This tutorial will help you lock down your Cisco gear’s configuration access.This feature comes in very handy for making day-to-day configuration changes.The “Configuration Lock” feature also known as “Exclusive Configuration Change Access ” allows you to have exclusive change access to the Cisco IOS running configuration, preventing multiple users from making concurrent configuration changes to Cisco devices.

In addition, this tutorial will also demonstrate use of “Access Session Locking feature” which takes you a step further in restricting access to device while a configuration change is being made.Together, these features help your configurations to be less error-prone.

The “Access Session Locking feature” extends the “Configuration Lock feature” such that show and debug commands entered by the user holding the configuration lock always have execution priority; show and debug commands entered by other users are only allowed to run after the processes initiated by the configuration lock owner have finished.

The Configuration Lock feature can be set to work in either of following two modes:

  • Auto Mode :This mode locks the  Cisco IOS configuration mode whenever anyone uses the configure terminal command to make changes.
  • Manual Mode :This mode sets to lock the Cisco IOS configuration mode only when the configure terminal lock command is issued.


Enjoy !

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6 Responses to “GNS3 : How to lockdown Cisco Router’s Configuration Access”

  1. neos2k1 says:


  2. admin says:

    You are welcome!

  3. Mark says:

    What would be nice is if there was a way that you could lock changes to a device during a specific time of day. This would allow for a lockdown outside of a Change window.

  4. Ashish says:

    Nice Works Admin, Thanks
    Can u plz tell me how can i add PC in my topology .

  5. Hector Jurasek says:

    Howdy cheers for this cool post. It is mega refreshing.

  6. Website says:

    Excellent blog you have here but I was wondering if you knew of any community forums that cover the same topics talked about in this article? I’d really love to be a part of group where I can get suggestions from other knowledgeable individuals that share the same interest. If you have any recommendations, please let me know. Cheers!

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