公开(公告)号：US10959199B2

公开(公告)日：2021-03-23

申请号：US16451098

申请日：2019-06-25

Applicant: Cisco Technology, Inc.

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

IPC: H04W56/00 ,  H04W84/18

Abstract: In one embodiment, a method comprises: detecting, by a constrained network device in a low power and lossy network, a loss of synchronization with a neighboring network device based on a determined absence of a prescribed transmission activity by the neighboring network device within a prescribed listening interval that is limited to a prescribed guard time according to a wireless time-slotted transmission protocol; and executing, by the constrained network device, localized sync recovery based on shifting a next listening interval to a shifted listening interval based on selectively shifting, based on a selected shift amount, the prescribed guard time of a corresponding next instance of the prescribed listening interval, enabling the constrained network device to recover synchronization with the neighboring network device based on detecting the prescribed transmission activity that is outside the prescribed listening interval and within the shifted listening interval.

公开(公告)号：US10952115B2

公开(公告)日：2021-03-16

申请号：US16359011

申请日：2019-03-20

Applicant: Cisco Technology, Inc.

Inventor： Jean-Philippe Vasseur ,  Pascal Thubert ,  Jerome Henry

IPC: H04W36/22 ,  H04W36/08 ,  H04W36/32 ,  H04W52/40 ,  H04W36/38 ,  H04W84/12

Abstract: In one embodiment, a supervisory service for a wireless network receives telemetry data indicative of client movement of wireless clients of the network within a location. The service determines a measure of client movement stability for the location, based on the received telemetry data. The service selects one or more of the clients for wireless access point reassignment, when the determined measure of client movement stability exceeds a predefined threshold. The service causes the selected one or more clients to switch from a first wireless access point at the location to a second wireless access point at the location.

公开(公告)号：US10951463B2

公开(公告)日：2021-03-16

申请号：US16366053

申请日：2019-03-27

Applicant: Cisco Technology, Inc.

Inventor： Jakob Heitz ,  Dhananjaya Kasargod Rao ,  Pascal Thubert

IPC: H04L12/24 ,  H04L12/703 ,  H04L12/933 ,  H04L12/745

Abstract: The present disclosure provides Border Gateway Protocol route aggregation in a Clos fabric when one or more communication failures are detected. A method includes receiving a prefix component of a first aggregate route from a first next hop node, the prefix component being associated with a failed network element; announcing, to one or more neighboring nodes, the first aggregate route along with the prefix component and the first next hop node associated with the failed network element; identifying, by the one or more neighboring nodes, a second aggregate route, the second aggregate route being a shortest aggregate route that contains the first aggregate route; and generating, from the second aggregate route, one or more Chad routes to the prefix component of the first aggregate route, wherein the one or more Chad routes are associated with one or more next hop nodes that are different from the first next hop node.

公开(公告)号：US10945296B2

公开(公告)日：2021-03-09

申请号：US16246953

申请日：2019-01-14

Applicant: Cisco Technology, Inc.

Inventor： Pascal Thubert ,  Feiliang Wang ,  Huimin She ,  Patrick Wetterwald

IPC: H04W74/08 ,  H04W56/00 ,  H04W74/00

Abstract: In one embodiment, a parent device in an unaligned wireless network may determine a superframe comprising a header timeslot followed by a plurality of sub timeslots. The parent device may transmit, to a plurality of child devices in the unaligned wireless network, a beacon during the header timeslot, wherein the beacon comprises i) synchronization information used by the plurality of child devices to synchronize to the header timeslot and ii) reservation information that indicates one or more reserved sub timeslots of the plurality of sub timeslots. The parent device may receive, from a particular child device of the plurality of child devices, a message during a particular sub timeslot of the plurality of sub timeslots that is different than the one or more reserved sub timeslots.

公开(公告)号：US20210058478A1

公开(公告)日：2021-02-25

申请号：US16545225

申请日：2019-08-20

Applicant: Cisco Technology, Inc.

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

IPC: H04L29/08 ,  H04L29/12

Abstract: Presented herein are techniques that aggregate messages using a subroot node. A plurality of messages is received from a corresponding plurality of nodes by a subroot node acting as a proxy in a wireless mesh sub-network. The plurality of messages is aggregated into a single message according to a template. The single message is wireless transmitted to a root node, wherein the root node has a wired connection to a network.

公开(公告)号：US10904157B2

公开(公告)日：2021-01-26

申请号：US16376617

申请日：2019-04-05

Applicant: Cisco Technology, Inc.

Inventor： Pascal Thubert ,  Jerome Henry ,  Robert E. Barton

IPC: H04W24/04 ,  H04L12/875 ,  H04L12/841 ,  H04L12/863 ,  H04L12/935 ,  H04L12/825 ,  H04L12/861 ,  H04L12/26 ,  H04L12/931

Abstract: Telemetry for cloud switches queuing excursion may be provided. A first hysteresis threshold and a second hysteresis threshold for a queue of the network switch may be specified. Next, a queue position relative to the first hysteresis threshold and the second hysteresis threshold may be determined for each incoming packets for the queue. A number of crossings including the queue position passing the first hysteresis threshold and subsequently passing the second hysteresis threshold in a first predetermined time period may be determined. A number of data packets being sent to the queue of the network switch may then be altered based on one or more of the number of crossings, the first hysteresis threshold, and the second hysteresis threshold.

公开(公告)号：US10887224B2

公开(公告)日：2021-01-05

申请号：US16397124

申请日：2019-04-29

Applicant: Cisco Technology, Inc.

Inventor： Pascal Thubert ,  Huimin She ,  Patrick Wetterwald ,  Li Zhao

IPC: H04L12/46 ,  H04L12/751 ,  H04L12/753 ,  H04L29/08

Abstract: In one embodiment, a method comprises attaching, by a constrained network device in a data network, to a first parent network device in a tree-based storing mode topology in response to receiving a first advertisement message generated by the first parent network device; outputting to the first parent network device a plurality of routes stored in the constrained network device, the routes identifying destinations reachable via the constrained network device; determining, by the constrained network device, that the first parent network device is encountering saturation of stored routes based on the constrained network device receiving a second advertisement message from the first parent network device; and eliminating, by the constrained network device, the saturation encountered by the first parent network device based on moving at least a portion of the routes from the first parent network device to a second parent network device in the tree-based storing mode topology.

公开(公告)号：US10812388B2

公开(公告)日：2020-10-20

申请号：US16269723

申请日：2019-02-07

Applicant: Cisco Technology, Inc.

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

IPC: H04L12/803 ,  H04L12/24 ,  H04L12/715 ,  H04L12/851

Abstract: In one embodiment, a supervisory device for a software defined networking (SDN) fabric predicts a failure in the SDN fabric using a machine learning-based failure prediction model. The supervisory device identifies a plurality of traffic flows having associated leaves in the SDN fabric that would be affected by the predicted failure. The supervisory device selects a subset of the identified plurality of traffic flows and their associated leaves. The supervisory device disaggregates routes for the selected subset of traffic flows and their associated leaves, to avoid the predicted failure.

公开(公告)号：US20200305049A1

公开(公告)日：2020-09-24

申请号：US16359011

申请日：2019-03-20

Applicant: Cisco Technology, Inc.

Inventor： Jean-Philippe Vasseur ,  Pascal Thubert ,  Jerome Henry

IPC: H04W36/22 ,  H04W36/08 ,  H04W36/38 ,  H04W36/32 ,  H04W52/40

Abstract: In one embodiment, a supervisory service for a wireless network receives telemetry data indicative of client movement of wireless clients of the network within a location. The service determines a measure of client movement stability for the location, based on the received telemetry data. The service selects one or more of the clients for wireless access point reassignment, when the determined measure of client movement stability exceeds a predefined threshold. The service causes the selected one or more clients to switch from a first wireless access point at the location to a second wireless access point at the location.

公开(公告)号：US20200304406A1

公开(公告)日：2020-09-24

申请号：US16360101

申请日：2019-03-21

Applicant: Cisco Technology, Inc.

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

IPC: H04L12/715 ,  H04L12/46 ,  H04L12/723 ,  H04L12/753

Abstract: In one embodiment, a device configures a plurality of subinterfaces for each of a plurality of physical ports of a software defined network (SDN). The device allocates a fixed amount of bandwidth to each of the subinterfaces. The device forms a plurality of midlays for the SDN by assigning subsets of the plurality of subinterfaces to each of the midlays. The device assigns a network slice to one or more of the midlays, based on a bandwidth requirement of the network slice.