This value defines the operational status for the Ethernet-like
interface. If the link is operating normally, the value is
operational(1). State disabled(2) is entered if an error occurs.
Errors that will cause this state are Symbol Period error, Frame
Period error, Frame error, and Frame Seconds Summary error. Setting
the state to operational(1) when it is in state disabled(2) will
cause all violation errors to be cleared. Any other write of this
object will have no effect.
This value SHOULD NOT be maintained across reboot.