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1. 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。

2. 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。

3. 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。

4. 发明授权

US6128654A Method and apparatus for transmitting multiple copies by replicating data identifiers 失效
标题翻译：通过复制数据标识符来发送多个副本的方法和装置
公开(公告)号：US6128654A
公开(公告)日：2000-10-03
申请号：US992924
申请日：1997-12-18
申请人： Thomas J. Runaldue , Bahadir Erimli , Chandan Egbert , Eric Tsin-ho Leung , Ian Crayford
发明人： Thomas J. Runaldue , Bahadir Erimli , Chandan Egbert , Eric Tsin-ho Leung , Ian Crayford
IPC分类号： G06F5/06 , H04L12/18 , H04L12/24 , H04L12/46 , H04L12/56 , H04L29/06 , H04Q3/545 , G06F15/16
CPC分类号： H04L49/901 , G06F5/06 , H04L41/0213 , H04L49/255 , H04L49/30 , H04L49/90 , H04L49/9047 , H04L49/9073 , H04L49/9078 , H04L69/26 , H04Q3/54591 , H04L49/3009 , H04L49/3027 , H04L49/354 , H04L49/45 , H04Q2213/1316 , H04Q2213/13162
摘要： A method and arrangement for transmitting multiple copies of a frame from a network switch in a packet switched network stores a single copy of the frame received at the switch into external memory. The frame is stored at a location in memory pointed to by a frame pointer. In queuing multiple transmissions of the stored frame in the switch, the frame pointer, and not the frame itself, is replicated and queued for transmission in the network switch.
摘要翻译：用于从分组交换网络中的网络交换机发送多个帧的副本的方法和装置将在交换机处接收到的帧的单个副本存储到外部存储器中。帧被存储在由帧指针指向的存储器中的位置。在对交换机中存储的帧的多次发送进行排队时，帧指针而不是帧本身被复制并排队等待在网络交换机中传输。

5. 发明授权

US6091707A Methods and apparatus for preventing under-flow conditions in a multiple-port switching device 失效
标题翻译：用于防止多端口开关装置中的欠流条件的方法和装置
公开(公告)号：US6091707A
公开(公告)日：2000-07-18
申请号：US993886
申请日：1997-12-18
申请人： Chandan Egbert , Bahadir Erimli , Eric Tsin-Ho Leung , Thomas J. Runaldue
发明人： Chandan Egbert , Bahadir Erimli , Eric Tsin-Ho Leung , Thomas J. Runaldue
IPC分类号： H04L12/56 , H04Q11/04 , H04L12/54
CPC分类号： H04L49/351 , H04L49/103 , H04L49/105 , H04L49/30 , H04Q11/0478 , H04L2012/5649 , H04L2012/5651 , H04L49/20 , H04L49/3009 , H04L49/3027 , H04L49/3054 , H04L49/354
摘要： An interface for use in a data forwarding device is connected between the receive ports and transmit ports of a device. The interface ensures that data being forwarded from a receive port to a transmit port has actually been received. The interface includes a queuing circuit and a de-queuing circuit. The queuing circuit receives data from the receive port, identifies the receive port, counts the data received, and buffers the data. The de-queuing circuit retrieves the buffered data at a scheduled time based on the receive port's mode, and forwards the data to a transmit port provided that the amount of data received by the queuing circuit is at least as great as the amount of data already forwarded by the de-queuing circuit plus a threshold safe level amount of data.
摘要翻译：用于数据转发设备的接口连接在设备的接收端口和发送端口之间。该接口确保从接收端口转发到发送端口的数据已被实际接收。接口包括排队电路和排队电路。排队电路从接收端口接收数据，识别接收端口，对接收到的数据进行计数，并缓冲数据。排队电路基于接收端口的模式在预定的时间检索缓冲的数据，并且将数据转发到发送端口，只要排队电路接收的数据量至少与数据量一样大由排队电路转发加上阈值安全级别的数据量。

6. 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。

7. 发明授权

US06658015B1 Multiport switch with plurality of logic engines for simultaneously processing different respective data frames 失效
标题翻译：具有多个逻辑引擎的多端口交换机，用于同时处理不同的相应数据帧
公开(公告)号：US06658015B1
公开(公告)日：2003-12-02
申请号：US09321623
申请日：1999-05-28
申请人： Shashank Merchant , Chandan Egbert , John M. Chiang
发明人： Shashank Merchant , Chandan Egbert , John M. Chiang
IPC分类号： H04L1256
CPC分类号： H04L49/103 , H04L49/3027 , H04L49/354 , H04L49/90
摘要： A network switch configured for switching data packets across multiple ports uses decision making device to generate frame forwarding information. The decision making device employs a modular architecture that enables data frames to be processed simultaneously and increase data throughput. The decision making device also includes a memory to store frame headers to minimize the signaling between the decision making device and the receive devices.
摘要翻译：配置为跨多个端口切换数据包的网络交换机使用决策设备生成帧转发信息。决策设备采用模块化架构，可以同时处理数据帧并提高数据吞吐量。决策设备还包括存储器以存储帧头以最小化决策设备和接收设备之间的信令。

8. 发明授权

US6115387A Method and apparatus for controlling initiation of transmission of data as a function of received data 失效
标题翻译：控制数据发送的接收数据的函数的方法和装置
公开(公告)号：US6115387A
公开(公告)日：2000-09-05
申请号：US992811
申请日：1997-12-18
申请人： Chandan Egbert , Thomas J. Runaldue , Bahadir Erimli
发明人： Chandan Egbert , Thomas J. Runaldue , Bahadir Erimli
IPC分类号： G06F5/06 , G06F12/12 , H04L12/18 , H04L12/24 , H04L12/46 , H04L12/56 , H04L29/06 , H04Q3/545 , H04L12/54
CPC分类号： H04L12/1881 , G06F12/128 , G06F5/06 , H04L12/4641 , H04L41/0213 , H04L49/30 , H04L49/90 , H04L49/901 , H04L49/9047 , H04L49/9078 , H04L69/26 , H04Q3/54591 , H04L12/1863 , H04L12/4645 , H04L12/467 , H04L49/103 , H04L49/205 , H04L49/3009 , H04L49/3027 , H04L49/351 , H04L49/354 , H04L49/45 , H04Q2213/1316 , H04Q2213/13162
摘要： A method and arrangement for initiating forwarding of data from a device having multiple receive and transmit ports as a function of the data received at the device includes a plurality of ports for receiving and transmitting data. A port vector FIFO forwards a data identifier to initiate forwarding from at least one of the ports of a received set of data. A holding area is controlled by the port vector FIFO and receives data identifiers and holds these data identifiers until released by the port vector FIFO. The release of a data identifier initiates the forwarding of the data, and each data identifier uniquely identifies each set of data received at the device. The port vector FIFO, upon receiving a data identifier, uses the data identifier to determine the receive port that is receiving the set of data identified by the data identifier. It then determines the mode of that receive port, and releases the data identifier in accordance with the designated mode of that receive port and the data received at that receive port.
摘要翻译：用于从具有多个接收和发送端口的设备开始转发数据作为在设备处接收的数据的函数的方法和装置包括用于接收和发送数据的多个端口。端口向量FIFO转发数据标识符以发起从所接收的一组数据中的至少一个端口的转发。保持区域由端口向量FIFO控制，并接收数据标识符并保存这些数据标识符，直到由端口向量FIFO释放。数据标识符的释放启动数据的转发，并且每个数据标识符唯一地标识在设备处接收到的每组数据。端口向量FIFO在接收到数据标识符后，使用数据标识符来确定接收由数据标识符标识的数据集合的接收端口。然后确定该接收端口的模式，并根据接收端口的指定模式和在该接收端口接收的数据释放数据标识符。

9. 发明授权

US5953335A Method and apparatus for selectively discarding packets for blocked output queues in the network switch 失效
标题翻译：用于选择性地丢弃网络交换机中阻塞的输出队列的分组的方法和装置
公开(公告)号：US5953335A
公开(公告)日：1999-09-14
申请号：US992428
申请日：1997-12-18
申请人： Bahadir Erimli , Thomas J. Runaldue , Chandan Egbert , Denise Kerstein
发明人： Bahadir Erimli , Thomas J. Runaldue , Chandan Egbert , Denise Kerstein
IPC分类号： H04L12/18 , H04L12/24 , H04L12/56 , H04Q3/545 , H04L12/46 , H04L12/26
CPC分类号： H04L49/103 , H04L12/18 , H04L41/0213 , H04L49/201 , H04L49/255 , H04L49/3027 , H04L49/351 , H04Q3/54591 , H04L12/1868 , H04L49/20 , H04L49/30 , H04L49/3009 , H04L49/3054 , H04L49/354 , H04L49/45 , H04Q2213/1316 , H04Q2213/13162
摘要： An apparatus and method of controlling the transmission of copies of a frame of data from a multiport device, such as a multiport network switch, determines which ones of the ports are designated to transmit a copy of a multicopy frame received at the switch. The switch then determines which of these designated ports are not available to transmit a copy of the frame. The copies are transmitted from those designated ports that are available to transmit a copy of the multicopy frame, while the copies are discarded for those designated ports that are not available to transmit a copy of that multicopy frame.
摘要翻译：控制来自多端口设备（例如多端口网络交换机）的数据帧的副本的传输的装置和方法确定哪些端口被指定来传送在交换机处接收的多复制帧的副本。然后，交换机确定哪些指定的端口不可用于发送帧的副本。从可用于发送多拷贝帧的副本的指定端口发送副本，而对于不可用于传送该多拷贝帧的副本的那些指定端口，丢弃副本。

10. 发明授权

US06233244B1 Method and apparatus for reclaiming buffers 失效
标题翻译：回收缓冲液的方法和装置
公开(公告)号：US06233244B1
公开(公告)日：2001-05-15
申请号：US08992927
申请日：1997-12-18
申请人： Thomas J. Runaldue , Bahadir Erimli , Chandan Egbert
发明人： Thomas J. Runaldue , Bahadir Erimli , Chandan Egbert
IPC分类号： G06F1206
CPC分类号： H04L49/9021 , G06F5/06 , H04L41/0213 , H04L49/20 , H04L49/255 , H04L49/30 , H04L49/3009 , H04L49/3027 , H04L49/351 , H04L49/354 , H04L49/45 , H04L49/90 , H04L49/901 , H04L49/9047 , H04L49/9073 , H04L49/9078 , H04L69/26 , H04Q3/54591 , H04Q2213/1316 , H04Q2213/13162
摘要： A method and arrangement for reclaiming buffers used to store frames, following the transmission of a frame, checks to determine whether the transmission of a frame is the last copy of that frame to be transmitted. If it is the last copy, or the only copy, the buffers storing that frame are reclaimed for reuse after the contents of each buffer are transmitted. If the frame is not the last copy, or it cannot be determined whether it is the last copy, then the frame is transmitted and a count of the number of transmitted copies of that frame is decremented. Once all of the copies have been transmitted, the buffer reclaiming process is initiated.
摘要翻译：用于回收用于存储帧的缓冲器的方法和装置，在发送帧之后，检查以确定帧的传输是否是要发送的帧的最后一个拷贝。如果是最后一个副本或唯一的副本，则在发送每个缓冲区的内容之后，存储该帧的缓冲区被回收以供重用。如果帧不是最后一个副本，或者不能确定它是否是最后一个副本，则发送帧，并且该帧的发送副本的数量减少。一旦所有副本都被传输，缓冲区回收过程就会启动。

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