Multicast packet transferring apparatus, multicast packet transferring system and storage medium used in same

摘要

Multicast packet transferring apparatus and system are provided in which a multicast transferring path is established between different domains. When a multicast packet is transferred from one transferring apparatus existing in one domain to another transferring apparatus existing in another domain, the former transferring apparatus converts the multicast packet fed from a transmitter to a unicast packet and transfers the converted packet to the latter transferring apparatus. The latter transferring apparatus reconstructs the original multicast packet from the received unicast packet and rewrites to replace a transmitter address contained in the reconstructed multicast packet with an address of the transferring apparatus and then transfers the rewritten multicast packet having the rewritten address to specified receivers.