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VDX 6740 Boot Prom Password

  • 1 November 2019
  • 5 replies
  • 1469 views

Hi,

Can anybody help me about boot prom password recovery? One of our switches has an error : “Error: Network OS is not ready. Please login later”. I dediced to re-install firmware but when I tried to enter command shell on u-boot, asks me password. We couldnt find the it. How to reset boot prom password?

 

Thanks,

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Best answer by Truyen Phan 1 November 2019, 12:12

Also, “Error: Network OS is not ready. Please login later” means that the configuration DB is corrupted possibly due to ungraceful shutdown, so NOS didn’t fully initialized. 

 

Once the boot prom password is recovered, you can do the following to default the config which will allow the OS to fully initialize. 

 

  1. Power cycle the switch and get into Boot PROM (Hit ESC during AutoBoot)
  2. Type at the prompt to open the command shell
  3. Enter setenv bootargs 'root=/dev/sda$prt rootfstype=ext4 quiet S'
  4. Enter saveenv
  5. Enter reset
  6. Enter mount -vo remount,rw,noatime /
  7. Enter mount /dev/sda2 /mnt
  8. Enter /fabos/sbin/cfgcleanup to default the configuration on bootup 
  9. Enter bootenv bootargs 'root=/dev/sda$prt rootfstype=ext4 quiet'
  10. Enter "partman -r" to reboot

 

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5 replies

Userlevel 3

Hello,

Can you provide the boot recovery string that is given?

With that, we can provide the recovery string to allow you to reset the password. 

 

Hello,

Can you provide the boot recovery string that is given?

With that, we can provide the recovery string to allow you to reset the password. 

 

Hi,

 

Thank you for your reply. Here’s the recovery string;

 

NpNmUWe.LJy6EKFWnQQ7Zg==

 

Thanks,

 

Userlevel 3

Please try this to recover the password. 

The new boot recovery password is: J3z3l36hmhEUA0ON1qnTWA==

 

Once it prompts you to set a new password, you can just press enter. The blank password will disable the password requirement until one is set.

Userlevel 3

Also, “Error: Network OS is not ready. Please login later” means that the configuration DB is corrupted possibly due to ungraceful shutdown, so NOS didn’t fully initialized. 

 

Once the boot prom password is recovered, you can do the following to default the config which will allow the OS to fully initialize. 

 

  1. Power cycle the switch and get into Boot PROM (Hit ESC during AutoBoot)
  2. Type at the prompt to open the command shell
  3. Enter setenv bootargs 'root=/dev/sda$prt rootfstype=ext4 quiet S'
  4. Enter saveenv
  5. Enter reset
  6. Enter mount -vo remount,rw,noatime /
  7. Enter mount /dev/sda2 /mnt
  8. Enter /fabos/sbin/cfgcleanup to default the configuration on bootup 
  9. Enter bootenv bootargs 'root=/dev/sda$prt rootfstype=ext4 quiet'
  10. Enter "partman -r" to reboot

 

Hi,

 

First of all, THANK you for your support. I’ve cleared the boot prom password. I’m upgrading NOS, after that I’ll process your way :)

 

Thanks,

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