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：US20200021535A1

公开(公告)日：2020-01-16

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

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：US10469371B2

公开(公告)日：2019-11-05

申请号：US15863611

申请日：2018-01-05

Applicant: Juniper Networks, Inc.

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

IPC: H04L12/00 ,  H04L12/723 ,  H04L12/733

Abstract: The disclosed system may include (1) receiving, at an ingress node within a network, a request to forward a packet along a label-switched path to an egress node within the network, (2) identifying a limit on the number of labels that the ingress node is capable of forwarding within a label stack of the packet, (3) determining that the number of hops within the label-switched path exceeds the limit on the number of labels that the ingress node is capable of forwarding, (4) selecting at least one of the hops within the label-switched path to act as a delegation node that imposes, onto the label stack of the packet, at least one label corresponding to a downstream hop within the label-switched path and (5) forwarding the packet from the ingress node to the delegation node to enable the delegation node to impose the label onto the label stack.

公开(公告)号：US20180367450A1

公开(公告)日：2018-12-20

申请号：US15863611

申请日：2018-01-05

Applicant: Juniper Networks, Inc.

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

IPC: H04L12/723 ,  H04L12/733

CPC classification number: H04L45/50 ,  H04L45/20

Abstract: The disclosed system may include (1) receiving, at an ingress node within a network, a request to forward a packet along a label-switched path to an egress node within the network, (2) identifying a limit on the number of labels that the ingress node is capable of forwarding within a label stack of the packet, (3) determining that the number of hops within the label-switched path exceeds the limit on the number of labels that the ingress node is capable of forwarding, (4) selecting at least one of the hops within the label-switched path to act as a delegation node that imposes, onto the label stack of the packet, at least one label corresponding to a downstream hop within the label-switched path and (5) forwarding the packet from the ingress node to the delegation node to enable the delegation node to impose the label onto the label stack.

公开(公告)号：US20180262440A1

公开(公告)日：2018-09-13

申请号：US15688813

申请日：2017-08-28

Applicant: Juniper Networks, Inc.

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

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

CPC classification number: H04L47/728 ,  H04L45/22 ,  H04L45/28 ,  H04L45/50 ,  H04L47/724 ,  H04L47/825

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：US20180262425A1

公开(公告)日：2018-09-13

申请号：US15493103

申请日：2017-04-20

Applicant: Juniper Networks, Inc.

Inventor： Harish Sitaraman ,  Raveendra Torvi ,  Markus Jork ,  Kireeti Kompella ,  Vishnu Pavan Beeram ,  Chandrasekar Ramachandran

IPC: H04L12/723 ,  H04L12/911

CPC classification number: H04L45/50 ,  H04L45/52

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 an LSP within the network, (3) popping, from the label stack, a label that corresponds to a specific link to a further network node, and then upon popping the label from the label stack, (4) forwarding the packet to the further network node by way of the specific link. Various other methods, systems, and apparatuses are also disclosed.

公开(公告)号：US20170195216A1

公开(公告)日：2017-07-06

申请号：US15450858

申请日：2017-03-06

Applicant: Juniper Networks, Inc.

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

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

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.

公开(公告)号：US20250150383A1

公开(公告)日：2025-05-08

申请号：US18401459

申请日：2023-12-30

Applicant: Juniper Networks, Inc.

Inventor： Balaji Rajagopalan ,  Chandrasekar Ramachandran ,  Vali Mohammed Sunesara

IPC: H04L45/00 ,  H04L45/28 ,  H04L45/50

Abstract: U-Turn detour paths, though the head-end router of a primary label switched path (LSP), are configured and used to enable fast failover to a secondary LSP, while avoiding reserving bandwidth (e.g., on links unused by primary and secondary paths) unnecessarily.

公开(公告)号：US12212490B2

公开(公告)日：2025-01-28

申请号：US18477340

申请日：2023-09-28

Applicant: Juniper Networks, Inc.

Inventor： Vishnu Pavan Beeram ,  Chandrasekar Ramachandran

IPC: H04L45/50 ,  H04L45/00 ,  H04L45/02

Abstract: In some implementations, a head Level 2 (L2) node of an intermediate system-intermediate system (IS-IS) flood reflection (FR) network may determine an end-to-end path from the head L2 node to a tail L2 node of the IS-IS FR network. The IS-IS FR network includes a plurality of L2 nodes and a plurality of FR clusters that each comprise a plurality of Level 1 (L1) nodes and a plurality of L1 and L2 (L1/L2) nodes connected by a plurality of L1 links. The head L2 node may send information associated with the end-to-end path to another node identified in the end-to-end path to cause a label switched path (LSP) to be established from the head L2 node to the tail L2 node, wherein the LSP traverses one or more L1 links within an FR cluster of the IS-IS FR network.

公开(公告)号：US11949560B1

公开(公告)日：2024-04-02

申请号：US18149338

申请日：2023-01-03

Applicant: Juniper Networks, Inc.

Inventor： Jonathan C. Barth ,  Vishnu Pavan Beeram ,  Srihari Ramachandra Sangli ,  Chandrasekar Ramachandran

IPC: H04L41/0893 ,  H04L12/46 ,  H04L41/40 ,  H04L45/02 ,  H04L45/64

CPC classification number: H04L41/0893 ,  H04L12/4641 ,  H04L41/40 ,  H04L45/04 ,  H04L45/64

Abstract: A network device may receive a border gateway protocol (BGP) flow specification route associated with creation of an overlay network slice in a network, and may create a new routing instance based on the BGP flow specification route. The network device may associate interfaces defined by the BGP flow specification route with virtual private network (VPN) members, and may determine VPN parameters based on the BGP flow specification route. The network device may advertise the VPN parameters within the network to cause the network to generate the overlay network slice.