公开(公告)号：US10182003B2

公开(公告)日：2019-01-15

申请号：US15450858

申请日：2017-03-06

Applicant: Juniper Networks, Inc.

Inventor： Chandrasekar Ramachandran ,  Markus Jork ,  Yakov Rekhter ,  Harish Sitaraman

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

Abstract: 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.

公开(公告)号：US10069724B1

公开(公告)日：2018-09-04

申请号：US15151493

申请日：2016-05-11

Applicant: Juniper Networks, Inc.

Inventor： Raveendra Torvi ,  Ravi I Singh ,  Harish Sitaraman ,  Yakov Rekhter

IPC: G01R31/00 ,  H04L12/723 ,  H04L12/26 ,  H04L29/12

Abstract: 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.

公开(公告)号：US09843508B2

公开(公告)日：2017-12-12

申请号：US14682799

申请日：2015-04-09

Applicant: Juniper Networks, Inc.

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

IPC: H04L12/723 ,  H04L12/735

CPC classification number: H04L45/507 ,  H04L45/128 ,  H04L45/50

Abstract: 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.

公开(公告)号：US09660866B1

公开(公告)日：2017-05-23

申请号：US14587659

申请日：2014-12-31

Applicant: Juniper Networks, Inc.

Inventor： Ravi Singh ,  Raveendra Torvi ,  Yakov Rekhter

IPC: H04J1/16 ,  H04L12/24 ,  H04L12/803 ,  H04L12/723 ,  H04L12/26

CPC classification number: H04L41/0816 ,  H04L41/0869 ,  H04L43/0817 ,  H04L45/50 ,  H04L45/70

Abstract: Techniques are described for generating a No-Acknowledgement (NACK) message if the installation of a route for a label-switched path at a router has failed or is likely to fail. In some examples, a network device includes at least one processor and at least one module operable by the at least one processor to: receive a request to forward network packets for an LSP; responsive to receiving the request, initiate configuration of at least one forwarding unit of the network device to forward network packets for the LSP; generate a NACK message that indicates the at least one forwarding unit is not configured to forward the network packets for the LSP; and terminate based at least in part on the NACK message, the configuration of the at least one forwarding unit for the LSP.

公开(公告)号：US20160119392A1

公开(公告)日：2016-04-28

申请号：US14585745

申请日：2014-12-30

Applicant: Juniper Networks, Inc.

Inventor： Chandrasekar Ramachandran ,  Markus Jork ,  Yakov Rekhter ,  Harish Sitaraman

IPC: H04L29/06 ,  H04L12/723 ,  H04L12/751

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

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US20160119224A1

公开(公告)日：2016-04-28

申请号：US14585722

申请日：2014-12-30

Applicant: Juniper Networks, Inc.

Inventor： Chandrasekar Ramachandran ,  Markus Jork ,  Yakov Rekhter ,  Harish Sitaraman

IPC: H04L12/703 ,  H04L12/911 ,  H04L12/24 ,  H04L12/707 ,  H04L12/723

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

Abstract: 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.

Abstract translation: 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。