This read-write Integer32, ranging 3 to 255, sets the maximum possible height of the network clock distribution tree, and per the description must be configured identically on all devices participating in NCDP, and only matters when the distribution method is ncdp. An admin must coordinate this value network-wide, since a mismatch between devices could cause inconsistent convergence behavior across the NCDP topology. Because convergence time scales with diameter times message interval, an admin planning a large NCDP network would need to raise this value consistently across all participating devices rather than on just one.