2600 password recovery --- recovery

Posted on 2005-04-27
Last Modified: 2010-04-10
So here's an easy one I can't seem to remember.

Confreg 0x2142 to clear?

Confreg 0x2102 goes back so it will hold settings?

Right?  Or do I have it reversed???

I can't get my configurations to keep.  Either it goes back to:

Enter Autoconfiguration mode?  [Yes/No]

Question by:Hollmer
    LVL 57

    Expert Comment

    by:Pete Long
    Type confreg 0x2142 at the rommon 1> prompt to boot from Flash without loading the configuration.

    Type reset at the rommon 2> prompt

    Type no after each setup question or press Ctrl-C to skip the initial setup procedure.

    Type enable at the Router> prompt.

    You are taken to the enable mode, and the Router# prompt appears.

    Important: Type configure memory or copy startup-config running-config to copy the nonvolatile RAM (NVRAM) into memory.

    DO NOT!!! type configure terminal .

    Type write terminal or show running-config .

    The show running-config and write terminal commands show the configuration of the router. In this configuration you see under all the interfaces the shutdown command, which means all interfaces are currently shutdown. Also, you can see the passwords (enable password, enable secret, vty, console passwords, and so on) either in encrypted or unencrypted format. The unencrypted passwords can be re-used, the encrypted ones will have to be changed with a new one.

    Type configure terminal and make the changes.

    The prompt is now hostname(config)#.

    Type enable secret <password> to change the enable secret password, for example.

    Issue the no shutdown command on every interface that is used.

    If you issue a show ip interface brief command, every interface that you want to use should be "up up".

    Type config-register 0x2102, or the value you recorded in step 2.

    Press Ctrl-Z or end to leave the configuration mode.

    The prompt is now changed to hostname#.

    Type write memory or copy running-config startup-config to commit the changes.
    LVL 1

    Author Comment

    I know.  I have that article bookmarked.  I just didn't know if they were saying that 2102 resets it or if that breaks you out of your config.  So..... 2102 returns you to normal operating mode?  Right?


    Accepted Solution

    '0x2142' means bypass the running-configuration in the NVRAM, and instead of that loading the default config, it will not break your config.

    yes, hollmer, you are right. After changing your password, register-'0x2102' will bring your config up to running.
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