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    • 9. 发明申请
    • SYSTEM AND METHOD FOR STORING FRAME HEADER DATA
    • 用于存储帧头数据的系统和方法
    • WO0186869A3
    • 2002-05-23
    • PCT/US0114682
    • 2001-05-07
    • CROSSROADS SYS INCNELSON MICHAEL ABUCHT THOMAS W
    • NELSON MICHAEL ABUCHT THOMAS W
    • H04L12/56H04L29/06
    • H04L49/9042H04L49/90H04L69/22
    • A system and method for storing header information in parallel with corresponding frames of data, wherein the frames of data are stored in a first-in-first-out buffer and wherein the header information is accessed to make routing decisions for the frames of data while avoiding having to read the frames out of the buffer. In one embodiment, this buffer system is implemented in a port of a network switch. Receive logic in the port stores frames of data in the storage elements of a FIFO buffer and concurrently snoops on the frame data to obtain header information. The header information is stored in a buffer separate from the FIFO that stores the frames. The header information can be read from the header buffer rather than the frame buffer. A routing decision for each frame can be made before a previous frame is completely read out of the frame FIFO, hence before the corresponding frame is ready to be transmitted. A timer may also be associated with each header in the header buffer so that it can be determined when frames are stale and must be discarded.
    • 一种用于与对应的数据帧并行地存储报头信息的系统和方法,其中数据帧被存储在先进先出的缓冲器中,并且其中访问报头信息以对数据帧进行路由决定, 避免了将帧从缓冲区中读出。 在一个实施例中,该缓冲系统被实现在网络交换机的端口中。 端口中的接收逻辑存储FIFO缓冲器的存储元件中的数据帧,并对帧数据进行窥探,以获得标题信息。 标题信息存储在与存储帧的FIFO分开的缓冲器中。 标题信息可以从标头缓冲区而不是帧缓冲区读取。 可以在先前帧从帧FIFO完全读出之前,因此在对应的帧准备好被发送之前,可以对每个帧进行路由决定。 定时器还可以与头部缓冲器中的每个头相关联,使得可以在帧何时陈旧并且必须被丢弃时确定定时器。