公开(公告)号：US11303586B2

公开(公告)日：2022-04-12

申请号：US17013414

申请日：2020-09-04

Applicant: Cisco Technology, Inc.

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

IPC: H04L12/861 ,  H04L49/90 ,  H04L47/125 ,  H04L47/11 ,  H04L49/25 ,  H04L49/50

Abstract: A source access network device multicasts copies of a packet to multiple core switches, for switching to a same target access network device. The core switches are selected for the multicast based on a load balancing algorithm managed by a central controller. The target access network device receives at least one of the copies of the packet and generates at least metric indicative of a level of traffic congestion at the core switches and feeds back information regarding the recorded at least one metric to the controller. The controller adjusts the load balancing algorithm based on the fed back information for selection of core switches for a subsequent data flow.

公开(公告)号：US20250141708A1

公开(公告)日：2025-05-01

申请号：US19008097

申请日：2025-01-02

Applicant: Cisco Technology, Inc.

Inventor： Pascal Thubert ,  Eric M. Levy-Abegnoli ,  Patrick M. P. Wetterwald ,  Ratko Kovacina

IPC: H04L12/18 ,  H04L9/40

Abstract: A method includes receiving, at a first edge node, an Internet Protocol (IP) multicast address of a first silent host node. The method further includes receiving, at a second edge node, an IP multicast address of a second silent host node. The IP multicast address of the first silent host node is equal to the IP multicast address of the second silent host node. The method further includes storing the IP multicast address of the first and second silent host node in a shared entry of a routing table. The method further includes receiving, at a third edge node, a packet from a third host node and determining that a destination address of the packet corresponds to the IP multicast address stored in the shared entry of the routing table. The method further includes sending the packet to both the first host node and the second host node.

公开(公告)号：US20230396459A1

公开(公告)日：2023-12-07

申请号：US18452917

申请日：2023-08-21

Applicant: Cisco Technology, Inc.

Inventor： Pascal Thubert ,  Eric M. Levy-Abegnoli ,  Patrick M. P. Wetterwald ,  Ratko Kovacina

IPC: H04L12/18 ,  H04L9/40

CPC classification number: H04L12/1886 ,  H04L12/1881 ,  H04L63/0227

Abstract: A method includes receiving, at a first edge node, an Internet Protocol (IP) multicast address of a first silent host node. The method further includes receiving, at a second edge node, an IP multicast address of a second silent host node. The IP multicast address of the first silent host node is equal to the IP multicast address of the second silent host node. The method further includes storing the IP multicast address of the first and second silent host node in a shared entry of a routing table. The method further includes receiving, at a third edge node, a packet from a third host node and determining that a destination address of the packet corresponds to the IP multicast address stored in the shared entry of the routing table. The method further includes sending the packet to both the first host node and the second host node.

公开(公告)号：US11470021B2

公开(公告)日：2022-10-11

申请号：US16172677

申请日：2018-10-26

Applicant: Cisco Technology, Inc.

Inventor： Pascal Thubert ,  Eric M. Levy-Abegnoli ,  Nagendra Kumar Nainar

IPC: H04L41/0893 ,  H04L47/6275 ,  H04L49/10 ,  H04L49/00 ,  H04L47/80 ,  H04L45/64 ,  G06N20/00

Abstract: Techniques for providing a non-blocking fabric in a network are described. A network controller determines the network requirement for various network traffic types on the network and determines the allocation of resources across the network needed to establish a midlay, including midlay components on the network. The network controller then establishes the midlay on the network according to the determined allocation. At least one of the midlay components is a virtually non-blocking fabric for high-priority traffic or fully non-blocking fabric for deterministic traffic.

公开(公告)号：US12212427B2

公开(公告)日：2025-01-28

申请号：US18452917

申请日：2023-08-21

Applicant: Cisco Technology, Inc.

Inventor： Pascal Thubert ,  Eric M. Levy-Abegnoli ,  Patrick M. P. Wetterwald ,  Ratko Kovacina

IPC: H04L12/18 ,  H04L9/40

Abstract: A method includes receiving, at a first edge node, an Internet Protocol (IP) multicast address of a first silent host node. The method further includes receiving, at a second edge node, an IP multicast address of a second silent host node. The IP multicast address of the first silent host node is equal to the IP multicast address of the second silent host node. The method further includes storing the IP multicast address of the first and second silent host node in a shared entry of a routing table. The method further includes receiving, at a third edge node, a packet from a third host node and determining that a destination address of the packet corresponds to the IP multicast address stored in the shared entry of the routing table. The method further includes sending the packet to both the first host node and the second host node.

公开(公告)号：US10771405B2

公开(公告)日：2020-09-08

申请号：US16172598

申请日：2018-10-26

Applicant: Cisco Technology, Inc.

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

IPC: H04L12/861 ,  H04L12/803 ,  H04L12/801 ,  H04L12/947 ,  H04L12/931

Abstract: A source access network device multicasts copies of a packet to multiple core switches, for switching to a same target access network device. The core switches are selected for the multicast based on a load balancing algorithm managed by a central controller. The target access network device receives at least one of the copies of the packet and generates at least metric indicative of a level of traffic congestion at the core switches and feeds back information regarding the recorded at least one metric to the controller. The controller adjusts the load balancing algorithm based on the fed back information for selection of core switches for a subsequent data flow.

公开(公告)号：US11863348B2

公开(公告)日：2024-01-02

申请号：US17368595

申请日：2021-07-06

Applicant: Cisco Technology, Inc.

Inventor： Pascal Thubert ,  Amine Choukir ,  Domenico Ficara ,  Eric M. Levy-Abegnoli ,  Bhavik Fajalia ,  Gokul Bhoothanathan Kailasanatha Subramania

IPC: H04L12/46 ,  H04L67/563

CPC classification number: H04L12/4633 ,  H04L12/4641 ,  H04L67/563

Abstract: A method includes receiving, at a home controller of a home domain and from a first device in the home domain, a first message concerning a user device that is anchored to the home domain and that has roamed from the home domain to a visitor domain. The method also includes, in response to determining that the first device is a router, opening a tunnel between the home controller and a visitor controller of the visitor domain and communicating the first message to the user device through the tunnel. The method further includes receiving, at the home controller and from a second device in the home domain, a second message concerning the user device and in response to determining that the second device is not a router, communicating, to the second device, a proxy response to the second message.

公开(公告)号：US20220417213A1

公开(公告)日：2022-12-29

申请号：US17362485

申请日：2021-06-29

Applicant: Cisco Technology, Inc.

Inventor： Pascal Thubert ,  Eric M. Levy-Abegnoli ,  Patrick M. P. Wetterwald ,  Jonas Zaddach

IPC: H04L29/06

Abstract: The present disclosure is directed to systems and methods for first hop security in a multi-site and multi-vendor cloud. The method may include receiving, at a first hop security (FHS) device located within a defined security perimeter, a message from a first host; validating a security of the message; signing the message with a signature to prove validation of the message, the signature comprising at least a Crypto-ID Parameters Option (CIPO) and a Neighbor Discovery Protocol Signature Option (NDPSO); and transmitting the signed message to one or more network FHS devices within the security perimeter.

公开(公告)号：US20200252300A1

公开(公告)日：2020-08-06

申请号：US16268796

申请日：2019-02-06

Applicant: Cisco Technology, Inc.

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

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

Abstract: In one embodiment, a supervisory device for a software defined networking (SDN) fabric obtains telemetry data regarding congestion levels on a plurality of links in the SDN fabric. The supervisory device predicts seasonal congestion on a particular one of the plurality of links by using the telemetry data as input to a machine learning-based model. The supervisory device identifies a period of time associated with the predicted seasonal congestion on the particular link. The supervisory device initiates, in advance of the identified period of time, re-computation of equal-cost multi-path (ECMP) weights associated with the plurality of links that prevent occurrence of the predicted seasonal congestion on the particular link during the identified period of time.

公开(公告)号：US11784970B2

公开(公告)日：2023-10-10

申请号：US17362485

申请日：2021-06-29

Applicant: Cisco Technology, Inc.

Inventor： Pascal Thubert ,  Eric M. Levy-Abegnoli ,  Patrick M. P. Wetterwald ,  Jonas Zaddach

IPC: H04L9/40

CPC classification number: H04L63/0209 ,  H04L63/12

Abstract: The present disclosure is directed to systems and methods for first hop security in a multi-site and multi-vendor cloud. The method may include receiving, at a first hop security (FHS) device located within a defined security perimeter, a message from a first host; validating a security of the message; signing the message with a signature to prove validation of the message, the signature comprising at least a Crypto-ID Parameters Option (CIPO) and a Neighbor Discovery Protocol Signature Option (NDPSO); and transmitting the signed message to one or more network FHS devices within the security perimeter.