The state level of this port. A value of 'none' indicates the port is either in its initial creation state or is just about to be deleted. A value of 'ghost' represents a port that is not physically present. This state may represent a pre-provisioned port. A value of 'linkDown' represents a port that is physically present but does not have a link. The 'linkUp' state represents a port that is physically present and has physical link present. A port in 'up' state is ready to pass some kinds of traffic. The tmnxPortUpProtocols variable indicates the actual type(s) of traffic can be passed on this 'up' link.