On the S- K- and 7100-Series devices, the boot menu is called the System Image Loader menu. This menu provides for such boot related functionality as the ability to:
By default you can gain access to this menu as the device is booting by pressing any key once you see the line:
Press any key to enter System Image Loader menu
Pressing any key places you at the System Image Loader prompt:
[System Image Loader]:
See Setting the Boot Firmware Image for additional boot menu information.
Access to the boot menu can be enabled or disabled using the set security boot-access command. The show security boot-access command displays the current boot menu access setting for the device.
Disabling access to the boot menu affects all user privilege modes, including super-user.