公开(公告)号：US11356357B2

公开(公告)日：2022-06-07

申请号：US16892462

申请日：2020-06-04

Applicant: Cisco Technology, Inc.

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

IPC: H04L45/28 ,  H04L41/0677 ,  H04L45/00 ,  H04L45/48 ,  H04L45/748

Abstract: The present disclosure provides a proactive method of prefix disaggregation in a network fabric when one or more communication failures are detected. In one aspect, a method includes determining, by a first node of a network fabric, a corresponding prefix disaggregation policy for at least one second node of the network fabric, the corresponding prefix disaggregation policy identifying one or more network prefixes that are inaccessible via the first node when at least one communication failure is detected in association with the first node; sending the corresponding prefix disaggregation policy to the second node; and causing the second node to implement the prefix disaggregation policy upon detecting the at least one communication failure.

公开(公告)号：US11265763B2

公开(公告)日：2022-03-01

申请号：US16594316

申请日：2019-10-07

Applicant: Cisco Technology, Inc.

Inventor： Pascal Thubert ,  Patrick Wetterwald ,  Eric Levy-Abegnoli ,  Xiaoguang Jason Chen

IPC: H04W8/22 ,  H04W28/22

Abstract: In one embodiment, a device in a mesh network joins a source-destination oriented partial directed acyclic graph (SDO-PDAG) between a source node and a destination node in the network. The device receives operations, administration and maintenance (OAM) packets flooded along reverse paths of the SDO-PDAG. The device determines, based on the received OAM packets, packet drop rate (PDR) capacities of different paths between the device and the destination node. The device replicates a data packet sent from the source node to the destination node along two or more of the paths between the device and the destination node, based on the determined PDR capacities of those paths.

公开(公告)号：US11133976B2

公开(公告)日：2021-09-28

申请号：US16814255

申请日：2020-03-10

Applicant: Cisco Technology, Inc.

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

IPC: G06F13/00 ,  H04L12/24 ,  H04L29/08

Abstract: In one embodiment, a device in a network receives a query walker agent configured to query information from a distributed set of devices in the network based on a query. The device executes the query walker agent to identify the query. The device updates state information of the executing query walker agent using local information from the device and based on the query. The device unloads the executing query walker agent after updating the state information. The device propagates the query walker agent with the updated state information to one or more of the distributed set of devices in the network, when the updated state information does not fully answer the query.

公开(公告)号：US11050619B1

公开(公告)日：2021-06-29

申请号：US16782958

申请日：2020-02-05

Applicant: Cisco Technology, Inc.

Inventor： Li Zhao ,  Pascal Thubert ,  Huimin She ,  Lele Zhang

IPC: H04L12/24 ,  H04L29/12 ,  H04L12/753 ,  H04W84/18 ,  H04L29/08 ,  H04W8/00 ,  H04W4/70 ,  H04W4/80 ,  H04W4/38

Abstract: In one embodiment, a method comprises: detecting, by a root network device in a low power and lossy network (LLN) operating in a downward-routing mode, an outage among at least a substantial number of LLN devices in the LLN; initiating, by the root network device, a dynamic suspension of network operations in the LLN during the outage, including causing existing Internet Protocol (IP) addresses of all the LLN devices to be maintained during the outage, and causing all the LLN devices to limit transmissions to Power Outage Notification (PON) messages, Power Restoration Notification (PRN) messages, or minimal-bandwidth data packets, based on the root network device switching the LLN from the downward-routing mode to a collection-only mode; and selectively restoring, by the root network device, the LLN to the downward-routing mode in response to detecting PRN messages from at least substantially all the substantial number of LLN devices.

公开(公告)号：US11025702B2

公开(公告)日：2021-06-01

申请号：US16585761

申请日：2019-09-27

Applicant: Cisco Technology, Inc.

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

IPC: H04L29/08 ,  H04L12/721 ,  H04L12/26 ,  H04L12/729 ,  H04L12/771 ,  H04L12/24 ,  H04L12/727 ,  H04W4/70

Abstract: In one embodiment, a device in a network receives a path computation agent configured to determine a path in the network that satisfies an objective function. The device executes the path computation agent to update state information regarding the network maintained by the path computation agent. The device selects a neighbor of the device in the network to execute the path computation agent based on the updated state information regarding the network. The device instructs the selected neighbor to execute the path computation agent with the updated state information regarding the network. The device unloads the path computation agent from the device after selecting the neighbor of the device to execute the path computation agent.

公开(公告)号：US11013139B2

公开(公告)日：2021-05-18

申请号：US16514541

申请日：2019-07-17

Applicant: Cisco Technology, Inc.

Inventor： Pascal Thubert ,  Charles Calvin Byers

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

Abstract: Power supply for a networking device may be provided. The networking device may comprise a first plurality of switch bars each comprising a first switch type arranged parallel to one another and a second plurality of switch bars each comprising a second switch type arranged parallel to one another. The first plurality of switch bars and the second plurality of switch bars may be arranged orthogonally. A first plurality of power supplies may be fed by a first source. A second plurality of power supplies may be fed by a second source. Respective ones of a first portion of the first plurality of power supplies feed first respective pairs of the first plurality of switch bars and respective ones of a first portion of the second plurality of power supplies feed second respective pairs of the first plurality of switch bars. The first respective pairs of the first plurality of switch bars may be different from the second respective pairs of the first plurality of switch bars.

公开(公告)号：US20210075580A1

公开(公告)日：2021-03-11

申请号：US16564918

申请日：2019-09-09

Applicant: Cisco Technology, Inc.

Inventor： Pascal Thubert ,  Jerome Henry ,  Patrick Michel Pierre Wetterwald ,  Eric Michel Levy-Abegnoli

IPC: H04L5/00 ,  H04W72/04 ,  H04W72/08 ,  H04W16/10

Abstract: In one embodiment, an access point is configured with a plurality of resource units (RUs). Each RU is configured to use a frequency range that differs from frequency ranges used by the other RUs. The access point receives first information indicating, for each RU, a first signal quality that the station associates with the respective RU. The access point receives second information indicating, for each RU, a second signal quality that the station associates with the respective RU. The access point further determines, based on at least the first information and the second information, a pattern indicating a recurring signal quality that the station associates with each RU. The access point uses the pattern to allocate one of the RUs for communicating with the station.

公开(公告)号：US20210037069A1

公开(公告)日：2021-02-04

申请号：US17074955

申请日：2020-10-20

Applicant: Cisco Technology, Inc.

Inventor： Pascal Thubert ,  Xiaoqing Zhu ,  Giovanna Carofiglio

IPC: H04L29/06

Abstract: Embodiments include technologies for creating a manifest for a conferencing event in a network, adding a name tag identifying the conferencing event to the manifest, receiving an interest packet including one or more parameters indicating a named flow being produced at a source node, adding content metadata of the named flow to the manifest, and sending the manifest to the source node. Further embodiments include adding, to the manifest, session-level metadata associated with a user of the source node. Embodiments include receiving a second interest packet with one or more second parameters identifying a user of a client node, where the second interest packet indicates a request to authorize the user of the client node to subscribe to the conferencing event. In further embodiments, session-level metadata associated with the user is added to the manifest if the user is authorized to subscribe to the conferencing event.

公开(公告)号：US20210021510A1

公开(公告)日：2021-01-21

申请号：US17062061

申请日：2020-10-02

Applicant: Cisco Technology, Inc.

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

IPC: H04L12/707 ,  H04L12/851 ,  H04L12/26 ,  H04L12/46 ,  H04L29/06

Abstract: In one embodiment, a particular device in a deterministic network performs classification of one or more packets of a traffic flow between a source and a destination in the deterministic network. The particular device determines, based on the classification of the one or more packets, a requirement of the traffic flow. The particular device performs, based on the requirement, a packet operation on at least one packet of the traffic flow. The particular device sends packets of the traffic flow towards the destination via two or more paths in the deterministic network.

公开(公告)号：US20210014159A1

公开(公告)日：2021-01-14

申请号：US17038204

申请日：2020-09-30

Applicant: Cisco Technology, Inc.

Inventor： Mankamana Prasad Mishra ,  Pascal Thubert ,  IJsbrand Wijnands ,  Krishnaswamy Ananthamurthy ,  Ramakrishnan Chokkanathapuram Sundaram ,  Stig Ingvar Venaas

IPC: H04L12/721 ,  H04L12/761 ,  H04L12/749 ,  H04L12/755 ,  H04L12/753

Abstract: In one illustrative example, a network node connected in a network fabric may identify that it is established as part of a multicast distribution tree for forwarding multicast traffic from a source node to one or more host receiver devices of a multicast group. In response, the network node may propagate in the network fabric a message for advertising the network node as a candidate local source node at which to join the multicast group. The message for advertising may include data such as a reachability metric. The propagation of the message may be part of a flooding of such messages in the network fabric. The network node serving as the candidate local source node may thereafter “locally” join a host receiver device in the multicast group at the network node so that the device may receive the multicast traffic from the source node via the network node.