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91. 发明授权

US07852772B2 Method of implementing a backup path in an autonomous system 有权
标题翻译：在自治系统中实现备份路径的方法
公开(公告)号：US07852772B2
公开(公告)日：2010-12-14
申请号：US11254609
申请日：2005-10-20
申请人： Clarence Filsfils , Stewart Bryant , Ian Michael Charles Shand , David D. Ward , John Galen Scudder
发明人： Clarence Filsfils , Stewart Bryant , Ian Michael Charles Shand , David D. Ward , John Galen Scudder
IPC分类号： H04L12/26
CPC分类号： H04L45/00 , H04L45/18 , H04L45/22 , H04L45/28
摘要： A method of implementing a backup path in an autonomous system (AS) for failure of an inter-AS link is described. The method comprises forwarding data elements destined for the failed link via a backup path and including a loop prevention attribute in the packet.
摘要翻译：描述了在自治系统（AS）中实现AS间链路故障的备用路径的方法。该方法包括经由备份路径转发去往故障链路的数据元素，并在分组中包括环路防止属性。

92. 发明授权

US07765306B2 Technique for enabling bidirectional forwarding detection between edge devices in a computer network 有权
标题翻译：用于在计算机网络中的边缘设备之间启用双向转发检测的技术
公开(公告)号：US07765306B2
公开(公告)日：2010-07-27
申请号：US11342446
申请日：2006-01-30
申请人： Clarence Filsfils , David D. Ward
发明人： Clarence Filsfils , David D. Ward
IPC分类号： G06F15/16 , G06F15/177
CPC分类号： H04L45/22 , H04L45/02 , H04L45/04 , H04L45/28
摘要： A technique enables bidirectional forwarding detection (BFD) between first and second edge devices in a computer network, wherein the second edge device is not configured for BFD. According to the novel technique, a BFD Echo session is established from the first edge device to the first edge device via the second edge device, i.e., along a monitored path (e.g., a single link). Also, an external border gateway protocol (eBGP) session is established between the first and second edge devices over an alternate path (e.g., an eBGP multi-hop session). The first edge device determines that the monitored path is down upon not receiving a returned BFD Echo message from the second edge device. In response, the first edge device notifies the second edge device that the monitored path is down through the eBGP session over the alternate path. Notably, upon notifying the second edge device that the monitored path is down, the first edge device breaks the eBGP session, and upon receiving the notification, the second edge device also breaks the eBGP session.
摘要翻译：一种技术在计算机网络中的第一和第二边缘设备之间实现双向转发检测（BFD），其中第二边缘设备不配置用于BFD。根据该新技术，经由第二边缘设备，即沿着被监视的路径（例如，单个链路），从第一边缘设备到第一边缘设备建立BFD回波会话。另外，通过备用路径（例如，eBGP多跳会话）在第一和第二边缘设备之间建立外部边界网关协议（eBGP）会话。第一边缘设备确定在没有从第二边缘设备接收到返回的BFD Echo消息时，所监视的路径下降。作为响应，第一边缘设备通过备用路径通过eBGP会话通知第二边缘设备所监视的路径正在关闭。值得注意的是，当通知第二边缘设备被监控的路径关闭时，第一边缘设备破坏eBGP会话，并且在接收到该通知时，第二边缘设备也中断eBGP会话。

93. 发明授权

US07710882B1 Method and apparatus for computing routing information for a data communications network 有权
标题翻译：用于计算数据通信网络的路由信息的方法和装置
公开(公告)号：US07710882B1
公开(公告)日：2010-05-04
申请号：US10792945
申请日：2004-03-03
申请人： Stefano Benedetto Previdi , Clarence Filsfils
发明人： Stefano Benedetto Previdi , Clarence Filsfils
IPC分类号： H04L12/26 , H04L12/28 , H04L12/56
CPC分类号： H04L45/48 , H04L45/02 , H04L45/028
摘要： A method is disclosed for computing routing information for a data communications network comprising a plurality of nodes. The method comprises the step performed at a computing node of receiving from a remote node in the network a routing information update representing a change of state of the network. The method further comprises processing the update to identify a change of state type and setting, dependent on the change of state type, a delay interval after which routing information is to be computed from the update.
摘要翻译：公开了一种用于计算包括多个节点的数据通信网络的路由信息的方法。该方法包括在计算节点处从网络中的远程节点接收表示网络状态变化的路由信息更新的步骤。该方法还包括处理更新以根据状态类型的改变来识别状态类型和设置的改变，延迟间隔之后，从更新计算路由信息。

94. 发明授权

US07707307B2 Method and apparatus for constructing a backup route in a data communications network 有权
标题翻译：在数据通信网络中构建备份路由的方法和装置
公开(公告)号：US07707307B2
公开(公告)日：2010-04-27
申请号：US10340371
申请日：2003-01-09
申请人： Kevin George Miles , Ian Michael Charles Shand , Stewart Frederick Bryant , Stefano Benedetto Previdi , John Anthony Harper , Clarence Filsfils
发明人： Kevin George Miles , Ian Michael Charles Shand , Stewart Frederick Bryant , Stefano Benedetto Previdi , John Anthony Harper , Clarence Filsfils
IPC分类号： G06F15/173 , G01R31/08
CPC分类号： H04L45/22 , H04L45/28 , H04L45/48 , H04L69/14 , H04L69/40
摘要： A method is disclosed for constructing a backup route from a source node around an adjacent component. The source node derives a first set of nodes reachable from it without traversing the adjacent component and a second set of nodes from which a neighbor node of adjacent components is reachable without traversing the adjacent component. The source node then constructs a backup route via an intermediate node in the intersection of the first and second sets.
摘要翻译：公开了一种用于从邻近组件周围的源节点构建备用路由的方法。源节点导出可从其到达的第一组节点，而不穿过相邻组件和相邻组件的相邻节点可到达的第二组节点，而不穿过相邻组件。源节点然后经由第一和第二组的交集中的中间节点构建备用路由。

95. 发明授权

US07675926B2 Hierarchical QoS behavioral model 有权
标题翻译：分层QoS行为模型
公开(公告)号：US07675926B2
公开(公告)日：2010-03-09
申请号：US10840126
申请日：2004-05-05
申请人： Robert Olsen , Michael Laor , Clarence Filsfils
发明人： Robert Olsen , Michael Laor , Clarence Filsfils
IPC分类号： H04L12/56
CPC分类号： H04L47/6215 , H04L41/044 , H04L47/2441 , H04L47/30 , H04L47/326 , H04L47/50 , H04L47/52 , H04L47/60
摘要： A hierarchical traffic management system and method (i.e., a QoS behavioral model) are disclosed herein. The system includes a classifier operable to identify and classify incoming traffic streams and a queuing system. The queuing system includes a plurality of queues and is operable to apply scheduling policies to the traffic streams. The queues of the queuing system each include enqueue attributes configured to control a depth of the queue and dequeue attributes configured to control scheduling of the queue. The dequeue attributes include minimum bandwidth, maximum bandwidth, excess bandwidth, and priority, wherein each of the queues has one or more of the dequeue attributes defined.
摘要翻译：本文公开了分级业务管理系统和方法（即，QoS行为模型）。该系统包括可用于识别和分类输入业务流的分类器和排队系统。排队系统包括多个队列，并且可操作以将调度策略应用于业务流。排队系统的队列每个都包括配置为控制队列深度的入队属性，并将配置为控制队列调度的属性出队。出队属性包括最小带宽，最大带宽，超额带宽和优先级，其中每个队列具有定义的一个或多个出队属性。

96. 发明申请

US20090225671A1 Monitoring Quality of a Packet Flow in Packet-Based Communication Networks 有权
标题翻译：在基于分组的通信网络中监测分组流的质量
公开(公告)号：US20090225671A1
公开(公告)日：2009-09-10
申请号：US12043203
申请日：2008-03-06
申请人： Yuki Arbel , Michael Keohane , Ravid Sagy , Oren Shemesh , Clarence Filsfils
发明人： Yuki Arbel , Michael Keohane , Ravid Sagy , Oren Shemesh , Clarence Filsfils
IPC分类号： H04L12/26
CPC分类号： H04L43/00 , H04L43/0829 , H04L43/0852 , H04L43/12
摘要： A communication system includes multiple routers interconnected by a packet-based communication network. Each of the routers includes a monitoring application that monitors quality of one or more packet flows during each of multiple successive monitoring periods. For each of the packet flows, the monitoring application determines quality metrics based on information obtained from transport headers of packets.
摘要翻译：通信系统包括通过基于分组的通信网络互连的多个路由器。每个路由器包括监视应用程序，其监视在多个连续监视周期期间的每一个期间一个或多个分组流的质量。对于每个分组流，监视应用基于从分组的传输报头获得的信息来确定质量度量。

97. 发明申请

US20090122805A1 Instrumenting packet flows 有权
标题翻译：测试数据包流
公开(公告)号：US20090122805A1
公开(公告)日：2009-05-14
申请号：US11985239
申请日：2007-11-14
申请人： Gary Paul Epps , David Delano Ward , John H. W. Bettink , Christopher Yates Satterlee , Mohammed Ismael Tatar , Clarence Filsfils
发明人： Gary Paul Epps , David Delano Ward , John H. W. Bettink , Christopher Yates Satterlee , Mohammed Ismael Tatar , Clarence Filsfils
IPC分类号： H04L12/56
CPC分类号： H04L41/5009 , H04L41/5003 , H04L43/0829 , H04L43/0852 , H04L43/087 , H04L43/16
摘要： Disclosed are, inter alia, methods, apparatus, computer-readable media, mechanisms, and means for instrumenting real-time customer packet traffic. These measured delays can be used to determine whether or not the performance of a packet switching device and/or network meets desired levels, especially for complying with a Service Level Agreement.
摘要翻译：公开的方法，装置，计算机可读介质，机制和装置用于实时客户分组流量的装置。这些测量的延迟可以用于确定分组交换设备和/或网络的性能是否满足期望的水平，特别是对于遵守服务水平协议。

98. 发明授权

US07496650B1 Identifying and suppressing transient routing updates 有权
标题翻译：识别和抑制瞬态路由更新
公开(公告)号：US07496650B1
公开(公告)日：2009-02-24
申请号：US10811626
申请日：2004-03-29
申请人： Stefano Benedetto Previdi , John Galen Scudder , Clarence Filsfils , David Delano Ward
发明人： Stefano Benedetto Previdi , John Galen Scudder , Clarence Filsfils , David Delano Ward
IPC分类号： G06F15/173 , G01R31/08 , H04L12/28
CPC分类号： H04L45/028 , H04L45/22 , H04L45/28 , H04L45/48 , H04L69/14 , H04L69/40
摘要： One or more sets of routing information are maintained. A network topology change indication of a progressive series of network changes is received, with at least one more associated network topology change indication of the progressive series of network changes expected to be received in the future. An updated set of routing information is computed based on the network topology change indication, and a determination is made as to whether or not the updated set of routing information changes nexthop information for one or more routes. In response to determining that the new set of routing information does not change nexthop information for said one or more routes and given the expectation of at least one more associated network topology change indication of the progressive series of network changes is expected to be received in the future, the routing information is not updated based on the updated set of routing information.
摘要翻译：维护一组或多组路由信息。接收到逐渐的一系列网络改变的网络拓扑变化指示，其中至少一个更多关联的网络拓扑改变预期在将来接收的渐进的一系列网络变化的指示。基于网络拓扑变化指示计算更新的路由信息集合，并且确定更新的路由信息集合是否改变一个或多个路由的下一跳信息。响应于确定新的路由信息集合不会改变用于所述一个或多个路由的下一跳信息，并且给出期望至少一个更相关联的网络拓扑结构的变化指示逐渐的一系列网络改变将在未来，路由信息不会根据更新的路由信息集进行更新。

99. 发明授权

US07042838B1 Method and apparatus for forwarding data in a data communications network 失效
标题翻译：用于在数据通信网络中转发数据的方法和装置
公开(公告)号：US07042838B1
公开(公告)日：2006-05-09
申请号：US10848669
申请日：2004-05-18
申请人： Ian Michael Charles Shand , Stewart Frederick Bryant , Clarence Filsfils , Kevin George Miles
发明人： Ian Michael Charles Shand , Stewart Frederick Bryant , Clarence Filsfils , Kevin George Miles
IPC分类号： G01R31/08
CPC分类号： H04L45/22 , H04L45/00 , H04L45/18 , H04L45/28
摘要： A method of forwarding data in a data communications network comprising a plurality of nodes comprises the step of forwarding data according to a forwarding strategy implemented at a forwarding node. Where the implemented strategy comprises a repair strategy to compensate for a change in the network, the method further comprises the step of encapsulating the data in a primary repair encapsulating packet and marking the primary repairing encapsulating packet as repaired.
摘要翻译：在包括多个节点的数据通信网络中转发数据的方法包括根据在转发节点处实现的转发策略来转发数据的步骤。在实施的策略包括补偿网络变化的修复策略的情况下，该方法还包括将数据封装在主修复封装分组中并标记被修复的主修复封装分组的步骤。

100. 发明授权

US09942057B2 Avoiding micro-loops in a ring topology of a network 有权
公开(公告)号：US09942057B2
公开(公告)日：2018-04-10
申请号：US14743715
申请日：2015-06-18
申请人： Stewart Frederick Bryant , Clarence Filsfils , Ian Michael Charles Shand
发明人： Stewart Frederick Bryant , Clarence Filsfils , Ian Michael Charles Shand
IPC分类号： H04L12/437 , H04L12/705 , H04L12/703 , H04L12/427 , H04L12/26
CPC分类号： H04L12/437 , H04L12/427 , H04L43/0811 , H04L45/18 , H04L45/28
摘要： In one embodiment, micro-loops are avoided in ring topologies of packet switching devices by changing the order of propagation of link state information concerning failed communications between a particular packet switching device and a neighbor packet switching device. In one embodiment, the particular packet switching device communicates link state information of a high cost of the particular communications (e.g., in the direction from particular to neighbor packet switching devices) such that this link state information will propagate towards the particular packet switching device from at least from the furthest packet switching device in the ring topology that is currently configured to forward packets having a destination address of the neighbor packet switching device through the particular packet switching device.

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