Terminal-to-terminal communication connection control method using an IP transfer network

摘要

A terminal-to-terminal communication connection control method with employment of an IP transfer network, wherein: while a destination multicast address is registered into an address administration table of a network node apparatus, in such a case that a destination multicast address contained in a header of an external IP packet entered into said network node apparatus is not registered in said address management table, said network node apparatus discards said external IP packet so as to avoid that an unexpected external IP packet is mixed into the IP transfer network.