A process that disallows any bridging onto the signal to be broadcast from any switch of the input stage of the Clos switching network and that further disallows any requests for point-to-multipoint broadcast connections in excess of the number of switches in the center stage of the network avoids the...http://www.google.ca/patents/US5276425?utm_source=gb-gplus-sharePatent US5276425 - Method for broadcasting in Clos switching networks by limiting the number of point-to-multipoint connections
