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1. 发明授权

US6084878A External rules checker interface 失效
标题翻译：外部规则检查器界面
公开(公告)号：US6084878A
公开(公告)日：2000-07-04
申请号：US993715
申请日：1997-12-18
申请人： Ian Crayford , Denise Kerstein , Peter Ka-Fai Chow , Chandan Egbert , Thomas J. Runaldue
发明人： Ian Crayford , Denise Kerstein , Peter Ka-Fai Chow , Chandan Egbert , Thomas J. Runaldue
IPC分类号： H04L12/46 , H04L12/56 , H04L12/28 , H04L12/54
CPC分类号： H04L12/4641 , H04L49/25 , H04L49/3027 , H04L49/351 , H04L49/354
摘要： An interface located on a network switch transmits header information to an external device that makes data forwarding decisions. The interface receives and transmits header information that includes the source and destination address of the data. The external device generates data forwarding information and transmits the information back to the switch via the interface device. The network switch uses the information obtained via the interface and forwards the data packets to the appropriate destination.
摘要翻译：位于网络交换机上的接口将报头信息发送到进行数据转发决策的外部设备。该接口接收并发送包括数据的源地址和目标地址的标题信息。外部设备生成数据转发信息，并通过接口设备将信息发送回交换机。网络交换机使用通过接口获得的信息，并将数据包转发到适当的目的地。

2. 发明授权

US6084877A Network switch port configured for generating an index key for a network switch routing table using a programmable hash function 失效
标题翻译：网络交换机端口被配置为使用可编程散列函数生成用于网络交换机路由表的索引密钥
公开(公告)号：US6084877A
公开(公告)日：2000-07-04
申请号：US992797
申请日：1997-12-18
申请人： Chandan Egbert , Peter Ka-Fai Chow , Denise Kerstein
发明人： Chandan Egbert , Peter Ka-Fai Chow , Denise Kerstein
IPC分类号： H04L12/56 , H04L12/28
CPC分类号： H04L49/309 , H04L45/745 , H04L49/3009 , H04L49/103 , H04L49/3054 , H04L49/351 , H04L49/40
摘要： A network switch configured for switching data packets across multiple switch ports includes in each network switch port a hash key generator configured to generate a hash key for each network address in a received data packet. Each data packet received by a network switch port includes a source address and a destination address according to IEEE 802.3 protocol. The hash key generator in the corresponding network switch port generates the hash key for the source and destination addresses as the data packet is received by the network switch port, minimizing processing latency in generating the hash key. The hash keys are forwarded to an address table configured to include a programmable number of bin entries, where each bin entry is configured to reference a plurality of address table entries storing the switching logic information for respective network addresses. The hash key, which references a selected one of the bin entries, is used to obtain the switching logic for the corresponding address by accessing the appropriate table entry referenced by the selected bin entry.
摘要翻译：配置用于跨多个交换机端口切换数据分组的网络交换机包括：在每个网络交换机端口中，散列密钥发生器被配置为为接收的数据分组中的每个网络地址生成散列密钥。由网络交换机端口接收的每个数据分组包括根据IEEE 802.3协议的源地址和目的地址。相应的网络交换机端口中的散列密钥生成器在数据包被网络交换机端口接收时生成源和目的地址的散列密钥，从而最小化生成哈希密钥的处理延迟。散列密钥被转发到配置成包括可编程数量的bin条目的地址表，其中每个bin条目被配置为引用存储相应网络地址的切换逻辑信息的多个地址表条目。引用所选择的一个bin条目的哈希密钥用于通过访问由所选择的bin条目引用的适当的表条目来获得相应地址的切换逻辑。

3. 发明授权

US6167054A Method and apparatus providing programmable thresholds for full-duplex flow control in a network switch 失效
标题翻译：为网络交换机中的全双工流量控制提供可编程阈值的方法和装置
公开(公告)号：US6167054A
公开(公告)日：2000-12-26
申请号：US992913
申请日：1997-12-18
申请人： Philip Simmons , Bahadir Erimli , Jinqlih Sang , Peter Ka-Fai Chow , Ian Crayford , Jayant Kadambi , Denise Kerstein , Thomas Jefferson Runaldue
发明人： Philip Simmons , Bahadir Erimli , Jinqlih Sang , Peter Ka-Fai Chow , Ian Crayford , Jayant Kadambi , Denise Kerstein , Thomas Jefferson Runaldue
IPC分类号： H04L13/08 , G06F11/26 , G06F12/00 , G06F13/00 , G06F13/10 , G06F13/16 , G06F13/24 , G06F15/00 , G06F15/16 , G08B5/00 , G11C11/412 , H04B7/14 , H04J3/02 , H04J3/12 , H04J3/22 , H04J3/24 , H04L12/18 , H04L12/24 , H04L12/28 , H04L12/413 , H04L12/44 , H04L12/46 , H04L12/50 , H04L12/54 , H04L12/66 , H04L12/861 , H04L12/863 , H04L12/879 , H04L12/931 , H04L12/933 , H04L12/935 , H04L12/937 , H04L12/939 , H04L12/947 , H04Q3/545 , H04Q11/00
CPC分类号： H04L49/3009 , G06F13/1605 , G06F13/24 , G11C11/412 , H04L12/1863 , H04L12/4641 , H04L12/4645 , H04L12/467 , H04L41/0213 , H04L47/50 , H04L47/6225 , H04L49/103 , H04L49/201 , H04L49/25 , H04L49/255 , H04L49/30 , H04L49/3027 , H04L49/3054 , H04L49/351 , H04L49/354 , H04L49/40 , H04L49/50 , H04L49/552 , H04L49/555 , H04L49/90 , H04L49/901 , H04L49/9047 , H04L49/9063 , H04L49/9073 , H04L49/9078 , H04L49/9084 , H04Q3/54591 , H04Q2213/1316 , H04Q2213/13162
摘要： A network having a shared memory architecture for storing data frames has a set of programmable thresholds that specify when flow control should be initiated on full-duplex network ports. The network switch includes a queue for storing free frame pointers that specify available memory locations in an external memory for storing data frames received from a network station. The network switch takes a frame pointer from a free buffer queue for each received data frame, and stores the received data frame in the location in external memory specified by the frame pointer while a decision making engine within the switch determines the appropriate destination ports. Flow control is initiated based on the number of available frame pointers by transmitting a PAUSE frame having a selected PAUSE interval to a transmitting network station. Specifically, a full-duplex port will output a PAUSE frame having a short, medium, or long programmed pause interval if the free buffer pool of available frame pointers falls below a high, medium, or low programmable threshold, respectively. The switch thus provides flexibility in generating variable-length PAUSE control frames to minimize wasting network bandwidth.
摘要翻译：具有用于存储数据帧的共享存储器架构的网络具有一组可编程阈值，其指定何时应当在全双工网络端口上启动流量控制。网络交换机包括用于存储空闲帧指针的队列，其指定用于存储从网络站接收的数据帧的外部存储器中的可用存储器位置。网络交换机从每个接收到的数据帧的空闲缓冲器队列中获取帧指针，并且将接收到的数据帧存储在由帧指针指定的外部存储器中的位置，同时交换机内的决策引擎确定适当的目的地端口。通过将具有所选暂停间隔的暂停帧发送到发射网络站，基于可用帧指针的数量启动流控制。具体来说，如果可用帧指针的空闲缓冲池分别低于高，中或低可编程阈值，则全双工端口将输出具有短，中或长编程暂停间隔的暂停帧。因此，交换机可以灵活地生成可变长度的PAUSE控制帧，以最大限度地减少浪费的网络带宽。

4. 发明授权

US07502366B1 Arrangement in a network switch for prioritizing data frames based on user-defined frame attributes 有权
标题翻译：网络交换机中的布置，用于基于用户定义的帧属性对数据帧进行优先级排序
公开(公告)号：US07502366B1
公开(公告)日：2009-03-10
申请号：US09576021
申请日：2000-05-23
申请人： Bahadir Erimli , Gopal S. Krishna , Chandan Egbert , Peter Ka-Fai Chow , Mrudula Kanuri , Shr-Jie Tzeng , Somnath Viswanath , Xiaohua Zhuang
发明人： Bahadir Erimli , Gopal S. Krishna , Chandan Egbert , Peter Ka-Fai Chow , Mrudula Kanuri , Shr-Jie Tzeng , Somnath Viswanath , Xiaohua Zhuang
IPC分类号： H04L12/28
CPC分类号： H04L47/10 , H04L47/13 , H04L47/20
摘要： A network switch includes network switch ports, each including a port filter configured for detecting user-selected attributes from a received layer 2 type data frame. Each port filter, upon detecting a user-selected attribute in a received layer 2 type data frame, sends a signal to a switching module indicating the determined presence of the user-selected attribute, enabling the switching module to generate a switching decision based on the corresponding user-selected attribute and based on a corresponding user-defined switching policy. The switching policy may specify a priority class, or a guaranteed quality of service (e.g., a guaranteed bandwidth), ensuring that the received layer 2 type data frame receives the appropriate switching support. The user-selected attributes for the port filter and the user-defined switching policy for the switching module are programmed by a host processor. Hence, the integrated network switch is able to perform advanced switching operations for layer 2 type data packets to ensure quality of service requirements, independent of priority information specified in the layer 2 type data packets, based on the user-selected attributes in the layer 2 type data packets and the user-defined switching policies established for the switching module.
摘要翻译：网络交换机包括网络交换机端口，每个端口包括被配置为从接收到的层2型数据帧中检测用户选择的属性的端口过滤器。每个端口滤波器在检测到接收到的层2类型数据帧中的用户选择的属性时，向交换模块发送指示所确定的用户选择属性的存在的信号，使切换模块能够基于相应的用户选择的属性并基于相应的用户定义的交换策略。切换策略可以指定优先级等级或保证服务质量（例如，保证带宽），确保接收到的第2层类型的数据帧接收适当的切换支持。用于端口过滤器的用户选择的属性和用于切换模块的用户定义的切换策略由主处理器编程。因此，综合网络交换机能够根据第2层用户选择的属性，对第2层类型的数据包执行高级交换操作，以确保与第2类数据包中指定的优先级信息无关的服务质量要求类型数据包和为交换模块建立的用户定义的交换策略。

5. 发明授权

US07295562B1 Systems and methods for expediting the identification of priority information for received packets 有权
标题翻译：用于加快对接收到的数据包的优先级信息的识别的系统和方法
公开(公告)号：US07295562B1
公开(公告)日：2007-11-13
申请号：US09816333
申请日：2001-03-26
申请人： Yatin R. Acharya , Bahadir Erimli , Peter Ka-Fai Chow
发明人： Yatin R. Acharya , Bahadir Erimli , Peter Ka-Fai Chow
IPC分类号： H04L12/28 , H04L12/56
CPC分类号： H04L47/10 , H04L41/0213 , H04L43/00 , H04L43/08 , H04L47/2408 , H04L47/32
摘要： A network device identifies priority level information for data frames it receives. The network device includes input ports, a memory, an action generator, and a port vector queue. The input ports receive the data frames. Each of the received data frames specifies one or more classes of service. The memory stores priority level information corresponding to each of the classes of service. The action generator generates an action tag for each of the received data frames. The port vector queue uses the action tag from the action generator for each of the received data frames to access the memory to identify the priority level information associated with the received data frame.
摘要翻译：网络设备识别其接收的数据帧的优先级信息。网络设备包括输入端口，存储器，动作生成器和端口向量队列。输入端口接收数据帧。每个接收到的数据帧指定一个或多个服务类别。存储器存储对应于每个服务类别的优先级信息。动作生成器为每个接收到的数据帧生成动作标签。端口向量队列使用动作生成器中的每个接收数据帧的动作标签访问存储器，以识别与接收的数据帧相关联的优先级信息。

6. 发明授权

US06807183B1 Arrangement for reading a prescribed location of a FIFO buffer in a network switch port 有权
标题翻译：用于读取网络交换机端口中FIFO缓冲区的指定位置的布置
公开(公告)号：US06807183B1
公开(公告)日：2004-10-19
申请号：US09566732
申请日：2000-05-09
申请人： Peter Ka-Fai Chow , Shr-Jie Tzeng
发明人： Peter Ka-Fai Chow , Shr-Jie Tzeng
IPC分类号： H04L1256
CPC分类号： H04L49/604 , H04L49/3018
摘要： A network switch, configured for performing layer 2 and layer 3 switching in an Ethernet (IEEE 802.3) network without blocking of incoming data packets, includes a network switch port having a filter (i.e., a packet classifier module) configured for evaluating an incoming data packet on an instantaneous basis. The filter performs simultaneous comparisons between the incoming data stream of the data packet and multiple templates configured for identifying respective data protocols. Each template is composed of a plurality of min terms, wherein each min term specifies a prescribed comparison operation within a selected data byte of the incoming data packet. The packet classifier includes a separate FIFO for storing the payload of the layer 2 data frame (e.g., the IP packet), and buffer read logic that enables the packet classifier to read selected portions of the payload as it is received by the network switch port. The multiple simultaneous comparisons enable the network switch to perform layer 3 switching for 100 Mbps and gigabit networks without blocking in the network switch.
摘要翻译：配置用于在以太网（IEEE 802.3）网络中执行层2和层3切换而不阻塞传入数据分组的网络交换机包括网络交换机端口，该网络交换机端口具有被配置用于评估输入数据的过滤器（即分组分类器模块）数据包立即进行。该过滤器执行数据包的输入数据流和配置用于识别相应数据协议的多个模板之间的同时比较。每个模板由多个最小项组成，其中每个最小项指定输入数据分组的所选数据字节内的规定比较操作。分组分类器包括用于存储第2层数据帧（例如，IP分组）的有效载荷的单独FIFO，以及使得分组分类器能够读取网络交换机端口接收到的有效负载的所选部分的缓冲器读取逻辑。多次同步比较使得网络交换机能够在网络交换机中对100 Mbps和千兆网络执行第3层交换，而不会阻塞。

7. 发明授权

US06718379B1 System and method for network management of local area networks having non-blocking network switches configured for switching data packets between subnetworks based on management policies 有权
标题翻译：具有非阻塞网络交换机的局域网的网络管理系统和方法，用于基于管理策略在子网间切换数据包
公开(公告)号：US06718379B1
公开(公告)日：2004-04-06
申请号：US09590685
申请日：2000-06-09
申请人： Gopal S. Krishna , Peter Ka-Fai Chow , Somnath Viswanath , Shr-Jie Tzeng , Mrudula Kanuri
发明人： Gopal S. Krishna , Peter Ka-Fai Chow , Somnath Viswanath , Shr-Jie Tzeng , Mrudula Kanuri
IPC分类号： G06F15173
CPC分类号： H04L41/5022 , H04L49/351 , H04L63/102 , H04L63/12
摘要： A centralized policy server sends policy messages, that describe network management policy, to network switches. Each policy message includes a packet attribute that enables a network switch to uniquely identify a received data packet, and either a priority level or network switch action that describes the switching operation to be performed by the network switch. The network switches are configured for implementing the network management policy by storing switching actions for prescribed data packets, and templates that specify frame data parameters for identifying the prescribed data packets. Each network switch, configured for performing layer 2 and layer 3 switching in an Ethernet (IEEE 802.3) network without blocking of incoming data packets, includes in each network switch port a packet classifier module configured for classifying a received data packet based on a template generated based on the policy messages. In particular, the network switch stores a plurality of user-programmable templates, each configured for identifying a corresponding class of data packet.
摘要翻译：集中式策略服务器向网络交换机发送描述网络管理策略的策略消息。每个策略消息包括允许网络交换机唯一地标识接收到的数据分组的分组属性，以及描述要由网络交换机执行的切换操作的优先级或网络交换机动作。网络交换机被配置为通过存储规定数据分组的切换动作来实现网络管理策略，以及指定用于识别规定数据分组的帧数据参数的模板。每个网络交换机被配置为在以太网（IEEE 802.3）网络中执行层2和层3交换而不阻塞传入数据分组，在每个网络交换机端口中包括分组分类器模块，其被配置用于基于生成的模板对接收到的数据分组进行分类根据政策信息。特别地，网络交换机存储多个用户可编程模板，每个模板被配置用于识别相应类别的数据分组。

8. 发明授权

US6130891A Integrated multiport switch having management information base (MIB) interface temporary storage 失效
标题翻译：具有管理信息库（MIB）接口临时存储的集成多端口交换机
公开(公告)号：US6130891A
公开(公告)日：2000-10-10
申请号：US992817
申请日：1997-12-18
申请人： Ian Lam , Peter Ka-Fai Chow
发明人： Ian Lam , Peter Ka-Fai Chow
IPC分类号： G06F5/06 , H04L12/18 , H04L12/24 , H04L12/46 , H04L12/56 , H04L29/06 , H04Q3/545 , H04L12/28
CPC分类号： H04L49/9073 , G06F5/06 , H04L41/0213 , H04L49/255 , H04L49/90 , H04L49/901 , H04L49/9078 , H04L69/26 , H04Q3/54591 , H04L12/1863 , H04L49/103 , H04L49/201 , H04L49/205 , H04L49/3009 , H04L49/351 , H04L49/354 , H04Q2213/1316 , H04Q2213/13162
摘要： An integrated multiport switch having an interface connected between the MAC of each port and a MIB report bus, whereby MIB reports for the plurality of switch ports are transmitted individually to a switch MIB engine, fed by the MIB report bus, on a time shared basis. The interface prioritizes transmission of the MIB reports to the MIB engine in accordance with the transmission characteristics associated with the respective ports. A FIFO storage buffer in interface temporarily holds MIB report data, received from lower priority ports on a time-slot allotted sequence synchronized to a clock signal, during periods in which MIB report data from higher priority ports are given preference for output to the MIB report bus.
摘要翻译：一种具有连接在每个端口的MAC和MIB报告总线之间的接口的集成多端口交换机，其中多个交换机端口的MIB报告被分别传输到由MIB报告总线馈送的交换机MIB引擎，时间共享。该接口根据与相应端口相关联的传输特性将MIB报告的传输优先于MIB引擎。在接收来自较高优先级端口的MIB报告数据优先输出到MIB报告的期间，接口中的FIFO存储缓冲器临时保存从较低优先级端口接收的时间分配序列与时钟信号同步的MIB报告数据总线。

9. 发明授权

US06128310A Multiport data network switch having a random number generator shared by multiple media access controllers 失效
标题翻译：具有由多个媒体接入控制器共享的随机数发生器的多端口数据网络交换机
公开(公告)号：US06128310A
公开(公告)日：2000-10-03
申请号：US993780
申请日：1997-12-18
申请人： Peter Ka-Fai Chow , Somnath Viswanath
发明人： Peter Ka-Fai Chow , Somnath Viswanath
IPC分类号： H04L13/08 , G06F11/26 , G06F12/00 , G06F13/00 , G06F13/10 , G06F13/16 , G06F13/24 , G06F15/00 , G06F15/16 , G08B5/00 , G11C11/412 , H04B7/14 , H04J3/02 , H04J3/12 , H04J3/22 , H04J3/24 , H04L12/18 , H04L12/24 , H04L12/28 , H04L12/413 , H04L12/44 , H04L12/46 , H04L12/50 , H04L12/54 , H04L12/66 , H04L12/861 , H04L12/863 , H04L12/879 , H04L12/931 , H04L12/933 , H04L12/935 , H04L12/937 , H04L12/939 , H04L12/947 , H04Q3/545 , H04Q11/00
CPC分类号： H04L49/3009 , G06F13/1605 , G06F13/24 , G11C11/412 , H04L12/4641 , H04L12/5693 , H04L41/0213 , H04L47/6225 , H04L49/103 , H04L49/201 , H04L49/25 , H04L49/255 , H04L49/30 , H04L49/3027 , H04L49/351 , H04L49/354 , H04L49/50 , H04L49/552 , H04L49/555 , H04L49/90 , H04L49/901 , H04L49/9047 , H04L49/9063 , H04L49/9073 , H04L49/9078 , H04L49/9084 , H04Q3/54591 , H04L12/1863 , H04L12/4645 , H04L12/467 , H04L49/3054 , H04L49/40 , H04Q2213/1316 , H04Q2213/13162
摘要： A multiport data network switch with each port associated with a media access controller (MAC) that is allocated a time slot in a repetitive sequence of clock cycles. A random number generator is coupled in common to each MAC to output a random number signal thereto. In response to a collision indicating signal, received at a port during a data transmission, the MAC outputs a retransmission retry signal in accordance with the random number signal that represents a number of delay cycles in which said transmission is delayed. The random number signal generator outputs an increasing multibit signal that is periodically reset. The MAC associated with each port is coupled in common to the shared random number signal generator and gains access thereto at a different respective time slot.
摘要翻译：多端口数据网络交换机，每个端口与媒体接入控制器（MAC）相关联，媒体接入控制器（MAC）以时钟周期的重复序列分配时隙。随机数发生器共同耦合到每个MAC以向其输出随机数信号。响应于在数据传输期间在端口接收到的冲突指示信号，MAC根据表示所述传输被延迟的延迟周期数的随机数信号输出重传重试信号。随机数信号发生器输出周期性复位的增加的多位信号。与每个端口相关联的MAC被共同耦合到共享随机数信号发生器，并在不同的相应时隙获得对其的访问。

10. 发明授权

US07016352B1 Address modification within a switching device in a packet-switched network 有权
标题翻译：在分组交换网络中的交换设备内的地址修改
公开(公告)号：US07016352B1
公开(公告)日：2006-03-21
申请号：US09814811
申请日：2001-03-23
申请人： Peter Ka-Fai Chow , Somnath Viswanath , Shr-Jie Tzeng
发明人： Peter Ka-Fai Chow , Somnath Viswanath , Shr-Jie Tzeng
IPC分类号： H04L12/28 , H04L12/56
CPC分类号： H04L49/604 , H04L49/205 , H04L49/3009
摘要： A multiport switching device includes an Internal Rules Checker (IRC) that determines forwarding addresses for packets received at the device. The determined forwarding addresses may include a new MAC destination address that is to substituted for the MAC destination address of the received packet. In one implementation, the new MAC destination address is transmitted from the IRC to the dequeuing logic by transmitting pairs of adjacent words through the switch output queues. In other implementations, the new MAC destination address is transmitted from the IRC to the dequeuing logic by transmitting an index field to the output queuing logic or by having the IRC write the new MAC destination address directly to memory.
摘要翻译：多端口交换设备包括内部规则检查器（IRC），其确定在设备处接收的分组的转发地址。所确定的转发地址可以包括将替换接收到的分组的MAC目的地地址的新的MAC目的地址。在一个实现中，新的MAC目的地地址通过交换机输出队列中的相邻字对来从IRC发送到出队逻辑。在其他实现中，通过向输出排队逻辑发送索引字段或通过使IRC将新的MAC目的地址直接写入存储器，将新的MAC目的地地址从IRC发送到出队逻辑。

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