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How to access an EXOS switch using a one-time failsafe password

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TitleHow to access an EXOS switch using a one-time failsafe password
Objective
Access an EXOS switch with a lost password using a generated one-time failsafe password.
Environment
EXOS 16.2+ and 21.1+
Procedure
  • Connect to the switch via the console port
  • At the login prompt, enter "ONE TIME FAILSAFE". The switch will display a challenge that is used to generate the one-time failsafe password.
  • login: ONE TIME FAILSAFE
    
    EXOS version: 21.1.1.4
    Serial Num : 1234A-56789
    System MAC : 00:04:96:00:00:00
    Challenge  : Ajsz1tPkzaZHrrJ6oC46KXqtC2s47W9Id4fisAhvtnWisaUtnWkZiwQKcR2robTwt
                 9ya2CyCUSycsSp4eFJmV5t88ENI2zMNPYH7keS9z*%p3*HG5ytJddzGhWhTuYvNix
                 0ItgdmLTDRVUHiTg%dTjZ1jVpAfpaabj5rBjGcXEA4/5ikbt*9W/QEiRfVeg8xm*s
                 fVA8%NQcZnZnMRY5Sohp4B0RpPhzTkHcZ2yepZY/r+1RG9CtUNuUJCYqhWgr*eR1a
                 Bz6WYIHV7ejNBgFyLGs8toDjppZRR7MjtUR6y6ocd8e24e2CNYi%%v4JpMtXEf3jj
                 *QPIp5scIbTeY0ZzA==
    
    NOTE: The password you received will only be valid for this login.
    
    Enter onetime password:
    
  • Copy the output generated by the switch (similar to the results above) and send it to the GTAC, so they can use the information to to generate the one-time failsafe password.
Additional notes
Note that the password generated is only good for the challenge that was used to generate it. If you mistype the password, or otherwise have to get a new challenge, you will need to contact GTAC with the new challenge information.

If the failsafe account is disabled on the console port, one-time failsafe will also be disabled. It is not possible to disable one-time failsafe separately from the configured failsafe account.
See also: How To Create a Failsafe Account

If the switch is running a version of EXOS below 16.2, this one-time failsafe login is not available. In order to recover a lost password, one of the methods in the article below will need to be used:
How to Recover an EXOS Switch and its Configuration Without the Password

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