| 摘要 |
In a data transmission apparatus, provisions are made to be able to trace the result of processing or discarding of a specific packet from outside the apparatus. More specifically, in a data transmission apparatus that receives data having a header and, based on information carried in the header, performs processing such as destination determination, discard processing, and priority transmission processing on the received data by using a plurality of processing blocks, a memory for storing the processing results supplied from the respective processing blocks in the data transmission apparatus is provided, wherein a flag is appended only to the data that needs tracing and only the processing result of the thus flagged data is stored in the memory, and wherein, after completing the processing, only the processing result of the flagged data is forcefully output outside the apparatus thus enabling the processing result to be retrieved.
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