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    Intra-area LDP node protection
    2.
    发明授权
    Intra-area LDP node protection 有权
    区域内LDP节点保护

    公开(公告)号：US09590844B1

    公开(公告)日：2017-03-07

    申请号：US14586809

    申请日：2014-12-30

    申请人： Juniper Networks, Inc.

    发明人： Santosh Esale ,  Raveendra Torvi ,  Yakov Rekhter

    IPC分类号： H04L12/28 ,  H04L12/24 ,  H04L12/751 ,  H04L12/723 ,  H04L12/733

    CPC分类号： H04L41/0668 ,  H04L45/20 ,  H04L45/22 ,  H04L45/28 ,  H04L45/50 ,  H04L45/507

    摘要： Techniques are described for providing fast reroute intra-area node protection for label switched paths (LSPs) using label distribution protocol (LDP). In one example, a network device may be configured to use network topology information, obtained by an Interior Gateway Protocol (IGP) executing on the network device, to identify a next next hop merge point to which to automatically establish a bypass LSP, and to which to establish a targeted LDP session for obtaining a label advertised by the next next hop merge point.

    摘要翻译： 描述了使用标签分发协议（LDP）为标签交换路径（LSP）提供快速重路由区域内节点保护的技术。 在一个示例中，网络设备可以被配置为使用由网络设备上执行的内部网关协议（IGP）获得的网络拓扑信息来识别自动建立旁路LSP的下一个下一跳合并点，并且 其建立目标LDP会话，以获得由下一个下一跳合并点通告的标签。

    Refresh interval independent fast reroute facility protection tear down messaging
    3.
    发明授权
    Refresh interval independent fast reroute facility protection tear down messaging 有权
    刷新间隔独立快速重路由设备保护拆除消息

    公开(公告)号：US09590895B2

    公开(公告)日：2017-03-07

    申请号：US14585683

    申请日：2014-12-30

    申请人： Juniper Networks, Inc.

    发明人： Chandrasekar Ramachandran ,  Markus Jork ,  Yakov Rekhter ,  Harish Sitaraman

    IPC分类号： H04L12/24 ,  H04L12/703 ,  H04L12/723 ,  H04L12/751 ,  H04L12/913 ,  H04L12/911 ,  H04L12/707 ,  H04L29/06

    CPC分类号： H04L45/28 ,  H04L41/0654 ,  H04L41/0668 ,  H04L45/026 ,  H04L45/22 ,  H04L45/50 ,  H04L45/507 ,  H04L47/72 ,  H04L47/728 ,  H04L65/4069

    摘要： In one example, techniques of this disclosure may enable a point of local repair (PLR) network device to signal availability of link protection or node protection to a merge point (MP) network device and enable a network device to actively determine whether or not it is a merge point router. Based on whether or not the network device determines it is a MP, the network device may selectively clean up LSP states when there is an upstream link or node failure. The RSVP-TE protocol may be extended to enable a network device to send a tear down message to a downstream router, which may enable the downstream router to conditionally delete locale LSP state information. In some instances, a PLR network device may directly send a tear down message to a MP network device even though the PLR network device may not have a working bypass LSP.

    摘要翻译： 在一个示例中，本公开的技术可以使得本地修复（PLR）网络设备的点能够向合并点（MP）网络设备通知链路保护或节点保护的可用性，并使得网络设备能够主动地确定其是否 是一个合并点路由器。 基于网络设备是否确定它是MP，当存在上游链路或节点故障时，网络设备可以选择性地清除LSP状态。 可以扩展RSVP-TE协议以使网络设备向下游路由器发送撕下消息，这可以使下游路由器有条件地删除区域性LSP状态信息。 在一些情况下，即使PLR网络设备可能没有工作旁路LSP，PLR网络设备也可以直接向MP网络设备发送拆卸消息。

    RSVP MAKE-BEFORE-BREAK LABEL REUSE
    4.
    发明申请
    RSVP MAKE-BEFORE-BREAK LABEL REUSE 有权
    RSVP MAKE-BEFORE-BREAK标签重用

    公开(公告)号：US20160261494A1

    公开(公告)日：2016-09-08

    申请号：US14682799

    申请日：2015-04-09

    申请人： Juniper Networks, Inc.

    发明人： Minjie Dai ,  Yimin Shen ,  Raveendra Torvi ,  Markus Jork ,  Yakov Rekhter ,  Natrajan Venkataraman

    IPC分类号： H04L12/723

    CPC分类号： H04L45/507 ,  H04L45/128 ,  H04L45/50

    摘要： Techniques are described for reusing downstream-assigned labels when establishing a new instance of a label switched path (LSP) prior to tearing down an existing instance of the LSP using make-before-break (MBB) procedures for RSVP. The techniques enable a routing engine of any non-ingress router along a path of the new LSP instance to reuse a previously allocated label for the existing LSP instance as the downstream assigned label for the new LSP instance when the paths of the existing LSP instance and the new LSP instance overlap. In this way, the non-ingress router does not need to update a label route in its forwarding plane for the reused label. When the new LSP instance completely overlaps the existing LSP instance, an ingress router of the LSP may avoid updating an ingress route in its forwarding plane for applications that use the LSP.

    摘要翻译： 描述了在使用RSVP的使用前置中断（MBB）过程拆除LSP的现有实例之前，在建立标签交换路径（LSP）的新实例时，重用技术来重用下行分配的标签。 这些技术使得沿着新LSP实例的路径的任何非入口路由器的路由引擎可以使用现有LSP实例的先前分配的标签作为新LSP实例的下行分配标签，当现有LSP实例的路径和 新的LSP实例重叠。 以这种方式，非入口路由器不需要在其转发平面中更新重用标签的标签路由。 当新LSP实例与现有LSP实例完全重叠时，LSP的入口路由器可以避免在其转发平面中更新使用LSP的应用的入口路由。

    System and method for verifying the functionality of network paths
    5.
    发明授权
    System and method for verifying the functionality of network paths 有权
    用于验证网络路径功能的系统和方法

    公开(公告)号：US09379959B1

    公开(公告)日：2016-06-28

    申请号：US14328669

    申请日：2014-07-10

    申请人： Juniper Networks, Inc.

    发明人： Raveendra Torvi ,  Ravi I Singh ,  Harish Sitaraman ,  Yakov Rekhter

    IPC分类号： G06F15/177 ,  G06F15/173 ,  H04L12/26 ,  H04L12/723 ,  H04L12/701

    CPC分类号： H04L45/50 ,  H04L43/0811 ,  H04L43/12 ,  H04L43/50 ,  H04L45/00 ,  H04L61/2007

    摘要： The disclosed computer-implemented method for verifying the functionality of network paths may include (1) constructing, at a source node within a network, a test packet that uniquely identifies a network path whose functionality is unverified, (2) sending the test packet to a target node within the network via the network path in an attempt to verify the functionality of the network path, (3) receiving, back from the target node, the test packet sent to the target node via the network path, and then (4) verifying, at the source node, the functionality of the network path based at least in part on the test packet received back from the target node. Various other methods, systems, and computer-readable media are also disclosed.

    摘要翻译： 所公开的用于验证网络路径的功能的计算机实现的方法可以包括（1）在网络中的源节点处构建唯一地标识其功能未被验证的网络路径的测试分组，（2）将测试分组发送到 网络中的目标节点，以试图验证网络路径的功能，（3）从目标节点接收经由网络路径发送到目标节点的测试分组，然后（4 至少部分地基于从目标节点接收的测试分组在源节点验证网络路径的功能。 还公开了各种其它方法，系统和计算机可读介质。

    Inter-area LDP node protection
    8.
    发明授权
    Inter-area LDP node protection 有权
    区域内LDP节点保护

    公开(公告)号：US09590845B1

    公开(公告)日：2017-03-07

    申请号：US14586829

    申请日：2014-12-30

    申请人： Juniper Networks, Inc.

    发明人： Santosh Esale ,  Raveendra Torvi ,  Yakov Rekhter

    IPC分类号： G01R31/08 ,  H04L12/24 ,  H04L12/723

    CPC分类号： H04L41/0668 ,  H04L41/24 ,  H04L45/20 ,  H04L45/22 ,  H04L45/28 ,  H04L45/50 ,  H04L45/507

    摘要： Techniques are described for providing fast reroute inter-area node protection for label switched paths (LSPs) using label distribution protocol (LDP). In one example, a network device may be configured to determine that a protected node is an area border router, and use network topology information, obtained by an Interior Gateway Protocol (IGP) executing on the network device, to identify a second area border router in the same IGP area as the protected node, to which to automatically establish a bypass LSP and a targeted LDP session.

    摘要翻译： 描述了使用标签分发协议（LDP）为标签交换路径（LSP）提供快速重路由区域间节点保护的技术。 在一个示例中，网络设备可以被配置为确定受保护节点是区域边界路由器，并且使用通过在网络设备上执行的内部网关协议（IGP）获得的网络拓扑信息来识别第二区域边界路由器 与受保护节点相同的IGP区域，自动建立旁路LSP和目标LDP会话。

    RSVP make-before-break label reuse
    9.
    发明授权
    RSVP make-before-break label reuse 有权

    公开(公告)号：US10313234B2

    公开(公告)日：2019-06-04

    申请号：US15834722

    申请日：2017-12-07

    申请人： Juniper Networks, Inc.

    发明人： Minjie Dai ,  Yimin Shen ,  Raveendra Torvi ,  Markus Jork ,  Yakov Rekhter ,  Natrajan Venkataraman

    IPC分类号： H04L12/723 ,  H04L12/735

    摘要： Techniques are described for reusing downstream-assigned labels when establishing a new instance of a label switched path (LSP) prior to tearing down an existing instance of the LSP using make-before-break (MBB) procedures for RSVP. The techniques enable a routing engine of any non-ingress router along a path of the new LSP instance to reuse a previously allocated label for the existing LSP instance as the downstream assigned label for the new LSP instance when the paths of the existing LSP instance and the new LSP instance overlap. In this way, the non-ingress router does not need to update a label route in its forwarding plane for the reused label. When the new LSP instance completely overlaps the existing LSP instance, an ingress router of the LSP may avoid updating an ingress route in its forwarding plane for applications that use the LSP.

    RSVP MAKE-BEFORE-BREAK LABEL REUSE
    10.
    发明申请
    RSVP MAKE-BEFORE-BREAK LABEL REUSE 审中-公开

    公开(公告)号：US20180097726A1

    公开(公告)日：2018-04-05

    申请号：US15834722

    申请日：2017-12-07

    申请人： Juniper Networks, Inc.

    发明人： Minjie Dai ,  Yimin Shen ,  Raveendra Torvi ,  Markus Jork ,  Yakov Rekhter ,  Natrajan Venkataraman

    IPC分类号： H04L12/723 ,  H04L12/735

    CPC分类号： H04L45/507 ,  H04L45/128 ,  H04L45/50

    摘要： Techniques are described for reusing downstream-assigned labels when establishing a new instance of a label switched path (LSP) prior to tearing down an existing instance of the LSP using make-before-break (MBB) procedures for RSVP. The techniques enable a routing engine of any non-ingress router along a path of the new LSP instance to reuse a previously allocated label for the existing LSP instance as the downstream assigned label for the new LSP instance when the paths of the existing LSP instance and the new LSP instance overlap. In this way, the non-ingress router does not need to update a label route in its forwarding plane for the reused label. When the new LSP instance completely overlaps the existing LSP instance, an ingress router of the LSP may avoid updating an ingress route in its forwarding plane for applications that use the LSP.