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Enabling or Disabling the USB Port
The autorun feature only works when a USB device is inserted and the USB
port is enabled.
Behavior of Autorun When USB Port is Disabled
Software Versions K.13.XX Operation
When using software version K.13.58, if the USB port is disabled (no usb-port
command), the USB autorun function does not work in the USB port until the
USB port is enabled, the config file is saved, and the switch is rebooted. The
5 volt power to the USB port remains on even after the USB port has been
disabled.
For software versions after K.13.58, the 5 volt power applied to the USB port
is synchronized with the enabling of the USB port, that is, when the USB port
is enabled, the 5 volts are supplied; when the USB port is disabled, the 5 volts
are not supplied. For previous software versions the power was supplied
continuously. The autorun function does not require a switch reboot, but the
USB device must be inserted at least once after the port is enabled so that the
switch recognizes that the device is present. If the USB device is inserted and
then the USB port is enabled, the switch does not recognize that a USB device
is present.
Software Version K.14.XX Operation
For software versions K.14.XX, the USB port can be disabled and enabled
without affecting the autorun feature. When the USB port is enabled, the
autorun feature activates if a USB device is already inserted in the USB port.
Power is synchronized with the enabling and disabling of USB ports as
described above for K.13.59 and later software.
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