公开(公告)号：US20220295423A1

公开(公告)日：2022-09-15

申请号：US17831009

申请日：2022-06-02

Applicant: Cisco Technology, Inc.

Inventor： Pascal Thubert ,  Robert Edgar Barton ,  Jerome Henry ,  Eric Michel Levy-Abegnoli

IPC: H04W52/38 ,  H04W40/24 ,  H04W24/02

Abstract: In one embodiment, a method comprises: determining, by a constrained network device in a low power and lossy network (LLN), a self-estimated density value of neighboring LLN devices based on wirelessly receiving an identified number of beacon message transmissions within an identified time interval from neighboring transmitting LLN devices in the LLN; setting, by the constrained network device, a first wireless transmit power value based on the self-estimated density value; and transmitting a beacon message at the first wireless transmit power value, the beacon message specifying the self-estimated density value, a corresponding trust metric for the self-estimated density value, and the first wireless transmit power value used by the constrained network device for transmitting the beacon message.

公开(公告)号：US11196588B2

公开(公告)日：2021-12-07

申请号：US16585839

申请日：2019-09-27

Applicant: Cisco Technology, Inc.

Inventor： Pascal Thubert ,  Ramakrishnan Chokkanathapuram Sundaram ,  Patrick Wetterwald ,  Eric Michel Levy-Abegnoli

IPC: H04L12/44 ,  H04L12/18 ,  H04L29/06 ,  H04L12/46 ,  H04L12/28 ,  H04L12/64 ,  H04L12/751 ,  H04L12/721

Abstract: A method includes identifying within a network topology, by an apparatus, a plurality of network devices; and establishing by the apparatus, a multiple tree topology comprising a first multicast tree and a second multicast tree, the first and second multicast trees operable as redundant trees for multicast traffic in the network topology, the establishing including: allocating a first of the network devices as a corresponding root of the first multicast tree, allocating a first group of intermediate devices from the network devices as first forwarding devices in the first multicast tree, allocating a second group of intermediate devices as belonging to first leaf devices in the first multicast tree, and allocating terminal devices of the network devices as belonging to the first leaf devices, and allocating a second of the network devices as the corresponding root of the second multicast tree, allocating the second group of intermediate devices as second forwarding devices in the second multicast tree, allocating the first group of intermediate devices as belonging to second leaf devices in the second multicast tree, and allocating the terminal devices as belonging to the second leaf devices.

公开(公告)号：US20210359932A1

公开(公告)日：2021-11-18

申请号：US15930803

申请日：2020-05-13

Applicant: Cisco Technology, Inc.

Inventor： Nagendra Kumar Nainar ,  Carlos M. Pignataro ,  Reshad Rahman ,  Pascal Thubert

IPC: H04L12/707 ,  H04L12/26

Abstract: In one example, a responder obtains an Operations, Administration, and Management/Maintenance (OAM) probe packet from a network entity operating as an initiator in a network, provides, to the initiator, a first response to the OAM probe packet over a first network path in the network, and further provides, to the initiator, a second response to the OAM probe packet over a second network path in the network that is different from the first network path. In another example, an initiator provides an OAM probe packet to a network entity operating as responder in a network, obtains, from the responder, a first response to the OAM probe packet over a first network path in the network, and further obtains, from the responder, a second response to the OAM probe packet over a second network path in the network that is different from the first network path.

公开(公告)号：US11108678B2

公开(公告)日：2021-08-31

申请号：US15845291

申请日：2017-12-18

Applicant: Cisco Technology, Inc.

Inventor： Pascal Thubert ,  Enzo Fenoglio ,  Jean-Philippe Vasseur ,  Hugo Latapie

IPC: G06F15/173 ,  H04L12/751 ,  H04L12/725 ,  H04L12/24 ,  H04L12/851 ,  H04L12/707

Abstract: In one embodiment, a controller in a network trains a deep reinforcement learning-based agent to predict traffic flows in the network. The controller determines one or more resource requirements for the predicted traffic flows. The controller assigns, using the deep reinforcement learning-based agent, paths in the network to the flows based on the determined one or more resource requirements, to avoid fragmentation of a flow during transmission of the flow through the network. The controller sends, to nodes in the network, assignment instructions that cause the flows to traverse the network via their assigned paths.

公开(公告)号：US11102907B2

公开(公告)日：2021-08-24

申请号：US16514497

申请日：2019-07-17

Applicant: Cisco Technology, Inc.

Inventor： Pascal Thubert ,  Charles Calvin Byers

IPC: H05K7/14 ,  H01R13/193 ,  H05K7/20 ,  H05K7/16 ,  G02B6/42 ,  H01R43/26 ,  G01J1/44 ,  H04Q11/00 ,  H04L12/933 ,  G06F1/26 ,  G06F1/3209 ,  H04B10/60 ,  H04B10/50

Abstract: Networking device serviceability may be provided. A networking device may be disposed in a rack between uprights. The networking device may comprise a first plurality of switch bars each comprising a first switch type arranged parallel to one another, a second plurality of switch bars each comprising a second switch type arranged parallel to one another, and a third plurality of switch bars each comprising a third switch type arranged parallel to one another. The first plurality of switch bars, the second plurality of switch bars, and the third plurality of switch bars may be arranged orthogonally. A hinge device associated with the networking device may be configured to allow the networking device to rotate at least a predetermined angle value from a first position between the uprights to a second position where both the first plurality of switch bars and the second plurality of switch bars are clear from the uprights.

公开(公告)号：US11057211B2

公开(公告)日：2021-07-06

申请号：US16214318

申请日：2018-12-10

Applicant: Cisco Technology, Inc.

Inventor： Pascal Thubert ,  Huimin She ,  Patrick Wetterwald ,  Akram Ismail Sheriff ,  Eric Michel Levy-Abegnoli

IPC: H04L9/32 ,  H04L29/12 ,  H04L9/30 ,  G06F16/901

Abstract: In one embodiment, a method comprises: receiving, by a parent network device providing at least a portion of a directed acyclic graph (DAG) according to a prescribed routing protocol in a low power and lossy network, a destination advertisement object (DAO) message, the DAO message specifying a target Internet Protocol (IP) address claimed by an advertising network device in the DAG and the DAO message further specifying a secure token associated with the target IP address; and selectively issuing a cryptographic challenge to the DAO message to validate whether the advertising network device generated the secure token.

公开(公告)号：US11036571B2

公开(公告)日：2021-06-15

申请号：US15825248

申请日：2017-11-29

Applicant: Cisco Technology, Inc.

Inventor： Patrick Wetterwald ,  Pascal Thubert ,  Eric Levy-Abegnoli ,  Jean-Philippe Vasseur

IPC: G06F11/07 ,  H04L29/08 ,  H04B17/309 ,  H04L29/06 ,  G06F9/50 ,  G06F15/16 ,  G06F13/14 ,  H04B17/14 ,  H04L12/24

Abstract: In one embodiment, a supervisory device in a network receives a help request from a first node in the network indicative of a problem in the network detected by the first node. The supervisory device identifies a second node in the network that is hosting a repair walker agent able to address the detected problem. The supervisory device determines a network path via which the second node is to send repair walker agent to the first node. The supervisory device instructs the second node to send the repair walker agent to the first node via the determined path.

公开(公告)号：US10973148B2

公开(公告)日：2021-04-06

申请号：US16514430

申请日：2019-07-17

Applicant: Cisco Technology, Inc.

Inventor： Pascal Thubert ,  Charles Calvin Byers

IPC: G01J1/44 ,  H04L12/933 ,  H05K7/14 ,  H04Q11/00 ,  G06F1/3209 ,  H01R13/193 ,  H05K7/20 ,  H05K7/16 ,  H01R43/26 ,  G06F1/26 ,  G02B6/42 ,  H04B10/60 ,  H04B10/50

Abstract: A networking device with orthogonal switch bars may be provided. The networking device may comprise a first plurality of switch bars comprising leaf switches arranged parallel to one another. In addition, the networking device may comprise a second plurality of switch bars comprising top of pod switches arranged parallel to one another. Furthermore, the networking device may comprise a third plurality of switch bars comprising top of fabric switches arranged parallel to one another. The first plurality of switch bars, the second plurality of switch bars, and the third plurality of switch bars may be arranged mutually orthogonally. The first plurality of switch bars may be adjacent to and connected to the second plurality of switch bars and the second plurality of switch bars may be adjacent to and connected to the third plurality of switch bars.

公开(公告)号：US20210068137A1

公开(公告)日：2021-03-04

申请号：US16560852

申请日：2019-09-04

Applicant: Cisco Technology, Inc.

Inventor： Pascal Thubert ,  Patrick Wetterwald ,  Eric Levy-Abegnoli

IPC: H04W72/12 ,  H04B7/14 ,  H04B17/318 ,  H04W40/24

Abstract: The aspects ensure redundancy by including at least two access points (APs), in an environment, that are capable of serving at least one station (STA). A first AP functions as a primary AP and a second AP functions as a secondary AP. The primary AP can send a layer 2 (L2) control message, for example, a Target Wait Time (TWT) response, to a STA. The primary AP may then wait for an indication (e.g., an Acknowledgement (ACK) signal) of receipt of the L2 control message. The primary AP can also provide the L2 control message to the secondary AP that covers the same room. In at least some configurations, the L2 control message includes metadata about when the secondary AP is to send the copy of the L2 control message over the air. The secondary AP can then relay the L2 control message to the STA.

公开(公告)号：US10911400B2

公开(公告)日：2021-02-02

申请号：US15156571

申请日：2016-05-17

Applicant: Cisco Technology, Inc.

Inventor： Eric Levy-Abegnoli ,  Patrick Wetterwald ,  Pascal Thubert

IPC: G06F15/16 ,  H04L29/12 ,  H04L29/08 ,  G06F16/951 ,  H04W4/70

Abstract: In one embodiment, a tracking device detects a first device connecting to a computer network, and forces an install of fake routing information on the first device that is unique to the first device. Upon detecting a second device connecting to the computer network, the second device having at least one identifying property in common with the first device and at least one identifying property differing from the first device, the tracking device may then query the second device to determine if the second device knows the fake routing information unique to the first device. As such, the tracking device may then determine that the second device is the first device in response to the second device knowing the fake routing information unique to the first device.