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    • 3. 发明授权
    • Algorithm to bypass L4 processing in an internet protocol forwarding processor
    • 在互联网协议转发处理器中绕过L4处理的算法
    • US06654372B1
    • 2003-11-25
    • US09543144
    • 2000-04-05
    • Francis ArtsOlivier Didier DuroyonAnthony Matteo GalloBrahmanand Kumar GortiDonald Newland JonesNatarajan VaidhyanathanColin Beaton Verrilli
    • Francis ArtsOlivier Didier DuroyonAnthony Matteo GalloBrahmanand Kumar GortiDonald Newland JonesNatarajan VaidhyanathanColin Beaton Verrilli
    • H04L1256
    • H04L45/00H04L45/302
    • A controllable mechanism for by-passing Layer 4 (L4) classification is based on the insertion into a set of MAC rules in SA MAC lookup means a set of Layer 4 (L4) Skip Classification Flags. Routing is accomplished by selecting which rule to apply to the packet and reading the state of the corresponding L4 Skip Classification Flag. In response to a first state of said corresponding L4 Skip Classification Flag, performing an L4 classification followed by a routing of the data packet. In response to a second state of said corresponding L4 Skip Classification Flag, reading the state of a Global Classification Flag. In response to a first state of said Global Classification Flag, performing an L4 classification followed by a routing of said data packet. In response to a second state of said Global Classification Flag performing a routing of the data packet. The L4 Skip option change does not use the option change of reading the L4 Skip Classification Flag from the port table, whereas the second embodiment uses this option. The third and fourth embodiments are similar to the first and second embodiments but with the. addition of inserting into a set of Layer 3 (L3) rules in L3 lookup means a set of Layer 4 (L4) Classification Required Flags. The third embodiment does not use the option of reading the L4 Skip Classification Flag from the port table, whereas the fourth embodiment uses this option.
    • 用于旁路第4层(L4)分类的可控机制是基于在SA MAC查找中插入一组MAC规则的方法,即一组第4层(L4)跳过分类标志。 通过选择哪个规则应用于分组并读取相应的L4跳过分类标志的状态来完成路由。 响应于所述对应的L4跳过分类标志的第一状态,执行L4分类,然后进行数据分组的路由。 响应于所述对应的L4跳过分类标志的第二状态,读取全局分类标志的状态。 响应于所述全局分类标志的第一状态,执行L4分类,然后进行所述数据分组的路由。 响应于所述全局分类标志的第二状态执行数据分组的路由。 L4跳过选项更改不使用从端口表读取L4跳过分类标志的选项更改,而第二个实施例使用此选项。 第三和第四实施例类似于第一和第二实施例,但是与。 在L3查找中插入到一组第3层(L3)规则中的添加意味着一组第4层(L4)分类要求标志。 第三实施例不使用从端口表读取L4跳过分类标志的选项,而第四实施例使用该选项。