A weight metric used by the NCDP protocol entity and
associated with a physical interface that supports
synchronous clock recovery. When NCDP is enabled for the
physical interface the value of this object is used by NCDP
algorithms during tree computations.
The lower the administrative weight, the more attractive
the given link is to the NCDP algorithm. If the weight of
a link is changed, it can cause the NCDP protocol entity
to reconstruct the clock distribution tree.