configuration refer to the Review of Basic Configuration including RIP lab Optional interface descriptions and message of the day banners may also be configured Be sure to save the configurations just created 66 577 CCNA 3 Switching Basics and Intermediate Routing v 3 1 Lab 1 2 6 Copyright 2003 Cisco Systems Inc Routerl Router gt enable Router configure terminal Router config hostname GAD GAD config enable secret class GAD config line console 0 GAD config line password cisco GAD config line login GAD config line line vty 0 4 GAD config line password cisco GAD config line login GAD config line exit GAD config interface serial 0 GAD config if ip address 172 17 1 1 255 255 0 0 GAD config if clock rate 64000 GAD config if no shutdown GAD config if exit GAD config interface ethernet 0 GAD config if ip address 172 16 0 1 255 255 0 0 GAD config if no shutdown GAD config if exit GAD config ip host BMH 172 18 0 1 172 17 1 2
16. re the routing protocol on the BHM router Go to the proper command mode and configure RIP routing on the BHM router according to the chart BHM config router rip BHM config router network 172 18 0 0 BHM config router network 172 17 0 0 BHM config router exit BHM config exit Step 5 Save the BHM router configuration BHM copy running config startup config Destination filename startup config Enter Step 6 Configure the hosts with the proper IP address subnet mask and default gateway Host connected to router GAD IP Address 172 16 0 2 Subnet mask 259 25500 Default gateway 172 16 0 1 Host connected to router BHM IP Address 172 138 0 2 Subnet mask 255255 0 al Default gateway 172 18 0 1 Step 7 Verify that the internetwork is functioning by pinging the FastEthernet interface of the other router a From the host attached to the GAD ping the other host attached to the BHM router Was the ping successful Yes b From the host attached to the BHM ping the other host attached to the GAD router Was the ping successful Yes c If the answer is no for either question troubleshoot the router configurations to find the error Then do the pings again until the answer to both questions is yes Step 8 Show the debug IP options a At the privileged EXEC mode type debug ip cache IP cache operations dhcp Dynamic Host Configuration Protocol eigrp
17. undebug all Step 11 Enable RIP Version 2 Routing Enable version 2 of the RIP routing protocol on the GAD router only GAD config router rip GAD config router version 2 Step 12 Start the debug function again on the GAD router a Does a problem occur now that we have RIP v2 on the GAD router Yes b What is the problem It does not accept updates from BHM because of the version difference Step 13 Clear the routing table a Instead of waiting for the routes to time out type clear ip route Then type show ip route b What has happened to the routing table The route to 172 18 0 1 is no longer there c Will it be updated to include RIP routes if the debug output says the update is ignored No Step 14 Start the debug RIP function a Start the debug RIP function on the BHM router again by typing debug ip rip b Does a problem occur now that RIP v2 is on the GAD router Yes 76 577 CCNA 3 Switching Basics and Intermediate Routing v 3 1 Lab 1 2 6 Copyright 2003 Cisco Systems Inc c What is the problem It is rejecting updates from GAD because of the version difference Step 15 Clear the routing table a Instead of waiting for the routes to time out type clear ip route Then type show ip route b What has happened to the routing table Route to 172 16 0 0 24 is no longer there Does a problem occur now that RIP v2 is on the GAD router No Turn off debugging by typing either no debug ip riporundebug all
18. uting updates being sent 2 Once the previous steps are completed log off by typing exit and turn the router off Then remove and store the cables and adapter 77 577 CCNA 3 Switching Basics and Intermediate Routing v 3 1 Lab 1 2 6 Copyright 2003 Cisco Systems Inc Erasing and reloading the router Enter into the privileged EXEC mode by typing enable Router gt enable If prompted for a password enter class If that does not work ask the instructor for assistance 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 Router 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 Now the router is ready for the assigned lab to be performed 78 577 CCNA 3 Switching Basics and Inter
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