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    Interworking between MPLS/IP and Ethernet OAM mechanisms
    1.
    发明申请
    Interworking between MPLS/IP and Ethernet OAM mechanisms 有权
    MPLS / IP和以太网OAM机制之间的互通

    公开(公告)号：US20080285466A1

    公开(公告)日：2008-11-20

    申请号：US11804615

    申请日：2007-05-19

    申请人： Samer M. Salam ,  Thomas D. Nadeau ,  Luca Martini ,  Ali Sajassi

    发明人： Samer M. Salam ,  Thomas D. Nadeau ,  Luca Martini ,  Ali Sajassi

    IPC分类号： H04L12/26 ,  H04L12/24

    CPC分类号： H04L41/06 ,  H04L41/0226 ,  H04L45/50 ,  H04L67/28 ,  H04L67/2861 ,  H04L69/40

    摘要： In one embodiment, a method includes receiving, by a provider edge (PE) device, a transport layer status message indicative of a defect on a pseudowire (PW) running across a core of a service provider (SP) network. The status message is translated to a service layer message indicative of the defect. The service layer message is then transmitted across an access domain of the SP network. It is emphasized that this abstract is provided to comply with the rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure.

    摘要翻译： 在一个实施例中，一种方法包括由提供商边缘（PE）设备接收指示在跨服务提供商（SP）网络的核心运行的伪线（PW）上的缺陷的传输层状态消息。 状态消息被转换为指示缺陷的服务层消息。 服务层消息然后通过SP网络的接入域传输。 要强调的是，该摘要被提供以符合要求抽象的规则，允许搜索者或其他读者快速确定技术公开内容的主题。

    Method for auto-routing of multi-hop pseudowires
    3.
    发明授权
    Method for auto-routing of multi-hop pseudowires 有权
    多跳伪线自动路由的方法

    公开(公告)号：US07408941B2

    公开(公告)日：2008-08-05

    申请号：US11152523

    申请日：2005-06-14

    申请人： Luca Martini ,  Keyur Patel ,  Thomas D. Nadeau ,  James N. Guichard

    发明人： Luca Martini ,  Keyur Patel ,  Thomas D. Nadeau ,  James N. Guichard

    IPC分类号： H04L12/28 ,  H04L12/66 ,  G06F15/16 ,  G06F15/173

    CPC分类号： H04L45/50 ,  H04L45/04

    摘要： A method and computer system for auto-routing of multi-hop pseudowires is presented. A first Provider Edge (PE) device receives an advertisement from a layer 2 (L2) capable network device, the advertisement including routing state for reaching the L2 device. A first Border Gateway Protocol (BGP) table is populated with the routing state for the L2 capable network device which is reachable by way of an address family reserved for L2 end point reachability information. The first PE device advertises the first BGP table information within a first Service Provider (SP) network such that a multi-hop Pseudowire is capable of being established which includes the L2 capable device.

    摘要翻译： 提出了一种用于多跳伪线自动路由的方法和计算机系统。 第一提供商边缘（PE）设备从具有层2（L2）的网络设备接收广告，该广告包括到达L2设备的路由状态。 第一个边界网关协议（BGP）表填充有L2能力的网络设备的路由状态，该路由状态可以通过为L2端点可达性信息保留的地址族可达。 第一PE设备在第一服务提供商（SP）网络内通告第一BGP表信息，使得能够建立包括L2能力设备的多跳伪线。

    System and methods for network reachability detection
    4.
    发明授权
    System and methods for network reachability detection 有权
    网络可达性检测的系统和方法

    公开(公告)号：US07990888B2

    公开(公告)日：2011-08-02

    申请号：US11072082

    申请日：2005-03-04

    申请人： Thomas D. Nadeau ,  Azhar Mohammed Sayeed ,  Michael T. Piecuch ,  James N. Guichard ,  Jean-Phillipe Vasseur ,  George L. Swallow

    发明人： Thomas D. Nadeau ,  Azhar Mohammed Sayeed ,  Michael T. Piecuch ,  James N. Guichard ,  Jean-Phillipe Vasseur ,  George L. Swallow

    IPC分类号： H04L12/28 ,  H04L12/56

    CPC分类号： H04L43/50 ,  H04L45/04 ,  H04L45/36 ,  H04L45/50 ,  H04L69/16

    摘要： A mechanism for ASBRs to identify the originating node, or router, in an LSP conversant autonomous system (AS), such as an MPLS VPN environment, maintains the identity of the originating node and successive nodes in subsequent autonomous systems along the path to the node to be pinged. The identity of the transporting nodes is stored in a stack or other object associated with the ping request (ping), such that the pinged node may employ the stored identity as a set of return path routing information. Successive ASBRs store their identity on the stack, in an ordered manner, along the path to the destination. Upon reaching the destination (ping) node, the destination node employs the identity of the first node on the stack to send the acknowledgment, or ping response. Each successive ASBR, therefore, pops (retrieves) the next node identity from the stack and redirects (sends) the ping response to the retrieved node.

    摘要翻译： 用于识别LSP熟练自治系统（AS）（例如MPLS VPN环境）中的始发节点或路由器的机制在沿着节点的路径的后续自治系统中维护始发节点和连续节点的身份 要ping 传输节点的身份存储在与ping请求（ping）相关联的堆栈或其他对象中，使得被ping过的节点可以将所存储的身份用作一组返回路径路由信息。 连续的ASBR将按照有序的方式将其身份存储在堆栈中，沿着目的地的路径。 在到达目的地（ping）节点时，目的地节点采用栈上的第一个节点的身份来发送确认或ping响应。 因此，每个连续的ASBR从堆栈中弹出（检索）下一个节点标识，并将ping响应重定向（发送）到检索到的节点。

    Optimal automated exploration of hierarchical multiprotocol label switching label switch paths
    5.
    发明授权
    Optimal automated exploration of hierarchical multiprotocol label switching label switch paths 有权
    分层多协议标签交换标签交换路径的最佳自动化探索

    公开(公告)号：US08116227B1

    公开(公告)日：2012-02-14

    申请号：US11642473

    申请日：2006-12-20

    申请人： Danny Prairie ,  Yufei Shi ,  George Swallow ,  Thomas D. Nadeau ,  Vanson Lim ,  Jean-Philippe Vasseur

    发明人： Danny Prairie ,  Yufei Shi ,  George Swallow ,  Thomas D. Nadeau ,  Vanson Lim ,  Jean-Philippe Vasseur

    IPC分类号： H04L12/28 ,  H04L12/56

    CPC分类号： H04L45/50 ,  H04L45/24

    摘要： Optimal automated exploration of hierarchical MPLS LSPs is disclosed. A path verification message (PVM) is transmitted from an initial router. Each label in the PVM's label stack corresponds to a hierarchy layer and is associated with a time-to-live (TTL) field. The TTL field for the label of a current layer is set so the PVM travels one hop from the initial router. In response, a reply message indicating that the PVM reached its destination is received. These steps are then repeated. For each successive PVM transmitted, the TTL field associated with a label corresponding to the current hierarchy layer is incremented. For any reply message including information describing a non-current layer, modify the next PVM's label stack and increment the TTL field of the label for the described different layer; any other TTL fields are unchanged. If any received reply message indicates a destination router was reached, the process terminates.

    摘要翻译： 公开了分层MPLS LSP的最佳自动化探索。 从初始路由器发送路径验证消息（PVM）。 PVM标签堆栈中的每个标签对应于层次结构层，并与生存时间（TTL）字段相关联。 当前层的标签的TTL字段设置为使PVM从初始路由器传播一跳。 作为响应，接收到指示PVM到达其目的地的应答消息。 然后重复这些步骤。 对于发送的每个连续的PVM，与当前层级层相对应的标签相关联的TTL字段递增。 对于包含描述非当前层的信息的任何回复消息，修改下一个PVM的标签栈，并增加描述的不同层的标签的TTL字段; 任何其他TTL字段都不变。 如果任何接收到的回复消息指示到达目的地路由器，则该过程终止。

    DETECTION OF SPECIFIC BFD PATH FAILURES
    7.
    发明申请
    DETECTION OF SPECIFIC BFD PATH FAILURES 有权
    检测特定BFD路径故障

    公开(公告)号：US20080247324A1

    公开(公告)日：2008-10-09

    申请号：US11697571

    申请日：2007-04-06

    申请人： Thomas D. Nadeau ,  Danny Prairie ,  George Swallow ,  Reshad Rahman

    发明人： Thomas D. Nadeau ,  Danny Prairie ,  George Swallow ,  Reshad Rahman

    IPC分类号： H04L12/26

    CPC分类号： H04L41/12 ,  H04L45/02 ,  H04L45/28 ,  H04L45/50

    摘要： Improved detection of specific BFD LSP path failures is herein disclosed. The improved detection described herein allow for faster fault isolation of a failure along a LSP path, which in turn may allow for faster repair of the failure. When opening a BFD session with a LSP egress node, the LSP ingress node provides the LSP egress node a path descriptor along with the BFD Discriminator. If a BFD failure is detected at the LSP egress node, the LSP egress node can signal an alarm that includes a full description of the path.

    摘要翻译： 本文公开了对特定BFD LSP路径故障的改进的检测。 这里描述的改进的检测允许沿着LSP路径的故障的更快的故障隔离，这进而可以允许更快地修复故障。 当与LSP出口节点打开BFD会话时，LSP入口节点向LSP出口节点提供与BFD鉴别器一起的路径描述符。 如果在LSP出口节点检测到BFD故障，则LSP出口节点可以发出包含路径完整描述的告警信号。

    Method and apparatus for diagnosing a fault in a network path
    8.
    发明授权
    Method and apparatus for diagnosing a fault in a network path 有权
    用于诊断网络路径中的故障的方法和装置

    公开(公告)号：US07983174B1

    公开(公告)日：2011-07-19

    申请号：US11313283

    申请日：2005-12-19

    申请人： John Monaghan ,  Thomas D. Nadeau ,  Sam K. Aldrin

    发明人： John Monaghan ,  Thomas D. Nadeau ,  Sam K. Aldrin

    IPC分类号： G01R31/08

    CPC分类号： H04L43/0817 ,  H04L43/10 ,  H04L45/50

    摘要： A method of diagnosing a fault in a network path comprises the steps, performed at a diagnosing node, of initiating a path discovery test. The diagnosing node receives at least one path discovery test response and identifies the diagnosable node on the network path from a path discovery test response. The diagnosing node remotely accesses said diagnosable node and performs a diagnostic routine at said diagnosable node.

    摘要翻译： 诊断网络路径中的故障的方法包括在诊断节点执行的启动路径发现测试的步骤。 诊断节点接收至少一个路径发现测试响应，并从路径发现测试响应中识别网络路径上的可诊断节点。 诊断节点远程访问所述可诊断节点并在所述可诊断节点执行诊断例程。

    Method and apparatus for packet loss detection
    9.
    发明授权
    Method and apparatus for packet loss detection 有权
    分组丢失检测的方法和装置

    公开(公告)号：US07773611B2

    公开(公告)日：2010-08-10

    申请号：US11153649

    申请日：2005-06-15

    申请人： Earl Hardin Booth, III ,  W. Mark Townsley ,  Thomas D. Nadeau

    发明人： Earl Hardin Booth, III ,  W. Mark Townsley ,  Thomas D. Nadeau

    IPC分类号： H04L12/28

    CPC分类号： H04L43/0829 ,  H04L41/5003 ,  H04L41/5009 ,  H04L41/5035 ,  H04L43/0811 ,  H04L43/0888 ,  H04L43/10 ,  H04L43/16

    摘要： Conventional network packet traffic loss/drop monitoring mechanisms, such as that employed for pseudowire, IP flow and tunnel traffic monitoring, do not process or diagnose the aggregate counts from both endpoints of a particular pseudowire. A packet loss and detection mechanism periodically exchanges traffic packet counts to maintain an accurate diagnosis of the pseudowire health from either endpoint. Further, the raw packet counts are analyzed to identify misrouted and lost packets, as both should be considered to assess network health and congestion. The pseudowire statistics are maintained for each pseudowire emanating from a particular edge router, providing a complete view of pseudowire traffic affecting a particular edge router. Such statistics are beneficial for problem detection, diagnosis, and for verification of throughput criteria such as those expressed in Quality of Service (QOS) terms and/or SLAs (service level agreements).

    摘要翻译： 传统的网络数据包流量丢失/丢弃监视机制，例如用于伪线，IP流和隧道流量监控的网络数据包流量丢失/丢弃监视机制不会从特定伪线的两个端点处理或诊断聚合计数。 分组丢失和检测机制周期性地交换业务分组计数，以保持来自任一端点的伪线性健康的准确诊断。 此外，原始数据包计数被分析以识别错误路由和丢失的分组，因为两者都应该被考虑来评估网络健康和拥塞。 对于从特定边缘路由器发出的每个伪线，维持伪线统计，提供影响特定边缘路由器的伪线路的完整视图。 这些统计数据有助于问题检测，诊断和验证吞吐量标准，例如在服务质量（QOS）术语和/或SLA（服务级别协议）中表达的标准。

    System and methods for sending trace messages
    10.
    发明授权
    System and methods for sending trace messages 有权
    用于发送跟踪消息的系统和方法

    公开(公告)号：US07599303B2

    公开(公告)日：2009-10-06

    申请号：US11189357

    申请日：2005-07-26

    申请人： Thomas D. Nadeau ,  W. Mark Townsley

    发明人： Thomas D. Nadeau ,  W. Mark Townsley

    IPC分类号： G06F11/00 ,  H04L12/26 ,  H04J1/16

    CPC分类号： H04L45/10 ,  H04L12/4633 ,  H04L45/04 ,  H04L45/20 ,  H04L45/26 ,  H04L45/50

    摘要： A traceroute mechanism enables responses to the traceroute to reach the originating router (originator) along a multihop pseudowire (PW). A traceroute message includes an accumulator operable to count hops along a MH-PW, implemented as a time-to-live (TTL) field, as is known in the art. An originator router employs multiple TTL values, and decrements one of the TTL “accumulators” for each hop. At the ultimate (terminal) router defining the end of the multihop PW, a TTL in the return message is set to the number of hops traveled by the traceroute. The difference between the accumulator and the initial TTL value determines the number of hops traveled by the traceroute message, and hence the number of hops back to the originating node. The traceroute return message, now having a TTL set to the number of hops of the counterpart traceroute, reaches the originator when the TTL value is decremented to zero.

    摘要翻译： 一个跟踪路由机制使得响应traceroute可以沿着多跳伪线（PW）到达始发路由器（发起者）。 跟踪路由消息包括累加器，其可操作用于对实现为生存时间（TTL）字段的MH-PW的计数跳数进行计数，如本领域已知的。 发起方路由器采用多个TTL值，并为每一跳递减一个TTL“累加器”。 在定义多跳PW结束的终端（终端）路由器中，返回消息中的TTL被设置为由跟踪路由器行进的跳数。 累加器和初始TTL值之间的差异决定了由跟踪路由消息传播的跳数，从而确定了返回始发节点的跳数。 当TTL值递减到零时，现在将TTL设置为对端traceroute的跳数的traceroute返回消息到达发起者。