| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To improve the utilization efficiency of a network by canceling invalid packets such as a packet of data omission. <P>SOLUTION: In a plurality of line cards 1 loaded in an IP router, a TCP management table 4 stores the sequence number of a packet to be received next as a Seq number and stores the sequence number of a latest packet received by the packet receiving side as an Ack number and an input side TCP segment management part 2 receives a packet transmitted by a LAN or the like through a network transmitting/receiving circuit 7 or the like, compares the sequence number of the received IP packet with the Seq number and the Ack number stored in the table 4, and when the value of the sequence number is not less than the Ack number and not more than the Seq number, updates the Seq number stored in the table 4 to the sequence number of the packet to be received next, transmits the sequence number to another line card 1 through an inter-card transmitting/receiving circuit 9, and cancels the received packet. <P>COPYRIGHT: (C)2003,JPO</p> |
