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211.发明授权公开(公告)号：US11290302B2
公开(公告)日：2022-03-29
申请号：US16747365
申请日：2020-01-20
Applicant: Cisco Technology, Inc.
Inventor： Pascal Thubert , Patrick Wetterwald , Eric Michel Levy-Abegnoli
Abstract: In one embodiment, a method comprises causing, by an apparatus, establishment of first and second multicast trees within one or more underlay switching fabrics of one or more fat tree topologies, the first and second multicast trees comprising first and second multicast roots for multicast transmission to leaf network devices in the respective first and second multicast trees; causing, by the apparatus, establishment of an overlay tunnel between the first and second multicast roots, the overlay tunnel independent and distinct from the first and second multicast trees; causing the first multicast root to multicast transmit, via the first multicast tree, a data packet having been transmitted to the first multicast root; and causing the first multicast root to unicast transmit the data packet to the second multicast root via the overlay tunnel, for multicast transmission of the data packet by the second multicast root via the second multicast tree.
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公开(公告)号：US11271844B2
公开(公告)日：2022-03-08
申请号：US16781270
申请日：2020-02-04
Applicant: Cisco Technology, Inc.
Inventor： Pascal Thubert , Eric Levy-Abegnoli , Jakob Heitz
IPC: H04L12/751 , H04L45/02
Abstract: A particular fat tree network node stores default routing information indicating that the particular fat tree network node can reach a plurality of parent fat tree network nodes of the particular fat tree network node. The particular fat tree network node obtains, from a first parent fat tree network node of the plurality of parent fat tree network nodes, a negative disaggregation advertisement indicating that the first parent fat tree network node cannot reach a specific destination. The particular fat tree network node determines whether the first parent fat tree network node is the only parent fat tree network node of the plurality of parent fat tree network nodes that cannot reach the specific destination. If so, the particular fat tree network node installs supplemental routing information indicating that every parent fat tree network node except the first parent fat tree network node can reach the specific destination.
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公开(公告)号：US11245678B2
公开(公告)日：2022-02-08
申请号：US16432661
申请日：2019-06-05
Applicant: Cisco Technology, Inc.
Inventor： Li Zhao , Pascal Thubert , Huimin She , Haibo Dong
IPC: H04L29/06 , H04W40/02 , H04W28/02 , H04W12/033
Abstract: In one embodiment, a method comprises: registering, by a root network device in a low power and lossy network, a constrained network device that is reachable within the low power and lossy network; obtaining, by the root network device, executable code associated with execution of a network service operation by the constrained network device; receiving a data packet from a source device and destined for the constrained network device; and causing execution on the data packet, by the root network device, of the network service operation on behalf of the constrained network device in response to reception of the data packet.
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公开(公告)号：US11218284B2
公开(公告)日：2022-01-04
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
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.
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215.发明授权公开(公告)号：US11212279B1
公开(公告)日：2021-12-28
申请号：US16266584
申请日：2019-02-04
Applicant: Cisco Technology, Inc.
Abstract: In one embodiment, a method comprises determining, by a link layer switch within a distributed link layer switched data network, a trust metric for a media access control (MAC) address used by a network device on a link layer connection provided by the link layer switch; receiving, by the link layer switch, a query originated by a second link layer switch in the distributed link layer switched data network, the query specifying the MAC address and a corresponding specified trust metric; and responding to the query, by the link layer switch, based on determining whether the specified trust metric indicates a higher trust level than the corresponding trust metric for the MAC address used by the network device on the link layer connection.
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Patent Agency Ranking
公开(公告)号：US20210385148A1
公开(公告)日：2021-12-09
申请号：US16892210
申请日：2020-06-03
Applicant: Cisco Technology, Inc.
Inventor： Nagendra Kumar Nainar , Carlos M. Pignataro , Pascal Thubert
IPC: H04L12/26
Abstract: This disclosure describes techniques for monitoring expected behavior of devices in a computing network. Behavior of network devices may include performing various functions associated with transferring data packets through the computing network. Monitoring expected behavior may include sending a probe packet into the computing network, and determining whether network devices behave as expected with respect to the probe packet. In some examples, behaviors such as replicating, forwarding, eliminating, ordering, and/or other functions regarding data packets may be validated using the present techniques. As computing networks and/or operations become more complex, assuring the expected behavior of network devices may become more important for the continued efficient, smooth, successful, and/or timely flow of data traffic.
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公开(公告)号：US11165748B1
公开(公告)日：2021-11-02
申请号：US17069579
申请日：2020-10-13
Applicant: Cisco Technology, Inc.
Inventor： Pascal Thubert , Eric Levy-Abegnoli , Jonas Zaddach , Patrick Wetterwald
IPC: G06F15/16 , H04L29/12 , H04L12/751 , H04L29/06
Abstract: Systems and methods may include sending, to a network registrar, an extended duplicate address request (EDAR) message including a first nonce generated by a host computing device, and receiving, from the network registrar, an extended duplicate address confirmation (EDAC) message including a second nonce, the second nonce being signed by the network registrar via a private key of a first public key infrastructure (PM) key pair of the network registrar via a first signature. The method further includes sending a first neighbor advertisement (NA) message to the host computing device including the second nonce. The second nonce and the private key of the network registrar verifies the first signature from the network registrar, the verification of the first signature indicating that the router is not impersonating the network.
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218.发明授权公开(公告)号：US11070526B2
公开(公告)日：2021-07-20
申请号：US16156176
申请日：2018-10-10
Applicant: Cisco Technology, Inc.
Inventor： Pascal Thubert , Xiaoguang Jason Chen , Samuel Rene Andre Pasquier , Ways Hassas , Christopher Scott Atherton Cheadle
Abstract: In one embodiment, a method includes: obtaining a multi-protocol schedule, wherein the multi-protocol schedule includes scheduling information characterizing packets associated with a plurality of wireless protocols, wherein each of the plurality of wireless protocols is associated with a respective virtual gateway of a plurality of virtual gateways; detecting, by a wireless transceiver, a first packet related to a first wireless protocol of the plurality of wireless protocols based on the multi-protocol schedule; and transmitting, by the wireless transceiver, the first packet related to the first wireless protocol to a first virtual gateway of the plurality of virtual gateways. According to some embodiments, the method is performed by a device (e.g., a MAC preprocessor) that includes a wireless transceiver, one or more processors, and non-transitory memory.
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219.发明授权公开(公告)号：US11057301B2
公开(公告)日：2021-07-06
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 , H04L12/753 , H04L12/723
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.
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220.发明授权公开(公告)号：US11044682B1
公开(公告)日：2021-06-22
申请号：US16814227
申请日：2020-03-10
Applicant: Cisco Technology, Inc.
Inventor： Pascal Thubert , Robert Edgar Barton , Jerome Henry , Eric Michel Levy-Abegnoli
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.
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