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11. 发明授权

US08627137B1 Graceful handling of critical traffic blackholing faults 有权
标题翻译：正确处理关键交通黑洞故障
公开(公告)号：US08627137B1
公开(公告)日：2014-01-07
申请号：US12883895
申请日：2010-09-16
申请人： Nikunj R. Vaidya , Pradosh Mohapatra , Arun Satyanarayana , Pankaj Bhagra , Clarence Filsfils
发明人： Nikunj R. Vaidya , Pradosh Mohapatra , Arun Satyanarayana , Pankaj Bhagra , Clarence Filsfils
IPC分类号： G06F11/00
CPC分类号： H04L41/0672 , H04L41/04 , H04L41/0659 , H04L41/0677 , H04L43/0811 , H04L43/0817 , H04L45/02 , H04L45/28
摘要： In one embodiment, a network device may detect a data plane critical fault condition, while a corresponding control plane is not experiencing a critical fault condition. In response to a network device based critical fault condition, the network device may activate and advertise an increased and expensive usable metric for each network interface of the network device. On the other hand, in response to an interface based critical fault condition, the network device may activate and advertise an increased and expensive usable metric for one or more particular network interfaces of the interface based critical fault, and signals, over the control plane to a corresponding network device at an opposing end of each particular network interface of the interface based critical fault, a request to activate and advertise an increased and expensive usable metric at the opposing end of each particular network interface.
摘要翻译：在一个实施例中，网络设备可以检测数据平面关键故障状况，而相应的控制平面没有经历严重故障状况。响应于基于网络设备的关键故障状况，网络设备可以激活和通告网络设备的每个网络接口的增加且昂贵的可用度量。另一方面，响应于基于接口的关键故障条件，网络设备可以激活并通告在基于接口的关键故障的一个或多个特定网络接口和控制平面上的信号的增加且昂贵的可用度量在基于接口的关键故障的每个特定网络接口的相对端处的相应网络设备，激活并在每个特定网络接口的相对端处通告增加且昂贵的可用度量的请求。

12. 发明申请

US20130223228A1 Resilient Forwarding of Packets with a Per-Customer Edge (per-CE) Label 有权
标题翻译：使用每个客户端（每个CE）标签的数据包的弹性转发
公开(公告)号：US20130223228A1
公开(公告)日：2013-08-29
申请号：US13405455
申请日：2012-02-27
申请人： Pradosh Mohapatra , Neeraj Malhotra , Clarence Filsfils
发明人： Pradosh Mohapatra , Neeraj Malhotra , Clarence Filsfils
IPC分类号： H04L12/56 , H04L12/26
CPC分类号： H04L49/70 , H04L45/22 , H04L45/50 , H04L49/25 , H04L49/557
摘要： In one embodiment, a packet switching device is configured to perform a lookup operation, based on a particular per-CE label (per-Customer Edge label) included in a particular packet, in a forwarding data structure for identifying forwarding information for the particular packet. When a corresponding outbound path is unavailable, a per-VRF (per-Virtual Routing and Forwarding) lookup operation in a VRF data structure, identified based on the particular per-CE label, based on a destination address of a packet encapsulated within the received packet. A corresponding packet is forwarded based on the results of the VRF lookup operation. In one embodiment, a set of more than one egress line card is identified based on this lookup operation, and packets of different routes are load balanced among egress line cards in this identified set of egress line cards.
摘要翻译：在一个实施例中，分组交换设备被配置为基于用于识别特定分组的转发信息的转发数据结构，基于特定分组中包括的特定每CE标签（每个客户边缘标签）来执行查找操作。当对应的出站路径不可用时，基于包含在所接收到的每个CE标签中的分组的目的地地址，基于特定的每个CE标签识别的VRF数据结构中的每VRF（每虚拟路由和转发）查找操作包。基于VRF查找操作的结果转发相应的数据包。在一个实施例中，基于该查找操作来识别一组多于一个出口线卡，并且在该识别的出口线卡组中的出口线路卡之间对不同路由的分组进行负载平衡。

13. 发明授权

US08467394B2 Automatic route tagging of BGP next-hop routes in IGP 有权
标题翻译：在IGP中自动路由标记BGP下一跳路由
公开(公告)号：US08467394B2
公开(公告)日：2013-06-18
申请号：US13149535
申请日：2011-05-31
申请人： Clarence Filsfils , Stefano B. Previdi , Jean-Philippe Vasseur
发明人： Clarence Filsfils , Stefano B. Previdi , Jean-Philippe Vasseur
IPC分类号： H04L12/28 , H04L12/56
CPC分类号： H04L45/04 , H04L45/02 , H04L45/026 , H04L45/28 , H04L45/52
摘要： In one embodiment, a router in a routing domain exchanges routing information with one or more other routers located external to the routing domain using an exterior gateway protocol (EGP). The router exchanges routing information with one or more other routers located internal to the routing domain using an interior gateway protocol (IGP). The router detects a route to be advertised by the IGP is also used as a next-hop attribute of a route advertised by the EGP. In response, the router tags the route advertised by the IGP as an important route for convergence to indicate that the tagged route is to be processed before other routes that have not been tagged during convergence processing. The tagged route is advertised within the routing domain using the IGP.
摘要翻译：在一个实施例中，路由域中的路由器使用外部网关协议（EGP）与位于路由域外部的一个或多个其他路由器交换路由信息。路由器使用内部网关协议（IGP）与位于路由域内部的一个或多个其他路由器交换路由信息。路由器检测到IGP发布的路由也被用作EGP发布的路由的下一跳属性。作为响应，路由器将IGP发布的路由标记为收敛的重要路由，以指示在收敛处理期间未标记的其他路由之前要标记的路由将被处理。使用IGP在路由域内通告标记的路由。

14. 发明申请

US20120275338A1 Selectively Populating Forwarding Information Bases in a Packet Switch 有权
标题翻译：在数据包交换机中选择性地填充转发信息库
公开(公告)号：US20120275338A1
公开(公告)日：2012-11-01
申请号：US13095846
申请日：2011-04-27
申请人： Clarence Filsfils , John H. W. Bettink , George Leonard Swallow
发明人： Clarence Filsfils , John H. W. Bettink , George Leonard Swallow
IPC分类号： H04L12/28
CPC分类号： H04L12/4625 , H04L49/252 , H04L49/3009 , H04L49/552
摘要： In one embodiment, forwarding information bases (FIBs) are selectively populated in a packet switch. A packet switching device determines, based on one or more protocol signaling messages, a subset, which is less than all, on which FIBs a lookup operation may be performed for identifying forwarding information for a received particular packet. The packet switching device populates each of these FIBs, but not all of the FIBs of the packet switching device, with forwarding information corresponding to the particular forwarding value. Thus, FIB resources are consumed for only those FIBs which could actually be used, and not all of the FIBs, for forwarding packets in the data plane of the packet switching device, whether these packets are received on a primary or backup path.
摘要翻译：在一个实施例中，转发信息库（FIB）被选择性地填充在分组交换机中。分组交换设备基于一个或多个协议信令消息确定小于全部的子集，FIB可以在哪个FIB上执行查找操作以识别接收到的特定分组的转发信息。分组交换设备填充分组交换设备中的每个FIB，但不是所有的分组交换设备的FIB，转发信息对应于特定的转发值。因此，只有那些实际可以使用的FIB，而不是所有的FIB用于在分组交换设备的数据平面中转发分组，是否在主路径或备用路径上接收到FIB资源。

15. 发明授权

US08274977B2 Distributing packets to line cards of a packet switching device based on bridge indication values received therewith 有权
标题翻译：基于与其接收的桥接指示值，将分组分组到分组交换设备的线路卡
公开(公告)号：US08274977B2
公开(公告)日：2012-09-25
申请号：US12830277
申请日：2010-07-02
申请人： Pradosh Mohapatra , Clarence Filsfils , John H. W. Bettink , Sami Boutros
发明人： Pradosh Mohapatra , Clarence Filsfils , John H. W. Bettink , Sami Boutros
IPC分类号： H04L12/28
CPC分类号： H04L45/50 , H04L45/586 , H04L49/30 , H04L49/70
摘要： A packet switching device maintains mappings of bridge identification values to line cards for each of multiple virtual bridges. When a packet is received that includes a bridge identification value, corresponding line card(s) are identified, with each being forwarded the packet. Each of these identified line cards, in response to receipt of the packet from the line card, determines whether to forward or drop the packet based on its maintained bridge table. In this manner, the original receiving line card does not need to maintain forwarding information based on destination addresses of received packets (e.g., does not need to maintain a bridge table for each virtual bridge), but rather forwards a packet to other line cards associated with the virtual bridge corresponding to the bridge identification value received in a packet.
摘要翻译：分组交换设备维护桥接标识值与多个虚拟网桥中的每一个的线路卡的映射。当接收到包含网桥标识值的分组时，识别出相应的线路卡，每个分组被转发该分组。这些识别的线路卡中的每一个响应于从线路卡接收到的分组，确定是否基于其保持的桥接表来转发或丢弃分组。以这种方式，原始接收线路卡不需要基于接收到的分组的目的地址维护转发信息（例如，不需要维护每个虚拟桥的桥表），而是将分组转发到其他线卡其中虚拟桥对应于在分组中接收的桥标识值。

16. 发明申请

US20120198064A1 USING CONTEXT LABELS TO SCALE MAC TABLES ON COMPUTER NETWORK EDGE DEVICES 有权
标题翻译：使用上下文标签在计算机网络边缘设备上规模MAC表
公开(公告)号：US20120198064A1
公开(公告)日：2012-08-02
申请号：US13018125
申请日：2011-01-31
申请人： Sami Boutros , Yuri Tsier , Muthurajah Sivabalan , Pradosh Mohapatra , Clarence Filsfils , John H. W. Bettink , Luca Martini
发明人： Sami Boutros , Yuri Tsier , Muthurajah Sivabalan , Pradosh Mohapatra , Clarence Filsfils , John H. W. Bettink , Luca Martini
IPC分类号： G06F15/173
CPC分类号： H04L45/502 , H04L12/18 , H04L45/04
摘要： In one embodiment, an access component of a local network edge device receives traffic, and generates a frame for the traffic that includes a remote context label that identifies an access component of the remote network edge device to which the traffic is to be forwarded upon arrival at the remote network edge device, and a virtual circuit label corresponding to a particular virtual service of the traffic. The local network edge device forwards the frame towards the remote network edge device. In another embodiment, the frame may be received at a core component of the remote network edge device, an in response to the remote context label identifying an access component of the remote network edge device, forwarded to the access component, which determines the particular virtual service, and forwards the traffic from the frame out the access component towards an endpoint for the traffic.
摘要翻译：在一个实施例中，本地网络边缘设备的接入组件接收业务，并且生成包括远程上下文标签的业务的帧，所述远程上下文标签识别到达所述业务将被转发到的远程网络边缘设备的接入组件在远程网络边缘设备处，以及对应于业务的特定虚拟服务的虚拟电路标签。本地网络边缘设备将帧转发到远程网络边缘设备。在另一个实施例中，可以在远程网络边缘设备的核心组件处接收帧，响应于远程上下文标签识别远程网络边缘设备的接入组件，转发到接入组件，其确定特定虚拟服务，并将来自帧的流量从访问组件转发到流量的端点。

17. 发明授权

US08165144B2 Shaper-scheduling method and system to implement prioritized policing 有权
标题翻译：整理调度方法和系统来实施优先管理
公开(公告)号：US08165144B2
公开(公告)日：2012-04-24
申请号：US11205336
申请日：2005-08-17
申请人： Mohammed Ismael Tatar , Clarence Filsfils , John Bettink
发明人： Mohammed Ismael Tatar , Clarence Filsfils , John Bettink
IPC分类号： H04L12/28 , G01R31/08
CPC分类号： H04L47/10
摘要： A scheduling method and system for a multi-level class hierarchy are disclosed. The hierarchy includes a root node linked to at least two groups. One of the groups has priority over the other of the groups and comprises at least one high priority queue and at least one low priority queue. The method includes receiving traffic at the root node, directing traffic received at the root node to one of the groups, and directing traffic received at the priority group to one of the high priority and low priority queues. Packets are accepted at the high priority queue or the low priority queue if a specified rate is not exceeded at the high and low priority queues and at least some packets are dropped at the low priority queue if the specified rate is exceeded at the high and low priority queues.
摘要翻译：公开了一种多级类层次结构的调度方法和系统。层次结构包括链接到至少两个组的根节点。组中的一个具有优于其他组的优先级，并且包括至少一个高优先级队列和至少一个低优先级队列。该方法包括在根节点接收流量，将根节点接收到的流量指向该组中的一个，并将在优先级组中接收到的流量定向到高优先级队列和低优先级队列之一。如果在高优先级队列和低优先级队列中没有超过指定的速率，则在高优先级队列或低优先级队列中接受数据包，如果高优先级队列中指定的速率超过了低优先级队列，则至少有一些数据包被丢弃优先队列。

18. 发明申请

US20120002673A1 Distributing Packets to Line Cards of a Packet Switching Device Based on Bridge Indication Values Received Therewith 有权
标题翻译：根据接收到的桥接指示值将分组分组到分组交换设备的线路卡
公开(公告)号：US20120002673A1
公开(公告)日：2012-01-05
申请号：US12830277
申请日：2010-07-02
申请人： Pradosh Mohapatra , Clarence Filsfils , John H. W. Bettink , Sami Boutros
发明人： Pradosh Mohapatra , Clarence Filsfils , John H. W. Bettink , Sami Boutros
IPC分类号： H04L12/56
CPC分类号： H04L45/50 , H04L45/586 , H04L49/30 , H04L49/70
摘要： A packet switching device maintains mappings of bridge identification values to line cards for each of multiple virtual bridges. When a packet is received that includes a bridge identification value, corresponding line card(s) are identified, with each being forwarded the packet. Each of these identified line cards, in response to receipt of the packet from the line card, determines whether to forward or drop the packet based on its maintained bridge table. In this manner, the original receiving line card does not need to maintain forwarding information based on destination addresses of received packets (e.g., does not need to maintain a bridge table for each virtual bridge), but rather forwards a packet to other line cards associated with the virtual bridge corresponding to the bridge identification value received in a packet.
摘要翻译：分组交换设备维护桥接标识值与多个虚拟网桥中的每一个的线路卡的映射。当接收到包含网桥标识值的分组时，识别出相应的线路卡，每个分组被转发该分组。这些识别的线路卡中的每一个响应于从线路卡接收到的分组，确定是否基于其保持的桥接表来转发或丢弃分组。以这种方式，原始接收线路卡不需要基于接收到的分组的目的地址维护转发信息（例如，不需要维护每个虚拟桥的桥表），而是将分组转发到其他线卡其中虚拟桥对应于在分组中接收的桥标识值。

19. 发明授权

US08077611B2 Multilevel coupled policer 有权
标题翻译：多层耦合策略器
公开(公告)号：US08077611B2
公开(公告)日：2011-12-13
申请号：US11493969
申请日：2006-07-27
申请人： John H. W. Bettink , David J. Tsiang , Clarence Filsfils
发明人： John H. W. Bettink , David J. Tsiang , Clarence Filsfils
IPC分类号： G01R31/08
CPC分类号： H04L47/10 , H04L47/20 , H04L47/215 , H04L47/2441 , H04L47/31 , H04L47/32 , H04L47/41 , Y02D50/30
摘要： A multilevel coupled policer is configured to police packets using at least two policing levels, including a first-level of class policers and a second-level aggregate policer. The multilevel coupled policer is configured to share bandwidth of the aggregate policer among packet traffic corresponding to the class policers based on the packet traffic. The multilevel coupled policer is configured to apply a particular class policer corresponding to a particular packet to identify a tentative policing action. The multilevel coupled policer is configured to apply the second-level aggregate policer to the particular packet based on the identified the tentative policing action and a result of a comparison operation of the number of tokens in one or more token buckets associated with the second-level aggregate policer and the length of the particular packet in order to determine a final policing action for marking and/or applying to the particular packet.
摘要翻译：多层耦合监管器配置为使用至少两个监管级别来警告数据包，包括第一级类策略器和二级聚合策略器。多级耦合监控器被配置为基于分组流量来共享与类策略器相对应的分组业务中的聚合策略器的带宽。多级耦合策略器被配置为应用与特定分组相对应的特定类策略器以识别临时策略动作。多级耦合策略器被配置为基于所识别的临时策略动作将第二级聚合策略器应用于特定分组，并且与第二级相关联的一个或多个令牌桶中的令牌数量的比较操作的结果聚合策略器和特定分组的长度，以便确定用于标记和/或应用于特定分组的最终策略动作。

20. 发明授权

US08000251B2 Instrumenting packet flows 有权
标题翻译：测试数据包流
公开(公告)号：US08000251B2
公开(公告)日：2011-08-16
申请号：US11985239
申请日：2007-11-14
申请人： Garry Paul Epps , David Delano Ward , John H. W. Bettink , Christopher Yates Satterlee , Mohammed Ismael Tatar , Clarence Filsfils
发明人： Garry Paul Epps , David Delano Ward , John H. W. Bettink , Christopher Yates Satterlee , Mohammed Ismael Tatar , Clarence Filsfils
IPC分类号： H04L1/00 , H04L12/26 , H04L12/28 , H04L12/56
CPC分类号： H04L41/5009 , H04L41/5003 , H04L43/0829 , H04L43/0852 , H04L43/087 , H04L43/16
摘要： Real-time customer packet traffic is instrumented to determine measured delays between two or more points along a path actually traveled by a packet, such as within or external to one or more packet switching devices. These measurements may include delays within a packet switching device other than the ingress and egress time of a packet. These measured delays can be used to determine whether or not the performance of a packet switching device or network meets desired levels, especially for complying with a Service Level Agreement.
摘要翻译：测量实时客户数据包流量以确定沿着由分组实际行进的路径（例如在一个或多个分组交换设备之内或之外）的两个或多个点之间的测量延迟。这些测量可以包括分组交换设备内的不同于分组的入口和出口时间的延迟。这些测量的延迟可以用于确定分组交换设备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。

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