Cisco 1921 Router Password Recovery The information in this document was created from the devices in a specific lab environment. All of the devices used in this document started with a cleared (default) configuration. If your network is live, make sure that you understand the potential impact of any command.

1. Cisco 1921 Router Password Recovery
Cisco 1921 Router Password Recovery
After resetting the Cisco 1921 Router, just can not login using default username "cisco"
and password "cisco", how to recovery the password of Cisco 1921, below is the details:
The information in this document was created from the devices in a specific lab
environment. All of the devices used in this document started with a cleared (default)
configuration. If your network is live, make sure that you understand the potential impact
of any command.
Some devices are configured with onetime password. If you log on with these credentials
and save the configuration, the default password is erased. If you don't have set a new
password, you'll end up with an inaccessible box. This avoids production devices with the
default manufacture password and being exposed.
You need to do a password recovery procedure.
1) connect via console to the device
2)power on the device
3)hit ctrl+break until you are in rommon mode
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.
Type reset at the rommon 2> prompt.
The router reboots, but ignores the saved configuration.
Type no after each setup question, or press Ctrl-C in order to skip the initial setup
procedure.
Type enable at the Router> prompt.
You are in enable mode and should see the Router# prompt.
As it's a new router without previous configuration it's not really required to restore the
previous saved configuration. But if you would do: copy start run
Warning: Do not enter copy running-config startup-config or write. These commands
erase your startup configuration.
Type configure terminal.
The hostname(config)# prompt appears.
Type enable secret <password> in order to change the enable secret password. For
example:
hostname(config)#enable secret YourPassword
Restore the previous conf-reg value:
hostname(config)#config-register 0x2102
If you did a copy start run, you must also configure a new user:
Username youruser secret yourpassword
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2. And of course: save your configuration
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