Recirculated Multicast Switch Based on Tandem Expanded Delta Network

High speed networking applications like video-on-demand require the support of switches that can handle very high multicast loads. Switches studied in the past can support multicast loads of 2530% To overcome this limitation, Tandem Expanded Delta Network(TEDN) multicast switch was proposed to support more higher multicast load by 8590% without degradation in the performance But there is tremendous routing capacity that is not used in the series of routing network blocks. This paper presents modified TEDN multicast switches to save the excessive routing capacity. by recirculating packets in last routing network, we can achieve the acceptable packet loss ratio with the smaller number of routing network blocks. Extensive simulations show that our proposed switches have the acceptable packet loss ratio with reduced hardware cost