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    • 7. 发明授权
    • Packet classification device for storing groups of rules
    • 用于存储规则组的分组分类设备
    • US07933282B1
    • 2011-04-26
    • US11935270
    • 2007-11-05
    • Pankaj GuptaLiao Wei-Cherng
    • Pankaj GuptaLiao Wei-Cherng
    • H04L12/56
    • G06F17/30982
    • A packet classification device includes a CAM device, an SRAM device, and a control circuit that controls and coordinates the operations of the CAM and SRAM devices. For some embodiments, a first CAM block stores unique entries for each packet header field, a RAM block coupled to the first CAM block stores field labels for the unique packet header fields, a second CAM block stores group labels consisting of unique combinations of concatenated field labels, and a second RAM block coupled to the second CAM block stores a group identification (ID) for each group label, wherein each group ID identifies a corresponding one of the groups of rules.
    • 分组分类装置包括CAM装置,SRAM装置和控制和协调CAM和SRAM装置的操作的控制电路。 对于一些实施例,第一CAM块存储每个分组报头字段的唯一条目,耦合到第一CAM块的RAM块存储用于唯一分组报头字段的字段标签,第二CAM块存储由连接字段的唯一组合组成的组标签 标签和耦合到第二CAM块的第二RAM块存储每个组标签的组标识(ID),其中每个组ID标识规则组中的相应一个组。