Lab – Troubleshooting Basic Single-Area OSPFv2
Contents
1. ping the IPv6 addresses of the other PC hosts in the topology to verify IPv6 end to end connectivity Note It may be necessary to disable the PC firewall to ping between PCs Step 2 Verify that IPv6 unicast routing has been enabled on all routers a An easy way to verify that IPv6 routing has been enabled on a router is to use the show run section ipv6 unicast command By adding this pipe section to the show run command the ipv6 unicast routing command displays if IPv6 routing has been enabled Note The show run command can also be issued without any pipe and then a manual search for the ipv6 unicast routing command can be done Issue the command on each router Record your findings b If IPv6 unicast routing is not enabled on one or more routers enable it now Record the commands used to correct the issues 2013 Cisco and or its affiliates All rights reserved This document is Cisco Public Page 9 of 12 Lab Troubleshooting Basic Single Area OSPFv2 and OSPFv3 Step 3 Verify that all interfaces are assigned to OSPFv3 area 0 on R1 a Issue the show ipv6 protocols command and verify that the router ID is correct Also verify that the expected interfaces are displayed under area 0 Note If no output is generated from this command then the OSPF v3 process has not been configured Record your findings b Make the necessary configuration changes to R1 Record the commands used to correct the issues Issue2. the clear ipv6 ospf process command if necessary Re issue the show ipv6 protocols command to verify that your changes had the desired effect e Issue the show ipv6 ospf interface brief command to verify that all interfaces are listed as OSPF networks assigned to area 0 f Issue the show ipv6 ospf interface g0 0 command to verify that this interface is set not to advertise OSPF v3 routes g Resolve any problems discovered on R1 List any additional changes made to R1 If no problems were found on the device then respond with no problems were found Step 4 Verify that all interfaces are assigned to OSPFv3 area 0 on R2 a Issue the show ipv6 protocols command and verify the router ID is correct Also verify that the expected interfaces display under area 0 Note If no output is generated from this command then the OSPFv3 process has not been configured Record your findings b Make the necessary configuration changes to R2 Record the commands used to correct the issues Issue the clear ipv6 ospf process command if necessary Re issue the show ipv6 protocols command to verify that your changes had the desired effect e Issue the show ipv6 ospf interface brief command to verify that all interfaces are listed as OSPF networks assigned to area 0 2013 Cisco and or its affiliates All rights reserved This document is Cisco Public Page 10 of 12 Lab Troubleshooting Basic Single Area OSPFv2 and OSPFv3 f Issue
3. 1 db8 acad 13 1 64 ipv address fe80 1 link local ipv ospf 1 area 0 no shutdown router ospf 1 network 192 168 1 0 0 0 0 255 area 0 network 129 168 12 0 0 0 0 3 area 0 network 192 168 13 0 0 0 0 3 area 0 passive interface g0 0 end Router R2 Configuration conf t service password encryption no ip domain lookup hostname R2 enable secret class line con 0 logging synchronous password cisco login line vty 0 password cisco 2013 Cisco and or its affiliates All rights reserved This document is Cisco Public Page 4 of 12 Lab Troubleshooting Basic Single Area OSPFv2 and OSPFv3 login banner motd Unauthorized Access is Prohibited ipv6 unicast routing ipv6 router ospf 1 roOuter 1d 2 26252 interface g0 0 ip address 192 168 2 1 255 255 255 0 ipv6 address 2001 db8 acad B 2 64 ipv address fe80 1 link local no shutdown interface s0 0 0 ip address 192 168 12 2 255 255 255 252 ipv6 address 2001 db8 acad 12 2 64 ipv address fe80 2 link local ipv ospf 1 area 0 no shutdown interface s0 0 1 clock rate 128000 ipv address 2001 db8 acad 23 2 64 ipv address fe80 2 link local no shutdown router ospf 1 network 192 168 2 0 0 0 0 255 area 0 network 192 168 12 0 0 0 0 3 area 0 network 192 168 23 0 0 0 0 3 area 0 end Router R3 Configuration conf t service password encryption no ip domain lookup enable secret class hostname R3 line con 0 logging synchronous password cis
4. Ajaj CISCO Cisco Networking Academy Mind Wide Open Lab Troubleshooting Basic Single Area OSPFv2 and OSPF v3 Topology 2013 Cisco and or its affiliates All rights reserved This document is Cisco Public Page 1 of 12 Lab Troubleshooting Basic Single Area OSPFv2 and OSPFv3 Addressing Table OSPF Device Router ID Interface IP Address Default Gateway 192 168 1 1 24 R1 1 1 1 1 GO0 0 2001 DB8 ACAD A 1 64 N A FE80 1 link local 192 168 12 1 30 0 0 0 2001 DB8 ACAD 12 1 64 N A FE80 1 link local 192 18 13 1 30 S0 0 1 2001 DB8 ACAD 13 1 64 N A FE80 1 link local 192 168 2 1 24 R2 2 2 2 2 GO0 0 2001 DB8 ACAD B 2 64 N A FE80 2 link local 192 168 12 2 30 0 0 0 2001 DB8 ACAD 12 2 64 N A FE80 2 link local 192 168 23 1 30 0 0 1 2001 DB8 ACAD 23 2 64 N A FE80 2 link local 192 168 3 1 24 R3 3 3 3 3 GO0 0 2001 DB8 ACAD C 3 64 N A FE80 3 link local 192 168 13 2 30 0 0 0 2001 DB8 ACAD 13 3 64 N A FE80 3 link local 192 168 23 2 30 S0 0 1 2001 DB8 ACAD 23 3 64 N A FE80 3 link local 192 168 1 3 24 192 168 1 1 eon he 2001 DB8 ACAD A A 64 FE80 1 192 168 2 3 24 192 168 2 1 ee 2001 DB8 ACAD B B 64 FE80 2 192 168 3 3 24 192 168 3 1 PC NIC oe 2001 DB8 ACAD C C 64 FE80 3 2013 Cisco and or its affiliates All rights reserved This document is Cisco Public Page 2 of 12 Lab Troubleshooting Basic Single Area OSPFv2 and
5. If no problems were found on the device then respond with no problems were found 2013 Cisco and or its affiliates All rights reserved This document is Cisco Public Page 8 of 12 Lab Troubleshooting Basic Single Area OSPFv2 and OSPFv3 Step 5 Verify OSPF neighbor information a Issue the show ip ospf neighbor command on all routers to view the OSPF neighbor information Step 6 Verify OSPFv2 Routing Information a Issue the show ip route ospf command to verify that each router has OSPF v2 routes to all non adjoining networks Are all OSPFv2 routes available If any OSPF v2 routes are missing what is missing b If any routing information is missing resolve these issues Step 7 Verify IPv4 end to end connectivity From each PC verify that IPv4 end to end connectivity exists PCs should be able to ping the other PC hosts in the topology If IPv4 end to end connectivity does not exist then continue troubleshooting to resolve any remaining issues Note It may be necessary to disable the PC firewall to ping between PCs Part 4 Troubleshoot OSPFv3 In Part 4 you will troubleshoot OSPFv3 problems and make the necessary changes needed to establish OSPF v3 routes and end to end IPv6 connectivity Note LAN G0 0 interfaces should not advertise OSPFv3 routing information but routes to these networks should be contained in the routing tables Step 1 Test IPv6 end to end connectivity From each PC host
6. OSPFv3 Objectives Part 1 Build the Network and Load Device Configurations Part 2 Troubleshoot Layer 3 Connectivity Part 3 Troubleshoot OSPFv2 Part 4 Troubleshoot OSPFv3 Background Scenario Open Shortest Path First OSPF is a link state routing protocol for IP networks OSPF v2 is defined for IPv4 networks and OSPFv3 is defined for IPv6 networks OSPFv2 and OSPF v3 are completely isolated routing protocols changes in OSPF v2 do not affect OSPF v3 routing and vice versa In this lab a single area OSPF network running OSPFv2 and OSPF v3 is experiencing problems You have been assigned to find the problems with the network and correct them Note The routers used with CCNA hands on labs are Cisco 1941 Integrated Services Routers ISRs with Cisco IOS Release 15 2 4 M3 universalk9 image Other routers and Cisco IOS versions can be used Depending on the model and Cisco IOS version the commands available and output produced might vary from what is shown in the labs Refer to the Router Interface Summary Table at the end of this lab for the correct interface identifiers Note Make sure that the routers have been erased and have no startup configurations If you are unsure contact your instructor Required Resources e 3 Routers Cisco 1941 with Cisco IOS Release 15 2 4 M3 universal image or comparable e 3PCs Windows 7 Vista or XP with terminal emulation program such as Tera Term e Console cables to configure the Cisco IOS d
7. co login line vty 0 password cisco login banner motd Unauthorized Access is Prohibited interface g0 0 ipv6 address 2001 db8 acad c 3 64 ipv address fe80 3 link local interface s0 0 0 clock rate 128000 2013 Cisco and or its affiliates All rights reserved This document is Cisco Public Page 5 of 12 Lab Troubleshooting Basic Single Area OSPFv2 and OSPFv3 ip address 192 168 13 1 255 255 255 252 ipv6 address 2001 db8 acad 13 3 64 ipv6 address fe80 3 link local no shutdown interface s0 0 1 ip address 192 168 23 2 255 255 255 252 ipv6 address 2001 db8 acad 23 3 64 ipv address fe80 3 link local router ospf 1 network 192 168 3 0 0 0 0 255 area 0 passive interface g0 0 end Part 2 Troubleshoot Layer 3 Connectivity In Part 2 you will verify that Layer 3 connectivity is established on all interfaces You will need to test both IPv4 and IPv6 connectivity for all device interfaces Step 1 Verify that the interfaces listed in the Addressing Table are active and configured with the correct IP address information a Issue the show ip interface brief command on all routers to verify that the interfaces are in an up up state Record your findings b Issue the show run interface command to verify IP address assignments on all router interfaces Compare the interface IP addresses against the Addressing Table and verify the subnet mask assignments For IPv6 verify that the link local address has been a
8. et 0 1 Serial 0 0 0 S0 0 0 Serial 0 0 1 S0 0 1 F0 0 F0 1 2900 Gigabit Ethernet 0 0 Gigabit Ethernet 0 1 Serial 0 0 0 S0 0 0 Serial 0 0 1 S0 0 1 G0 0 G0 1 Note To find out how the router is configured look at the interfaces to identify the type of router and how many interfaces the router has There is no way to effectively list all the combinations of configurations for each router class This table includes identifiers for the possible combinations of Ethernet and Serial interfaces in the device The table 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 Cisco IOS commands to represent the interface 2013 Cisco and or its affiliates All rights reserved This document is Cisco Public Page 12 of 12
9. evices via the console ports e Ethernet and serial cables as shown in the topology Part 1 Build the Network and Load Device Configurations In Part 1 you will set up the network topology and configure basic settings on the PC hosts and routers Step 1 Cable the network as shown in the topology Step 2 Configure PC hosts Step 3 Load router configurations Load the following configurations into the appropriate router All routers have the same passwords The privileged EXEC password is cisco The password for console and vty access is class Router R1 Configuration conf t service password encryption no ip domain lookup hostname R1 enable secret class line con 0 logging synchronous 2013 Cisco and or its affiliates All rights reserved This document is Cisco Public Page 3 of 12 Lab Troubleshooting Basic Single Area OSPFv2 and OSPFv3 password cisco login line vty 0 password cisco login banner motd Unauthorized Access is Prohibited ipv6 unicast routing ipv6 router ospf 1 router id 1 1 1 1 passive interface g0 0 interface g0 0 ip address 192 168 1 1 255 255 255 0 ipv6 address 2001 db8 acad a 1 64 ipv6 address fe80 1 link local interface s0 0 0 clock rate 128000 ip address 192 168 12 1 255 255 255 0 ipv6 address 2001 db8 acad 12 1 64 ipv address fe80 1 link local ipv ospf 1 area 0 no shutdown interface s0 0 1 ip address 192 168 13 1 255 255 255 0 ipv6 address 200
10. rectly Record your findings b Make the necessary changes to the configuration on R1 based on the output from the show ip protocols command Record the commands used to correct the issues Issue the clear ip ospf process command if necessary Re issue the show ip protocols command to verify that your changes had the desired effect e Issue the show ip ospf interface brief command to verify that all interfaces are listed as OSPF networks assigned to area 0 f Issue the show ip ospf interface g0 0 command to verify that GO O is a passive interface Note This information is also in the show ip protocols command g Resolve any problems discovered on R1 List any additional changes made to R1 If no problems were found on the device then respond with no problems were found 2013 Cisco and or its affiliates All rights reserved This document is Cisco Public Page 7 of 12 Lab Troubleshooting Basic Single Area OSPFv2 and OSPFv3 Step 3 Verify that all interfaces are assigned to OSPFv2 area 0 on R2 a Issue the show ip protocols command to verify that OSPF is running and that all networks are being advertised in area 0 Verify that the router ID is set correctly Record your findings Make the necessary changes to the configuration on R2 based on the output from the show ip protocols command Record the commands used to correct the issues Issue the clear ip ospf process command if necessary Re issue the show ip pro
11. ssigned Record your findings c Resolve all problems that are found Record the commands used to correct the issues 2013 Cisco and or its affiliates All rights reserved This document is Cisco Public Page 6 of 12 Lab Troubleshooting Basic Single Area OSPFv2 and OSPFv3 d Using the ping command verify that each router has network connectivity with the serial interfaces on the neighbor routers Verify that the PCs can ping their default gateways If problems still exist continue troubleshooting Layer 3 issues Part 3 Troubleshoot OSPFv2 In Part 3 you will troubleshoot OSPFv2 problems and make the necessary changes needed to establish OSPF v2 routes and end to end IPv4 connectivity Note LAN G0 0 interfaces should not advertise OSPF routing information but routes to these networks should be in the routing tables Step 1 Test IPv4 end to end connectivity From each PC host ping the other PC hosts in the topology to verify end to end connectivity Note It may be necessary to disable the PC firewall before testing to ping between PCs a Ping from PC A to PC B Were the pings successful b Ping from PC A to PC C Were the pings successful c Ping from PC B to PC C Were the pings successful Step 2 Verify that all interfaces are assigned to OSPFv2 area 0 on R1 a Issue the show ip protocols command to verify that OSPF is running and that all networks are advertised in area 0 Verify that the router ID is set cor
12. the show ipv6 ospf interface g0 0 command to verify that this interface is not set to advertise OSPF v3 routes g List any additional changes made to R2 If no problems were found on the device then respond with no problems were found Step 5 Verify that all interfaces are assigned to OSPFv3 area 0 on R3 a Issue the show ipv6 protocols command and verify that the router ID is correct Also verify that the expected interfaces display under area 0 Note If no output is generated from this command then the OSPF v3 process has not been configured Record your findings b Make the necessary configuration changes to R3 Record the commands used to correct the issues Issue the clear ipv6 ospf process command if necessary Re issue the show ipv6 protocols command to verify that your changes had the desired effect e Issue the show ipv6 ospf interface brief command to verify that all interfaces are listed as OSPF networks assigned to area 0 f Issue the show ipv6 ospf interface g0 0 command to verify that this interface is set not to advertise OSPF v3 routes g Resolve any problems discovered on R3 List any additional changes made to R3 If no problems were found on the device then respond with no problems were found Step 6 Verify that all routers have correct neighbor adjacency information a Issue the show ipv6 ospf neighbor command to verify that adjacencies have formed between neighboring routers b Resol
13. tocols command to verify that your changes had the desired effect Issue the show ip ospf interface brief command to verify that all interfaces are listed as OSPF networks assigned to area 0 Issue the show ip ospf interface g0 0 command to verify that G0 0 is a passive interface Note This information is also available from the show ip protocols command Resolve any problems discovered on R2 List any additional changes made to R2 If no problems were found on the device then respond with no problems were found Step 4 Verify that all interfaces are assigned to OSPFv2 area 0 on R3 a Issue the show ip protocols command to verify that OSPF is running and that all networks are being advertised in area 0 Verify that the router ID is set correctly as well Record your findings Make the necessary changes to the configuration on R3 based on the output from the show ip protocols command Record the commands used to correct the issues Issue the clear ip ospf process command if necessary Re issue the show ip protocols command to verify that your changes had the desired effect Issue the show ip ospf interface brief command to verify that all interfaces are listed as OSPF networks assigned to area 0 Issue the show ip ospf interface g0 0 command to verify that G0 0 is a passive interface Note This information is also in the show ip protocols command Resolve any problems discovered on R3 List any additional changes made to R3
14. ve any OSPFv3 adjacency issues that still exist 2013 Cisco and or its affiliates All rights reserved This document is Cisco Public Page 11 of 12 Lab Troubleshooting Basic Single Area OSPFv2 and OSPFv3 Step 7 Verify OSPFv3 routing information a Issue the show ipv6 route ospf command and verify that OSPFv3 routes exist to all non adjoining networks Are all OSPFv3 routes available If any OSPF v3 routes are missing what is missing b Resolve any routing issues that still exist Step 8 Verify IPv6 end to end connectivity From each PC verify that IPv6 end to end connectivity exists PCs should be able to ping each interface on the network If IPv6 end to end connectivity does not exist then continue troubleshooting to resolve remaining issues Note It may be necessary to disable the PC firewall to ping between PCs Reflection Why would you troubleshoot OSPFv2 and OSPF v3 separately Router Interface Summary Table Router Interface Summary Router Model Ethernet Interface 1 Ethernet Interface 2 Serial Interface 1 Serial Interface 2 1800 Fast Ethernet 0 0 Fast Ethernet 0 1 Serial 0 0 0 S0 0 0 Serial 0 0 1 S0 0 1 F0 0 F0 1 1900 Gigabit Ethernet 0 0 Gigabit Ethernet 0 1 Serial 0 0 0 S0 0 0 Serial 0 0 1 S0 0 1 G0 0 G0 1 2801 Fast Ethernet 0 0 Fast Ethernet 0 1 Serial 0 1 0 S0 1 0 Serial 0 1 1 S0 1 1 F0 0 F0 1 2811 Fast Ethernet 0 0 Fast Ethern
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