Step-by-Step Procedure
Follow these steps in order to recover
your password:
1. Attach a terminal or PC with terminal
emulation to the console port of the router.
Use these terminal settings:
- 9600 baud rate
- No parity
- 8 data bits
- 1 stop bit
- No flow control
2. Access the router through your terminal program, type
show version at the prompt, and record the configuration register setting.
Note: The configuration register is usually
set to 0x2102 or 0x102. If you can no longer access the router (because of a
lost login or TACACS password), you can safely assume that your configuration
register is set to 0x2102.
3. Use the power switch in order to turn
off the router, and then turn the router back on.
Important Notes:
¤ In order to simulate this step on a Cisco 6400, pull out and then
plug in the Node Route Processor (NRP) or Node Switch Processor (NSP) card.
¤ In order to simulate this step on a Cisco 6x00 with NI-2, pull out
and then plug in the NI-2 card.
4. Press Break on the
keyboard within 60 seconds of boot (power up) in order to put the router into ROMMON.
If the break sequence does not work,
refer to Standard Break Key Sequence Combinations During Password Recovery for
other key combinations on Cisco's site.
5. Type confreg 0x2142 at the rommon 1> prompt in order to boot from Flash. This step bypasses the startup
configuration where the passwords are stored.
6. Type reset at the rommon> prompt. The router reboots, but ignores the saved configuration.
7. Type enable at the Router> prompt.
8. Type no after each setup
question, or press Ctrl-C in order to skip the initial setup
procedure.
You are in enable mode and should see
the Router# prompt.
9. Type configure memory or
copy startup-config running-config in order to copy the nonvolatile RAM
(NVRAM) into memory.
Important: Do not type
copy running-config startup-config or write. These commands erase
your startup configuration.
10. Type show
running-config.
The show running-config command
shows the configuration of the router. In this configuration, the shutdown
command appears under all interfaces, which indicates all interfaces are
currently shut down. In addition, the passwords (enable password, enable
secret, vty, console passwords) are in either an encrypted or unencrypted
format. You can reuse unencrypted passwords. You must change encrypted passwords
to a new password.
11. Type configure terminal.
The hostname(config)# prompt appears.
12. Type enable secret <password>
in order to change the enable secret password. For example:
hostname(config)#enable secret cisco
13. Issue the no shutdown command
on every interface that you use.
If you issue a show ip interface brief
command in privilege EXEC mode, every interface that you want to use should
display up up. For example:
Router#show ip interface brief
14. Type config-register <configuration_register_setting>.
Where configuration_register_setting is either the value you recorded in
step 2 or 0x2102 . For example:
hostname(config)#config-register 0x2102
15. Press Ctrl-z or end in
order to leave the configuration mode.
The hostname# prompt appears.
Type write memory or copy running-config startup-config in
order to save changes
Hope this piece satisfies your techy, adventurous expedition !
Thank you for coming by, see you again very soon.
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