let each implementation handle conversion if the
actual state is represented as integers or whatever, but for
this interface just let it be strings, e.g. DISABLED, AUTO or something

the state options should be the same on the netbox for ports
that support it, so no need to check that per interface.
what we actually care about is if the interface supports poe,
so this does that more explicitly

poe state indexing uses double index of the stack unit number
and a interface number. Only place i wasa able to find
these nubmers for the interface is in the name,
so this is a bit scuffed