Password Recovery for Cisco Router 1841: Difference between revisions
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2. Cycle power to the router and within 60 seconds enter the break sequence to enter ROMMON. [[Standard Break Key Combinations]] | 2. Cycle power to the router and within 60 seconds enter the break sequence to enter ROMMON. [[Standard Break Key Combinations]] | ||
3. Enter '''confreg 0x2142''' at the ''rommon 1>'' prompt to boot from flash. | 3. Enter '''confreg 0x2142''' at the ''rommon 1>'' prompt to boot from flash. This command will cause the router to skip the startup configuration on the next reset. | ||
rommon 1 > confreg 0x2142 | rommon 1 > confreg 0x2142 | ||
You must reset or power cycle for new config to take effect | You must reset or power cycle for new config to take effect | ||
4. Enter '''reset''' at the ''rommon 2>'' prompt to reboot the router | 4. Enter '''reset''' at the ''rommon 2>'' prompt to reboot the router. | ||
rommon 2 > reset | rommon 2 > reset | ||
| Line 43: | Line 43: | ||
8. Enter '''show running-config''' to verify that the running configuration has been changed. | 8. Enter '''show running-config''' to verify that the running configuration has been changed. | ||
9. Enter '''configure terminal''' | 9. Enter '''configure terminal'''. | ||
Router#configure termial | Router#configure termial | ||
| Line 74: | Line 74: | ||
Router(config)#^Z | Router(config)#^Z | ||
15. Enter '''reload''' to restart the router using the 0x2102 register. | 15. Enter '''reload''' to restart the router using the 0x2102 configuration register. | ||
Router | Router#reload | ||
Your passwords have now been reset. | Your passwords have now been reset. | ||
Latest revision as of 18:38, 9 December 2010
Password Recovery for Cisco Router 1841
Recovering a Cisco 1841 Router Password Connect to the console of the router.
1. If you can access the router use the show version command. The last line of the output should tell you the version that the configuration register is set to. If you can’t access the router because of a lost login or TACACS password then your configuration register is set to 0x2102.
Router>show version <output omitted> Configuration register is 0x2102
2. Cycle power to the router and within 60 seconds enter the break sequence to enter ROMMON. Standard Break Key Combinations
3. Enter confreg 0x2142 at the rommon 1> prompt to boot from flash. This command will cause the router to skip the startup configuration on the next reset.
rommon 1 > confreg 0x2142 You must reset or power cycle for new config to take effect
4. Enter reset at the rommon 2> prompt to reboot the router.
rommon 2 > reset
System Bootstrap, Version 11.3(2)XA4, RELEASE SOFTWARE (fc1) Copyright (c) 1999 by cisco Systems, Inc. TAC:Home:SW:IOS:Specials for info C2600 platform with 32768 Kbytes of main memory <output Omitted> router>
5. Enter no after the setup questions or press Ctrl-C to skip the initial setup.
Would you like to enter the initial configuration dialog? [yes/no]: n
6. Enter Enable to enter enable mode.
Router>enable Router#
7. To recover your password, enter configure memory or copy startup-config running-config.
Router#copy startup-config running-config
8. Enter show running-config to verify that the running configuration has been changed.
9. Enter configure terminal.
Router#configure termial
10. To change your secret password enter enable secret <password> at the hostname(config)# prompt. Now is the time to reset any other passwords on the router as well.
Router# conf t Router(config)#enable secret <new_secret_password> Router(config)#enable password <new_enable_password> Router(config)#line vty 0 15 Router(config-line)#password <new_vty_password> Router(config-line)#login Router(config-line)#line con 0 Router(config-line)#password <new_console_password> Router(config)#^z
11. Issue the no shutdown command on each of the interfaces you are using.
12. Enter write memory or copy running-config startup-config to save your changes to the startup configuration.
Router#copy running-config startup-config
13. Return to global configuration mode by entering configure termial.
Router#configure terminal
14. Enter config-register 0x2102 and press Ctrl-z to save and leave privilege EXEC mode.
Router(config)#config-register 0x2102 Router(config)#^Z
15. Enter reload to restart the router using the 0x2102 configuration register.
Router#reload
Your passwords have now been reset.