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1. 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。

2. 发明授权

US06954427B1 Method and apparatus for performing priority-based admission control 有权
标题翻译：用于执行基于优先级的准入控制的方法和装置
公开(公告)号：US06954427B1
公开(公告)日：2005-10-11
申请号：US09818621
申请日：2001-03-28
申请人： Somnath Viswanath , Gopal S. Krishna , Peter Ka-Fai Chow , Bahadir Erimli
发明人： Somnath Viswanath , Gopal S. Krishna , Peter Ka-Fai Chow , Bahadir Erimli
IPC分类号： H04L12/26 , H04L12/56
CPC分类号： H04L47/10 , H04L47/6215 , H04L49/901 , H04L49/9073
摘要： A network device that controls the communication of data frames between stations includes a memory that stores frame pointers that point to addresses in an external memory. The data frames are stored in the external memory while the network device generates frame forwarding information for the respective data frames. The network device divides the available frame pointers into a number of categories corresponding to priorities associated with the data frames. When a frame is received at the network device, frame processing logic determines the priority of the data frame and checks whether a frame pointer corresponding to that particular priority is available. If no frame pointer corresponding to that priority is available, the multiport switch drops the data frame.
摘要翻译：控制站间数据帧通信的网络设备包括存储指向外部存储器中的地址的帧指针的存储器。数据帧存储在外部存储器中，而网络设备生成各个数据帧的帧转发信息。网络设备将可用帧指针划分成与数据帧相关联的优先级对应的多个类别。当在网络设备处接收到帧时，帧处理逻辑确定数据帧的优先级，并检查对应于该特定优先级的帧指针是否可用。如果没有与该优先级相对应的帧指针可用，则多端口交换机将丢弃数据帧。

3. 发明授权

US06839351B1 Parallel packet lookup in a packet-switched network 有权
标题翻译：分组交换网络中的并行数据包查找
公开(公告)号：US06839351B1
公开(公告)日：2005-01-04
申请号：US09818135
申请日：2001-03-28
申请人： Peter Ka-Fai Chow , Bahadir Erimli , Somnath Viswanath , Gopal S. Krishna
发明人： Peter Ka-Fai Chow , Bahadir Erimli , Somnath Viswanath , Gopal S. Krishna
IPC分类号： H04L12/28 , H04L12/44 , H04L12/56
CPC分类号： H04L49/3009 , H04L12/44 , H04L49/354
摘要： A multiport network device includes output ports, internal rules checking logic, a port filter, and input ports. The input ports receive data frames and transfer the data frames to the internal rules checking logic and the port filter. The internal rules checking logic determines the appropriate output ports for the frame. At potentially the same time, the port filter determines priority information for the frame. The port filter informs the internal rules checking logic when it has completed determining the priority information by transmitting an end-of-frame signal to the internal rules checking logic. In response, if the internal rules checking logic has completed determining the output ports for the frame, it assembles a frame descriptor corresponding to the frame and transmits the frame descriptor to the appropriate output port(s).
摘要翻译：多端口网络设备包括输出端口，内部规则检查逻辑，端口过滤器和输入端口。输入端口接收数据帧，并将数据帧传输到内部规则检查逻辑和端口过滤器。内部规则检查逻辑确定帧的适当输出端口。在可能的同时，端口过滤器确定帧的优先级信息。端口过滤器通过将帧内信号发送到内部规则检查逻辑完成确定优先级信息后，通知内部规则检查逻辑。作为响应，如果内部规则检查逻辑已经完成确定帧的输出端口，则它组装与帧相对应的帧描述符，并将帧描述符发送到适当的输出端口。

4. 发明授权

US06990114B1 System and method for deciding outgoing priority for data frames 有权
标题翻译：确定数据帧传出优先级的系统和方法
公开(公告)号：US06990114B1
公开(公告)日：2006-01-24
申请号：US09816337
申请日：2001-03-26
申请人： Bahadir Erimli , Peter Ka-Fai Chow , Yatin R. Acharya , Shr-Jie Tzeng
发明人： Bahadir Erimli , Peter Ka-Fai Chow , Yatin R. Acharya , Shr-Jie Tzeng
IPC分类号： H04L12/56
CPC分类号： H04L47/10 , H04L47/2433 , H04L47/2441
摘要： A network device includes a port filter, a first logic device, and a second logic device. The port filter receives a data frame and generates first data relating to the data frame. The first logic device generates second data for the received data frame. The second logic device receives the first data and the second data, determines whether the first data contains a valid first priority value, and assigns the valid first priority value to the data frame when the first data contains the valid first priority value. When the first data does not contain a valid first priority value, the second logic device determines whether the second data contains a valid second priority value, and assigns the valid second priority value to the data frame when the second data contains the valid second priority value.
摘要翻译：网络设备包括端口过滤器，第一逻辑设备和第二逻辑设备。端口滤波器接收数据帧并产生与数据帧有关的第一数据。第一逻辑设备生成接收到的数据帧的第二数据。第二逻辑设备接收第一数据和第二数据，确定第一数据是否包含有效的第一优先级值，并且当第一数据包含有效的第一优先级值时，将有效的第一优先级值分配给数据帧。当第一数据不包含有效的第一优先级值时，第二逻辑装置确定第二数据是否包含有效的第二优先级值，并且当第二数据包含有效的第二优先级值时，将有效的第二优先级值分配给数据帧。

5. 发明授权

US06963571B1 Systems and methods for merging packet lookup results 失效
标题翻译：用于合并数据包查找结果的系统和方法
公开(公告)号：US06963571B1
公开(公告)日：2005-11-08
申请号：US09797690
申请日：2001-03-05
申请人： Somnath Viswanath , Bahadir Erimli , Peter Ka-Fai Chow , Yatin R. Acharya
发明人： Somnath Viswanath , Bahadir Erimli , Peter Ka-Fai Chow , Yatin R. Acharya
IPC分类号： H04L12/54 , H04L12/56 , H04I12/28
CPC分类号： H04L49/351 , H04L49/15 , H04L49/205
摘要： A multiport network device includes output port logic, priority logic, a memory, and memory logic. The output port logic generates output port data that identifies output ports to transmit received packets. The priority logic generates priority data that identifies priorities of the received packets. The memory stores the output port data from the output port logic and the priority data from the priority logic. The memory logic receives priority data relating to one of the received packets from the output port logic, determines whether the memory stores output port data relating to the packet, ignores the received priority data when the memory stores no output port data relating to the packet, and when the memory stores output port data relating to the packet, transmits the received priority data and the stored output port data to the identified output port.
摘要翻译：多端口网络设备包括输出端口逻辑，优先级逻辑，存储器和存储器逻辑。输出端口逻辑产生识别输出端口以发送接收到的数据包的输出端口数据。优先级逻辑生成识别接收到的分组的优先级的优先级数据。存储器存储来自输出端口逻辑的输出端口数据和来自优先级逻辑的优先级数据。存储器逻辑从输出端口逻辑接收与接收到的分组之一相关的优先级数据，确定存储器是否存储与分组相关的输出端口数据，当存储器不存储与分组相关的输出端口数据时，忽略接收到的优先级数据，并且当存储器存储与分组相关的输出端口数据时，将接收到的优先级数据和存储的输出端口数据发送到所识别的输出端口。

6. 发明授权

US07031305B1 Apparatus and method for programmable memory access slot assignment 有权
标题翻译：可编程存储器存取槽分配的装置和方法
公开(公告)号：US07031305B1
公开(公告)日：2006-04-18
申请号：US09317156
申请日：1999-05-24
申请人： Ching Yu , Xiaohua Zhuang , Bahadir Erimli , John M. Chiang , Shashank Merchant , Robert Williams , Edward Yang , Chandan Egbert , Vallath Nandakumar , Ian Lam , Eric Tsin-Ho Leung
发明人： Ching Yu , Xiaohua Zhuang , Bahadir Erimli , John M. Chiang , Shashank Merchant , Robert Williams , Edward Yang , Chandan Egbert , Vallath Nandakumar , Ian Lam , Eric Tsin-Ho Leung
IPC分类号： H04L12/28
CPC分类号： H04L49/351 , H04L49/205 , H04L49/3027 , H04L49/354
摘要： A network switch having switch ports for full-duplex communication of data packets with respective network nodes according to Ethernet (IEEE 802.3) protocol that flexibly assigns memory access slots to access an external memory according to programmable information. A scheduler within an external memory interface assigns the memory access slots to the respective network switch ports according to a programmed sequence written into an assignment table memory from an external programmable data storage device.
摘要翻译：根据以太网（IEEE 802.3）协议，具有根据可编程信息灵活地分配存储器访问时隙以访问外部存储器的数据分组与各网络节点全双工通信的交换机端口的网络交换机。外部存储器接口中的调度器根据从外部可编程数据存储设备写入指配表存储器的编程序列，将存储器访问时隙分配给相应的网络交换机端口。

7. 发明授权

US06501734B1 Apparatus and method in a network switch for dynamically assigning memory interface slots between gigabit port and expansion port 有权
标题翻译：网络交换机中的装置和方法，用于在千兆端口和扩展端口之间动态分配存储器接口槽
公开(公告)号：US06501734B1
公开(公告)日：2002-12-31
申请号：US09317150
申请日：1999-05-24
申请人： Ching Yu , Xiaohua Zhuang , Bahadir Erimli , John M. Chiang , Shashank Merchant , Robert Williams , Edward Yang , Chandan Egbert , Vallath Nandakumar , Ian Lam , Eric Tsin-Ho Leung
发明人： Ching Yu , Xiaohua Zhuang , Bahadir Erimli , John M. Chiang , Shashank Merchant , Robert Williams , Edward Yang , Chandan Egbert , Vallath Nandakumar , Ian Lam , Eric Tsin-Ho Leung
IPC分类号： H04J116
CPC分类号： H04L49/103 , H04L49/254 , H04L49/3027 , H04L49/351 , H04L49/352 , H04L49/354 , H04L49/90 , H04L49/901
摘要： A network switch having switch ports for full-duplex communication of data packets with respective network nodes according to Ethernet (IEEE 802.3) protocol dynamically allocates external memory bandwidth slots between high data rate ports. An external memory interface determines if a high data rate port makes a request for a bandwidth slot and grants the request if made. The slot is taken from a selected group which is a subset of the total number of slots. If a request for the slot is not made, the external memory interface assigns the slot to another high data rate port. Lower data rate ports in the network switch are assigned fixed slots from those slots not from within the selected group of slots. The dynamic allocation of bandwidth slots between the high data rate port enables the efficient use of limited memory bandwidth resources.
摘要翻译：具有根据以太网（IEEE 802.3）协议的具有各个网络节点的数据分组全双工通信的交换机端口的网络交换机动态地在高数据速率端口之间分配外部存储器带宽时隙。外部存储器接口确定高数据速率端口是否对带宽槽进行请求，如果发出请求则确定该请求。时隙是从所选择的组中获取的，该组是总时隙数的子集。如果没有对插槽进行请求，则外部存储器接口将插槽分配给另一个高数据速率端口。网络交换机中的较低数据速率端口从这些时隙中分配固定时隙，而不是在所选择的时隙组内。高数据速率端口之间的带宽时隙的动态分配使得能够有效地利用有限的存储器带宽资源。

8. 发明授权

US06442137B1 Apparatus and method in a network switch for swapping memory access slots between gigabit port and expansion port 失效
标题翻译：用于交换千兆端口和扩展端口之间的存储器访问槽的网络交换机中的装置和方法
公开(公告)号：US06442137B1
公开(公告)日：2002-08-27
申请号：US09317143
申请日：1999-05-24
申请人： Ching Yu , Xiaohua Zhuang , Bahadir Erimli , John M. Chiang , Shashank Merchant , Robert Williams , Edward Yang , Chandan Egbert , Vallath Nandakumar , Ian Lam , Eric Tsin-Ho Leung
发明人： Ching Yu , Xiaohua Zhuang , Bahadir Erimli , John M. Chiang , Shashank Merchant , Robert Williams , Edward Yang , Chandan Egbert , Vallath Nandakumar , Ian Lam , Eric Tsin-Ho Leung
IPC分类号： H04L522
CPC分类号： H04L49/901 , H04L49/103 , H04L49/3027 , H04L49/351 , H04L49/352 , H04L49/90 , H04L49/9031 , H04L49/9078
摘要： A network switch having switch ports for full-duplex communication of data packets with respective network nodes according to Ethernet (IEEE 802.3) protocol that allocates a prescribed number of external memory bandwidth slots between high data rate ports based on the compared amount of network traffic on the respective ports. A scheduler within an external memory interface initially assigns memory access slots to the respective high data rate ports according to a prescribed sequence. If the scheduler subsequently detects that the network data traffic on a port having less slots is higher than the traffic on a port having more slots, the slots are swapped between the high data rate ports. Additionally, a clock multiplexer in one of the high data rate ports adjusts the data rate of the port dependent upon the number of slots assigned to that port. The swapping of bandwidth slots between the high data rate ports along with the adjustment of the port clock rate enables the efficient use of limited memory bandwidth resources.
摘要翻译：网络交换机具有用于根据以太网（IEEE 802.3）协议的具有各网络节点的数据分组全双工通信的交换机端口，该协议基于网络流量的比较量在高数据速率端口之间分配规定数量的外部存储器带宽时隙各个端口。外部存储器接口中的调度器根据规定的顺序，初始地将存储器访问时隙分配给相应的高数据速率端口。如果调度器随后检测到具有较少时隙的端口上的网络数据流量高于具有更多时隙的端口上的流量，则这些时隙在高数据速率端口之间交换。此外，高数据速率端口之一中的时钟多路复用器根据分配给该端口的时隙数来调整端口的数据速率。在高数据速率端口之间交换带宽时隙以及端口时钟速率的调整使得能够有效地使用有限的存储器带宽资源。

9. 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。

10. 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。

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