| 摘要 |
<p>PROBLEM TO BE SOLVED: To realize (1) dynamic addition/change of a new packet identification condition, (2) dynamic change of a packet identification processing order and (3) selection of packet identifying processing to be processed next according to the preceding packet identifying result in a packet transferring processor for performing packet identification processing by using a private hardware. SOLUTION: Through an external interface 40, header information is stored in a data register 62, branch condition information including identification processing order is stored in a branch condition register 64, and the combination information of the field of the identification condition to be applied is stored in a combination register 63. A conversion circuit 100 and a sequencer 110, based on the branch condition and the combination information, extracts only a necessary field from the header information and generate a retrieval key. A CAM controller performs retrieval processing to CAM by using this retrieval key. The sequencer 110 judges whether there is packet identification processing to be performed next based on the retrieving result and the branch condition information.</p> |
