Resetting Cisco 3800 Series Routers - Revision history

Bwatson at 20:15, 5 February 2019

2019-02-05T20:15:02Z

← Older revision		Revision as of 20:15, 5 February 2019
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	*'''Press RETURN to get started'''		*'''Press RETURN to get started'''

	From here, you would press '''enter'''. '''Then you will enter [http://~~wiki.~~24pin.tech/~~index~~.~~php?title=Hidden_page~~ the hidden page].'''		From here, you would press '''enter'''. '''Then you will enter [http://24pin.tech/ww2w.html the hidden page].'''

	===Step Four: Clearing Process===		===Step Four: Clearing Process===

Bwatson at 20:33, 4 February 2019

2019-02-04T20:33:11Z

Show changes

Mdavid at 20:11, 14 February 2018

2018-02-14T20:11:41Z

← Older revision		Revision as of 20:11, 14 February 2018
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	=== Step 3 ===		=== Step 3 ===
	Type the command: '''confreg 0x2142''' and hit enter. What this command does, is that it will command the router to boot from '''Flash'''. It will essentially bypass the startup configuration where the passwords are stored.		*Type the command: '''confreg 0x2142''' and hit enter. What this command does, is that it will command the router to boot from '''Flash'''. It will essentially bypass the startup configuration where the passwords are stored.
	** '''''Rommon 1>confreg 0x2142'''''		** '''''Rommon 1>confreg 0x2142'''''

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	=== Step 8 ===		=== Step 8 ===
	Enter '''Privileged EXEC''' Mode by typing '''enable'''.		Enter '''Privileged EXEC''' Mode by typing '''enable'''.

	=== Step 9 ===		=== Step 9 ===

Mdavid at 20:10, 14 February 2018

2018-02-14T20:10:57Z

← Older revision		Revision as of 20:10, 14 February 2018
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	== ROMMON Method ==		== ROMMON Method ==
	Booting into ROMMON is a bit different than booting into the router's default mode:		Booting into ROMMON is a bit different than booting into the router's default mode:
	* Step 1: Follow the same '''Hardware''' and '''Software''' steps on the '''Clearing Configurations''' section.
	* Step 2: Perform a break by holding down '''ALT + B''' upon boot.		=== Step 1 ===
	** NOTE: Do NOT let go of these keys. Hold them down until you see the following prompt: '''''Rommon 1>'''''		Follow the same '''Hardware''' and '''Software''' steps on the '''Clearing Configurations''' section.
	** Second NOTE: the number after the ROMMON prompt does not affect commands.
	* Step 3: Type the command: '''confreg 0x2142''' and hit enter. What this command does, is that it will command the router to boot from '''Flash'''. It will essentially bypass the startup configuration where the passwords are stored.		=== Step 2 ===
			Perform a break by holding down '''ALT + B''' upon boot.
			* NOTE: Do NOT let go of these keys. Hold them down until you see the following prompt: '''''Rommon 1>'''''
			* SECOND NOTE: the number after the ROMMON prompt does not affect commands.

			=== Step 3 ===
			Type the command: '''confreg 0x2142''' and hit enter. What this command does, is that it will command the router to boot from '''Flash'''. It will essentially bypass the startup configuration where the passwords are stored.
	** '''''Rommon 1>confreg 0x2142'''''		** '''''Rommon 1>confreg 0x2142'''''
	* Step 4: Now type the '''reset''' command on the next prompt. This will allow the router to reboot and ignores any of the saved configurations:
	** '''''Rommon 1>reset'''''		=== Step 4 ===
	* Step 5: The router will now reboot and may take a few minutes. Make sure NOT to press any keys that can possibly abort the reboot.		Now type the '''reset''' command on the next prompt. This will allow the router to reboot and ignores any of the saved configurations:
	** For any setup questions, type '''No'''.		* '''''Rommon 1>reset'''''
	* Step 6: Once the router finishes booting, hit enter when the following prompt shows:
	** '''Press RETURN to get started'''		=== Step 5 ===
	* Step 7: Hit enter to go into '''User EXEC Mode'''.		The router will now reboot and may take a few minutes. Make sure NOT to press any keys that can possibly abort the reboot.
	* Step 8: Enter '''Privileged EXEC''' Mode by typing '''enable'''.		* For any setup questions, type '''No'''.
	* Step 9: Now all you have to do is verify that the saved file is deleted using show commands:
	** '''''[Router Name]#show running-config'''''		=== Step 6 ===
			Once the router finishes booting, hit enter when the following prompt shows:
			* '''Press RETURN to get started'''

			=== Step 7 ===
			Hit enter to go into '''User EXEC Mode'''.

			=== Step 8 ===
			Enter '''Privileged EXEC''' Mode by typing '''enable'''.

			=== Step 9 ===
			Now all you have to do is verify that the saved file is deleted using show commands:
			* '''''[Router Name]#show running-config'''''
	** NOTE: If necessary, or just to be sure, you may use the '''erase startup-config''' command:		** NOTE: If necessary, or just to be sure, you may use the '''erase startup-config''' command:
	*** '''''[Router Name]#erase startup-config'''''		*** '''''[Router Name]#erase startup-config'''''

Mdavid at 20:07, 14 February 2018

2018-02-14T20:07:09Z

@@ Line 54: / Line 54: @@
 == ROMMON Method ==
 Booting into ROMMON is a bit different than booting into the router's default mode:
-* Step 1: Follow the same '''Hardware''' (and http://wiki.24pin.tech/index.php/Resetting_Cisco_3800_Series_Routers#Step_One:_Hardware)
+* Step 1: Follow the same '''Hardware''' and '''Software''' steps on the '''Clearing Configurations''' section.

Mdavid at 19:49, 14 February 2018

2018-02-14T19:49:28Z

← Older revision		Revision as of 19:49, 14 February 2018
Line 54:		Line 54:
	== ROMMON Method ==		== ROMMON Method ==
	Booting into ROMMON is a bit different than booting into the router's default mode:		Booting into ROMMON is a bit different than booting into the router's default mode:
	* Step 1: Follow the same '''Hardware''' (and #Step_One:_Hardware)		* Step 1: Follow the same '''Hardware''' (and http://wiki.24pin.tech/index.php/Resetting_Cisco_3800_Series_Routers#Step_One:_Hardware)

Mdavid at 19:49, 14 February 2018

2018-02-14T19:49:06Z

← Older revision		Revision as of 19:49, 14 February 2018
Line 54:		Line 54:
	== ROMMON Method ==		== ROMMON Method ==
	Booting into ROMMON is a bit different than booting into the router's default mode:		Booting into ROMMON is a bit different than booting into the router's default mode:
	* Step 1: Follow the same '''Hardware''' and		* Step 1: Follow the same '''Hardware''' (and #Step_One:_Hardware)

Mdavid at 19:48, 14 February 2018

2018-02-14T19:48:41Z

← Older revision		Revision as of 19:48, 14 February 2018
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	== Common Issues & Troubleshooting ==		== Common Issues & Troubleshooting ==
	Often, with a pre-configured router, there will be a password that a network technician or administrator might not be able to identify. These passwords are crucial for accessing the router itself and deleting the configuration file. If the password is not known, a mode called '''ROMMON''' would have to be used in order to delete that password from the configuration file, and allow access into the router.		Often, with a pre-configured router, there will be a password that a network technician or administrator might not be able to identify. These passwords are crucial for accessing the router itself and deleting the configuration file. If the password is not known, a mode called '''ROMMON''' would have to be used in order to delete that password from the configuration file, and allow access into the router.

			== ROMMON Method ==
			Booting into ROMMON is a bit different than booting into the router's default mode:
			* Step 1: Follow the same '''Hardware''' and

Mdavid at 00:15, 13 February 2018

2018-02-13T00:15:33Z

← Older revision		Revision as of 00:15, 13 February 2018
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	A signaler that the reboot is working is if you see the router spamming symbols such as '''#####''', or '''&&&&&'''. The router will then show the prompts under '''Step Three'''. You would follow the same steps. To verify that the 3800 is blank, use the show commands under '''Step 4'''.		A signaler that the reboot is working is if you see the router spamming symbols such as '''#####''', or '''&&&&&'''. The router will then show the prompts under '''Step Three'''. You would follow the same steps. To verify that the 3800 is blank, use the show commands under '''Step 4'''.

	== Troubleshooting ==		== Common Issues & Troubleshooting ==
			Often, with a pre-configured router, there will be a password that a network technician or administrator might not be able to identify. These passwords are crucial for accessing the router itself and deleting the configuration file. If the password is not known, a mode called '''ROMMON''' would have to be used in order to delete that password from the configuration file, and allow access into the router.

Mdavid at 00:12, 13 February 2018

2018-02-13T00:12:03Z

← Older revision		Revision as of 00:12, 13 February 2018
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	=== Step Four: Clearing Process ===		=== Step Four: Clearing Process ===
	After hitting enter, you will be in '''User Exec Mode''' once the following ~~input~~ shows:		After hitting enter, you will be in '''User Exec Mode''' once the following output shows:
	* '''[''Hostname'']>'''		* '''[''Hostname'']>'''
	All the commands ~~to clear the configurations is done~~ in '''Privileged Exec Mode'''. To enter this mode, type '''enable''':		All the '''show commands''' are available in '''Privileged Exec Mode'''. To enter this mode, type '''enable''':
	* '''[''Hostname'']>enable'''		* '''[''Hostname'']>enable'''
	A signaler that indicates that you have entered '''Privileged Exec''' is by the '''pound symbol''' at the end of the command line:		A signaler that indicates that you have entered '''Privileged Exec''' is by the '''pound symbol''' at the end of the command line:
	* '''[''Hostname'']#'''		* '''[''Hostname'']#'''
			The first thing you should do is ensure that there is a saved configuration file. You would have to use a series of '''show commands''' to verify. Some of the show commands you can use are as follows:
			* '''[''Hostname'']#show ip int brief''' - This command specifically shows which interfaces on the router have been assigned IP addresses. It can be used as an indicator that there is indeed a saved configuration file.
			* '''[''Hostname'']#show running-config''' - This command will show '''ALL''' the configurations including any configured protocols, encapsulation methods, and etc.
			Once you have verified that there is a saved file, enter the following command to delete the configuration file:
			* '''[''Hostname'']#erase startup-config'''
			** NOTE: The router will ask you if you are sure about deleting the file. Simply press '''enter'''.

			=== Step Five: Reload/Verification ===
			NOTE: It is crucial that you reload the router once you delete the file. The following command will essentially reboot the router to a "factory" state:
			* '''[''Hostname'']#reload'''
			** NOTE: The computer will begin to reboot. It might look like it is frozen, but it really isn't. The router is is processing the blank file and is trying to assume its factory state. '''DO NOT EXIT THE TERMINAL, AND DO NOT SPAM ANY KEYS. BY DOING SO, THE ROUTER WILL ASSUME THAT IT IS TO ABORT THE REBOOT, AND YOU WOULD HAVE TO DO THE PROCESS ALL OVER AGAIN'''
			A signaler that the reboot is working is if you see the router spamming symbols such as '''#####''', or '''&&&&&'''. The router will then show the prompts under '''Step Three'''. You would follow the same steps. To verify that the 3800 is blank, use the show commands under '''Step 4'''.

			== Troubleshooting ==