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Forum Replies

  1. system says:

    hello thank you very much. you make CCNA look very easy. you talk me thank you once again

  2. Hi Shaun,

    There is a “show key chain” command but personally I never use it. The debug will help you to figure out there is an authentication problem. The quickest method to fix it is to check the key chain in the running-config, make sure you use the same keys on both routers. Also check the interface if EIGRP authentication has been enabled.

    Good luck with the exam!


  3. dmi says:


    Is there any way to hide or restrict users from viewing the KEY (other than by assigning views or privilege levels) ?



  4. Hello Dan

    The service password-encryption command will do what you need. According to Cisco:

    The actual encryption process occurs when the current configuration is written or when a password is configured. Password encryption is applied to all passwords, including authentication key passwords, the privileged command password, console and virtual terminal line access passwords, and BGP neighbor passwords. The service password-encryption command is primarily useful for keeping unauthorized individuals from viewing your password in your configuration file.

    (emphasis mine)

    I hope this has been helpful!


  5. Hi again Rene,

    Why cisco decided to use this “ip authentication mode eigrp AS_NUM md5” command for enabling eigrp authentication instead of using “ip eigrp AS_NUM authentication mode md5” ??

    In the other word what is the wisdom of using “ip authentication mode eigrp AS_NUM md5” command instead of the “ip authentication eigrp AS_NUM mode md5” command where it seems more clearly ??

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