How to Reset Password on Cisco Router

Cisco Guide

When you trying to configure a Cisco Router, you have a problem to login because the password is blocking you from enable mode. Actually recovering the password for most Cisco device can be solve via console port.

follow the instruction below to reset the password:


Note: you have to Prepare Cisco Router, Computer/ laptop with port COM1 provide, Blue Serial cable

1. Connect a terminal or a computer running terminal emulation software to the console port of the Cisco device.

Set your terminal to:
9600 bps
8 data bits
no parity
1 stop bit (Some Cisco devices, such as the AccessPro Card use one stop bit for another device usually using 2 stop bits).
No flow control

2. Check if you can access the router, type show version command and record the configuration register setting.

Note : The configuration register is usually set to 0×2102 or 0×102. If you can not access the router that s mean your configuration set 0×2102.

3. Turn off the router, and then turn the router back on.

4. Press Break on the terminal keyboard within 60 seconds of power up in order to put the router into ROMmon.

5. At the prompt, type o, press ENTER, and record the current value of the configuration register (usually 0×2102 or 0×102).

>o

!— Shows the configuration register option settings.

Configuration register = 0×2102 at last boot
Bit# Configuration register option settings:
15 Diagnostic mode disabled

!— Output supressed.

6. Type o/r 0×2142, and press ENTER at the > prompt in order to boot from Flash and bypass the configuration file.

7. Type i at the > prompt, and press ENTER.

The router reboots, but ignores the saved configuration.

8. Type no after each setup question, or press CTRL + C in order to skip the initial setup procedure.

9. Type enable at the Router> prompt.

Once the Router# prompt appears, you are in enable mode.

10. Type configure memory or copy startup-config running-config in order to copy the NVRAM into memory.

Important : Do not type copy running-config startup-config or write memory. These commands erase your startup configuration

11. Type write terminal or show running-config.

The show running-config and write terminal commands show the configuration of the router. In this configuration, the shutdown command appears under each interface, which means all interfaces are currently shutdown. Also, the passwords display either encrypted or unencrypted.

12. Type configure terminal, and make the changes.

The hostname(config)# prompt appears.

13. Type config-register 0×2102 (or use the value you recorded in step 4).

This step causes the router to load the Cisco IOS software from the Flash with the configuration from NVRAM at the next reload.

14. Press CTRL + Z in order to leave the configuration mode.

The hostname# prompt appears.

15. Type write memory or copy running-config startup-config in order to commit the changes.

16. Type Reload in order to restart the router and force the Cisco IOS software to boot from the Flash.

Now you can configure your Cisco Router, type show ip interface brief and Issue the no shutdown command on every interface that is used.
If you done with configuration Type write memory or copy running-config startup-config in order to commit the changes.


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