This paper proposed the design of Dawning 5000 multicast network based on fat-tree topology.Multicast's latency can be lowed by reducing the interference between unicast and multicast

while the completion of multicast can only be guaranteed by freeing the deadlock.To solve deadlock problem

this paper proposed a deadlock avoidance design based on Resource Bulletin Board.To reduce the interference

this paper proposed a multicast routing algorithm which selects light- weighted multicast path by eliminating heavy-loaded switches.Compared with existing load balancing routing algorithm

the algorithm proposed in this paper can fully use light-weighted paths and achieve three times performance improvement.Besides

under many-to-many multicast communication

Dawning5000 multicast network can achieve more than 90% multicast throughput.