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1. 发明申请

US20070253416A1 Method and apparatus for forwarding label distribution protocol multicast traffic during fast reroute 有权
标题翻译：在快速重路由期间转发标签分发协议组播流量的方法和装置
公开(公告)号：US20070253416A1
公开(公告)日：2007-11-01
申请号：US11413252
申请日：2006-04-28
申请人： Alex Raj
发明人： Alex Raj
IPC分类号： H04J1/16 , H04L12/56 , H04L12/28 , H04J3/26
CPC分类号： H04L45/16 , H04L45/02 , H04L45/22 , H04L45/28 , H04L45/507
摘要： A computer apparatus comprising a processor and a forwarding engine arranged to forward LDP multicast traffic along a multicast tree having a primary and a backup path in a converged network topology, the processor being configured to cause the forwarding engine to forward traffic via the backup path upon a topology change and send a changed topology label and path vector to at least one neighbor node in the changed topology.
摘要翻译：一种计算机装置，包括处理器和转发引擎，所述转发引擎被布置为沿着具有主和备用路径的融合网络拓扑中的多播树转发LDP多播流量，所述处理器被配置为使所述转发引擎经由所述备份路径转发流量拓扑变化，并将更改的拓扑标签和路径向量发送到已更改拓扑中的至少一个邻居节点。

2. 发明申请

US20070036072A1 Method and apparatus using multiprotocol label switching (MPLS) label distribution protocol (LDP) to establish label switching paths (LSPS) for directed forwarding 有权
标题翻译：使用多协议标签交换（MPLS）标签分发协议（LDP）建立用于定向转发的标签交换路径（LSPS）的方法和装置
公开(公告)号：US20070036072A1
公开(公告)日：2007-02-15
申请号：US11203801
申请日：2005-08-15
申请人： Alex Raj , Robert Thomas , Prabhu Vaithilingam
发明人： Alex Raj , Robert Thomas , Prabhu Vaithilingam
IPC分类号： H04L1/00
CPC分类号： H04L45/22 , H04L45/00 , H04L45/02 , H04L45/28 , H04L45/50
摘要： A method and apparatus method for providing fast rerouting in a network is presented. The method and apparatus assign a first local label for a prefix, and assign a second local label for the prefix. The first local label is advertised to an upstream peer and the second local label is advertised to a downstream peer. A forwarding entry from the first local label for a prefix is switched to the second local label for the prefix when a failure of a link or next hop is detected.
摘要翻译：提出了一种在网络中提供快速重路由的方法和装置方法。方法和装置为前缀分配第一本地标签，并为前缀分配第二本地标签。将第一个本地标签通告给上游对等体，并将第二个本地标签通告给下游对等体。当检测到链路或下一跳的故障时，来自前缀的第一本地标签的转发表项被切换到前缀的第二本地标签。

3. 发明授权

US06373822B1 Data network protocol conformance test system 有权
标题翻译：数据网络协议一致性测试系统
公开(公告)号：US06373822B1
公开(公告)日：2002-04-16
申请号：US09227554
申请日：1999-01-08
申请人： Alex Raj , Hseu-Chuan Tsai , John F. McGlauphlin , David Snay
发明人： Alex Raj , Hseu-Chuan Tsai , John F. McGlauphlin , David Snay
IPC分类号： H04L1226
CPC分类号： H04L1/243 , H04L69/03
摘要： A modular data network protocol conformance test system is designed to make distinct the key functionality that is required in protocol conformance testing such that the system can be reused across different platform testing, protocol testing, and network topology. As a result, in its current design, it can be used to test devices as distinct as cable modems, routers, and tag-switching routers. Consequently, the system has a packet generation module that generates send packets for transmission to the UUT (unit under test) and that analyzes the receive packets from the UUT. A separate network handling module transfers the send packets to and acquires the receive packets from the UUT. 13
摘要翻译：模块化数据网络协议一致性测试系统旨在使协议一致性测试中所需的关键功能不同，从而可以在不同的平台测试，协议测试和网络拓扑之间重用系统。因此，在目前的设计中，它可用于测试与电缆调制解调器，路由器和标签交换路由器不同的设备。因此，该系统具有生成发送分组以发送到UUT（被测单元）并且分析来自UUT的接收分组的分组生成模块。单独的网络处理模块将发送分组传送到并从UUT获取接收分组。 13

4. 发明授权

US07969898B1 Technique for breaking loops in a communications network 有权
标题翻译：在通信网络中断开环路的技术
公开(公告)号：US07969898B1
公开(公告)日：2011-06-28
申请号：US11716055
申请日：2007-03-09
申请人： Alex Raj , Robert H. Thomas , Anna Charny , Prabhu Vaithilingam
发明人： Alex Raj , Robert H. Thomas , Anna Charny , Prabhu Vaithilingam
IPC分类号： H04L12/26
CPC分类号： H04L12/462 , H04L45/00 , H04L45/18 , H04L45/50
摘要： A technique for breaking a loop caused by looping alternate paths associated with a prefix in a communications network. One or more non-looping alternate paths associated with the prefix that exclude a first node in the communications network are identified. One or more alternate paths from nodes in the loop that are associated with the prefix are identified. An identified path that intersects with an identified non-looping path is established as an alternate path associated with the prefix at a node in the loop.
摘要翻译：一种用于通过循环与通信网络中的前缀相关联的备用路径导致的循环的技术。识别与排除通信网络中的第一节点的前缀相关联的一个或多个非循环备用路径。识别与该前缀相关联的来自循环中的节点的一个或多个备选路径。与识别的非循环路径相交的识别路径被建立为与循环中的节点处的前缀相关联的备用路径。

5. 发明申请

US20070174483A1 Methods and apparatus for implementing protection for multicast services 审中-公开
标题翻译：实现组播业务保护的方法和装置
公开(公告)号：US20070174483A1
公开(公告)日：2007-07-26
申请号：US11336457
申请日：2006-01-20
申请人： Alex Raj , Robert Thomas
发明人： Alex Raj , Robert Thomas
IPC分类号： G06F15/173
CPC分类号： H04L41/0668 , H04L12/18 , H04L45/00 , H04L45/02 , H04L45/16 , H04L45/22 , H04L45/28 , H04L45/50
摘要： A router in a label-switching network sets up one or more backup paths to forward multicast data traffic in the event of a failure. Network failures include link failures and node failures. If a link failure occurs, a given router in a respective label-switching network can forward multicast data traffic on a first backup path to a next hop downstream router that it normally sends the multicast data traffic. If the next hop downstream router fails, the given router can circumvent sending the multicast data traffic to the next hop downstream router and instead send the multicast data traffic on respective backup paths to the set of routers (e.g., next next hop downstream routers) that the next hop downstream router (e.g., the failing router) normally would forward the multicast data traffic in the absence of the network failure.
摘要翻译：标签交换网络中的路由器设置一个或多个备份路径，以在发生故障时转发组播数据流量。网络故障包括链路故障和节点故障。如果发生链路故障，相应的标签交换网络中的给定路由器可以将第一备份路径上的组播数据流量转发到正常发送组播数据业务的下一跳下游路由器。如果下一跳下游路由器发生故障，则给定的路由器可以规避向下一跳下游路由器发送组播数据流量，而是将相应备份路径上的组播数据流量发送到路由器集合（例如下一个下一跳下游路由器）下一跳下游路由器（例如，故障路由器）通常会在没有网络故障的情况下转发组播数据流量。

6. 发明申请

US20070217420A1 Method and apparatus for distributing labels in a label distribution protocol multicast network 有权
标题翻译：在标签分发协议组播网络中分发标签的方法和装置
公开(公告)号：US20070217420A1
公开(公告)日：2007-09-20
申请号：US11377807
申请日：2006-03-16
申请人： Alex Raj , Eric Rosen , Robert Thomas , IJsbrand Wijnands
发明人： Alex Raj , Eric Rosen , Robert Thomas , IJsbrand Wijnands
IPC分类号： H04L12/56
CPC分类号： H04L45/02 , H04L45/00 , H04L45/18 , H04L45/507
摘要： A method of distributing labels in a label distribution protocol multicast network having a root node and at least one leaf node comprises the steps, performed at a receiving node, of receiving a label and path vector from a distributing node, carrying out loop or convergence detection from the received path vector and, if convergence or no loop is detected, sending a receiving node label and path vector to its nexthop node in the network.
摘要翻译：在具有根节点和至少一个叶节点的标签分发协议组播网络中分发标签的方法包括在接收节点执行的从分发节点接收标签和路径向量的步骤，执行循环或收敛检测从接收到的路径向量中，如果检测到收敛或无环路，则向网络中的下一跳节点发送接收节点标签和路径向量。

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