Patent ID: 7502372
Filing Date: 2009-03-10
Classification: H04L

Abstract:
1. A device for routing a multicast packet between at least one first device using IPv6 as a communication protocol and at least one second device using IPv4 as a communication protocol and for accepting both an IPv6 multicast routing protocol and an IPv4 multicast routing protocol, the device comprising: plural interfaces connected via a network to either of the at least one first device or the at least one second device; a memory unit for storing a plurality of the interfaces intended to route an IPv6multicast packet transmitted from the one of the at least one first device; a transmission/reception unit for routing the IPv6 multicast packet received from one of the plurality of interfaces to others of the interfaces; and a conversion unit for converting an IPv6 multicast address contained as a destination address in the received IPv6 multicast packet into an IPv4 multicast address and generating from the IPv6 multicast packet an IPv4 multicast packet containing the IPv4 multicast address as a destination address, wherein the transmission/reception unit routes the IPv4 multicast packet to the interface stored in the memory unit, and wherein the conversion unit converts the IPv6 multicast address into the IPv4 multicast address by deleting a fixed pattern contained in the IPv6 multicast address.