In Boot Rom v22.214.171.124, the config none
command has been removed for security reasons. It was added back into Boot Rom v126.96.36.199.
If the config none
command is not present, the only way to default the switch from boot rom is by loading a rescue image (see How to use the Boot Rom menu to tftp download a new image to the switch
If the banner still appears after using the config none
command, still login with the default username and password anyway. The banner can be stored in a different part of the memory so it displays before EXOS is fully loaded.
There is no mechanical process such as a switch to clear the config, which means console access is mandatory.