Multicast routing method and apparatus for routing multicast packet
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Abstract
A communications apparatus for converting an IPv4 multicast packet transmit from an IPv4 terminal into an IPv6 multicast packet and transmitting the converted IPv6 multicast packet to one of a plurality of IPv6 networks. The communications apparatus has information indicating to which IPv6 network the IPv4 multicast packet to undergo conversion processing is to be transmitted. The communications apparatus then converts the received IPv4 multicast packet into an IPv6 multicast packet and transmits the converted IPv6 multicast packet to an IPv6 network where it is required to be sent.
23 Citations
33 Claims
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1-21. -21. (canceled)
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22. A device for routing a multicast packet between at least one first device using IPv4 as a communication protocol and at least one second device using IPv6 as a communication protocol, the device comprising:
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two or more 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 an interface of the two or more interfaces intended to route an IPv4 multicast packet transmitted from the one of the at least one first device;
a transmission/reception unit for routing the IPv4 multicast packet received from the one of the two or more interfaces to another of the two or more interfaces; and
a conversion unit for converting an IPv4 multicast address contained as a destination address in the received IPv4 multicast packet into an IPv6 multicast address and generating from the IPv4 multicast packet an IPv6 multicast packet containing the IPv6 multicast address as a destination address, wherein the transmission/reception unit routes the IPv6 multicast packet to the interface connected to the at least one second device stored in the memory unit, and wherein an IPv4 multicast route protocol and an IPv6 multicast route protocol are managed and the IPv4 multicast addresses and IPv6 multicast addresses are stored in a dynamically corresponding manner. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29)
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30. A device for routing a multicast packet between at least one first device using IPv4 as a communication protocol and at least one second device using IPv6 as a communication protocol, the device comprising:
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two or more interfaces connected via a network to one of the at least one first device or the at least one second device;
a memory unit for storing an interface of the two or more interfaces which is intended to route an IPv4 multicast packet transmitted from one of the at least one first device;
a transmission/reception unit for routing the IPv4 multicast packet received from one of the two or more interfaces to another of the two or more interfaces; and
a conversion unit for converting an IPv4 multicast address contained as a destination address in the received IPv4 multicast packet into an IPv6 multicast address, converting an IPv4 unicast address contained as a source address in the IPv4 multicast packet into an IPv6 unicast address, and generating from the IPv4 multicast packet an IPv6 multicast packet containing the IPv6 multicast address as a destination address and containing the IPv6 unicast address as a source address, wherein the transmission/reception unit routes the IPv6 multicast packet to the interface connected to the at least one second device stored in the memory unit, and wherein an IPv4 multicast route protocol and an IPv6 multicast route protocol are managed and the IPv4 multicast addresses and IPv6 multicast addresses are stored in a dynamically corresponding manner.
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31. A device for routing a multicast packet between at least one first device connected to an IPv4 network and at least one second device connected to an IPv6 network, the device comprising:
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two or more interfaces connected via an IPv4 network or IPv6 network to one of the at least one first device or the at least one second device;
a memory unit for storing an interface of the two or more interfaces which is intended to receive an IPv4 multicast packet transmitted from the at least one first device and which is connected to the at least one first device or the at least one second device;
a transmission/reception unit for routing the IPv4 multicast packet received from one of the two or more interfaces to another interface; and
a conversion unit for converting an IPv4 multicast address contained as a destination address in the received IPv4 multicast packet into an IPv6 multicast address and generating from the IPv4 multicast packet an IPv6 multicast packet containing the IPv6 multicast address as a destination address, wherein the transmission/reception unit routes the IPv6 multicast packet to the interface stored in the memory unit which is connected to the at least one second device, and wherein an IPv4 multicast route protocol and an IPv6 multicast route protocol are managed and the IPv4 multicast addresses and IPv6 multicast addresses are stored in a dynamically corresponding manner. - View Dependent Claims (32, 33)
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Specification