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1. 发明授权

US07917578B1 Managing state information in a computing environment 失效
公开(公告)号：US07917578B1
公开(公告)日：2011-03-29
申请号：US11847728
申请日：2007-08-30
申请人： David M. Katz , Dennis C. Ferguson
发明人： David M. Katz , Dennis C. Ferguson
IPC分类号： G06F15/16
CPC分类号： G06F17/30985 , Y10S707/99942
摘要： A software module operating within a router, such as an operating system, manages state information within a hierarchically ordered and temporally-linked data structure. The software module sends state change messages to other software modules within the router, referred to as consumers, in an order that corresponds to the hierarchical order and the temporal linking. The data structure may comprise a plurality of objects to store state information. The operating system may receive event messages that indicate a change to the state information. The objects may be hierarchically linked in accordance with a hierarchy representing relationships of event messages. The objects may be temporally linked in accordance with the order in which the operating system receives event messages. The operating system may traverse the data structure according to the temporal and hierarchical links to select state change messages to send to a consumer.

2. 发明授权

US08082364B1 Managing state information in a computing environment 有权
标题翻译：在计算环境中管理状态信息
公开(公告)号：US08082364B1
公开(公告)日：2011-12-20
申请号：US13073753
申请日：2011-03-28
申请人： David M. Katz , Dennis C. Ferguson
发明人： David M. Katz , Dennis C. Ferguson
IPC分类号： G06F15/16
CPC分类号： G06F17/30985 , Y10S707/99942
摘要： A software module operating within a router, such as an operating system, manages state information within a hierarchically ordered and temporally-linked data structure. The software module sends state change messages to other software modules within the router, referred to as consumers, in an order that corresponds to the hierarchical order and the temporal linking. The data structure may comprise a plurality of objects to store state information. The operating system may receive event messages that indicate a change to the state information. The objects may be hierarchically linked in accordance with a hierarchy representing relationships of event messages. The objects may be temporally linked in accordance with the order in which the operating system receives event messages. The operating system may traverse the data structure according to the temporal and hierarchical links to select state change messages to send to a consumer.
摘要翻译：在诸如操作系统的路由器内操作的软件模块管理层级排序和时间链接的数据结构内的状态信息。软件模块以对应于分级顺序和时间链接的顺序将状态改变消息发送到路由器内的其他软件模块（称为消费者）。数据结构可以包括存储状态信息的多个对象。操作系统可以接收指示状态信息改变的事件消息。可以根据表示事件消息的关系的层次结构来分层地链接对象。对象可以根据操作系统接收到事件消息的顺序在时间上相关联。操作系统可以根据时间和分层链路遍历数据结构，以选择要发送给消费者的状态改变消息。

3. 发明授权

US07720047B1 Managing periodic communications 有权
标题翻译：管理定期沟通
公开(公告)号：US07720047B1
公开(公告)日：2010-05-18
申请号：US11947472
申请日：2007-11-29
申请人： David M. Katz , Dennis C. Ferguson
发明人： David M. Katz , Dennis C. Ferguson
IPC分类号： H04L12/56 , H04J1/16
CPC分类号： H04L45/00 , H04L45/52 , H04L45/56
摘要： Techniques are described for managing periodic communications between devices. For example, a periodic packet process may receive configuration parameters from a routing protocol process. The periodic packet process may manage periodic communication sessions with neighboring devices in accordance with the configuration parameters from the routing protocol process. The periodic packet process may monitor for incoming periodic packets from a specified neighboring device in a specified periodic time interval. The periodic packet process may also send outbound periodic packets at a specified periodic time interval.
摘要翻译：描述了用于管理设备之间的周期性通信的技术。例如，周期性分组过程可以从路由协议过程接收配置参数。周期性分组过程可以根据来自路由协议进程的配置参数来管理与相邻设备的周期性通信会话。周期性分组过程可以在指定的周期性时间间隔内监视来自指定的相邻设备的进入周期性分组。周期性分组过程还可以以指定的周期时间间隔发送出站周期性分组。

4. 发明授权

US07310314B1 Managing periodic communications 有权
标题翻译：管理定期沟通
公开(公告)号：US07310314B1
公开(公告)日：2007-12-18
申请号：US10457828
申请日：2003-06-09
申请人： David M. Katz , Dennis C. Ferguson
发明人： David M. Katz , Dennis C. Ferguson
IPC分类号： H04J1/16
CPC分类号： H04L45/00 , H04L45/52 , H04L45/56
摘要： Techniques are described for managing periodic communications between devices. For example, a periodic packet process may receive configuration parameters from a routing protocol process. The periodic packet process may manage periodic communication sessions with neighboring devices in accordance with the configuration parameters from the routing protocol process. The periodic packet process may monitor for incoming periodic packets from a specified neighboring device in a specified periodic time interval. The periodic packet process may also send outbound periodic packets at a specified periodic time interval.
摘要翻译：描述了用于管理设备之间的周期性通信的技术。例如，周期性分组过程可以从路由协议过程接收配置参数。周期性分组过程可以根据来自路由协议进程的配置参数来管理与相邻设备的周期性通信会话。周期性分组过程可以在指定的周期性时间间隔内监视来自指定的相邻设备的进入周期性分组。周期性分组过程还可以以指定的周期时间间隔发送出站周期性分组。

5. 发明授权

US07275081B1 Managing state information in a computing environment 有权
标题翻译：在计算环境中管理状态信息
公开(公告)号：US07275081B1
公开(公告)日：2007-09-25
申请号：US10457814
申请日：2003-06-09
申请人： David M. Katz , Dennis C. Ferguson
发明人： David M. Katz , Dennis C. Ferguson
IPC分类号： G06F15/16
CPC分类号： G06F17/30985 , Y10S707/99942
摘要： A software module operating within a network device, such as an operating system, manages state information within hierarchically ordered and temporally-linked data structure. The software module sends state change messages to other software modules within the network device, referred to as consumers, in an order that corresponds to the hierarchical order and the temporal linking. The data structure may comprise a plurality of objects to store state information. The operating system may receive event messages that indicate a change to the state information. The objects may be hierarchically linked in accordance with a hierarchy representing relationships of event messages. The objects may be temporally linked in accordance with the order in which the operating system receives event messages. The operating system may traverse the data structure according to the temporal and hierarchical links to select state change messages to send to a consumer.
摘要翻译：在诸如操作系统的网络设备内操作的软件模块管理层级有序和时间链接的数据结构内的状态信息。软件模块以对应于分级顺序和时间链接的顺序将状态改变消息发送到网络设备内的称为消费者的其他软件模块。数据结构可以包括存储状态信息的多个对象。操作系统可以接收指示状态信息改变的事件消息。可以根据表示事件消息的关系的层次结构来分层地链接对象。对象可以根据操作系统接收到事件消息的顺序在时间上相关联。操作系统可以根据时间和分层链路遍历数据结构，以选择要发送给消费者的状态改变消息。

6. 发明授权

US08416686B2 Packet spraying for load balancing across multiple packet processors 有权
公开(公告)号：US08416686B2
公开(公告)日：2013-04-09
申请号：US12840406
申请日：2010-07-21
申请人： Dennis C. Ferguson , Chi-Chung Chen , Thomas M. Skibo
发明人： Dennis C. Ferguson , Chi-Chung Chen , Thomas M. Skibo
IPC分类号： G01R31/08
CPC分类号： H04L47/522 , H04L45/60 , H04L47/10 , H04L47/125
摘要： A network device includes multiple packet processing engines implemented in parallel with one another. A spraying component distributes incoming packets to the packet processing engines using a spraying technique that load balances the packet processing engines. In particular, the spraying component distributes the incoming packets based on queue lengths associated with the packet processing engines and based on a random component. In one implementation, the random component is a random selection from all the candidate processing engines. In another implementation, the random component is a weighted random selection in which the weights are inversely proportional to the queue lengths.

7. 发明授权

US07826375B1 Data duplication for transmission over computer networks 有权
标题翻译：通过计算机网络传输的数据复制
公开(公告)号：US07826375B1
公开(公告)日：2010-11-02
申请号：US12029893
申请日：2008-02-12
申请人： Dennis C. Ferguson
发明人： Dennis C. Ferguson
IPC分类号： G01R31/08 , H04L12/28
CPC分类号： H04L12/66
摘要： Techniques are described that increase the reliability and quality of data transmissions of computer networks. The techniques provide for the generation of at least two duplicate data flows for carrying data in a computer network. The duplicate data flows are transmitted to a receiving device along paths within one or more intermediate networks. In addition, network devices, such as routers or switches within the network, for example, may cooperate to select paths for the data flows that have reduced or minimal common network elements. The network devices may share “fate-sharing” information that relates groups of network elements according to common characteristics, attributes or shared resources, e.g., a shared power supply, close proximity, common physical interface, for the purposes of facilitating selection of independent paths.
摘要翻译：描述了提高计算机网络的数据传输的可靠性和质量的技术。这些技术提供了用于在计算机网络中携带数据的至少两个重复数据流的生成。沿着一个或多个中间网络内的路径将重复的数据流发送到接收设备。此外，网络设备（例如网络内的路由器或交换机）可以协作以选择具有减少或最小公共网络元件的数据流的路径。网络设备可以根据共同特性，属性或共享资源（例如共享电源，近距离，公共物理接口）共享与网络元件组相关的“命运共享”信息，以便于选择独立路径。

8. 发明授权

US07317721B1 Systems and methods for memory utilization during packet forwarding 有权
标题翻译：数据包转发期间内存利用的系统和方法
公开(公告)号：US07317721B1
公开(公告)日：2008-01-08
申请号：US10120380
申请日：2002-04-12
申请人： Pradeep Sindhu , Raymond M. Lim , Dennis C. Ferguson
发明人： Pradeep Sindhu , Raymond M. Lim , Dennis C. Ferguson
IPC分类号： H04L12/56
CPC分类号： H04L45/16 , H04L45/02 , H04L49/201
摘要： A network device includes a memory and a packet forwarding engine. The memory stores a multicast list table, tag descriptor data and layer 2 (L2) encapsulation data. The packet forwarding engine receives a first pointer to an entry in the multicast list table, the entry including a second pointer to the tag descriptor data. The packet forwarding engine utilizes the second pointer to retrieve the tag descriptor data, the tag descriptor data including a third pointer to the encapsulation data. The packet forwarding engine constructs a packet header utilizing the retrieved encapsulation data and appends the packet header to a packet payload for forwarding out of the packet forwarding engine.
摘要翻译：网络设备包括存储器和分组转发引擎。存储器存储多播列表表，标签描述符数据和层2（L2）封装数据。分组转发引擎接收到多播列表表中的条目的第一指针，该条目包括指向标签描述符数据的第二指针。分组转发引擎利用第二指针来检索标签描述符数据，标签描述符数据包括指向封装数据的第三指针。分组转发引擎使用所检索的封装数据构建分组报头，并将分组报头附加到分组有效载荷，以转发出分组转发引擎。

9. 发明授权

US07307949B1 Hierarchical policers for enforcing differentiated traffic behavior 有权
标题翻译：执行差异化交通行为的分层策略
公开(公告)号：US07307949B1
公开(公告)日：2007-12-11
申请号：US10298552
申请日：2002-11-19
申请人： James Washburn , Spencer Greene , Rami Rahim , Stefan Dyckerhoff , Dennis C. Ferguson , Philippe Lacroute
发明人： James Washburn , Spencer Greene , Rami Rahim , Stefan Dyckerhoff , Dennis C. Ferguson , Philippe Lacroute
IPC分类号： H04J1/16
CPC分类号： H04L47/10 , H04L47/20 , H04L47/2441 , H04L47/32 , H04L47/39
摘要： A hierarchical traffic policer may include a first policer configured to pass first packets when a first condition is met. The first policer also may alter selection information within the passed first packets. A second policer may be configured to pass second packets when a second condition is met. The second policer may be further configured to pass all of the passed first packets from the first policer based on the altered selection information within the passed first packets.
摘要翻译：分级流量监管器可以包括配置成在满足第一条件时传递第一分组的第一策略器。第一个策略器还可以改变所传递的第一个分组内的选择信息。当满足第二条件时，第二策略器可以被配置为传递第二分组。第二策略器可以被进一步配置为基于所传递的第一分组内的改变的选择信息，从第一策略器传递所有传递的第一分组。

10. 发明授权

US07116660B2 Memory organization in a switching device 有权
公开(公告)号：US07116660B2
公开(公告)日：2006-10-03
申请号：US10310462
申请日：2002-12-04
申请人： Pradeep S. Sindhu , Dennis C. Ferguson , Bjorn O. Liencres , Nalini Agarwal , Hann-Hwan Ju , Raymond Marcelino Manese Lim , Rasoul Mirzazadeh Oskouy , Sreeram Veeragandham
发明人： Pradeep S. Sindhu , Dennis C. Ferguson , Bjorn O. Liencres , Nalini Agarwal , Hann-Hwan Ju , Raymond Marcelino Manese Lim , Rasoul Mirzazadeh Oskouy , Sreeram Veeragandham
IPC分类号： H04J3/24
CPC分类号： G06F15/167 , H04L12/5601 , H04L29/06 , H04L45/00 , H04L45/72 , H04L45/7457 , H04L47/6225 , H04L49/103 , H04L49/108 , H04L49/1538 , H04L49/203 , H04L49/25 , H04L49/252 , H04L49/3072 , H04L49/3081 , H04L49/608 , H04L49/90 , H04L49/901 , H04L49/9042 , H04L49/9047 , H04L49/9057 , H04L69/22 , H04L2012/5652 , H04L2012/5679 , H04L2012/5681 , H04Q11/0478
摘要： A router for switching data packets from a source to a destination in a network in which the router includes a distributed memory. The distributed memory includes two or more memory banks. Each memory bank is used for storing uniform portions of a data packet received from a source and linking information for each data packet to allow for the extraction of the uniform portions of a data packet from distributed locations in memory in proper order after a routing determination has been made by the router.

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