公开(公告)号：US20220182314A1

公开(公告)日：2022-06-09

申请号：US17589539

申请日：2022-01-31

Applicant: Juniper Networks, Inc.

Inventor： Abhishek Deshmukh ,  Raveendra Torvi ,  Tarek Saad ,  Vishnu Pavan Beeram

IPC: H04L45/00 ,  H04L49/00

Abstract: The same prefix segment identifier (SID) may be configured and/or used for either (A) more than one prefix within an interior gateway protocol (IGP) domain, or (B) one prefix with more than one path computation algorithm within the IGP domain by: (a) receiving, by a node in the IGP domain, an IGP advertisement including both (1) a prefix SID and a segment routing global block (SRGB) slice identifier; (b) determining whether or not the SRGB slice identified by the SRGB slice identifier is provisioned on the node; and (c) responsive to a determination that the SRGB slice identified by the SRGB slice identifier is not provisioned on the node, not processing the prefix SID included in the received IGP advertisement, and otherwise responsive to a determination that the SRGB slice identified by the SRGB slice identifier is provisioned on the node, (1) processing the prefix SID and SRGB slice to generate a unique, per SRGB slice, MPLS label for the prefix, and (2) updating a label forwarding information base (LFIB) for the node using the unique, per SRGB slice, label for the prefix and the prefix.

公开(公告)号：US11323381B2

公开(公告)日：2022-05-03

申请号：US16917433

申请日：2020-06-30

Applicant: Juniper Networks, Inc.

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

IPC: H04L12/823 ,  H04L12/26 ,  H04L12/721 ,  H04L47/32 ,  H04L43/026 ,  H04L49/253 ,  H04L45/00 ,  H04L43/16

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：US20210328939A1

公开(公告)日：2021-10-21

申请号：US16917433

申请日：2020-06-30

Applicant: Juniper Networks, Inc.

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

IPC: H04L12/823 ,  H04L12/26 ,  H04L12/721 ,  H04L12/937

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：US20190386914A1

公开(公告)日：2019-12-19

申请号：US16007847

申请日：2018-06-13

Applicant: Juniper Networks, Inc.

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

IPC: H04L12/723

Abstract: In general, techniques described are for providing graceful restart procedures for network devices of label switched paths (LSPs) implemented with label stacks. For example, a restarting network device may include a processor coupled to a memory that executes software configured to: receive a path signaling message including a recovery object that defines a reverse path of the LSP from an egress network device of the LSP to the restarting network device, including at least an upstream label and a downstream label associated with the restarting network device; determine, based on the recovery object, the upstream label and the downstream label associated with the restarting network device; and instantiate a control plane state of the restarting network device based on the recovery object.

公开(公告)号：US10361949B2

公开(公告)日：2019-07-23

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: H04L1/00 ,  H04L12/741 ,  H04L12/723 ,  H04L12/701 ,  H04L12/781

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：US20180006948A1

公开(公告)日：2018-01-04

申请号：US15199159

申请日：2016-06-30

Applicant: Juniper Networks, Inc.

Inventor： Raveendra Torvi ,  Harish Sitaraman ,  Vishnu Pavan Beeram ,  Shraddha Hegde ,  Chandrasekar Ramachandran ,  Sudharsana Venkataraman

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

CPC classification number: H04L47/125 ,  H04L41/0896 ,  H04L43/0882 ,  H04L43/0894 ,  H04L43/16 ,  H04L45/50 ,  H04L47/11 ,  H04L47/822

Abstract: In general, techniques described are for bandwidth sharing between resource reservation protocol label switched paths (LSPs) and non-resource reservation protocol LSPs. For example, in networks where resource reservation protocol LSPs and non-resource reservation protocol LSPs co-exist within the same domain, resource reservation protocol LSPs and non-resource reservation protocol LSPs may share link bandwidth. However, when non-resource reservation protocol LSPs are provisioned, resource reservation protocol path computation elements computing resource reservation protocol paths may not account for non-resource reservation protocol LSP bandwidth utilization. The techniques described herein provide a mechanism for automatically updating traffic engineering database (TED) information about resource reservation protocol LSPs in a way that accounts for non-resource reservation protocol LSP traffic flow statistics, such as bandwidth utilization. Path computation elements may thus rely on an accurate TED for LSP path computation.

公开(公告)号：US11909556B2

公开(公告)日：2024-02-20

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: H04L12/24 ,  H04L12/437 ,  H04L41/12 ,  H04L45/50

CPC classification number: H04L12/437 ,  H04L41/12 ,  H04L45/50

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.

公开(公告)号：US11805010B2

公开(公告)日：2023-10-31

申请号：US16588072

申请日：2019-09-30

Applicant: Juniper Networks, Inc.

Inventor： Tarek Saad ,  Raveendra Torvi ,  Vishnu Pavan 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：US11770331B1

公开(公告)日：2023-09-26

申请号：US17527806

申请日：2021-11-16

Applicant: Juniper Networks, Inc.

Inventor： Kireeti Kompella ,  Vishnu Pavan Beeram ,  Swamy Sadashivaiah Kananda ,  Jonathan C. Barth ,  Tarek Saad ,  Chandrasekar Ramachandran ,  Srihari Ramachandra Sangli

IPC: H04L45/50 ,  H04L47/20

CPC classification number: H04L45/50 ,  H04L47/20

Abstract: A network device may receive an MPLS packet destined for a destination via a label-switched path (LSP), and may determine whether to apply a first special purpose label (SPL) option or a second SPL option for a label stack of the MPLS packet. The network device may apply, when the first SPL option is determined to be applied, one of a first type of the first SPL option for the label stack via a policy data indicator (PDI) and policy data (PD), or a second type of the first SPL option for the label stack via the PDI and the PD. The network device may forward the MPLS packet to a hop of the LSP based on the first type of the first SPL option or the second type of the first SPL option applied to the MPLS packet.

公开(公告)号：US11632296B2

公开(公告)日：2023-04-18

申请号：US16588072

申请日：2019-09-30

Applicant: Juniper Networks, Inc.

Inventor： Tarek Saad ,  Raveendra Torvi ,  Vishnu Pavan Beeram

IPC: 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.