Index into the mplsTunnelHopTable entry that specifies the
explicit route hops for this destination of the P2MP tunnel.
This object represents the configured route for the branch
of the P2MP tree to this destination and is meaningful only
at the head-end (ingress or root) of the P2MP tunnel. Note
that many such paths may be configured within the
mplsTunnelHopTable for each destination, and that the object
cmplsTeP2mpTunnelDestPathInUse identifies which path has been
selected for use.