A METHOD AND APPARATUS OF REALIZING MULTICAST TRANSMISSION

摘要

A method and apparatus of realizing multicast transmission, and the method includes: when receiving multicast data needing to be transmitted across a network, the ingress PE determines the egress PEs matched with the multicast data according to the multicast address of the multicast data and the matching relationship between the multicast address and the corresponding egress PEs settled in the ingress PE; the said ingress PE encapsulates the multicast data respectively using each determined egress PE's address, and sends each encapsulated multicast data to the said each determined egress PE respectively in form of unicast through mid-transmission network. With the provided method and apparatus, in case of mid-transmission network not supporting multicast protocol, the multicast transmission using transitional multicast technology can be reached, it is not necessary for the great number of routers in the mid-transmission network to support multicast protocol, and the cost of realizing is reduced.