公开(公告)号：US10469369B2

公开(公告)日：2019-11-05

申请号：US15827060

申请日：2017-11-30

Applicant: Juniper Networks, Inc.

Inventor： Vishnu Pavan Beeram ,  Raveendra Torvi

IPC: H04L12/723 ,  H04L12/815 ,  H04L12/947 ,  H04L12/715 ,  H04L12/717

Abstract: A device may identify a portion of a label-switched path (LSP) on which a simple hierarchical LSP (sH-LSP) is to be used for transferring traffic via a network. The device may determine attribute information associated with the sH-LSP. The attribute information may include information associated with one or more characteristics of the sH-LSP. The device may provide an indication associated with identifying an available sH-LSP or creating a sH-LSP. The indication may include the attribute information associated with the sH-LSP, and may be being provided to cause the sH-LSP to be created on the portion of the LSP or an available sH-LSP, associated with the portion of the LSP, to be identified. The device may receive, based on providing the indication, an identifier associated with the sH-LSP. The device may cause the LSP to be set up based on the identifier associated with the sH-LSP.

公开(公告)号：US09838307B2

公开(公告)日：2017-12-05

申请号：US14981192

申请日：2015-12-28

Applicant: Juniper Networks, Inc.

Inventor： Vishnu Pavan Beeram ,  Raveendra Torvi

IPC: H04L12/26 ,  H04L12/723 ,  H04L12/815 ,  H04L12/947 ,  H04L12/717 ,  H04L12/715

CPC classification number: H04L45/50 ,  H04L45/42 ,  H04L45/46 ,  H04L47/22 ,  H04L49/25

Abstract: A device may identify a portion of a label-switched path (LSP) on which a simple hierarchical LSP (sH-LSP) is to be used for transferring traffic via a network. The device may determine attribute information associated with the sH-LSP. The attribute information may include information associated with one or more characteristics of the sH-LSP. The device may provide an indication associated with identifying an available sH-LSP or creating a sH-LSP. The indication may include the attribute information associated with the sH-LSP, and may be being provided to cause the sH-LSP to be created on the portion of the LSP or an available sH-LSP, associated with the portion of the LSP, to be identified. The device may receive, based on providing the indication, an identifier associated with the sH-LSP. The device may cause the LSP to be set up based on the identifier associated with the sH-LSP.

公开(公告)号：US09660860B1

公开(公告)日：2017-05-23

申请号：US14585303

申请日：2014-12-30

Applicant: Juniper Networks, Inc.

Inventor： Yakov Rekhter ,  Raveendra Torvi ,  Ravi Singh ,  Minjie Dai ,  John E. Drake ,  Vishnu Pavan Kumar Beeram ,  Yimin Shen ,  Harish Sitaraman ,  Chandrasekar Ramachandran

IPC: H04L12/26 ,  H04L12/24 ,  H04L12/723

CPC classification number: H04L45/50 ,  H04L41/0631 ,  H04L41/0659 ,  H04L45/28

Abstract: In general, techniques are described for a path computation delay timer for multi-protocol label switched networks. As an example, an ingress network device configured to act as an ingress for a label switched path (LSP) may perform the techniques. The ingress network device comprises an interface and a processor. The interface may receive a message indicating an error along the LSP. The processor may delay an operation performed to configure a replacement LSP to be used in place of the LSP in order to provide time during which a cause of the error along the LSP is able to be determined. When the cause of the error is determined to be a failure of a network device supporting operation of the LSP, the processor may further perform the operation to configure the replacement LSP with the ingress network device such that the replacement LSP avoids the failed network device.

公开(公告)号：US09590845B1

公开(公告)日：2017-03-07

申请号：US14586829

申请日：2014-12-30

Applicant: Juniper Networks, Inc.

Inventor： Santosh Esale ,  Raveendra Torvi ,  Yakov Rekhter

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

CPC classification number: H04L41/0668 ,  H04L41/24 ,  H04L45/20 ,  H04L45/22 ,  H04L45/28 ,  H04L45/50 ,  H04L45/507

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US08953500B1

公开(公告)日：2015-02-10

申请号：US13853966

申请日：2013-03-29

Applicant: Juniper Networks, Inc.

Inventor： Yimin Shen ,  Ina Minei ,  Raveendra Torvi

IPC: H04L12/28 ,  H04L12/761 ,  H04L1/00

CPC classification number: H04L45/16 ,  H04L45/46

Abstract: Techniques are described for establishing a point-to-multipoint (P2MP) label switched path (LSP) using a branch node-initiated signaling model in which branch node to leaf (B2L) sub-LSPs are signaled and utilized to form a P2MP LSP. The techniques described herein provides a scalable solution in which the number of sub-LSPs for which the source node or any given branch node need maintain state is equal to the number of physical data flows output from that node to downstream nodes, i.e., the number of output interfaces used for the P2MP LSP by that node to output data flows to downstream nodes. As such, unlike the conventional source node-initiated model in which each node maintains state for sub-LSPs that service each of the leaf nodes downstream from the device, the size and scalability of a P2MP LSP is no longer bound to the number of leaves that are downstream from that node.

Abstract translation: 描述了使用分支节点发起的信令模型来建立点对多点（P2MP）标签交换路径（LSP）的技术，其中分支节点到叶（B2L）子LSP被用信号通知并用于形成P2MP LSP。 本文描述的技术提供了可扩展解决方案，其中源节点或任何给定分支节点需要维护状态的子LSP的数量等于从该节点输出到下游节点的物理数据流的数量，即数量 由该节点用于P2MP LSP的输出接口输出到下游节点的数据流。 因此，与传统的源节点发起的模式不同，其中每个节点维护为设备下游的每个叶节点提供服务的子LSP的状态，P2MP LSP的大小和可扩展性不再限于叶数 这是该节点的下游。

公开(公告)号：US12244493B2

公开(公告)日：2025-03-04

申请号：US18531947

申请日：2023-12-07

Applicant: Juniper Networks, Inc.

Inventor： Tarek Saad ,  Manish Talwar ,  Raveendra Torvi ,  Ajay Kachrani ,  Kireeti Kompella

IPC: H04L45/50 ,  H04L9/40 ,  H04L45/00 ,  H04L69/22

Abstract: In some implementations, an egress network device of a multiprotocol label switching (MPLS) network may exchange Internet key exchange (IKE) messages with an ingress network device of the MPLS network to establish a security association between the egress network device and the ingress network device. The egress network device may receive an MPLS packet that includes an MPLS header, a secure MPLS data header, and an MPLS payload. The egress network device may process the MPLS header to determine a label associated with a label-switched path (LSP) and a secure function indicator. The egress network device may decrypt, using a secure function identified based on the secure MPLS data header, the MPLS payload to generate a decrypted packet. The egress network device may transmit the decrypted packet towards a destination device.

公开(公告)号：US11784937B2

公开(公告)日：2023-10-10

申请号：US17656846

申请日：2022-03-28

Applicant: Juniper Networks, Inc.

Inventor： Venkata Naga Chaitanya Munukutla ,  Raveendra Torvi ,  Dmitry A. Shokarev ,  Vishnu Pavan Kumar Beeram ,  Manikandan Musuvathi Poornachary ,  Shivam Vaid

IPC: H04L47/32 ,  H04L43/026 ,  H04L43/16 ,  H04L45/00 ,  H04L49/253

CPC classification number: H04L47/32 ,  H04L43/026 ,  H04L43/16 ,  H04L45/38 ,  H04L49/254

Abstract: In general, this disclosure describes a network device to determine a cause of packets being dropped within a network. An example method includes generating, by a traffic monitor operating on a network device, an exception packet that includes a unique exception code that identifies a cause for a component in the network device to discard a transit packet, and a nexthop index identifying a forwarding path being taken by the transit packet experiencing the exception. The method also includes forwarding the exception packet to a collector to be processed.

公开(公告)号：US20230142996A1

公开(公告)日：2023-05-11

申请号：US18148769

申请日：2022-12-30

Applicant: Juniper Networks, Inc.

Inventor： Tarek Saad ,  Raveendra Torvi ,  Vishnu Pavan Kumar Beeram

IPC: H04L41/0806 ,  H04L41/0668 ,  H04L45/745 ,  H04L47/125 ,  H04L47/724 ,  H04L61/2592 ,  H04L47/10 ,  H04L61/5007

CPC classification number: H04L41/0806 ,  H04L41/0668 ,  H04L45/745 ,  H04L47/125 ,  H04L47/724 ,  H04L61/2592 ,  H04L47/10 ,  H04L61/5007 ,  H04L45/50

Abstract: In general, techniques are described for signaling IP path tunnels for traffic engineering using constraints in an IP network. For example, network devices, e.g., routers, of an IP network may compute an IP path using constraint information and establish the IP path using, for example, Resource Reservation Protocol, to signal the IP path without using MPLS. As one example, the egress router generates a path reservation signaling message that includes an egress IP address that is assigned for use by the routers on the IP path to send traffic of the data flow by encapsulating the traffic with the egress IP address and forwarding toward the egress router. As each router in the IP path receives the path reservation signaling message, the router configures a forwarding state to forward traffic encapsulated with the egress IP address to a next hop along the IP path toward the egress router.

公开(公告)号：US11252082B1

公开(公告)日：2022-02-15

申请号：US17097549

申请日：2020-11-13

Applicant: Juniper Networks, Inc.

Inventor： Tarek Saad ,  Raveendra Torvi ,  Vishnu Pavan Beeram ,  Jonathan C. Barth

IPC: H04L12/707 ,  H04L12/721 ,  H04L12/26 ,  H04L12/715 ,  H04L12/751

Abstract: An example network element includes one or more interfaces and a control unit, the control unit includes one or more processors configured to determine an egress network domain identifier (ID) and determine an abstracted interdomain network topology. The one or more processors are also configured to determine one or more interdomain paths from an abstracted ingress domain node to an abstracted egress domain node and determine whether an abstracted domain node is on the one or more interdomain paths. The one or more processors are configured to, based on the abstracted domain node being on the one or more interdomain paths, include one or more resources within a network domain in a filtered traffic engineering database (TED) and compute a path from an ingress node within the ingress network domain to an egress node within the egress network domain based on the filtered TED.

公开(公告)号：US20210392014A1

公开(公告)日：2021-12-16

申请号：US17458039

申请日：2021-08-26

Applicant: Juniper Networks, Inc.

Inventor： Raveendra Torvi ,  Abhishek Deshmukh ,  Kireeti Kompella ,  Tarek Saad ,  Vishnu Pavan Beeram ,  Ronald Bonica

IPC: H04L12/437 ,  H04L12/24 ,  H04L12/723

Abstract: A ring node N belonging to a resilient MPLS ring (RMR) provisions and/or configures clockwise (CW) and anti-clockwise (AC) paths on the RMR by: (a) configuring two ring node segment identifiers (Ring-SIDs) on the ring node, wherein a first of the two Ring-SIDs (CW-Ring-SID) is to reach N in a clockwise direction on the ring and a second of the two Ring-SIDs (AC-Ring-SID) is to reach N in an anti-clockwise direction on the ring, and wherein the CW-Ring-SID and AC-Ring-SID are unique within a source packet routing in networking (SPRING) domain including the ring; (b) generating a message including the ring node's CW-Ring-SID and AC-Ring-SID; and (c) advertising the message, via an interior gateway protocol, for receipt by other ring nodes belonging to the ring such that (1) a clockwise multipoint-to-point path (CWP) is defined such that every other one of the ring nodes belonging to the ring can be an ingress for the CWP and such that only the node is an egress for the CWP, and (2) an anti-clockwise multipoint-to-point path (ACP) is defined such that every other one of the ring nodes belonging to the ring can be an ingress for the ACP and such that only the node is an egress for the ACP.