@opencv15
try the procedure below, just save the licenses in any case.
Reload or power cycle the switch while connected via console.
While the switch is booting, use CTRL-C to break the switch into loader> prompt.
From the loader> prompt, enter cmdline recoverymode=1. This stops the switch booting at the switch(boot)# prompt:
loader > cmdline recoverymode=1
Begin the boot procedure with boot bootflash:<nxos_filename.bin>.
loader > boot bootflash:nxos.7.0.3.I7.8.bin
The switch boots to the switch(boot)# prompt. At this prompt write, 0's to all blocks in nvram, except the license blocks, using clear nvram CLI as well as init system CLI.
Note: this test was carried out on an N9K-C9372TX-E with an Intel Core i3- CPU @ 2.50GHz and a 110G SSD. Total time for init system took ~8 seconds:
switch(boot)# clear nvram
switch(boot)# init system
This command is going to erase your startup-config, licenses as well as the contents of your bootflash:.
Do you want to continue? (y/n) [n] y
Once step 5 is complete, reload the switch:
switch(boot)# reload
This command will reboot this supervisor module. (y/n) ? y
https://www.cisco.com/c/en/us/support/docs/ios-nx-os-software/nx-os-software/216547-nxos-securely-erase-the-contents-of-th.html
Tag me to follow up.
Please mark it as Helpful and/or Solution Accepted if that is the case. Thanks for making Engineering easy again.
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