VDX 6740 Boot Prom Password

[Ozkan]

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,

[Ozkan]

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,

[Truyen_Phan · Accepted solution]

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 3 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

[Truyen_Phan]

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.

[Ozkan]

Hi,

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

NpNmUWe.LJy6EKFWnQQ7Zg==

Thanks,