| 摘要 |
A method of managing rule entries of a Ternary Content Addressable Memory (TCAM) in a routing system includes: creating a hash table having a hash key corresponding to each entry; creating a single linked list for linking nodes, the single linked list using the entry of the hash table as a head node and including rule IDs and sequence IDs assigned according to a rule input order; and a double linked list having an independent head node, the double linked list bidirectionally linking the nodes constituting the single linked list according to an order of the sequence IDs. Thus, the packet classifying/filtering rule can be easily added to the TCAM or deleted from the TCAM only with minimal information. Also, the sequence ID reassignment process, required for storing as many rules in the TCAM as possible according to the priority of the rules, is performed when a certain time elapses following rule addition or deletion, thereby reducing a latency that may be caused upon setting the packet classifying/filtering rule.
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