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51. 发明授权

US07227840B1 High performance probabilistic rate policer 有权
标题翻译：高性能概率率策略器
公开(公告)号：US07227840B1
公开(公告)日：2007-06-05
申请号：US10098493
申请日：2002-03-18
申请人： Dennis C. Ferguson , Devereaux C. Chen , John W. Stewart, III , James Washburn , Jeffrey R. Zimmer
发明人： Dennis C. Ferguson , Devereaux C. Chen , John W. Stewart, III , James Washburn , Jeffrey R. Zimmer
IPC分类号： H04L12/22 , H04L12/56
CPC分类号： H04L47/10 , H04L47/20 , H04L47/39
摘要： A data flow rate policer enforces data flow policies for a number of data flows using a probabilistic policy enforcement mechanism. The policer includes a memory that stores the state of each data flow in a compact data structure. Additionally, the policer includes one or more policing engines that implement the actual data flow policies based on information derived from the data structures. The policing engines may be implemented in hardware to increase performance.
摘要翻译：数据流速策略器使用概率策略执行机制来执行多个数据流的数据流策略。监管者包括一个存储器，它将每个数据流的状态存储在紧凑的数据结构中。另外，监管者还包括一个或多个监管引擎，其基于从数据结构导出的信息来实现实际的数据流策略。警务引擎可以以硬件实现以提高性能。

52. 发明授权

US07215637B1 Systems and methods for processing packets 有权
标题翻译：用于处理数据包的系统和方法
公开(公告)号：US07215637B1
公开(公告)日：2007-05-08
申请号：US10017719
申请日：2001-12-14
申请人： Dennis C. Ferguson , Rajiv Patel , Gerald Cheung , Pradeep Sindhu
发明人： Dennis C. Ferguson , Rajiv Patel , Gerald Cheung , Pradeep Sindhu
IPC分类号： H04L12/26
CPC分类号： H04L45/745 , H04L45/00 , H04L45/60 , H04L45/7457 , H04L47/10 , H04L47/11 , H04L47/125 , H04L47/20 , H04L49/205 , H04L49/3009 , H04L49/3036 , H04L49/3072 , H04L63/0227 , H04L63/1458 , H04L69/22
摘要： Methods and devices for processing packets are provided. The processing device may include an input interface for receiving data units containing header information of respective packets; a first module configurable to perform packet filtering based on the received data units; a second module configurable to perform traffic analysis based on the received data units; a third module configurable to perform load balancing based on the received data units; and a fourth module configurable to perform route lookups based on the received data units.
摘要翻译：提供了处理数据包的方法和设备。处理装置可以包括用于接收包含各个分组的报头信息的数据单元的输入接口; 第一模块，可配置为基于所接收的数据单元执行分组过滤; 第二模块，其可配置为基于所接收的数据单元执行流量分析; 第三模块，可配置为基于所接收的数据单元执行负载平衡; 以及第四模块，其可配置为基于所接收的数据单元执行路线查找。

53. 发明授权

US07062546B1 Network device channel configuration 有权
标题翻译：网络设备通道配置
公开(公告)号：US07062546B1
公开(公告)日：2006-06-13
申请号：US10072428
申请日：2002-02-07
申请人： Timothy D. Kolar , Michael J. Beesley , Dennis C. Ferguson
发明人： Timothy D. Kolar , Michael J. Beesley , Dennis C. Ferguson
IPC分类号： G06F15/177
CPC分类号： H04L41/0879 , H04L41/0803
摘要： A network device supports an interface by which a user enters text-based configuration input that describes the channelization of a network link. The configuration input includes one or more text blocks of that define and hierarchically relate a data channel and at least one data sub-channel. The network device may include a control unit to communicate data packets over a channelized network link according to the configuration input. Accordingly, the user can view the text block for a particular channel or sub-channel without having to significantly scroll the display. In addition, the configuration input for the channels can readily be stored in multiple configuration files, and need not be maintained in a single file having continuous, nested levels configuration input.
摘要翻译：网络设备支持用户输入描述网络链路的信道化的基于文本的配置输入的接口。配置输入包括一个或多个文本块，其限定和分级地关联数据信道和至少一个数据子信道。网络设备可以包括控制单元，用于根据配置输入通过信道化网络链路传送数据分组。因此，用户可以观看特定频道或子频道的文本块，而不必显着地滚动显示。此外，通道的配置输入可以容易地存储在多个配置文件中，并且不需要保持在具有连续的嵌套级配置输入的单个文件中。

54. 发明授权

US06810501B1 Single cycle cyclic redundancy checker/generator 有权
标题翻译：单周期循环冗余校验器/发生器
公开(公告)号：US06810501B1
公开(公告)日：2004-10-26
申请号：US09752829
申请日：2001-01-03
申请人： Dennis C. Ferguson , Devereaux C. Chen , Ramesh Padmanabhan , Chang-Hong Wu , Thomas Michael Skibo
发明人： Dennis C. Ferguson , Devereaux C. Chen , Ramesh Padmanabhan , Chang-Hong Wu , Thomas Michael Skibo
IPC分类号： H03M1300
CPC分类号： H03M13/091
摘要： A system updates a cyclic redundancy check (CRC) value. The system receives data containing an arbitrary number of valid and invalid portions. The valid portions are positioned adjacent to one another. The system also receives a signal representing a quantity of valid portions in the data and a current CRC value. The system updates the current CRC value using the data and signal in a single clock cycle.
摘要翻译：系统更新循环冗余校验（CRC）值。系统接收包含任意数量的有效和无效部分的数据。有效部分彼此相邻地定位。该系统还接收表示数据中有效部分的数量的信号和当前的CRC值。系统在单个时钟周期内使用数据和信号更新当前CRC值。

55. 发明授权

US07995586B2 Multi-protocol label switching in a network device 有权
标题翻译：网络设备中的多协议标签交换
公开(公告)号：US07995586B2
公开(公告)日：2011-08-09
申请号：US12713570
申请日：2010-02-26
申请人： Dennis C. Ferguson , Der-Hwa Gan
发明人： Dennis C. Ferguson , Der-Hwa Gan
IPC分类号： H04L12/28
CPC分类号： H04L45/50 , H04L45/10 , H04L45/60 , H04L49/3009 , H04L69/22
摘要： A network device for processing data packets includes input logic, a register, route lookup logic and output processing logic. The input logic receives a data packet having at least one multi-protocol label switching (MPLS) tag, stores the packet and forwards a portion of the packet including the MPLS tag. The route lookup logic receives the portion of the packet, generates next hop information based on the MPLS tag and determines whether at least one MPLS tag is to be removed from the packet before the packet is to be output by the network device. The route lookup logic also modifies a start offset value in the register for each MPLS tag that is to be removed and forwards the start offset. The output processing logic receives the start offset and begins processing the data packet for output at a location identified by the start offset.
摘要翻译：用于处理数据分组的网络设备包括输入逻辑，寄存器，路由查找逻辑和输出处理逻辑。输入逻辑接收具有至少一个多协议标签交换（MPLS）标签的数据分组，存储分组并转发包括MPLS标签的分组的一部分。路由查找逻辑接收分组的部分，基于MPLS标签生成下一跳信息，并且确定在网络设备要输出分组之前是否要从分组中移除至少一个MPLS标签。路由查找逻辑还修改要删除的每个MPLS标签的寄存器中的起始偏移值，并转发起始偏移量。输出处理逻辑接收起始偏移并开始处理数据包以便在由起始偏移识别的位置输出。

56. 发明授权

US07986629B1 Filtering and route lookup in a switching device 失效
标题翻译：在交换设备中过滤和路由查找
公开(公告)号：US07986629B1
公开(公告)日：2011-07-26
申请号：US12697101
申请日：2010-01-29
申请人： Dennis C. Ferguson , Rajiv Patel , Gerald Cheung , Pradeep Sindhu
发明人： Dennis C. Ferguson , Rajiv Patel , Gerald Cheung , Pradeep Sindhu
IPC分类号： H04L12/26
CPC分类号： H04L67/1002 , H04L43/022 , H04L43/028 , H04L43/50 , H04L45/00 , H04L45/60 , H04L45/745 , H04L45/7457 , H04L47/10 , H04L47/125 , H04L47/20 , H04L47/2441 , H04L47/32 , H04L49/205 , H04L49/25 , H04L49/3009 , H04L49/3036 , H04L49/3072 , H04L63/0227 , H04L69/22
摘要： Methods and devices for processing packets are provided. The processing device may Include an input interface for receiving data units containing header information of respective packets; a first module configurable to perform packet filtering based on the received data units; a second module configurable to perform traffic analysis based on the received data units; a third module configurable to perform load balancing based on the received data units; and a fourth module configurable to perform route lookups based on the received data units.
摘要翻译：提供了处理数据包的方法和设备。处理装置可以包括用于接收包含相应分组的报头信息的数据单元的输入接口; 第一模块，可配置为基于所接收的数据单元执行分组过滤; 第二模块，可配置为基于所接收的数据单元执行流量分析; 第三模块，可配置为基于所接收的数据单元执行负载平衡; 以及第四模块，其可配置为基于所接收的数据单元执行路线查找。

57. 发明授权

US07787472B2 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：US07787472B2
公开(公告)日：2010-08-31
申请号：US11932104
申请日：2007-10-31
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： H04L12/28
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。

58. 发明授权

US07724737B1 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：US07724737B1
公开(公告)日：2010-05-25
申请号：US11943923
申请日：2007-11-21
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。

59. 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。

60. 发明授权

US07688727B1 Filtering and route lookup in a switching device 有权
标题翻译：在交换设备中过滤和路由查找
公开(公告)号：US07688727B1
公开(公告)日：2010-03-30
申请号：US11614583
申请日：2006-12-21
申请人： Dennis C. Ferguson , Rajiv Patel , Gerald Cheung , Pradeep Sindhu
发明人： Dennis C. Ferguson , Rajiv Patel , Gerald Cheung , Pradeep Sindhu
IPC分类号： H04L12/26
CPC分类号： H04L67/1002 , H04L43/022 , H04L43/028 , H04L43/50 , H04L45/00 , H04L45/60 , H04L45/745 , H04L45/7457 , H04L47/10 , H04L47/125 , H04L47/20 , H04L47/2441 , H04L47/32 , H04L49/205 , H04L49/25 , H04L49/3009 , H04L49/3036 , H04L49/3072 , H04L63/0227 , H04L69/22
摘要： Methods and devices for processing packets are provided. The processing device may Include an input interface for receiving data units containing header information of respective packets; a first module configurable to perform packet filtering based on the received data units; a second module configurable to perform traffic analysis based on the received data units; a third module configurable to perform load balancing based on the received data units; and a fourth module configurable to perform route lookups based on the received data units.
摘要翻译：提供了处理数据包的方法和设备。处理装置可以包括用于接收包含相应分组的报头信息的数据单元的输入接口; 第一模块，可配置为基于所接收的数据单元执行分组过滤; 第二模块，可配置为基于所接收的数据单元执行流量分析; 第三模块，可配置为基于所接收的数据单元执行负载平衡; 以及第四模块，其可配置为基于所接收的数据单元执行路线查找。

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