To partition a distributed fabric system, at least one system port is allocated to each switching domain of multiple non-overlapping switching domains in a distributed fabric system. The assembly comprises a base, a split ring, and a clamp. The valve spring is situated in a spring chamber which is bordered by a regulating sleeve on one side, in an axially moveable manner. The housing andor a reflector of the perimeter lighting fixture is positioned in contact with the trim piece. The ceramic composite armor layer includes a ceramic matrix and unidirectionally oriented fibers disposed within the ceramic matrix.