Lab 5.1.5 Troubleshooting Configuration Register Boot Problems
Contents
1. Copyright c 1986 2002 by cisco Systems Inc Compiled Mon 02 Dec 02 23 45 by kellythw Image text base 0x03041E94 data base 0x00001000 ROM System Bootstrap Version 11 0 10c SOFTWARE BOOTLDR 3000 Bootstrap Software IGS BOOT R Version 11 0 10c RELEASE SOFTWARE fc1 GAD uptime is 43 minutes System returned to ROM by reload System image file is flash c2500 i 1 121 18 bin cisco 2500 68030 processor revision N with 14336K 2048K bytes of memory Processor board ID 08026577 with hardware revision 00000001 Bridging software X 25 software Version 3 0 0 Basic Rate ISDN software Version 1 1 1 Ethernet IEEE 802 3 interface s 2 Serial network interface s 1 ISDN Basic Rate interface s 32K bytes of non volatile configuration memory 16384K bytes of processor board System flash Read ONLY 165 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 5 1 5 Copyright 2003 Cisco Systems Inc Cisco SYSTEMS Lab 5 1 5 Troubleshooting Configuration Register Boot Problems Instructor Version 2600 Router Router Enable Enable VTY and designation name secret Console passwor passwords Straight through cable Serial cable E ee Console Rollover eeccccccccccscscccoon Crossover cable Objective e Check and document the configuration register settings related to boot method e Configure the router to boot using the confi2. 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 The router is ready for the assigned lab to be performed 161 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 5 1 5 Copyright 2003 Cisco Systems Inc Router Interface Summary Router Ethernet Ethernet Serial Serial Interface Model Interface 1 Interface 2 Interface 1 Interface 2 5 800 806 Ethernet 0 EO Ethernet 1 E1 1600 Ethernet 0 EO Ethernet 1 E1 Serial 0 SO Serial 1 S1 1700 FastEthernet 0 FAO FastEthernet 1 FA1 Serial 0 SO Serial 1 81 2500 Ethernet 0 EO Et
3. returned to ROM by reload System image file is flash c2600 is mz 122 12 bin cisco 2621 MPC860 processor revision 0x600 with 60416K 5120K bytes of memory Processor board ID JAD054304U6 196842265 M860 processor part number 0 mask 49 Bridging software X 25 software Version 3 0 0 2 FastEthernet IEEE 802 3 interface s 2 Low speed serial sync async network interface s 32K bytes of non volatile configuration memory 16384K bytes of processor board System flash Read Write GAD show running config Building configuration Current configuration 539 bytes version 12 2 service timestamps debug uptime service timestamps log uptime no service password encryption hostname GAD ip subnet zero all rsvp sync eel 171 interface FastEthernet0 0 no ip address shutdown duplex auto Speed auto interface Serial0 0 no ip address shutdown interface FastEthernet0 1 no ip address 586 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 5 1 5 Copyright 2003 Cisco Systems Inc shutdown duplex auto speed auto interface Serial0 1 no ip address shutdown ip classless ip http server dial peer cor custom T line con 0 line aux 0 line vty 0 4 login end GAD 587 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 5 1 5 Copyright O 200
4. 3 Cisco Systems Inc
5. Cisco SYSTEMS Lab 5 1 5 Troubleshooting Configuration Register Boot Problems Instructor Version 2500 Router Router Enable Enable VTY and designation name secret Console passwor passwords Straight through cable Serial cable Se SS Console Rollover eecccccccccccccccccoon Crossover cable Objective e Check and document the configuration register settings related to boot method e Configure the router to boot using the configuration file in NVRAM and reload the router Background Preparation Setup a network as displayed in the figure Any router that meets the interface requirements may be used Possible routers include 800 1600 1700 2500 2600 routers or a combination 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 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 the router in this lab assignment before continuing Step 1 Login to the router a Connectto the router and login 158 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 5 1 5 Copyright 2003 Cisco Systems Inc Step 2 Configure the router name and configuration re
6. bout the IOS that is running in RAM b Notice that at the end of the output shows a configuration register setting of 0x2142 that we configured in Step 2 This is the problem The setting configures the router to ignore the Startup configuration file on bootup The setting will be useful to boot up in the password recovery mode 159 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 5 1 5 Copyright O 2003 Cisco Systems Inc Step 8 Change the config register to boot from NVRAM save and reload the router a Enter global configuration mode and enter the following commands Step 9 GAD gt enable GAD configure terminal GAD config config register 0x2102 GAD config exit GAD copy running config startup config Destination filename startup config Enter GAD reload Proceed with reload confirm Enter Verify the configuration register setting a Once the router has rebooted it should look to NVRAM for bootup configuration Verify this by issuing the command show version GAD show version The results will be shown You should be able to see the config register 0x2102 Upon completion of the previous steps logoff by typing exit Turn the router off 160 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 5 1 5 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 class
7. erfaces 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 584 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 5 1 5 Copyright 2003 Cisco Systems Inc Router copy startup config runnig config Destination filename running config 532 bytes copied in 0 832 secs 639 bytes sec GAD show version Cisco Internetwork Operating System Software IOS tm C2600 Software C2600 IS M Version 12 2 12 RELEASE SOFTWARE fc1 Copyright c 1986 2002 by cisco Systems Inc Compiled Wed 21 Aug 02 03 01 by pwade Image text base 0x8000808C data base 0x810CE168 ROM System Bootstrap Version 12 1 3r T2 RELEASE SOFTWARE fc1 GAD uptime is 3 minutes System returned to ROM by reload System image file is flash c2600 is mz 122 12 bin cisco 2621 MPC860 processor revision 0x600 with 60416K 5120K bytes of memory Processor board ID JAD054304U6 196842265 M860 processor part number 0 mask 49 Bridging software X 25 software Version 3 0 0 2 FastEthernet IEEE 802 3 interface s 2 Low speed serial sync async network interface s 32K bytes of non volatile configuration memory 16384K bytes of processor board System flash Read Wri
8. ess shutdown interface BRIO no ip address shutdown ip classless ip http server l H line con O0 password cisco logging synchronous login line aux O0 line vty 0 4 password cisco login end H 163 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 5 1 5 Copyright O 2003 Cisco Systems Inc GAD show version Cisco Internetwork Operating System Software IOS tm 2500 Software C2500 I L Version 12 1 18 RELEASE SOFTWARE fc1l Copyright c 1986 2002 by cisco Systems Inc Compiled Mon 02 Dec 02 23 45 by kellythw Image text base 0x03041E94 data base 0x00001000 ROM System Bootstrap Version 11 0 10c SOFTWARE BOOTLDR 3000 Bootstrap Software IGS BOOT R Version 11 0 10c RELEASE SOFTWARE fcl GAD uptime is 43 minutes System returned to ROM by reload System image file is flash c2500 i 1 121 18 bin cisco 2500 68030 processor revision N with 14336K 2048K bytes of memory Processor board ID 08026577 with hardware revision 00000001 Bridging software X 25 software Version 3 0 0 Basic Rate ISDN software Version 1 1 1 Ethernet IEEE 802 3 interface s 2 Serial network interface s 1 ISDN Basic Rate interface s 32K bytes of non volatile configuration memory 16384K bytes of processor board System flash Read ONLY GAD configure terminal Enter configuration commands
9. gister setting a Enter the following commands Router gt enable Router configure terminal Router config hostname GAD GAD config config register 0x2142 GAD config exit Step 3 Save the existing running config to the startup config a At the privileged EXEC command prompt enter GAD copy running config startup config Destination filename startup config Enter Step 4 Restart the router a At the privileged EXEC command prompt enter GAD reload Proceed with reload confirm Enter After the reload the router will respond with System Configuration Dialog Would you like to enter the initial configuration dialog yes no n Type n and press Enter Step 5 View the running configuration file a Enter show running config at the privileged EXEC mode prompt The router will display information on the running configuration file stored in RAM b Have the configuration commands from Step 2 loaded into RAM No Step 6 Reload the saved configuration a Atthe privileged EXEC command prompt enter Router copy startup config running config Destination filename running config Enter b Notice that the router name that was configured in Step 2 GAD is now displayed Why did the Startup config file not load when we reloaded the router The startup config in NVRAM was ignored Step 7 Display IOS version and other important information a Enterthe show version command at the router prompt The router will display information a
10. guration file in NVRAM and reload the router Background Preparation Setup a network as displayed in the figure Any router that meets the interface requirements may be used Possible routers include 800 1600 1700 2500 2600 routers or a combination 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 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 the router in this lab assignment before continuing Step 1 Login to the router a Connect to the router and login 580 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 5 1 5 Copyright 2003 Cisco Systems Inc Step 2 Configure the router name and configuration register setting a Enter the following commands Router gt enable Router configure terminal Router config hostname GAD GAD config config register 0x2142 GAD config exit Step 3 Save the existing running config to the startup config a At the privileged EXEC command prompt enter GAD copy running config startup config Destination filename startup config Enter Step 4 Restart the router a At the privileged EXEC command prompt enter GAD reload Proceed with re
11. hernet 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 162 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 5 1 5 Copyright 2003 Cisco Systems Inc GAD show running config Building configuration Current configuration 599 bytes version 12 1 no service single slot reload enable service timestamps debug uptime service timestamps log uptime no service password encryption hostname GAD enable secret 5 1 C5ZS ASh31M2FyWGIZLA4P2Ba c enable password cisco p subnet zero fuss aes dien e p uen ae fen nterface EthernetO no ip address shutdown interface SerialO no ip address shutdown no fair queue interface Seriall no ip addr
12. ified 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 583 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 5 1 5 Copyright 2003 Cisco Systems Inc Router Interface Summary Router Ethernet Ethernet Serial Serial Interface Model Interface 1 Interface 2 Interface 1 Interface 2 5 800 806 Ethernet 0 EO Ethernet 1 E1 1600 Ethernet 0 EO Ethernet 1 E1 Serial 0 SO Serial 1 S1 1700 FastEthernet 0 FAO FastEthernet 1 FA1 Serial 0 SO Serial 1 81 2500 Ethernet 0 EO Ethernet 1 E1 Serial 0 SO Serial 1 S1 2600 FastEthernet 0 0 FastEthernet 0 1 FA0 1 Serial 0 0 S0 0 Serial 0 1 FA0 0 80 1 In order to find out exactly how the router is configured look at the interfaces This will identify the type of router as well as how many interfaces the router has There is no way to effectively list all of the combinations of configurations for each router class What is provided are the identifiers for the possible combinations of int
13. load confirm Enter After the reload the router will respond with System Configuration Dialog Would you like to enter the initial configuration dialog yes no n Type n and press Enter Step 5 View the running configuration file a Enter show running config at the privileged EXEC mode prompt The router will display information on the running configuration file stored in RAM b Have the configuration commands from Step 2 loaded into RAM No Step 6 Reload the saved configuration a Atthe privileged EXEC command prompt enter Router copy startup config running config Destination filename running config Enter b Notice that the router name that was configured in Step 2 GAD is now displayed Why did the Startup config file not load when we reloaded the router The startup config in NVRAM was ignored Step 7 Display IOS version and other important information a Enterthe show version command at the router prompt The router will display information about the IOS that is running in RAM b Notice that at the end of the output shows a configuration register setting of 0x2142 that we configured in Step 2 This is the problem The setting configures the router to ignore the Startup configuration file on bootup The setting will be useful to boot up in the password recovery mode 581 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 5 1 5 Copyright O 2003 Cisco Systems Inc Step 8 Change the config register to bo
14. one per line End with CNTL Z GAD config config register 0x2142 GAD config exit GAD 00 44 53 SYS 5 CONFIG I Configured from console by console GAD GAD show version Cisco Internetwork Operating System Software IOS tm 2500 Software C2500 I L Version 12 1 18 RELEASE SOFTWARE fc1 Copyright c 1986 2002 by cisco Systems Inc Compiled Mon 02 Dec 02 23 45 by kellythw Image text base 0x03041E94 data base 0x00001000 ROM System Bootstrap Version 11 0 10c SOFTWARE BOOTLDR 3000 Bootstrap Software IGS BOOT R Version 11 0 10c RELEASE SOFTWARE fcl GAD uptime is 44 minutes System returned to ROM by reload System image file is flash c2500 i 1 121 18 bin cisco 2500 68030 processor revision N with 14336K 2048K bytes of memory Processor board ID 08026577 with hardware revision 00000001 Bridging software X 25 software Version 3 0 0 Basic Rate ISDN software Version 1 1 164 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 5 1 5 Copyright O 2003 Cisco Systems Inc 1 Ethernet IEEE 802 3 interface s 2 Serial network interface s 1 ISDN Basic Rate interface s 32K bytes of non volatile configuration memory 16384K bytes of processor board System flash Read ONLY Router show version Cisco Internetwork Operating System Software IOS tm 2500 Software C2500 I L Version 12 1 18 RELEASE SOFTWARE fc1
15. ot from NVRAM save and reload the router a Enter global configuration mode and enter the following commands Step 9 GAD gt enable GAD configure terminal GAD config config register 0x2102 GAD config exit GAD copy running config startup config Destination filename startup config Enter GAD reload Proceed with reload confirm Enter Verify the configuration register setting a Once the router has rebooted it should look to NVRAM for bootup configuration Verify this by issuing the command show version GAD show version The results will be shown You should be able to see the config register 0x2102 Upon completion of the previous steps logoff by typing exit Turn the router off 582 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 5 1 5 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 class 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 mod
16. te GAD show version Cisco Internetwork Operating System Software IOS tm C2600 Software C2600 IS M Version 12 2 12 RELEASE SOFTWARE fc1 Copyright c 1986 2002 by cisco Systems Inc Compiled Wed 21 Aug 02 03 01 by pwade Image text base 0x8000808C data base 0x810CE168 ROM System Bootstrap Version 12 1 3r T2 RELEASE SOFTWARE fc1 GAD uptime is 3 minutes System returned to ROM by reload System image file is flash c2600 is mz 122 12 bin cisco 2621 MPC860 processor revision 0x600 with 60416K 5120K bytes of memory Processor board ID JAD054304U6 196842265 M860 processor part number 0 mask 49 Bridging software X 25 software Version 3 0 0 2 FastEthernet IEEE 802 3 interface s 2 Low speed serial sync async network interface s 32K bytes of non volatile configuration memory 16384K bytes of processor board System flash Read Write 585 833 CCNA 2 Routers and Routing Basics v 3 1 Lab 5 1 5 Copyright O 2003 Cisco Systems Inc GAD show version Cisco Internetwork Operating System Software IOS tm C2600 Software C2600 IS M Version 12 2 12 RELEASE SOFTWARE fc1 Copyright c 1986 2002 by cisco Systems Inc Compiled Wed 21 Aug 02 03 01 by pwade Image text base 0x8000808C data base 0x810CE168 ROM System Bootstrap Version 12 1 3r T2 RELEASE SOFTWARE fc1 GAD uptime is 3 minutes System
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