| 摘要 |
Address filters 3 - 0 to 3 -m take only those of unicast packets which are addressed to output ports corresponding to them, and an address filter 4 for multicasting takes only multicast packets. When multicast packet output buffers 5 - 0 to 5 -m receive output permissions from output arbitrators 6 - 0 to 6 -m, they send out packets in the accumulation order thereof to corresponding OR gates 9 - 0 to 9 -m for being outputted to output ports. A multicast packet output buffer 7 outputs packets to the output ports when they obtain output permissions from the output arbitrators 6 - 0 to 6 -m corresponding to the output ports, which output data for multicasting from a bit map table 8 are to be outputted from.
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