The object specifies the average power which has been consumed
by the port. It is a read/write integer value with units of
Watts (note - Watts is chosen instead of milliWatts here since
the IETF Power MIB [1] measures unit based parameters, such as
the pethMainPsePower object, in units of Watts). Writing a value
of zero to this object resets its value to zero. Writing any
other value to this object has no effect on its value and an error
is returned.