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Aswin_mk's avatar
Aswin_mk
Icon for Cirrocumulus rankCirrocumulus
Aug 02, 2024

Root password recovery via console

Hello Community,

 

One of our F5 devices got to hung state after /var got 100%. I am not able to access the device via GUI and tacacs/root passwords not working via CLI. Device is up and reachable. So, i connected F5 console via RJ45 to a console server. From console server i tried to access F5 and getting login page. But when i try a reboot for password recovery i am not seeing boot page or GRUB option. (steps : Restarting the BIG-IP system in single-user mode (GRUB 0.97) (f5.com))

 

Please let me know if Connecting console via RJ45 will not help in this console process or not. 

 

console prompt once F5 done reboot. I am not getting physical support for do serial connection via laptop.so we done RJ45 connection to console server(Raritan).

 

 

console session
  • Aswin_mk's avatar
    Aswin_mk
    Aug 03, 2024

    Hi thanks for your reply. I resolved it, I am getting the GRUb menu now once I reset baud rate again in Raritan switch. Thank 

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  • Aswin_mk's avatar
    Aswin_mk
    Icon for Cirrocumulus rankCirrocumulus
    Aug 03, 2024

    Hi thanks for your reply. I resolved it, I am getting the GRUb menu now once I reset baud rate again in Raritan switch. Thank 

  • boneyard's avatar
    boneyard
    Icon for MVP rankMVP
    Aug 03, 2024

    What model BIG-IP is this?

    In general you should just get the GRUB boot menu with any serial connection, perhaps it is the console server which is doing something odd? Is it possible to get someone over there with a laptop?