| 摘要 |
Each transmission port module includes a plurality of queues in association with combinations of a priority and a VLAN number. An accumulated-amount storage unit stores a total size of packets accumulated in queues associated with the same priority. A threshold storage unit stores a threshold of a total packet accumulated amount for each queue. When a packet is received, whether to discard the packet is determined based on a total packet accumulated amount stored in the accumulated-amount storage unit in association with a priority set for the packet and the threshold stored in the threshold storage unit in association with a storage-destination queue of the packet.
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