Abstract: A component comprising: a first case portion having a tunnel portion having an opening end opening toward an axial direction; and a second case portion having a catch tank portion opening upward, wherein the first case portion and the second case portion face each other such that a bottom portion of the tunnel portion and a bottom portion of the catch tank portion are coupled to each other, an opening area of the opening end of the tunnel portion on the second case portion side is larger than an opening area of the opening end of the tunnel portion on a side opposite to the second case portion side, the tunnel portion as a whole is inclined downward from the second case portion side of the tunnel portion to the side opposite to the second case portion side of the tunnel portion, and the second case portion side of the tunnel portion is inclined downward toward the catch tank portion.

Abstract: The present invention is directed to the provision of a packet transmission apparatus and, more particularly, to a packet transmission apparatus achieving high-speed processing capability and enhanced relay quality for multicast packets. The packet transmission apparatus comprises: a non-copy packet arbiter which selects one of the non-copy packets by a prescribed algorithm, and requests transmission of the selected non-copy packet; a copy packet arbiter which selects one of the copy packets by a prescribed algorithm, and requests transmission of the selected copy packet; and a final arbiter which selects either one of the transmit requests, the transmit request from the non-copy packet arbiter or the transmit request from the copy packet arbiter, by a prescribed algorithm, and requests transmission of the selected packet, and wherein: the packet transmission apparatus transmits the packet requested by the final arbiter for transmission.

Abstract: The present invention is directed to the provision of a packet transmission apparatus and, more particularly, to a packet transmission apparatus achieving high-speed processing capability and enhanced relay quality for multicast packets. The packet transmission apparatus comprises: a non-copy packet arbiter which selects one of the non-copy packets by a prescribed algorithm, and requests transmission of the selected non-copy packet; a copy packet arbiter which selects one of the copy packets by a prescribed algorithm, and requests transmission of the selected copy packet; and a final arbiter which selects either one of the transmit requests, the transmit request from the non-copy packet arbiter or the transmit request from the copy packet arbiter, by a prescribed algorithm, and requests transmission of the selected packet, and wherein: the packet transmission apparatus transmits the packet requested by the final arbiter for transmission.