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1. 发明授权

US6041058A Hardware filtering method and apparatus 失效
标题翻译：硬件过滤方法及装置
公开(公告)号：US6041058A
公开(公告)日：2000-03-21
申请号：US928882
申请日：1997-09-11
申请人： John A. Flanders , David C. Ready , Steven Van Seters , Leonard Schwartz , William D. Townsend
发明人： John A. Flanders , David C. Ready , Steven Van Seters , Leonard Schwartz , William D. Townsend
IPC分类号： H04L12/46 , H04J3/02 , H04J3/24
CPC分类号： H04L12/4625
摘要： At least a portion of the data units in a bridge/router device are analyzed for purposes of filtering by employing high speed logic circuits. A data unit is analyzed by such logic circuits by examining the header portion of the data unit, employing information obtained from the header portion to designate possible output ports for transmission of the data unit, examining a predefined per-port filter enable indicator to determine whether filtering is to be applied to the data unit, and applying filtering for each respective port for which the per-port filter enable indicator indicates that filtering is to be applied. Filtering is also implemented with logic circuits and executed at high speed. Filtering may be executed based on MAC address group, port group, combination MAC address and port group, protocol type, and non-unicast traffic frequency. Data units that cannot be analyzed by the logic circuits are analyzed by software.
摘要翻译：为了通过采用高速逻辑电路进行滤波，分析桥/路由器设备中的数据单元的至少一部分。这样的逻辑电路通过检查数据单元的报头部分来分析数据单元，采用从报头部分获得的信息来指定用于传输数据单元的可能的输出端口，检查预定义的每端口滤波器使能指示符以确定是否将过滤应用于数据单元，并对每个端口过滤器使能指示符指示要应用过滤的每个相应端口应用过滤。滤波也用逻辑电路实现，并以高速执行。可以根据MAC地址组，端口组，组合MAC地址和端口组，协议类型和非单播流量来执行过滤。逻辑电路无法分析的数据单元由软件分析。

2. 发明授权

US06205149B1 Quality of service control mechanism and apparatus 失效
标题翻译：服务质量控制机制和设备
公开(公告)号：US06205149B1
公开(公告)日：2001-03-20
申请号：US08927650
申请日：1997-09-11
申请人： Thomas A. Lemaire , Paul J. Giacobbe , John A. Flanders , David Lipschutz , Leonard Schwartz , David C. Ready , William D. Townsend
发明人： Thomas A. Lemaire , Paul J. Giacobbe , John A. Flanders , David Lipschutz , Leonard Schwartz , David C. Ready , William D. Townsend
IPC分类号： H04L1228
CPC分类号： H04L12/40163 , H04L12/40032 , H04L12/413 , H04L12/4625 , H04L29/06 , H04L45/742 , H04L47/24 , H04L49/90 , H04L69/18 , H04L69/22
摘要： Quality of Service (“QoS”) variables for predetermined protocol Type data units are stored in a cache memory. For data units that are associated with a flow, thirteen bytes selected out of the Internet Protocol (“IP”) header are employed as at least a portion of a key to perform a cache lookup to obtain at least one Quality of Service variable from the cache. Both routing and QoS information may be stored in the cache for retrieval upon a single lookup operation.
摘要翻译：用于预定协议的服务质量（“QoS”）变量类型数据单元存储在高速缓冲存储器中。对于与流相关联的数据单元，从因特网协议（“IP”）头部选择的13个字节被用作密钥的至少一部分以执行高速缓存查找，以从所述至少一个服务质量变量获得至少一个服务质量变量缓存。路由和QoS信息都可以存储在缓存中以便在单次查找操作时进行检索。

3. 发明授权

US06185214B2 Use of code vectors for frame forwarding in a bridge/router 失效
标题翻译：在桥接器/路由器中使用代码矢量进行帧转发
公开(公告)号：US06185214B2
公开(公告)日：2001-02-06
申请号：US08927915
申请日：1997-09-11
申请人： Leonard Schwartz , John A. Flanders , William D. Townsend , David C. Ready
发明人： Leonard Schwartz , John A. Flanders , William D. Townsend , David C. Ready
IPC分类号： H04L1228
CPC分类号： H04L12/5601 , H04L49/30 , H04L49/351 , H04L49/354 , H04L49/602
摘要： A Receive Frame Processor (RFP) in a network bridge/router for receiving frame-characterizing information from other elements of the bridge/router and for generating plural code vectors which result in the selective processing of a received frame in software and/or hardware is provided. The received information is utilized in constructing code vectors representative of how a received frame is to be processed. Further data structures stored in conjunction with the RFP are indexed by the constructed code vectors and indicate whether the frame is to be processed in the RFP hardware, by software in an associated Frame Processor, or both. These data structures also indicate whether the port through which the frame was received is to be blocked to prevent misordering of received frames. If the frame is to be processed in software, the RFP generates a Receive Vector which is provided to the FP and which conveys the frame-characterizing code vectors to the FP. If the frame is to be processed in hardware by the RFP, a Transmit Vector is generated which contains information such as a mask of which transmit ports are to be utilized for forwarding the received frame, and information necessary for reconstructing a header for the received frame, including which encapsulation format is to be utilized for the frame.
摘要翻译：网桥/路由器中的接收帧处理器（RFP），用于从桥接器/路由器的其他元件接收帧表征信息，并产生导致在软件和/或硬件中对接收到的帧进行选择性处理的多个码矢量，提供。接收到的信息用于构造代表如何处理接收的帧的代码矢量。与RFP一起存储的进一步的数据结构由构造的代码向量索引，并通过相关联的帧处理器中的软件或两者在RFP硬件中指示帧是否被处理。这些数据结构还指示是否阻止帧被接收的端口，以防止接收到的帧错位。如果要以软件处理该帧，RFP将生成一个提供给FP的接收向量，并向帧中传送帧特征码向量。如果帧要由RFP在硬件中处理，则生成发送向量，其包含诸如要用于发送接收到的帧的发送端口的掩码的信息，以及用于重建接收到的帧的报头所需的信息，包括哪个封装格式要用于该帧。

4. 发明授权

US5978378A Method and apparatus for VLAN support 失效
标题翻译：支持VLAN的方法和设备
公开(公告)号：US5978378A
公开(公告)日：1999-11-02
申请号：US927641
申请日：1997-09-11
申请人： Stephen L. Van Seters , Ryan T. Ross , Leonard Schwartz , David C. Ready , John A. Flanders , Robert P. Ryan , William D. Townsend
发明人： Stephen L. Van Seters , Ryan T. Ross , Leonard Schwartz , David C. Ready , John A. Flanders , Robert P. Ryan , William D. Townsend
IPC分类号： H04L12/46 , H04L12/28
CPC分类号： H04L12/4645
摘要： Logic circuits are employed in a telecommunications bridge/router device to examine a received frame to determine which VLAN, if any, the frame is associated with. The protocol type, receive port identification, and receive VLAN tag are employed to determine the transmit port identification and transmit VLAN tag. A predefined table indicates which ports within the bridge/router are associated with the VLAN. The frame is excluded from transmission through the ports that are not associated with members of the respective the VLAN.
摘要翻译：电信桥/路由器设备中使用逻辑电路来检查接收到的帧以确定该帧与哪个VLAN相关联。采用协议类型，接收端口标识和接收VLAN标签来确定发送端口标识和发送VLAN标签。一个预定义的表格指出了网桥/路由器中哪些端口与VLAN相关联。通过不与相应VLAN的成员关联的端口将该帧排除在传输之外。

5. 发明授权

US5825774A Packet characterization using code vectors 失效
标题翻译：使用代码向量的数据包表征
公开(公告)号：US5825774A
公开(公告)日：1998-10-20
申请号：US501484
申请日：1995-07-12
申请人： David C. Ready , Stephen L. Van Seters , John A. Flanders
发明人： David C. Ready , Stephen L. Van Seters , John A. Flanders
IPC分类号： H04L12/56 , H04L12/46
CPC分类号： H04L49/9063 , H04L49/90 , H04L69/08 , H04L69/12 , H04L69/161 , H04L69/16 , Y10S370/906 , Y10S370/91 , Y10S370/911
摘要： A method and apparatus for increasing the throughput of a communications internetworking device. The method involves the generating, by internetworking device hardware, of a predetermined code vector in response to the current state of the communications internetworking device and information contained in a data packet received by the internetworking device. In response to the hardware generated predetermined code vector, a predetermined software routine is executed by a microprocessor in the internetworking device which controls how the data packet is to be transmitted to its destination. By using hardware to generate the code vector, time is saved over having software determine how the internetworking device is to handle the data packet.
摘要翻译：一种用于增加通信网络互联设备的吞吐量的方法和装置。该方法涉及通过互联网络设备硬件产生响应于通信互联网络设备的当前状态和包含在由互联网络设备接收的数据分组中的信息的预定码矢量。响应于硬件产生的预定代码向量，预定的软件程序由控制如何将数据分组传输到其目的地的互联网络设备中的微处理器执行。通过使用硬件来生成代码向量，通过使软件确定互联网络设备如何处理数据包来节省时间。

6. 发明授权

US5748633A Method and apparatus for the concurrent reception and transmission of packets in a communications internetworking device 失效
标题翻译：用于在通信互联网络设备中并发地接收和传输分组的方法和装置
公开(公告)号：US5748633A
公开(公告)日：1998-05-05
申请号：US501588
申请日：1995-07-12
申请人： Christopher P. Lawler , David C. Ready
发明人： Christopher P. Lawler , David C. Ready
IPC分类号： G06F13/12 , H04L12/56 , H04L12/46
CPC分类号： H04L49/9089 , G06F13/128 , H04L49/90 , H04L49/9042
摘要： A method and apparatus for increasing the throughput of a communications internetworking device using concurrent reception and transmission of data packets. The method involves the beginning of a retransmission by the communications internetworking device, to a destination network, of a frame undergoing reception by the communications internetworking device, from a source network, prior to the completion the reception of the frame from the source network by the communications internetworking device.
摘要翻译：一种用于增加使用数据分组的并发接收和传输的通信互联网络设备的吞吐量的方法和装置。该方法包括在完成从源网络接收帧之前由源网络在通信互联网络设备向目的地网络开始由通信互联网络设备进行接收的帧的重传通信互联网络设备。

7. 发明授权

US5651002A Internetworking device with enhanced packet header translation and memory 失效
标题翻译：具有增强的数据包报头转换和内存的互联设备
公开(公告)号：US5651002A
公开(公告)日：1997-07-22
申请号：US502087
申请日：1995-07-12
申请人： Stephen L. Van Seters , Christopher P. Lawler , David C. Ready
发明人： Stephen L. Van Seters , Christopher P. Lawler , David C. Ready
IPC分类号： H04L12/46 , H04L12/56 , H04L29/06 , H04J3/26
CPC分类号： H04L12/4625 , H04L49/90 , H04L69/18
摘要： An internetworking device providing enhanced packet header translation for translating the format of a header associated with a source network into a header format associated with a destination network of a different type than the source network. The device includes a memory for storing an address portion of a received packet header in a first block of buffer locations and the remainder of the received packet in a second block of buffer locations, spaced from the first block of buffer locations by a gap. The gap permits supplemental header information to be written into the buffer when necessary for translation. The device further includes a split memory, having an SRAM portion and a DRAM portion allocated to each buffer, with at least the address portion of a received packet and the gap located in the SRAM portion, so as to optimize the translation performance of the device.
摘要翻译：提供增强的分组报头转换的互联网络设备，用于将与源网络相关联的报头的格式转换为与源网络不同类型的目的地网络相关联的报头格式。该设备包括存储器，用于将缓冲器位置的第一块中接收到的分组报头的地址部分存储，并且将所接收的分组的剩余部分存储在与第一缓冲器位置块间隔开的第二缓冲器位置块中。间隙允许补充标题信息在需要翻译时写入缓冲区。该装置还包括具有分配给每个缓冲器的SRAM部分和DRAM部分的分离存储器，至少具有接收分组的地址部分和位于SRAM部分中的间隙，以便优化设备的转换性能。

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