The maximum time that the FC-Port shall hold a frame
in the transmitter buffer before discarding it, if it
is unable to deliver the frame.
The value 0 in this object means the frame will be
discarded immediately if the port is unable to deliver
the frame.
Since this is a characteristic of a physical port, this
object is not applicable for Port Channel ports, i.e.,
the value is instantiated but its value is irrelevant.