Communication control unit and communication control method applied for multicast-supporting lan
AssigneeFujitsu Limited
InventorNaofumi Kobayashi
Life of this patent
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Abstract
A multicast processing section constructs, when it is determined that a received packet is a packet on a multicast packet and multicast group management protocol, a table showing a correlation between a host device and a multicast group in a port number-multicast physical address correlation storing section as well as in a multicast router-connected port storing section according to the received packet, and controls to transfer a packet for each multicast group between a multicast router and host devices according to the table.
Claims5
A switch for transmitting a packet in a network, comprising:
- a first port receiving a first packet;
- a second port receiving a second packet;
- a processor determining that the received first packet from the first port is a first message packet that has been transmitted under a multicast group management protocol to inform that a host device connected to the first port desires to leave a multicast group, and determining that the received second packet from the second port is a second message packet that has been transmitted under the multicast group management protocol in response to the first message packet;
- and
- a transmitter transmitting the received second packet through a port to which a multicast router is connected when the processor determines that the received second packet is the second message packet.
A switch for transmitting a packet in a network, comprising:
- a first port receiving a first packet;
- a second port receiving a second packet after the first port receives the first packet;
- a processor determining that the received first packet from the first port is a first message packet that has been transmitted under a multicast group management protocol to inform that a host device connected to the first port desires to leave a multicast group, and determining that the received second packet from the second port is a second message packet that has been transmitted under the multicast group management protocol in response to the first message packet;
- and
- a transmitter transmitting the received first packet to a port to which a multicast router is connected when the processor determines that the received first packet is the first message packet, and transmitting the received second packet through the port to which the multicast router is connected after the processor determines that the received second packet is the second message packet.
Dependencies are inferred from the claim text.