公开(公告)号：US20180083870A1

公开(公告)日：2018-03-22

申请号：US15827060

申请日：2017-11-30

Applicant: Juniper Networks, Inc.

Inventor： Vishnu Pavan BEERAM ,  Raveendra Torvi

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

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：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：US09832121B1

公开(公告)日：2017-11-28

申请号：US14587563

申请日：2014-12-31

Applicant: Juniper Networks, Inc.

Inventor： Ravi Singh ,  Raveendra Torvi ,  Ronald P. Folkes ,  Alia K. Atlas ,  Navaneetha Krishnan V

IPC: G06F15/173 ,  H04L12/741 ,  H04L12/803

CPC classification number: H04L45/745 ,  H04L45/507 ,  H04L45/64 ,  H04L47/122

Abstract: In some examples, a network device of a network comprises a first component configured to store a plurality of next hop instructions corresponding to respective logical or physical network structures of the network. The network device also comprises a second component configured to send, to the first component, a message that identifies an association of the plurality of next hop instructions, wherein the first component is further configured to modify, in response to receiving the message, each of the plurality of next hop instructions.

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：US11811595B2

公开(公告)日：2023-11-07

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 ,  H04L45/50

CPC classification number: H04L41/0806 ,  H04L41/0668 ,  H04L45/745 ,  H04L47/10 ,  H04L47/125 ,  H04L47/724 ,  H04L61/2592 ,  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：US11451478B1

公开(公告)日：2022-09-20

申请号：US16692842

申请日：2019-11-22

Applicant: Juniper Networks, Inc.

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

IPC: H04L47/125 ,  H04L45/18 ,  H04L45/00

Abstract: A tactical solution to network congestion is provided by a data forwarding device having (1) a first interface with a first link to a downstream data forwarding device and (2) second interface with a second link to a downstream data forwarding device, and executing a method comprising: (a) configuring the second interface as part of a loop-free alternate (LFA) path to a destination device, wherein the first interface is part of a shortest/preferred path to the destination device; (b) monitoring congestion at the first interface to determine whether or not the congestion exceeds a first threshold; and (c) responsive to a determination that the congestion exceeds the first threshold, forwarding at least some data addressed to the destination device, over the LFA path via the second interface instead of over the shortest/preferred path via the first interface, thereby alleviating congestion at the first interface, and otherwise, responsive to a determination that the congestion does not exceed the first threshold, not forwarding at least some data addressed to the destination device, over the LFA path via the second interface instead of over the shortest/preferred path via the first interface.

公开(公告)号：US20220158931A1

公开(公告)日：2022-05-19

申请号：US17645225

申请日：2021-12-20

Applicant: Juniper Networks, Inc.

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

IPC: H04L45/24 ,  H04L45/00 ,  H04L45/12 ,  H04L43/0882 ,  H04L45/02

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：US20220086082A1

公开(公告)日：2022-03-17

申请号：US17150082

申请日：2021-01-15

Applicant: Juniper Networks, Inc.

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

IPC: H04L12/725 ,  H04L12/723 ,  H04L12/721 ,  H04L12/775

Abstract: A disclosed method may include (1) receiving, at a network node within a network, a packet from another network node within the network, (2) identifying, within the packet, a slice label that indicates a network slice that has been logically partitioned on the network, (3) determining a QoS policy that corresponds to the network slice indicated by the slice label, (4) applying the QoS policy to the packet, and then upon applying the QoS policy to the packet, (5) forwarding the packet to an additional network node within the network. Various other apparatuses, systems, and methods are also disclosed.

公开(公告)号：US11252100B2

公开(公告)日：2022-02-15

申请号：US16577864

申请日：2019-09-20

Applicant: Juniper Networks, Inc.

Inventor： Harish Sitaraman ,  Raveendra Torvi ,  Vishnu Pavan Beeram ,  Chandrasekar Ramachandran

IPC: H04L12/707 ,  H04L12/733 ,  H04L12/911 ,  H04L12/703 ,  H04L12/723 ,  H04L12/913

Abstract: The disclosed computer-implemented method may include (1) receiving, at a network node within a network, a packet from another network node within the network, (2) identifying, within the packet, a label stack that includes a plurality of labels that collectively represent at least a portion of a label-switched path within the network, (3) popping, from the label stack, a label that corresponds to a next hop of the network node, (4) determining, based at least in part on the label, that the next hop has experienced a failure that prevents the packet from reaching a destination via the next hop, (5) identifying a backup path that merges with the label-switched path at a next-to-next hop included in the label-switched path, and then (6) forwarding the packet to the next-to-next hop via the backup path. Various other methods, systems, and apparatuses are also disclosed.

公开(公告)号：US11240142B2

公开(公告)日：2022-02-01

申请号：US16587547

申请日：2019-09-30

Applicant: Juniper Networks, Inc.

Inventor： Tarek Saad ,  Raveendra Torvi ,  Vishnu Pavan Beeram

IPC: H04L12/721

Abstract: Techniques are described for class-based traffic engineering in an IP network. For example, routers of an IP network may establish one or more constrained traffic engineered paths using a link-state protocol (e.g., IGP) without using signaling protocols, such as RSVP or SPRING, or encapsulating packets over MPLS. For example, an egress router of the IP network may receive a capability message specifying the capability of routers to compute a constrained path to the egress router, wherein the capability message comprises path computation information including an identifier of a path computation algorithm to be used by the one or more of the plurality of network devices to reach the egress network device. The egress router may advertise a reachability message including a destination IP prefix and the identifier of the path computation algorithm to cause routers in the IP network to compute the constrained path to reach the egress router.