METHOD AND APPARATUS FOR SEARCHING BY RANGE MATCHING USING CONTENT ADDRESSABLE MEMORY

摘要

A range matching search method using a CAM(Content Address Memory) and an apparatus thereof are provided to effectively perform searching by using the entire 5-tuple, and to be immediately applied for an IPv6 system. The first search table(100) discriminates a rule as the first and second search units, and stores information corresponding to the first search unit in each entry. The second search table(200) stores information corresponding to the second search unit in each entry. A control module(300) extracts the first search key of an input frame to search the first search table, extracts the second search key to search the second search table in order to find the same entry. The first search unit is a transmission IP address and a reception IP address of 5-tuple information, and the second search unit is a transmission port, a reception port and a protocol number.