You need to have console cable connected to DB9 port, USB console (USB – serial) does not work.
Power cycle switch. During booting, wait for
Checking all filesystems....
Then press Ctrl + ]. Then, yo will be logged into switch(boot)# prompt
switch(boot)# config terminal switch(boot-config)# admin-password <new password> WARNING! Remote Authentication for login through console has been disabled switch(boot-config)# exit switch(boot)# load bootflash:nx-os.bin
Use load command, not reload, because the password will not remain changed.