Password Recovery for Cisco Router 1841 - Revision history

Jasonredlin at 18:38, 9 December 2010

2010-12-09T18:38:28Z

← Older revision		Revision as of 18:38, 9 December 2010
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

Jasonredlin at 17:35, 9 December 2010

2010-12-09T17:35:39Z

← Older revision		Revision as of 17:35, 9 December 2010
Line 12:		Line 12:
	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 ~~but ignore the startup-config~~.		4. Enter '''reset''' at the ''rommon 2>'' prompt to reboot the router.

	rommon 2 > reset		rommon 2 > reset

Jasonredlin at 17:09, 9 December 2010

2010-12-09T17:09:37Z

← Older revision		Revision as of 17:09, 9 December 2010
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#reload		Router#reload

Jasonredlin at 17:09, 9 December 2010

2010-12-09T17:09:02Z

← Older revision		Revision as of 17:09, 9 December 2010
Line 76:		Line 76:
	15. Enter '''reload''' to restart the router using the 0x2102 register.		15. Enter '''reload''' to restart the router using the 0x2102 register.

	Router>reload		Router#reload

	Your passwords have now been reset.		Your passwords have now been reset.

Jasonredlin at 17:05, 9 December 2010

2010-12-09T17:05:18Z

← Older revision		Revision as of 17:05, 9 December 2010
Line 49:		Line 49:
	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.		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(config)#enable secret < password >		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		Router(config)#^z

Jasonredlin at 16:59, 9 December 2010

2010-12-09T16:59:50Z

← Older revision		Revision as of 16:59, 9 December 2010
Line 4:		Line 4:
	Connect to the console of the router.		Connect to the console of the router.

	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.		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.

	~~Cycle power to the router and within 60 seconds enter the break sequence to enter ROMMON. [[Standard Break Key Combinations]]~~		Router>show version
			<output omitted>
			Configuration register is 0x2102

	~~Enter '''confreg 0x2142''' at~~ the ~~''rommon 1>'' prompt~~ to ~~boot from flash~~.		2. Cycle power to the router and within 60 seconds enter the break sequence to enter ROMMON. [[Standard Break Key Combinations]]

	Enter '''~~reset~~''' at the ''rommon 2>'' prompt to ~~reboot the router but ignore the startup-config~~.		3. Enter '''confreg 0x2142''' at the ''rommon 1>'' prompt to boot from flash.

	~~Enter '''no''' after the setup questions~~ or ~~press Ctrl-C~~ to ~~skip the initial setup.~~		rommon 1 > confreg 0x2142
			You must reset or power cycle for new config to take effect

	Enter '''~~Enable~~''' to ~~enter enable mode~~.		4. Enter '''reset''' at the ''rommon 2>'' prompt to reboot the router but ignore the startup-config.

	~~To recover your password, enter '''configure memory''' or '''copy startup-config running-config'''.~~		rommon 2 > reset

	~~Enter '''show running-config''' to verify that the running configuration has been changed~~.		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>

	Enter '''configure terminal'''		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

	To change your secret password enter '''enable secret <password>''' at the ''hostname(config)# prompt''.		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(config)#enable secret < 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.

	~~Issue the no shutdown command on each of the interfaces you are using.~~		Router(config)#config-register 0x2102
			Router(config)#^Z

	Enter '''~~config-register 0x2102''' and press '''Ctrl-z~~''' to ~~save and leave privilege EXEC mode~~.		15. Enter '''reload''' to restart the router using the 0x2102 register.

	~~Enter '''write memory''' or '''copy running-config startup-config''' to save your changes to the startup configuration.~~		Router>reload

	~~Enter '''reload''' to restart the router using the 0x2102 register~~.		Your passwords have now been reset.

Jasonredlin at 16:40, 9 December 2010

2010-12-09T16:40:44Z

← Older revision		Revision as of 16:40, 9 December 2010
Line 6:		Line 6:
	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.		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.

	Cycle power to the router and within 60 seconds enter the break sequence to enter ROMMON. ~~The break sequence for HyperTerminal is Ctrl-~~Break ~~and for Teraterm it is Alt-b.~~		Cycle power to the router and within 60 seconds enter the break sequence to enter ROMMON. [[Standard Break Key Combinations]]

	Enter '''confreg 0x2142''' at the ''rommon 1>'' prompt to boot from flash.		Enter '''confreg 0x2142''' at the ''rommon 1>'' prompt to boot from flash.

Jasonredlin at 13:26, 9 December 2010

2010-12-09T13:26:51Z

← Older revision		Revision as of 13:26, 9 December 2010
Line 31:		Line 31:

	Enter '''reload''' to restart the router using the 0x2102 register.		Enter '''reload''' to restart the router using the 0x2102 register.




			*[[Password Recovery and Device Reset Procedures]]

Jasonredlin: Created page with '== Password Recovery for Cisco Router 1841== Recovering a Cisco 1841 Router Password Connect to the console of the router. If you can access the router use the show version com…'

2010-12-08T20:46:14Z

Created page with '== Password Recovery for Cisco Router 1841== Recovering a Cisco 1841 Router Password Connect to the console of the router. If you can access the router use the show version com…'

New page

== Password Recovery for Cisco Router 1841==

Recovering a Cisco 1841 Router Password
Connect to the console of the router.

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.

Cycle power to the router and within 60 seconds enter the break sequence to enter ROMMON. The break sequence for HyperTerminal is Ctrl-Break and for Teraterm it is Alt-b.

Enter '''confreg 0x2142''' at the ''rommon 1>'' prompt to boot from flash.

Enter '''reset''' at the ''rommon 2>'' prompt to reboot the router but ignore the startup-config.

Enter '''no''' after the setup questions or press Ctrl-C to skip the initial setup.

Enter '''Enable''' to enter enable mode.

To recover your password, enter '''configure memory''' or '''copy startup-config running-config'''.

Enter '''show running-config''' to verify that the running configuration has been changed.

Enter '''configure terminal'''

To change your secret password enter '''enable secret <password>''' at the ''hostname(config)# prompt''.

Issue the no shutdown command on each of the interfaces you are using.

Enter '''config-register 0x2102''' and press '''Ctrl-z''' to save and leave privilege EXEC mode.

Enter '''write memory''' or '''copy running-config startup-config''' to save your changes to the startup configuration.

Enter '''reload''' to restart the router using the 0x2102 register.