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authentication failure when setup new password


Hi When I setup a new F5, I got anthentication issue. Please see below. After I was required to change password, I created new password, but  I got authentication issue. I do not know what is wrong? Anyone can provide suggestion? Thank you

BIG-IP 15.1.0 Build 0.0.31
Kernel on an x86_64
localhost login: root
You are required to change your password immediately (root enforced)
Changing password for root.
(current) UNIX password:

Authentication failure

BIG-IP 15.1.0 Build 0.0.31


Hello friend , 
        you are prompted to this shap while opening your F5 Big-IP appliance first time. 
you need to use the default credentials first as below : 
> localhost login : root 
> Password : default

>(current) UNIX password: default 
" enter the default Password again for UNIX " 

After That you are prompted to set the new root Password and Confirmation as well. 

Then , F5 Command line Bash prompt will appear for you.

I hope my reply meets your needs. 🙂

Mohamed Kansoh