| 摘要 |
<p>Attention is paid on the point that respective IP headers have the same identifier during IP packet division. When a head of a divided packet has come, it is known that the intermediate portion and the end portion of the divided packet having the same identifier will come subsequently. Accordingly, a new table (QoS condition table for divided packets/packet filter condition table for divided packets) is prepared so that Qos control information and filtering information obtained according to the information on a layer (4) existing only in the head packet can be acquired from the identifier of the head packet. During processing of the head packet, registration into the table is also performed. Thus, when performing QoS search and packet filtering to the intermediate portion or the end portion of the divided packet coming subsequently, the same information as the information acquired by the head packet can be obtained only by adding the new table search additionally because the new table prepared contains the information registered with the same identifier.</p> |
