| 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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