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1. 发明授权

US08837479B1 Fast reroute between redundant multicast streams 有权
标题翻译：在冗余组播流之间快速重路由
公开(公告)号：US08837479B1
公开(公告)日：2014-09-16
申请号：US13533967
申请日：2012-06-27
申请人： Nitin Kumar , Nischal Sheth , Satish Ramachandran , Robert Kebler , Maciek Konstantynowicz
发明人： Nitin Kumar , Nischal Sheth , Satish Ramachandran , Robert Kebler , Maciek Konstantynowicz
IPC分类号： H04L12/24 , H04L12/28
CPC分类号： H04L45/28 , H04L12/1877 , H04L45/24
摘要： A packet-forwarding integrated circuit includes a control logic module and a selector block configured to produce a value indicating an incoming interface associated with a multicast data stream that meets stream health requirements, wherein the multicast data stream is one of a plurality of redundant multicast data streams each received on different incoming interfaces, wherein based on the value produced by the selector block the control logic module outputs data packets of the multicast data stream that meets stream health requirements received on the incoming interface, and discards data packets of other multicast data streams received on other incoming interfaces not indicated by the selector block. In response to detecting that a quality of one of the redundant multicast data streams has fallen below a configured threshold, the control logic automatically rewrites the selector block to forward a different one of the redundant multicast data streams.
摘要翻译：分组转发集成电路包括控制逻辑模块和选择器块，其被配置为产生指示与满足流健康要求的多播数据流相关联的输入接口的值，其中多播数据流是多个冗余多播数据之一每个在不同输入接口上接收的流，其中，基于由选择器块产生的值，控制逻辑模块输出满足在入接口上接收的流健康要求的多播数据流的数据分组，并丢弃其他多播数据流的数据分组在未由选择器块指示的其他输入接口上接收。响应于检测到冗余多播数据流中的一个的质量已经低于配置的阈值，则控制逻辑自动重写该选择器块以转发不同的冗余多播数据流。

2. 发明授权

US08958286B1 Fast reroute for multicast using maximally redundant trees 有权
标题翻译：使用最大冗余树快速重新路由多播
公开(公告)号：US08958286B1
公开(公告)日：2015-02-17
申请号：US13418212
申请日：2012-03-12
申请人： Alia Atlas , Maciek Konstantynowicz , Robert Kebler
发明人： Alia Atlas , Maciek Konstantynowicz , Robert Kebler
IPC分类号： H04J1/16 , H04J3/14 , H04L12/28
CPC分类号： H04L12/18 , H04L45/12 , H04L45/16
摘要： Network devices provide Internet Protocol (IP) and Label Distribution Protocol (LDP) fast reroute for unicast and multicast traffic. The approach described herein for fast reroute for IP and LDP uses maximally redundant trees (MRTs). MRTs are a pair of trees where the path from any node X to the root R along the first tree and the path from the same node X to the root along the second tree share the minimum number of nodes and the minimum number of links. A network device, such as a router, computes a pair of MRTs for each destination and installs one or more MRT alternate next-hops in its forwarding plane for use in forwarding network traffic to a destination in the event a failure occurs that renders a primary next-hop unusable for reaching the destination.
摘要翻译：网络设备为单播和组播流量提供了Internet协议（IP）和标签分发协议（LDP）快速重路由。本文描述的用于IP和LDP快速重路由的方法使用最大限度的冗余树（MRT）。 MRT是一对树，其中沿着第一树从任何节点X到根R的路径以及沿着第二树从相同节点X到根的路径共享最小节点数和最小链路数。诸如路由器的网络设备为每个目的地计算一对MRT，并且在其转发平面中安装一个或多个MRT备用下一跳，以便在发生故障的情况下将网络流量转发到目的地，从而使主下一跳不可用于到达目的地。

3. 发明授权

US09088519B2 Allocating and distributing labels for packet encapsulation 有权
标题翻译：分配和分发报文封装标签
公开(公告)号：US09088519B2
公开(公告)日：2015-07-21
申请号：US13525073
申请日：2012-06-15
申请人： James Guichard , David Ward , Jan Medved , Maciek Konstantynowicz
发明人： James Guichard , David Ward , Jan Medved , Maciek Konstantynowicz
IPC分类号： H04L12/723 , H04L12/46
CPC分类号： H04L45/50 , H04L12/4645 , H04L45/507
摘要： In one example, a network device receives a packet to be forwarded according to a label switching protocol, determines a service to be performed on the packet by a service network device, sends a label request message to the service network device, wherein the label request message indicates support for labels having a particular length, wherein the particular length is larger than twenty bits (e.g., forty bits), and wherein the label request message specifies the service to be performed on the packet, receives, in response to the label request message, a label mapping message defining a label of the particular length, appends the label to the packet to form a Multi-Protocol Label Switching (MPLS)-encapsulated packet, and forwards the MPLS-encapsulated packet according to the label switching protocol.
摘要翻译：在一个示例中，网络设备根据标签交换协议接收要转发的分组，由服务网络设备确定要在分组上执行的服务，向服务网络设备发送标签请求消息，其中标签请求消息指示对具有特定长度的标签的支持，其中特定长度大于二十位（例如，四十位），并且其中标签请求消息指定要对分组执行的服务，响应于标签请求而接收消息，定义特定长度的标签的标签映射消息，将标签附加到分组以形成多协议标签交换（MPLS）封装的分组，并根据标签交换协议转发MPLS封装的分组。

4. 发明授权

US09100206B1 Seamless architecture for cable access networks 有权
标题翻译：电缆接入网络的无缝架构
公开(公告)号：US09100206B1
公开(公告)日：2015-08-04
申请号：US13436418
申请日：2012-03-30
申请人： Colby Barth , David Ward , Maciek Konstantynowicz
发明人： Colby Barth , David Ward , Maciek Konstantynowicz
IPC分类号： H04L12/28 , H04L29/06
CPC分类号： H04L12/2801 , H04L29/06176 , H04L45/308
摘要： In general techniques are described for applying differentiated services with a customer-aware network device. A network device comprising a control unit and an interface may implement the techniques. The interface receives a network packet that is associated with first and second labels. The first label uniquely identifies a Cable Modem Termination System (CMTS) within a plurality of CMTSs. The second label uniquely identifies one of a plurality of CPE devices coupled to the CMTS. The control unit determines at least one subscriber-specific service associated with the one of the plurality of CPE devices based at least in part on the first and second labels associated with the labeled network packet. The at least one subscriber-specific service comprises a service associated with the one of the plurality of CPE devices. The control unit applies the at least one subscriber-specific service to the labeled network packet received from the CMTS.
摘要翻译：一般来说，描述了将差分服务与客户感知网络设备一起使用的技术。包括控制单元和接口的网络设备可以实现这些技术。该接口接收与第一和第二标签相关联的网络分组。第一标签唯一地标识多个CMTS内的有线调制解调器终端系统（CMTS）。第二标签唯一地标识耦合到CMTS的多个CPE设备中的一个。控制单元至少部分地基于与标记的网络分组相关联的第一和第二标签来确定与多个CPE设备中的一个相关联的至少一个订户特定服务。所述至少一个订户特定服务包括与所述多个CPE设备中的一个相关联的服务。控制单元将至少一个用户特定服务应用于从CMTS接收的标记网络分组。

5. 发明授权

US08711838B1 Using network labels without standard-defined syntax and semantics 有权
标题翻译：使用没有标准定义语法和语义的网络标签
公开(公告)号：US08711838B1
公开(公告)日：2014-04-29
申请号：US13243310
申请日：2011-09-23
申请人： James Guichard , David Ward , Jan Medved , Maciek Konstantynowicz
发明人： James Guichard , David Ward , Jan Medved , Maciek Konstantynowicz
IPC分类号： H04L12/28
CPC分类号： H04L12/4633 , H04L12/4645
摘要： In general, techniques are described for transmitting MPLS labels over a network. More specifically, a network device such a router receives a packet to be forwarded according to a label switching protocol, such as Multi-Protocol Label Switching (MPLS). The router may determine a service instance for the packet based on a client device from which the packet originated. The network device may determine one or more services to apply to the packet based on the service instance for the packet and generate a label which having a service instance portion and a service information portion. The network device may append the label to the packet to form an MPLS-encapsulated packet, and may forward the MPLS-encapsulated packet via an output interface according to the label switching protocol.
摘要翻译：通常，描述了通过网络传输MPLS标签的技术。更具体地，诸如路由器的网络设备根据诸如多协议标签交换（MPLS）的标签交换协议来接收要转发的分组。路由器可以基于从其发起分组的客户端设备来确定分组的服务实例。网络设备可以基于分组的服务实例来确定应用于分组的一个或多个服务，并且生成具有服务实例部分和服务信息部分的标签。网络设备可以将标签附加到分组，形成MPLS封装的分组，并且可以根据标签交换协议经由输出接口转发MPLS封装的分组。

6. 发明申请

US20140003232A1 FEEDBACK LOOP FOR SERVICE ENGINEERED PATHS 有权
标题翻译：服务工程师的反馈环
公开(公告)号：US20140003232A1
公开(公告)日：2014-01-02
申请号：US13534121
申请日：2012-06-27
申请人： James Guichard , David Ward , Jan Medved , Maciek Konstantynowicz
发明人： James Guichard , David Ward , Jan Medved , Maciek Konstantynowicz
IPC分类号： H04L12/24 , H04L12/56
CPC分类号： H04L67/1008 , H04L67/1025 , H04L67/1029 , H04L67/16 , H04L67/327
摘要： In general, techniques are described for providing feedback loops for service engineered paths. A service node comprising an interface and a control unit may implement the techniques. The interface receives traffic via a path configured within a network to direct the traffic from an ingress network device of the path to the service node. The control unit applies one or more services to the traffic received via the path and generates service-specific information related to the application of the one or more services to the traffic. The interface then sends the service-specific information to at least one network device configured to forward the traffic via the path so that the at least one network device configured to forward the traffic via the path is able to adapt the path based on the service-specific information.
摘要翻译：通常，描述了为服务工程路径提供反馈回路的技术。包括接口和控制单元的服务节点可以实现这些技术。该接口通过网络中配置的路径接收流量，将流量从路由入口网络设备引导到业务节点。控制单元将一个或多个服务应用于经由路径接收到的业务，并且生成与该业务相关的一个或多个业务的应用相关的业务特定信息。接口然后将服务特定信息发送到被配置为经由路径转发流量的至少一个网络设备，使得配置成经由路径转发流量的至少一个网络设备能够基于服务 - 具体信息。

7. 发明授权

US09143557B2 Feedback loop for service engineered paths 有权
标题翻译：服务工程路径的反馈回路
公开(公告)号：US09143557B2
公开(公告)日：2015-09-22
申请号：US13534121
申请日：2012-06-27
申请人： James Guichard , David Ward , Jan Medved , Maciek Konstantynowicz
发明人： James Guichard , David Ward , Jan Medved , Maciek Konstantynowicz
IPC分类号： H04L12/28 , H04L29/08
CPC分类号： H04L67/1008 , H04L67/1025 , H04L67/1029 , H04L67/16 , H04L67/327
摘要： In general, techniques are described for providing feedback loops for service engineered paths. A service node comprising an interface and a control unit may implement the techniques. The interface receives traffic via a path configured within a network to direct the traffic from an ingress network device of the path to the service node. The control unit applies one or more services to the traffic received via the path and generates service-specific information related to the application of the one or more services to the traffic. The interface then sends the service-specific information to at least one network device configured to forward the traffic via the path so that the at least one network device configured to forward the traffic via the path is able to adapt the path based on the service-specific information.
摘要翻译：通常，描述了为服务工程路径提供反馈回路的技术。包括接口和控制单元的服务节点可以实现这些技术。该接口通过网络中配置的路径接收流量，将流量从路由入口网络设备引导到业务节点。控制单元将一个或多个服务应用于经由路径接收到的业务，并且生成与该业务相关的一个或多个业务的应用相关的业务特定信息。接口然后将服务特定信息发送到被配置为经由路径转发流量的至少一个网络设备，使得配置成经由路径转发流量的至少一个网络设备能够基于服务 - 具体信息。

8. 发明授权

US09270426B1 Constrained maximally redundant trees for point-to-multipoint LSPs 有权
标题翻译：用于点对多点LSP的约束最大冗余树
公开(公告)号：US09270426B1
公开(公告)日：2016-02-23
申请号：US13610520
申请日：2012-09-11
申请人： Alia Atlas , Maciek Konstantynowicz
发明人： Alia Atlas , Maciek Konstantynowicz
IPC分类号： H04L12/28 , H04L5/00 , H04W72/04
CPC分类号： H04L5/001 , H04L5/0044 , H04L5/0053 , H04L45/1283 , H04L45/1287 , H04L45/48 , H04L45/50 , H04W72/0466
摘要： A network device computes a set of maximally redundant trees from an ingress network device to a plurality of egress network devices based on a network graph, in which each of the set of maximally redundant trees comprises a spanning tree to the plurality of egress network devices rooted at the network device. The network device computes the maximally redundant trees such that each of the links along each of the set of maximally redundant trees satisfies a specified traffic-engineering constraint. The ingress network device establishes a plurality of point to multipoint (P2MP) label switched paths (LSPs) from the network device as an ingress network device to the plurality of egress network devices along the set of maximally redundant trees, wherein each of the P2MP LSPs corresponds to a different one of the maximally redundant trees.
摘要翻译：网络设备基于网络图计算从入口网络设备到多个出口网络设备的最大冗余树的集合，其中所述最大冗余树中的每一个包括根据所述多个出口网络设备的生成树在网络设备。网络设备计算最大冗余树，使得沿着最大冗余树中的每一组的每个链路满足特定的交通工程约束。入口网络设备沿着最大冗余树组建立从网络设备作为入口网络设备到多个出口网络设备的多个点对多点（P2MP）标签交换路径（LSP），其中每个P2MP LSP 对应于最大冗余树中的不同的一个。

9. 发明申请

US20130336315A1 ALLOCATING AND DISTRIBUTING LABELS FOR PACKET ENCAPSULATION 有权
标题翻译：分发和分发标签进行包装封装
公开(公告)号：US20130336315A1
公开(公告)日：2013-12-19
申请号：US13525073
申请日：2012-06-15
申请人： James Guichard , David Ward , Jan Medved , Maciek Konstantynowicz
发明人： James Guichard , David Ward , Jan Medved , Maciek Konstantynowicz
IPC分类号： H04L12/56
CPC分类号： H04L45/50 , H04L12/4645 , H04L45/507
摘要： In one example, a network device receives a packet to be forwarded according to a label switching protocol, determines a service to be performed on the packet by a service network device, sends a label request message to the service network device, wherein the label request message indicates support for labels having a particular length, wherein the particular length is larger than twenty bits (e.g., forty bits), and wherein the label request message specifies the service to be performed on the packet, receives, in response to the label request message, a label mapping message defining a label of the particular length, appends the label to the packet to form a Multi-Protocol Label Switching (MPLS)-encapsulated packet, and forwards the MPLS-encapsulated packet according to the label switching protocol.
摘要翻译：在一个示例中，网络设备根据标签交换协议接收要转发的分组，由服务网络设备确定要在分组上执行的服务，向服务网络设备发送标签请求消息，其中标签请求消息指示对具有特定长度的标签的支持，其中特定长度大于二十位（例如，四十位），并且其中标签请求消息指定要对分组执行的服务，响应于标签请求而接收消息，定义特定长度的标签的标签映射消息，将标签附加到分组以形成多协议标签交换（MPLS）封装的分组，并根据标签交换协议转发MPLS封装的分组。

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