Cisco 1921 Router Password Recovery

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  • emma lee

    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 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
    And of course: save your configuration
    Don’t forget to rate useful posts ;)
    Sent from Cisco Technical Support iPad App

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