Lab 9.3.7 Troubleshooting Routing Issues with debug – Instructor
Contents
1. router rip version 1 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 320 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 9 3 7 Copyright O 2003 Cisco Systems Inc BHM show running config Building configuration Current configuration version 12 0 no service password encryption l hostname BHM I 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 rap version 1 network 192 168 network 192 168 WID le ip classless line con 0 transport input none line aux 0 line vty 0 4 password cisco login end 321 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 9 3 7 Copyright O 2003 Cisco Systems Inc Cisco SYSTEMS Lab 9 3 7 Troubleshooting Routing Issues with debug Instructor Version 2600 Router 1 Router 2 Router Router Fast Interface Serial 0 Subnet mask Enable Enable VTY Designation Name Ethernet 0 type Address for both secret an2. Press Enter to confirm The response should be Erase of nvram complete Now at the privileged EXEC mode enter the command reload Router config MtreloadRouterttreload 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 740 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 9 3 7 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 the router is configured look at the interfaces
3. 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 e 192 168 1 0 24 is directly connected FastEthernet0 0 C 192 168 2 0 24 is directly connected Serial0 0 R 192 168 3 0 24 120 1 via 192 168 2 2 00 00 01 SerialO O g Justto confirm everything is the working from the GAD router try to ping the LAN interface of the BHM router Was it successful Yes h Ifthis does not correct the problem then repeat the process i If the tests were successful document the changes and back up the configuration Upon completion of the previous steps log off by typing exit and turn the router off 739 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 9 3 7 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
4. 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 741 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 9 3 7 Copyright 2003 Cisco Systems Inc GAD show running config Building configuration Current configuration version 12 0 no service password encryption l hostname GAD I enable secret 5 1 03uG CI4acFapdY8A8CylvUpKq l 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 interface Serial0 1 no ip address no ip directed broadcast shutdown router rip version 1 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
5. Yes op pn 316 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 9 3 7 Copyright O 2003 Cisco Systems Inc 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 e 192 168 1 0 24 is directly connected EthernetO0 e 192 168 2 0 24 is directly connected Serialo R 192 168 3 0 24 120 1 via 192 168 2 2 00 00 01 SerialO g Justto confirm everything is the working from the GAD router try to ping the LAN interface of the BHM router Was it successful Yes h Ifthis does not correct the problem then repeat the process i If the tests were successful document the changes and back up the configuration Upon completion of the previous steps log off by typing exit and turn the router off 317 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 9 3 7 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
6. are not displayed because the RIP versions are incompatible Step 14 Create an action plan a How can the problem be corrected Change the version of RIP on router BHM to be compatible with that of GAD Step 15 Implement the action plan a Trythe solution that was proposed in the previous step Step 16 Observe the results a Now it is necessary to confirm that the solution has solved the problem This is done by reversing the tests that have been previously performed b Observe the routing exchange between the routers using the debug ip rip command and watch the output for a minute or two BHM debug ip rip RIP protocol debugging is on BHM Mar 1 20 27 10 918 RIP received vl update from 192 168 2 1 on Serialo Mar 1 20 27 10 918 192 168 1 0 in 1 hops Mar 1 20 27 12 918 RIP sending v1 flash update to 255 255 255 255 via Serialo 192 168 174 2 Mar 1 20 27 12 918 RIP build flash update entries suppressing null update Mar 1 20 27 29 230 RIP sending vl update to 255 255 255 255 via Serialo 192 168 2 2 Mar 1 20 27 29 230 RIP build update entries suppressing null update Mar 1 20 27 37 710 RIP received v1 update from 192 168 2 1 on Serialo Mar 1 20 27 37 7210 192 168 1 0 in 1 hops Type undebug a11 to stop the output Check the GAD routing table to see if there is a route to BHM using the show ip route Are there any RIP routes Yes Is the route to BHM there
7. 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 Goto the proper command mode and enter the following GAD GAD GAD GAD GAD GAD config H router rip config router network 192 168 1 0 config router network 192 168 2 0 config router version 2 config router exit config exit DP Step 3 Save the GAD router configuration GAD copy running config startup config Destination filename startup config Enter Step 4 Configure the hostname passwords and interfaces 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 Configure interfaces as shown in the table Step 5 Configure the routing protocol on the BHM router a Gotothe proper command mode and enter the following BHM config HGrouter rip BHM config router network 192 168 2 0 BHM config router network 192 168 3 0 BHM config router version 1 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 Gather Facts by asking and listening a Afte
8. end 742 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 9 3 7 Copyright 2003 Cisco Systems Inc BHM show running config Building configuration Current configuration version 12 0 no service password encryption l hostname BHM I enable secret 5 1 iQzD hHdQsscpbSdVj63u69J1X1 l ip subnet zero 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 2 255 255 255 0 no ip directed broadcast no ip mroute cache no fair queue interface Serial0 1 no ip address no ip directed broadcast shutdown router rap version 1 network 192 168 network 192 168 WID elo ip classless line con 0 transport input none line aux 0 line vty 0 4 password cisco login end 743 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 9 3 7 Copyright 2003 Cisco Systems Inc
9. 0 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 319 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 9 3 7 Copyright 2003 Cisco Systems Inc GAD show running config Building configuration Current configuration version 12 0 no service password encryption l hostname GAD I enable secret 5 1 03uG CI4acFapdY8A8CylvUpKq ip subnet zero interface Ethernet0 ip address 192 168 1 1 255 255 255 0 no ip directed broadcast interface SerialO lp address 192 168 2 1 255 255 255 0 no ip directed broadcast no ip mroute cache no fair queue clock rate 64000 interface Seriall no ip address no ip directed broadcast shutdown
10. 4 RIP build update entries suppressing null update Mar 1 20 18 49 346 RIP sending v2 update to 224 0 0 9 via SerialO 192 158 22 Mar 1 20 18 49 346 RIP build update entries suppressing null update Mar 1 20 18 51 210 RIP ignored vl packet from 192 168 2 1 illegal version BHM debug ip packet IP packet debugging is on BHM Mar 1 20 21 06 802 IP s 192 168 17 1 Serialo d 224 0 0 10 len 60 unroutable Mar 1 20 21 11 474 IP s 192 168 17 1 Serialo ds224 0 0 10 len 60 unroutable Mar 1 20 21 11 538 IP s 192 168 17 1 Serial d 255 255 255 255 len 52 rova 2 Mar 1 20 21 16 182 IP s 192 168 17 1 SerialO d 224 0 0 10 len 60 unroutable Mar 1 20 21 20 982 IP s 192 168 17 1 SerialO d 224 0 0 10 len 60 unroutable 315 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 9 3 7 Copyright O 2003 Cisco Systems Inc Mar 1 20 21 25 534 IP 192 168 17 1 Serialo d 224 0 0 10 len 60 unroutable d Are there routing updates being passed Yes e Whatis happening to the routing updates from BHM They are being ignored because they are the wrong version f Type undebug all to stop the output Step 13 Consider the possibilities a From the information discovered through the troubleshooting process what are the possible problems The debug ip rip command shows that the routing updates
11. Cisco SYSTEMS Lab 9 3 7 Troubleshooting Routing Issues with debug Instructor Version 2500 Router 1 Router 2 Router Router Fast Interface Serial 0 Subnet mask Enable Enable VTY Designation Name Ethernet 0 type Address for both secret and console Address interfaces password password Straight through cable Serial cable a a Console Rollover sesosoccsoseccccccece Crossover cable Objective e Utilize a systematic OSI troubleshooting process to diagnose routing problems e Use various show commands to gather information e Use debug commands and logging 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 instructions at the end of this lab Perform those steps on all routers in this lab assignment before co
12. 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 Reuterteonfig treleadRouter 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 318 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 9 3 7 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 81 250
13. d console Address interfaces password password Straight through cable Serial cable a a Console Rollover sesosoccsoseccccccece Crossover cable Objective e Utilize a systematic OSI troubleshooting process to diagnose routing problems e Use various show commands to gather information e Use debug commands and logging 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 instructions at the end of this lab Perform those steps on all routers in this lab assignment before continuing 734 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 9 3 7 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
14. ese the correct networks Yes 314 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 9 3 7 Copyright O 2003 Cisco Systems Inc GAD show ip protocol Routing Protocol is rip Sending updates every 30 seconds next due in 16 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 2 receive version 2 Interface Send Recv Triggered RIP Key chain EthernetO 2 2 Serialo 2 2 Automatic network summarization is in effect Routing for Networks 192 198 1 0 192 198 2 0 Routing Information Sources Gateway Distance Last Update 192 108 2 2 120 00 10 58 Distance default is 120 Step 12 Gather Facts to identify the exact problem a Now that a routing issue has been confirmed the exact source of the routing problem needs to be discovered so it can be corrected To observe the routing exchange between the routers will use the debug ip rip command From a GAD console type the debug ip packet command and watch the output for a minute 0 r two Record a sample of output from GAD or BHM B HM debug ip rip RIP protocol debugging is on B HM gp A Mar 1 20 18 23 074 RIP sending v2 update to 224 0 0 9 via SerialO 192 168 2 2 Mar 1 20 18 23 07
15. faces serial 0 SerialO0 is up line protocol is up output omitted Now that it is known that the line and protocol are both up test the Data Link layer From the GAD router issue the show CDP neighbors command to confirm that the BHM router is a neighbor to the GAD router serial 0 interface Is BHM shown as a neighbor on interface serial 0 Yes GAD show cdp neighbors Capability Codes R Router T Trans Bridge B Source Route Bridge S Switch H Host I IGMP r Repeater Device ID Local Intrfce Holdtme Capability Platform Port ID BHM Ser 0 151 R 2500 Ser 0 Step 10 Examine the routing table a It looks like the data link layer is good Time to move up and examine the network layer Check the GAD routing table to see if there is a route to the BHM LAN To do this issue the show ip route command on the GAD router Is the route there No Are there any RIP routes No GAD show ip route output omitted Gateway of last resort is not set C 192 168 1 0 24 is directly connected EthernetO0 c 192 168 2 0 24 is directly connected Serialo Step 11 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 GAD router type the following GAD show ip protocols What networks is RIP routing 192 168 1 0 192 168 2 0 Are th
16. lution that was proposed in the previous step Step 16 Observe the results a Now it is necessary to confirm that the solution has solved the problem This is done by reversing the tests that have been previously performed b Observe the routing exchange between the routers using the debug ip rip command and watch the output for a minute or two BHM debug ip rip RIP protocol debugging is on BHM Mar 1 20 27 10 918 RIP received vl update from 192 168 2 1 on Serial0 0 Mar 1 20 27310 918 192 168 1 0 in 1 hops Mar 1 205 27 12 918 RIP sending vl flash update to 255 255 255 255 via Serial0 0O 192 168 17 2 Mar 1 20 27 12 918 RIP build flash update entries suppressing null update Mar 1 20 27 29 230 RIP sending vl update to 255 255 255 255 via Serial0 0 192 168 2 2 Mar 1 20 27 29 230 RIP build update entries suppressing null update Mar 1 20 27 37 710 RIP received vl update from 192 168 2 1 on Serial0 0 Mar 1 2042737710 192 168 1 0 in 1 hops Type undebug a11 to stop the output Check the GAD routing table to see if there is a route to BHM using the show ip route Are there any RIP routes Yes Is the route to BHM there Yes os SS 738 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 9 3 7 Copyright O 2003 Cisco Systems Inc GAD show ip route Codes C connected S static I IGRP R RIP M mobile B BGP D EIGRP EX EIGRP external
17. ntinuing 312 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 9 3 7 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 Goto the proper command mode and enter the following GAD GAD GAD GAD GAD GAD config H router rip config router network 192 168 1 0 config router network 192 168 2 0 config router version 2 config router exit config exit DP Step 3 Save the GAD router configuration GAD copy running config startup config Destination filename startup config Enter Step 4 Configure the hostname passwords and interfaces 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 Configure interfaces as shown in the table Step 5 Configure the routing protocol on the BHM router a Gotothe proper command mode and enter the following BHM config HGrouter rip BHM config router network 192 168 2 0 BHM config router network 192 168 3 0 BHM config ro
18. pressing null update Mar 1 20 18 51 210 RIP ignored vl packet from 192 168 2 1 illegal version BHM debug ip packet IP packet debugging is on BHM Mar 1 20 21 00 9027 IPs gel 168 17 Serial0 0 d 224 0 10 len 60 unroutable Mar 1 Ze SH 474 IPs 2192 168 17 Serial0 0 d 224 0 10 len 60 unroutable Mar d 20 221 115 5395 JP 85192 168 17 4 Serial0 0 de255 255 255 255 len 52 revd 2 Mar 1 20221 10 192 IPs 2192 1569 17 Serial0 0 d 224 0 10 len 60 unroutable NMar 1 20 21 20 982z IPs 82192 168 17 Serial0 0 d 224 0 10 len 60 unroutable 737 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 9 3 7 Copyright O 2003 Cisco Systems Inc Mar 1 20 21 25 534 IP s s 192 168 17 1 Serial0 0 d 224 0 0 10 len 60 unroutable d Are there routing updates being passed Yes e Whatis happening to the routing updates from BHM They are being ignored because they are the wrong version f Type undebug all to stop the output Step 13 Consider the possibilities a From the information discovered through the troubleshooting process what are the possible problems The debug ip rip shows that the routing updates are not being entered into the routing table The RIP versions are incompatible Step 14 Create an action plan a How can the problem be corrected Change the version of RIP on router BHM to be compatible with that of GAD Step 15 Implement the action plan a Trythe so
19. r asking around it was found that a network associate on the night shift changed some of the routing parameters on the routers for a circuit between the GAD office and the BHM office Unfortunately proper procedure was not followed and no documentation was created on these changes 735 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 9 3 7 Copyright 2003 Cisco Systems Inc Step 8 Gather facts test basic functionality Verify that the internetwork is not functioning by pinging the LAN interfaces a b From GAD is it possible to ping the BHM router FastEthernet interface No From BHM is it possible to ping the GAD router FastEthernet interface No Step 9 Gather Facts by starting testing to isolate the problem a This confirmed that there is no reachability between GAD and BHM Even though it is suspected that there is a routing issue the temptation to go right to testing routing is resisted Instead good scientific troubleshooting method is followed First start at the Physical layer and confirm the WAN link circuit is up From the GAD router issue the show interfaces serial 0 command to confirm that the line and protocol is up Are they both up Yes GAD show interfaces serial 0 0 Serial0 0 is up line protocol is up output omitted Now that it is known that the line and protocol are both up test the Data Link layer From the GAD router issue the show CDP neighbors command to confirm that the BHM rou
20. ter is a neighbor to the GAD router serial 0 interface Is BHM shown as a neighbor on interface serial 0 Yes GAD show cdp neighbors Capability Codes R Router T Trans Bridge B Source Route Bridge S Switch H Host I IGMP r Repeater Device ID Local Intrfce Holdtme Capability Platform Port ID BHM Ser 0 0 151 R 2600 Ser 0 0 Step 10 Examine the routing table a It looks like the data link layer is good Time to move up and examine the network layer Check the GAD routing table to see if there is a route to the BHM LAN To do this issue the show ip route command on the GAD router Is the route there No Are there any RIP routes No GAD show ip route output omitted Gateway of last resort is not set E 192 168 1 0 24 is directly connected FastEthernet0 0 C 192 168 2 0 24 is directly connected Serial0 0 Step 11 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 GAD router type the following GAD show ip protocols What networks is RIP routing 192 168 1 0 192 168 2 0 Are these the correct networks Yes 736 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 9 3 7 Copyright O 2003 Cisco Systems Inc GAD show ip protocol R outing Protocol is rip Sending updates every 30 seconds next d
21. ue in 16 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 2 receive version 2 Interface Send Recv Triggered RIP Key chain FastEthernet0 0 2 2 Serial0 O0 2i 2 Automatic network summarization is in effect Routing for Networks 192 198 1 0 192 198 2 0 Routing Information Sources Gateway Distance Last Update 192 168 2 2 120 00 10 58 Distance default is 120 Step 12 Gather Facts to identify the exact problem a Now that a routing issue has been confirmed the exact source of the routing problem needs to be discovered so it can be corrected To observe the routing exchange between the routers will use the debug ip rip command From a GAD console type the debug ip packet command and watch the output for a minute or two Record a sample of output from GAD or BHM BHM debug ip rip RIP protocol debugging is on BHM D Mar 1 20 18 23 074 RIP sending v2 update to 224 0 0 9 via Serial0 0 192 168 2 2 Mar 1 20 18 23 074 RIP build update entries suppressing null update Mar 1 20 18 49 346 RIP sending v2 update to 224 0 0 9 via Serial0 0 192 158 2 2 Mar 1 20 18 49 346 RIP build update entries sup
22. uter version 1 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 Gather Facts by asking and listening a After asking around it was found that a network associate on the night shift changed some of the routing parameters on the routers for a circuit between the GAD office and the BHM office Unfortunately proper procedure was not followed and no documentation was created on these changes 313 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 9 3 7 Copyright O 2003 Cisco Systems Inc Step 8 Gather facts test basic functionality Verify that the internetwork is not functioning by pinging the LAN interfaces a b From GAD is it possible to ping the BHM router FastEthernet interface No From BHM is it possible to ping the GAD router FastEthernet interface No Step 9 Gather Facts by starting testing to isolate the problem a This confirmed that there is no reachability between GAD and BHM Even though it is suspected that there is a routing issue the temptation to go right to testing routing is resisted Instead good scientific troubleshooting method is followed First start at the Physical layer and confirm the WAN link circuit is up From the GAD router issue the show interfaces serial 0 command to confirm that the line and protocol is up Are they both up Yes GAD show inter
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