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1. 发明授权

US07293113B1 Data communication system with hardware protocol parser and method therefor 有权
标题翻译：具有硬件协议解析器的数据通信系统及其方法
公开(公告)号：US07293113B1
公开(公告)日：2007-11-06
申请号：US10447824
申请日：2003-05-28
申请人： Gopal Krishna , Mrudula Kanuri
发明人： Gopal Krishna , Mrudula Kanuri
IPC分类号： G06F15/16 , G06F1/32
CPC分类号： H04L69/16 , H04L69/12 , H04L69/161 , H04L69/167 , H04L69/22
摘要： A communication processor comprises a data link layer parser circuit (310) and a plurality of network layer parser circuits (322, 326). The data link layer parser circuit (310) receives a data link layer frame, and removes a data link layer header therefrom to provide a network layer frame as an output. Each network layer parser circuit corresponds to a different network layer protocol, and is selectively activated to receive the network layer frame and to process a network layer header therefrom to provide a transport layer frame as an output. The data link layer parser circuit (310) further examines a portion of the network layer frame to determine which of the plurality of network protocols is used. The data link layer parser circuit (310) activates a corresponding one of the plurality of network layer parser circuits (322, 326) in response, while keeping another one of the plurality of network layer parser circuits (322, 326) inactive.
摘要翻译：通信处理器包括数据链路层解析器电路（310）和多个网络层解析器电路（322,326）。数据链路层解析器电路（310）接收数据链路层帧，并从其中去除数据链路层报头，以提供网络层帧作为输出。每个网络层解析器电路对应于不同的网络层协议，并且被选择性地激活以接收网络层帧并处理其中的网络层报头以提供传输层帧作为输出。数据链路层解析器电路（310）进一步检查网络层帧的一部分以确定使用多个网络协议中的哪一个。数据链路层解析器电路（310）响应于激活多个网络层解析器电路（322,326）中的对应的一个，同时保持多个网络层解析器电路（322,326）中的另一个不起作用。

2. 发明授权

US07002955B1 Selective address table aging in a network switch based on application state determined from a received data packet 有权
标题翻译：基于从接收的数据包确定的应用状态，网络交换机中的选择性地址表老化
公开(公告)号：US07002955B1
公开(公告)日：2006-02-21
申请号：US09519848
申请日：2000-03-06
申请人： Mrudula Kanuri , Gopal Krishna
发明人： Mrudula Kanuri , Gopal Krishna
IPC分类号： H04L12/56
CPC分类号： H04L12/4625 , H04L69/28
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 packet classifier module configured for evaluating an incoming data packet on an instantaneous basis. The packet classifier module 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. Hence, the packet classifier module is able to monitor data flows between two network nodes interacting according to a prescribed network application. The packet classifier module determines the application state for a prescribed network application from a received layer 2 data packet, enabling switching logic within the network switch to utilize application-specific aging intervals for respective network applications such as HTTP, SNMP, ftp, Telnet, etc. in order to delete aged address entries from a network switch address table based on the supported network application. Determination of the application state from the received layer 2 data packet also enables the network switch to detect the end of a data flow for deletion of the corresponding address entry from the network switch address table.
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切换而不阻塞输入数据分组的网络交换机包括具有分组分类器模块的网络交换机端口，所述分组分类器模块被配置为即时地评估输入数据分组。分组分类器模块执行数据分组的输入数据流和被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。因此，分组分类器模块能够监视根据规定的网络应用交互的两个网络节点之间的数据流。分组分类器模块从接收的第二层数据分组确定规定的网络应用的应用状态，使得网络交换机内的切换逻辑能够针对各种网络应用（如HTTP，SNMP，FTP，Telnet等）利用应用专用的老化时间间隔以便基于所支持的网络应用从网络交换机地址表中删除老化的地址条目。从接收到的第2层数据包确定应用程序状态还使网络交换机可以从网络交换机地址表中检测到删除相应地址条目的数据流的结束。

3. 发明授权

US08549170B2 Retransmission system and method for a transport offload engine 有权
标题翻译：运输卸载引擎的重发系统和方法
公开(公告)号：US08549170B2
公开(公告)日：2013-10-01
申请号：US10741978
申请日：2003-12-19
申请人： John Shigeto Minami , Michael Ward Johnson , Andrew Currid , Mrudula Kanuri
发明人： John Shigeto Minami , Michael Ward Johnson , Andrew Currid , Mrudula Kanuri
IPC分类号： G06F15/16
CPC分类号： H04L1/1607 , H04L47/193 , H04L49/901
摘要： A system and method are provided for performing the retransmission of data in a network. Included is an offload engine in communication with system memory and a network. The offload engine serves for managing the retransmission of data transmitted in the network.
摘要翻译：提供了一种用于在网络中执行数据重传的系统和方法。包括与系统存储器和网络通信的卸载引擎。卸载引擎用于管理在网络中发送的数据的重传。

4. 发明申请

US20100095036A1 Priority Based Bus Arbiters Avoiding Deadlock And Starvation On Buses That Support Retrying Of Transactions 有权
标题翻译：基于优先级的总线仲裁者避免在支持重试事务的公共汽车上的死锁和饥饿
公开(公告)号：US20100095036A1
公开(公告)日：2010-04-15
申请号：US12250566
申请日：2008-10-14
申请人： Aditya Mittal , Mrudula Kanuri , Venkata Malladi
发明人： Aditya Mittal , Mrudula Kanuri , Venkata Malladi
IPC分类号： G06F13/372
CPC分类号： G06F13/366
摘要： A scheduler provided according to an aspect of the present invention provides higher priority for data units in a low priority queue upon occurrence of a starvation condition, and to packets in a high priority queue otherwise. The scheduler permits retransmission of a data unit in the lower priority queue when in the starvation condition, but clears the starvation condition when the data unit is retransmitted a pre-specified number of times. As a result, the data units in the higher priority queue would continue to be processed, thereby avoiding a deadlock at least in certain situations.
摘要翻译：根据本发明的一个方面提供的调度器在出现饥饿状况时对低优先级队列中的数据单元提供较高优先级，否则在高优先级队列中为分组提供高优先级。当处于饥饿状态时，调度器允许在优先级较低的队列中重新发送数据单元，但是当数据单元重传预定次数时，可以清除饥饿状态。结果，较高优先级队列中的数据单元将继续被处理，从而至少在某些情况下避免了死锁。

5. 发明授权

US07260631B1 System and method for receiving iSCSI protocol data units 有权
标题翻译：用于接收iSCSI协议数据单元的系统和方法
公开(公告)号：US07260631B1
公开(公告)日：2007-08-21
申请号：US10741681
申请日：2003-12-19
申请人： Michael Ward Johnson , Andrew Currid , Mrudula Kanuri , John Shigeto Minami
发明人： Michael Ward Johnson , Andrew Currid , Mrudula Kanuri , John Shigeto Minami
IPC分类号： G06F15/173
CPC分类号： H04L67/1097
摘要： An Internet small computer system interface (iSCSI) system, method and associated data structure are provided for receiving data in protocol data units. After a protocol data unit is received, a data list is identified that describes how the data contained in the protocol data unit is to be stored (i.e. placed, saved, etc.) in memory (i.e. application memory). Further stored is a state of the data list. To this end, the state of the data list is used in conjunction with the storage of data from a subsequent protocol data unit.
摘要翻译：提供了一种互联网小型计算机系统接口（iSCSI）系统，方法和相关数据结构，用于在协议数据单元中接收数据。在接收到协议数据单元之后，识别描述协议数据单元中包含的数据如何被存储（即放置，保存等）到存储器（即应用存储器）中的数据列表。进一步存储的是数据列表的状态。为此，数据列表的状态与来自后续协议数据单元的数据的存储结合使用。

6. 发明授权

US07099285B1 Remote configuration of a subnet configuration table in a network device 有权
标题翻译：远程配置网络设备中的子网配置表
公开(公告)号：US07099285B1
公开(公告)日：2006-08-29
申请号：US09881019
申请日：2001-06-15
申请人： Mrudula Kanuri , Somnath Viswanath , Gopal S. Krishna
发明人： Mrudula Kanuri , Somnath Viswanath , Gopal S. Krishna
IPC分类号： H04L12/16 , H04L12/28
CPC分类号： H04L49/604 , H04L49/15 , H04L49/3009 , H04L49/351
摘要： A multiport switching device includes a configuration table that stores associations between addresses of subnets directly connected to the switching device and the port number of the multiport switching device that leads to the subnet. A host processor connected to the multiport switching device updates and maintains the configuration table. A remote processor communicates with the switching device through the host processor. To facilitate the communication of the remote processor with the multiport switch, the host processor executes a TCP/IP stack and the multiport switch is assigned a unique IP address.
摘要翻译：多端口切换装置包括存储与切换装置直接连接的子网的地址和通向子网的多端口切换装置的端口号之间的关联的配置表。连接到多端口交换设备的主机处理器更新并维护配置表。远程处理器通过主机处理器与交换设备进行通信。为了方便远程处理器与多端口交换机的通信，主处理器执行TCP / IP堆栈，并为多端口交换机分配唯一的IP地址。

7. 发明申请

US20060083246A1 System and method for processing RX packets in high speed network applications using an RX FIFO buffer 有权
标题翻译：使用RX FIFO缓冲区在高速网络应用中处理RX数据包的系统和方法
公开(公告)号：US20060083246A1
公开(公告)日：2006-04-20
申请号：US10969376
申请日：2004-10-19
申请人： John Minami , Robia Uyeshiro , Thien Ooi , Michael Johnson , Mrudula Kanuri
发明人： John Minami , Robia Uyeshiro , Thien Ooi , Michael Johnson , Mrudula Kanuri
IPC分类号： H04L12/56 , H04L12/28
CPC分类号： G06F13/128
摘要： A system and method are provided for processing packets received via a network. In use, data packets and control packets are received via a network. Further, the data packets are processed in parallel with the control packets.
摘要翻译：提供了一种用于处理经由网络接收的分组的系统和方法。在使用中，通过网络接收数据包和控制包。此外，数据分组与控制分组并行处理。

8. 发明授权

US06728246B1 Arrangement for reducing layer 3 header data supplied to switching logic on a network switch 有权
标题翻译：用于减少提供给网络交换机上的交换逻辑的第3层报头数据的布置
公开(公告)号：US06728246B1
公开(公告)日：2004-04-27
申请号：US09502570
申请日：2000-02-11
申请人： Chandan Egbert , Mrudula Kanuri
发明人： Chandan Egbert , Mrudula Kanuri
IPC分类号： H04L1228
CPC分类号： H04L49/602 , H04L49/354
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 network switch ports, each including a port filter configured for obtaining and filtering relevant layer 2 and layer 3 information from a received layer 2 frame. Each port filter, upon filtering the relevant layer 2 and layer 3 information from a received layer 2 frame, outputs the relevant layer 2 and layer 3 information to switching logic, enabling the switching logic to perform layer 3 processing to determine a layer 3 switching operation to be performed on the received layer 2 frame. Hence, the switching logic performs the layer 3 processing based on the relevant layer 2 and layer 3 information, without the necessity of parsing the received layer 2 and layer 3 information by the switching logic.
摘要翻译：一种网络交换机，被配置为执行以太网（IEEE 802.3）网络中的层2和层3切换，而不阻塞传入的数据包，网络交换机端口包括被配置用于获取和过滤相关层2和层3信息的端口过滤器从接收层2帧。每个端口滤波器在从接收层2帧过滤相关层2和层3信息后，将相关层2和层3信息输出到交换逻辑，使切换逻辑能够执行层3处理以确定层3切换操作在接收的层2帧上执行。因此，切换逻辑基于相关层2和层3信息执行层3处理，而不需要通过切换逻辑解析接收层2和层3信息。

9. 发明授权

US08489851B2 Processing of read requests in a memory controller using pre-fetch mechanism 有权
标题翻译：使用预取机制处理内存控制器中的读请求
公开(公告)号：US08489851B2
公开(公告)日：2013-07-16
申请号：US12333295
申请日：2008-12-11
申请人： Balajee Vamanan , Tukaram Methar , Mrudula Kanuri , Sreenivas Krishnan
发明人： Balajee Vamanan , Tukaram Methar , Mrudula Kanuri , Sreenivas Krishnan
IPC分类号： G06F12/00
CPC分类号： G06F12/0862 , G06F2212/6022
摘要： A memory controller provided according to an aspect of the present invention includes a predictor block which predicts future read requests after converting the memory address in a prior read request received from the processor to an address space consistent with the implementation of a memory unit. According to another aspect of the present invention, the predicted requests are granted access to a memory unit only when there are no requests pending from processors and the peripherals sending access requests to the memory unit.
摘要翻译：根据本发明的一方面提供的存储器控制器包括预测器块，该预测器块在将从处理器接收的先前读取请求中的存储器地址转换成与存储器单元的实现一致的地址空间之后，预测将来的读取请求。根据本发明的另一方面，只有当没有来自处理器的请求等待并且外围设备向存储器单元发送访问请求时，预定请求被授予对存储器单元的访问。

10. 发明授权

US07103035B1 Arrangement for searching network addresses in a network switch using multiple tables based on subnet identifier 有权
标题翻译：基于子网标识符，使用多个表搜索网络交换机中的网络地址的安排
公开(公告)号：US07103035B1
公开(公告)日：2006-09-05
申请号：US09482956
申请日：2000-01-14
申请人： Mrudula Kanuri
发明人： Mrudula Kanuri
IPC分类号： H04L12/66 , H04L12/28 , H04Q7/24
CPC分类号： H04L29/12933 , H04L29/12009 , H04L29/12783 , H04L45/745 , H04L61/35 , H04L61/6068
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 switching module for performing layer 2 and layer 3 switching operations, and a plurality of network switch ports, each configured for connecting the network switch to a corresponding subnetwork. The switching module includes a plurality of address tables for storing address information (e.g., layer 2 and layer 3 address and switching information), where each table is configured for storing the address information of a corresponding one of the subnetworks. The use of multiple address tables within the switching module enables the time for looking up address information to be substantially reduced, especially since the multiple address tables can be accessed independently and simultaneously by the switching module. Moreover, the identification of each table by a corresponding subnetwork identifier enables the multiple address tables to be managed efficiently, merely by obtaining the subnetwork identifier from the received layer 2 packet. Hence, layer 3 address information for a given layer 2 packet can be obtained merely by searching the selected address table using the host identifier as a search key.
摘要翻译：一种网络交换机，被配置为在以太网（IEEE 802.3）网络中执行层2和层3切换而不阻塞传入数据分组，包括用于执行层2和层3交换操作的交换模块和多个网络交换机端口，每个配置用于将网络交换机连接到相应的子网络。交换模块包括用于存储地址信息（例如，层2和层3地址和交换信息）的多个地址表，其中每个表被配置用于存储对应的一个子网络的地址信息。在切换模块中使用多个地址表使得能够显着减少查找地址信息的时间，特别是由于可以通过交换模块独立地和同时地访问多个地址表。此外，通过相应的子网标识符对每个表的标识使得能够仅通过从接收的第2层分组获得子网标识来有效地管理多个地址表。因此，可以仅通过使用主机标识符作为搜索关键字搜索所选择的地址表来获得给定层2分组的层3地址信息。

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