Indicates the administrative link type configuration of
a bridge port for the RSTP protocol.
pointToPoint -- the port is administratively configured to
be connected to a point-to-point link.
shared -- the port is administratively configured to be
connected to a shared medium.
auto -- the administrative configuration of the port's
link type depends on link duplex of the port.
If the port link is full-duplex, the administrative
link type configuration on this port will be taken
as pointTopoint(1). If the port link is half-duplex,
the administrative link type configuration on this
port will be taken as shared(2).
This configuration of this object only takes effect when the
stpxSpanningTreeType is mst(4) or rapidPvstPlus(5).