| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To improve the accuracy of address filtering of a destination MAC address for judging whether to receive a frame from a network. <P>SOLUTION: Two MAC address hash tables 1A and 1B, and two MAC address hashing parts 27A and 27B in accordance with the two MAC address hash tables 1A and 1B are provided, and a specific reversed MAC address obtained by reversing a specific MAC address 3 and each bit is respectively registered in the MAC address hash tables 1A and 1B. One of the MAC address hashing parts 27A and 27B performs hash processing on the basis of the destination MAC address 120 to retrieve the MAC address hash table 1A, the other performs hash processing on the basis of a destination reversed MAC address 21 obtained by reversing the destination MAC address 3 and each bit to retrieve the MAC address hash table 1B, and only when the both hash processing make a hit, a command 22 for receiving a reception frame is outputted. <P>COPYRIGHT: (C)2004,JPO&NCIPI</p> |
