Password Recovery Instructions: Difference between revisions

From ITCwiki
Jump to navigation Jump to search
 
(restore old content)
 
Line 1: Line 1:
#REDIRECT [[Multilayer Switching]]
________________________________________
 
 
'''''Password recovery of the Cisco Routers'''''
 
[[File:CiscoRouters.jpg]]
 
In order for one to understand these instructions you have to have prior knowledge of what a router is and its basic function.
 
'''1'''.Connect a computer to the router’s Console port using the Console cable that came with your router (it is usually flat and light blue).
Use these Hyper terminal settings:
 
* 9600 baud rate
* No parity
* 8 data bits
* 1 stop bit
* No flow control
'''2'''. Turn the router off using the power switch and turn it back on.
 
'''3'''. Once text starts popping up on the screen, send the break command CTRL + B or CTRL +BREAK (sometimes it is CTRL +X). This will abort the boot and present you with a rommon 1> prompt
 
'''4'''. From the new prompt you need to change the configuration register using the following command: confreg 0×2142
 
'''5'''. If you are using an older model of router you may need to enter o/r 0×2142
 
'''6'''. Now you need to recycle the router with the reset command.
 
'''7'''. If you used the o/r command then reset the router with the I command
 
'''8'''. Once the router finishes restarting you will find that there are no passwords to deal with, so you can enter enabled.
 
'''9'''. Now, go into configuration mode with the config t command
 
'''10''' .Once there enter the new password with the enable secret password
 
'''11'''. Now set the configuration register back to normal with this command: confreg 0×2102
 
 
''' '''Password recovery on a Cisco 2950 switch''''''
 
'''1'''. Unplug the power cable
 
'''2'''. Hold down the mode button while replugging the power cable
 
'''3'''. Type flash_init over the console
 
'''4'''. Type load_helper
 
'''5'''. Type Dir flash :
make sure to type the semi-colons
 
'''6'''. Type rename flash:config.txt flash:config.old
the password is contained in the config.txt file
 
'''7'''. Type boot
this reboots the system
 
'''8'''. Type n to skip the initial setup configuration
 
'''9'''. Type enable
this takes you to the enable mode
 
'''10'''. Type rename flash:config.old flash:config.txt
 
'''11'''. Save config.txt to system
 
#copy flash:config.txt system:running-config
 
'''12'''. Enter config mode and change the password
 
# config t
 
# no enable secret
 
this applies only if the enable secret password was created
 
'''13'''. Finally, write the changes to memory
 
# write memory

Latest revision as of 19:17, 24 October 2010

________________________________________


Password recovery of the Cisco Routers

CiscoRouters.jpg

In order for one to understand these instructions you have to have prior knowledge of what a router is and its basic function. 

1.Connect a computer to the router’s Console port using the Console cable that came with your router (it is usually flat and light blue). Use these Hyper terminal settings:

  • 9600 baud rate
  • No parity
  • 8 data bits
  • 1 stop bit
  • No flow control

2. Turn the router off using the power switch and turn it back on.

3. Once text starts popping up on the screen, send the break command CTRL + B or CTRL +BREAK (sometimes it is CTRL +X). This will abort the boot and present you with a rommon 1> prompt

4. From the new prompt you need to change the configuration register using the following command: confreg 0×2142

5. If you are using an older model of router you may need to enter o/r 0×2142

6. Now you need to recycle the router with the reset command.

7. If you used the o/r command then reset the router with the I command

8. Once the router finishes restarting you will find that there are no passwords to deal with, so you can enter enabled.

9. Now, go into configuration mode with the config t command

10 .Once there enter the new password with the enable secret password

11. Now set the configuration register back to normal with this command: confreg 0×2102


' Password recovery on a Cisco 2950 switch'

1. Unplug the power cable

2. Hold down the mode button while replugging the power cable

3. Type flash_init over the console

4. Type load_helper

5. Type Dir flash : make sure to type the semi-colons

6. Type rename flash:config.txt flash:config.old the password is contained in the config.txt file

7. Type boot this reboots the system

8. Type n to skip the initial setup configuration

9. Type enable this takes you to the enable mode

10. Type rename flash:config.old flash:config.txt

11. Save config.txt to system

  1. copy flash:config.txt system:running-config

12. Enter config mode and change the password

  1. config t
  1. no enable secret

this applies only if the enable secret password was created

13. Finally, write the changes to memory

  1. write memory