利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

186 条记录 (耗时 0.03 秒)

    Fast reroute (FRR) protection at the edge of a RFC 2547 network
    3.
    发明授权
    Fast reroute (FRR) protection at the edge of a RFC 2547 network 有权
    在RFC 2547网络边缘的快速重路由（FRR）保护

    公开(公告)号：US07983153B2

    公开(公告)日：2011-07-19

    申请号：US12481411

    申请日：2009-06-09

    申请人： Clarence Filsfils ,  Stefano B. Previdi ,  John Galen Scudder ,  David D. Ward ,  Jean-Philippe Vasseur ,  Jim Guichard

    发明人： Clarence Filsfils ,  Stefano B. Previdi ,  John Galen Scudder ,  David D. Ward ,  Jean-Philippe Vasseur ,  Jim Guichard

    IPC分类号： H04J1/16 ,  H04J3/14 ,  H04L1/00 ,  H04L12/26

    CPC分类号： H04L45/28 ,  H04L45/02 ,  H04L45/04 ,  H04L45/22 ,  H04L45/50

    摘要： In one embodiment, an edge device in a first routing domain is configured to communicate with a second routing domain via a data link. The edge device receives a data packet containing a destination address that is reachable via the second routing domain and an indication that the data packet is a protected packet that was previously rerouted from another edge device in the first routing domain via a Multi-Protocol Label Switching (MPLS) Fast Reroute (FRR) backup path. The edge device determines if communication with the second routing domain is still available via the data link, and if so, removes the indication that the data packet is a protected packet and forwards the data packet to the second routing domain, and, if not, drops the data packet to prevent the data packet from being rerouted a second time in the first routing domain on another MPLS FRR backup path.

    摘要翻译： 在一个实施例中，第一路由域中的边缘设备被配置为经由数据链路与第二路由域进行通信。 边缘设备接收包含经由第二路由域可到达的目的地地址的数据分组，以及指示数据分组是先前通过多协议标签交换在第一路由域中从另一边缘设备重新路由的受保护分组的指示 （MPLS）快速重路由（FRR）备份路径。 边缘设备确定与第二路由域的通信是否仍然通过数据链路可用，如果是，则删除数据分组是受保护分组的指示，并将数据分组转发到第二路由域，如果不是， 删除数据包，以防止数据包在另一个MPLS FRR备份路径上的第一个路由域再次被重新路由。

    Loop prevention technique for MPLS using service labels
    4.
    发明授权
    Loop prevention technique for MPLS using service labels 有权
    使用服务标签的MPLS环路防护技术

    公开(公告)号：US07961600B2

    公开(公告)日：2011-06-14

    申请号：US12694038

    申请日：2010-01-26

    申请人： Clarence Filsfils ,  David D. Ward ,  Stefano B. Previdi ,  Jean-Philippe Vasseur ,  Jim Guichard ,  Robert Raszuk

    发明人： Clarence Filsfils ,  David D. Ward ,  Stefano B. Previdi ,  Jean-Philippe Vasseur ,  Jim Guichard ,  Robert Raszuk

    IPC分类号： H04L12/26

    CPC分类号： H04L45/18 ,  H04L45/04 ,  H04L45/22 ,  H04L45/28 ,  H04L45/50

    摘要： In one embodiment, a loss of communication is detected between a first edge device of a computer network and a neighboring routing domain. A data packet is received at the first edge device, where the received data packet contains a destination address that is reachable via the neighboring routing domain. A determination is made whether a service label is located in a Multi-Protocol Label Switching (MPLS) label stack included in the received data packet. A service label in the MPLS label stack indicates that the received data packet was previously rerouted in accordance with fast reroute (FRR) operations. In response to a determination that the received data packet does not include a service label in the MPLS label stack, the received data packet is rerouted to a second edge device of the computer network for forwarding to the neighboring routing domain.

    摘要翻译： 在一个实施例中，在计算机网络的第一边缘设备和相邻路由域之间检测到通信丢失。 在第一边缘设备处接收数据分组，其中所接收的数据分组包含经由相邻路由域可到达的目的地地址。 确定服务标签是否位于包含在所接收的数据分组中的多协议标签交换（MPLS）标签栈中。 MPLS标签堆栈中的服务标签表示接收到的数据包是根据快速重路由（FRR）操作先前重新路由的。 响应于接收到的数据分组在MPLS标签堆栈中不包括服务标签的确定，所接收的数据分组被重新路由到计算机网络的第二边缘设备以转发到相邻路由域。

    Automatic protection of an SP infrastructure against exterior traffic
    6.
    发明授权
    Automatic protection of an SP infrastructure against exterior traffic 有权
    自动保护SP基础设施免受外部流量的影响

    公开(公告)号：US07639688B2

    公开(公告)日：2009-12-29

    申请号：US11183381

    申请日：2005-07-18

    申请人： Clarence Filsfils ,  Stefano B. Previdi ,  John Galen Scudder ,  David D. Ward

    发明人： Clarence Filsfils ,  Stefano B. Previdi ,  John Galen Scudder ,  David D. Ward

    IPC分类号： H04L12/56

    CPC分类号： H04L45/742 ,  H04L45/04 ,  H04L63/10

    摘要： A method and system for protecting valuable resources within an autonomous system network. Address prefixes within the system are designated as valuable and a flag bit is associated with the address within routing tables of routers of the network. Interfaces to border routers are identified and when packets are received at those interfaces, the packets are flagged with a flag or tag bit. The destination address of the received packet is compared to the flag bit associated with the valuable resource prefix, and if the packet is directed to that resource the packet is dropped and/or logged, but the packet is not forwarded to that resource. In specific cases an interface from an external source may be configured to not create the flag or tag bit, wherein that packet will be delivered to the destination prefix of the packet.

    摘要翻译： 一种用于保护自治系统网络内有价值资源的方法和系统。 系统中的地址前缀被指定为有价值的，并且标志位与网络的路由器的路由表中的地址相关联。 识别到边界路由器的接口，并且当在这些接口处接收到分组时，分组被标记为标志或标记位。 将接收到的分组的目的地地址与与有价值的资源前缀相关联的标志位进行比较，并且如果分组指向该资源，则分组被丢弃和/或记录，但是分组不被转发到该资源。 在特定情况下，来自外部源的接口可以被配置为不创建标志或标记位，其中该分组将被传递到分组的目的地前缀。

    Dynamic weighted-fair load-balancing
    7.
    发明申请
    Dynamic weighted-fair load-balancing 有权
    动态加权平衡负载均衡

    公开(公告)号：US20080123532A1

    公开(公告)日：2008-05-29

    申请号：US11604461

    申请日：2006-11-27

    申请人： David D. Ward ,  Clarence Filsfils ,  Stefano B. Previdi ,  Jean-Philippe Vasseur

    发明人： David D. Ward ,  Clarence Filsfils ,  Stefano B. Previdi ,  Jean-Philippe Vasseur

    IPC分类号： G01R31/08

    CPC分类号： H04L47/10 ,  H04L45/125 ,  H04L47/125

    摘要： In one embodiment, a node identifies a plurality of equal cost best paths to a destination, the best paths having one or more associated links. The node receives dynamic link utilization information for the associated links, and determines an amount of traffic to the destination to forward over each of the equal cost best paths, the amount being dynamically dependent upon the dynamic link utilization of the associated links for each equal cost best path.

    摘要翻译： 在一个实施例中，节点识别到目的地的多个相等成本最佳路径，最佳路径具有一个或多个相关联的链路。 节点接收相关联链路的动态链路利用信息，并且确定到目的地的业务量，以在每个相等成本最佳路径上转发，该数量动态地依赖于每个相等成本的相关链路的动态链路利用率 最佳路径

    System and method for dynamically responding to event-based traffic redirection
    8.
    发明授权
    System and method for dynamically responding to event-based traffic redirection 有权
    用于动态响应基于事件的流量重定向的系统和方法

    公开(公告)号：US08264962B2

    公开(公告)日：2012-09-11

    申请号：US11168694

    申请日：2005-06-27

    申请人： Jean-Philippe Vasseur ,  David D. Ward ,  Stefano B. Previdi ,  Clarence Filsfils

    发明人： Jean-Philippe Vasseur ,  David D. Ward ,  Stefano B. Previdi ,  Clarence Filsfils

    IPC分类号： G01R31/08

    CPC分类号： H04L45/22 ,  H04L45/02 ,  H04L45/28 ,  H04L47/70 ,  H04L47/746 ,  H04L47/762 ,  H04L47/825 ,  H04L47/829

    摘要： A technique dynamically resizes Traffic Engineering (TE) Label Switched Paths (LSPs) at a head-end node of the TE-LSPs in preparation to receive redirected traffic in response to an event in a computer network. The novel dynamic TE-LSP resizing technique is based on the detection of an event in the network that could cause traffic destined for one or more other (“remote”) head-end nodes of one or more TE-LSPs to be redirected to an event-detecting (“local”) head-end node of one or more TE-LSPs. An example of such a traffic redirection event is failure of a remote head-end node or failure of any of its TE-LSPs. Specifically, the local head-end node maintains TE-LSP steady state sampling and resizing frequencies to adapt the bandwidth of its TE-LSP(s) to gradual changes in the network over time. Upon detection of an event identifying possible traffic redirection, the local head-end node enters a Fast Resize (FR) state, in which the sampling and resizing frequencies are increased to quickly adapt the TE-LSP bandwidth(s) to any received redirected traffic.

    摘要翻译： 技术动态地调整TE-LSP的头端节点处的流量工程（TE）标签交换路径（LSP），准备响应于计算机网络中的事件接收重定向的流量。 新型动态TE-LSP调整大小技术是基于网络中可能导致一个或多个TE-LSP的一个或多个其他（“远程”）头端节点的流量被重定向到的事件的检测。 一个或多个TE-LSP的事件检测（“本地”）头端节点。 这种流量重定向事件的示例是远程头端节点的故障或其任何TE-LSP的故障。 具体来说，本地前端节点维护TE-LSP稳态采样和调整频率，以适应其TE-LSP的带宽随时间逐渐变化的网络。 在检测到识别可能的业务重定向的事件时，本地前端节点进入快速调整大小（FR）状态，其中增加采样和调整大小频率以快速地将TE-LSP带宽适配到任何接收到的重定向业务 。

    LOOP PREVENTION TECHNIQUE FOR MPLS USING SERVICE LABELS
    10.
    发明申请
    LOOP PREVENTION TECHNIQUE FOR MPLS USING SERVICE LABELS 有权
    使用服务标签的MPLS环路预防技术

    公开(公告)号：US20100118732A1

    公开(公告)日：2010-05-13

    申请号：US12694038

    申请日：2010-01-26

    申请人： Clarence Filsfils ,  David D. Ward ,  Stefano B. Previdi ,  Jean-Philippe Vasseur ,  Jim Guichard ,  Robert Raszuk

    发明人： Clarence Filsfils ,  David D. Ward ,  Stefano B. Previdi ,  Jean-Philippe Vasseur ,  Jim Guichard ,  Robert Raszuk

    IPC分类号： H04L12/26 ,  H04L12/56

    CPC分类号： H04L45/18 ,  H04L45/04 ,  H04L45/22 ,  H04L45/28 ,  H04L45/50

    摘要： In one embodiment, a loss of communication is detected between a first edge device of a computer network and a neighboring routing domain. A data packet is received at the first edge device, where the received data packet contains a destination address that is reachable via the neighboring routing domain. A determination is made whether a service label is located in a Multi-Protocol Label Switching (MPLS) label stack included in the received data packet. A service label in the MPLS label stack indicates that the received data packet was previously rerouted in accordance with fast reroute (FRR) operations. In response to a determination that the received data packet does not include a service label in the MPLS label stack, the received data packet is rerouted to a second edge device of the computer network for forwarding to the neighboring routing domain.

    摘要翻译： 在一个实施例中，在计算机网络的第一边缘设备和相邻路由域之间检测到通信丢失。 在第一边缘设备处接收数据分组，其中所接收的数据分组包含经由相邻路由域可到达的目的地地址。 确定服务标签是否位于包含在所接收的数据分组中的多协议标签交换（MPLS）标签栈中。 MPLS标签堆栈中的服务标签表示接收到的数据包是根据快速重路由（FRR）操作先前重新路由的。 响应于接收到的数据分组在MPLS标签堆栈中不包括服务标签的确定，所接收的数据分组被重新路由到计算机网络的第二边缘设备以转发到相邻路由域。