公开(公告)号：US20220141131A1

公开(公告)日：2022-05-05

申请号：US17089481

申请日：2020-11-04

Applicant: Cisco Technology, Inc.

Inventor： Jaganbabu Rajamanickam ,  Nagendra Kumar Nainar ,  Darren Russell Dukes ,  Carlos M. Pignataro ,  Madhan Sankaranarayanan

IPC: H04L12/721 ,  H04L12/26 ,  H04L12/751 ,  H04L12/741

Abstract: Techniques for utilizing edge nodes disposed throughout a multi-site cloud computing network to generate a probe packet including indicators that guarantee the use of forward and return route paths to accurately measure the network performance of a route path between two endpoints in a wide area network (WAN). An edge node disposed in a site of the multi-site cloud computing network may store in virtual memory associated with the edge node, a mapping between route paths, usable to send data from the edge node to remote edge nodes in remote sites, and route indicators. A probe packet may include a data portion for measuring the network performance of a route path, a portion including local and remote discriminators, and/or an inner and an outer header.

公开(公告)号：US20220116261A1

公开(公告)日：2022-04-14

申请号：US17070648

申请日：2020-10-14

Applicant: Cisco Technology, Inc.

Inventor： Carlos M. Pignataro ,  Nagendra Kumar Nainar ,  Jaganbabu Rajamanickam ,  Madhan Sankaranarayanan ,  Prakash Jain

IPC: H04L12/24 ,  H04L12/26

Abstract: A method is performed by a node configured to implement an Operation, Administration, and Maintenance (OAM) protocol for rapid link failure detection. The node receives peer OAM packets sent by a peer node over a link at a peer periodic interval. While in a first mode of the OAM protocol, the node determines whether the peer node is reachable based on the peer OAM packets, sends OAM packets to the peer node at a periodic interval to indicate to the peer node that the node is reachable, and responsive to detecting a critical condition of the node that impairs the sending the OAM packets, transitions to a second mode of the OAM protocol. While in the second mode, the node adds, to the peer OAM packets, a code to indicate the critical condition, and reflects the peer OAM packets with the code back to the peer node.

公开(公告)号：US11265228B2

公开(公告)日：2022-03-01

申请号：US16829489

申请日：2020-03-25

Applicant: Cisco Technology, Inc.

Inventor： Nagendra Kumar Nainar ,  Carlos M. Pignataro ,  Joseph M. Clarke

IPC: H04L12/24 ,  H04L41/5019 ,  H04L43/106 ,  H04L43/0829 ,  H04L41/5009 ,  H04L43/087

Abstract: An ingress node inserts into a header of a packet service level agreement information and forwards the packet. At an egress node of the network, the packet is received and the service level agreement information is obtained from the header of the packet. The egress node verifies whether there is conformance to a service level agreement based on at least one parameter associated with reception of one or more packets at the egress node and the service level agreement information.

公开(公告)号：US20210328913A1

公开(公告)日：2021-10-21

申请号：US16853331

申请日：2020-04-20

Applicant: Cisco Technology, Inc.

Inventor： Nagendra Kumar Nainar ,  Carlos M. Pignataro ,  Alejandro Eguiarte ,  Rajiv Asati

IPC: H04L12/721 ,  H04L12/751 ,  H04L12/741 ,  H04L12/46

Abstract: Techniques for defining a service flow definition among container pods that provide services in a network. The techniques may include an orchestrator of a computer network platform of the network determining which container pods need to communicate with which container pods. The service flow definition thus indicates needed paths between the container pods. In configurations, a cluster topology may be determined where the cluster topology indicates corresponding nodes of the network in which each container pod is located, as well as end points of the network with which the corresponding nodes communicate. Based at least in part on the service flow definition and the cluster topology, corresponding route distribution policies may be determined for the end points. The corresponding route distribution policies may be applied to the end points.

公开(公告)号：US20210279619A1

公开(公告)日：2021-09-09

申请号：US16811806

申请日：2020-03-06

Applicant: Cisco Technology, Inc.

Inventor： Hugo Latapie ,  Enzo Fenoglio ,  Carlos M. Pignataro ,  Nagendra Kumar Nainar ,  David Delano Ward

IPC: G06N5/04 ,  G06F16/27

Abstract: In one embodiment, a first deep fusion reasoning engine (DFRE) agent in a network receives first sensor data from a first set of one or more sensors in the network. The first DFRE agent translates the first sensor data into symbolic data. The first DFRE agent applies, using a symbolic knowledge base maintained by the first DFRE agent, symbolic reasoning to the symbolic data to make an inference regarding the first sensor data. The first DFRE agent updates, based on the inference regarding the first sensor data, the knowledge base. The first DFRE agent propagates the inference to one or more other DFRE agents in the network.

公开(公告)号：US11115298B2

公开(公告)日：2021-09-07

申请号：US16601926

申请日：2019-10-15

Applicant: Cisco Technology, Inc.

Inventor： Nagendra Kumar Nainar ,  Carlos M. Pignataro ,  Joseph M. Clarke

IPC: H04L12/26 ,  H04L12/24

Abstract: A method is provided that involves obtaining service pre-conditions associated with a service to be supported in a network. The method includes providing a plurality of digital Intellectual Capital (IC) modules, and providing signature pre-condition logic that specifies one or more conditions that indicate relevancy of one or more digital IC modules. The method includes selecting, from the plurality of digital IC modules, based on the service pre-conditions and the signature pre-condition logic, one or more particular digital IC modules that are applicable to the service in the network. The method further includes determining information to be obtained from one or more nodes in the network based on the one or more particular digital IC modules, and obtaining the information from the one or more nodes in the network. The information is analyzed to determine whether the one or more specific operational issues are present in the network.

公开(公告)号：US11082308B2

公开(公告)日：2021-08-03

申请号：US16383956

申请日：2019-04-15

Applicant: Cisco Technology, Inc.

Inventor： Nobushige Akiya ,  Carlos M. Pignataro ,  Nagendra Kumar Nainar ,  Paul Quinn ,  James Guichard

IPC: H04L12/24

Abstract: In one embodiment, a system and method are disclosed for sending a request and receiving a reply. The request contains a network service header including a flow label field and a target index field. The flow label field contains a set of available flow labels. The target index field includes a value indicating a target node. The reply contains information indicating which of the flow labels can be used to route a packet to each of the next hop nodes downstream from the device that sent the reply. This process can be repeated for other nodes on a path, and other paths in a service topology layer. The information determined by this process can be used to perform other necessary functionalities at the service topology layer.

公开(公告)号：US20210111992A1

公开(公告)日：2021-04-15

申请号：US16601944

申请日：2019-10-15

Applicant: Cisco Technology, Inc.

Inventor： Nagendra Kumar Nainar ,  Carlos M. Pignataro ,  Benoit Claise

IPC: H04L12/709 ,  H04L12/721 ,  H04L12/803 ,  H04L12/26

Abstract: Techniques are presented herein for determining equal cost multi-path (ECMP) performance health in a network. In accordance with an example embodiment, a method is provided that involves obtaining information indicating ECMP paths in a network, the network comprises of a plurality of nodes that includes at least one branch node. The method includes configuring the branch node to obtain ECMP performance metrics, and obtaining the ECMP performance metrics from the branch node. The method further includes analyzing the ECMP performance metrics to determine ECMP performance health of the branch node.

公开(公告)号：US10972377B2

公开(公告)日：2021-04-06

申请号：US16231096

申请日：2018-12-21

Applicant: Cisco Technology, Inc.

Inventor： Nagendra Kumar Nainar ,  Carlos M. Pignataro ,  Frank Brockners ,  Shwetha Subray Bhandari

IPC: H04L12/715 ,  H04L12/751 ,  H04L29/06 ,  H04L12/24 ,  H04L12/741

Abstract: In one embodiment, network nodes coordinate recording of In-Situ Operations, Administration, and Maintenance (IOAM) data in packets traversing the network nodes, including a node adding IOAM data of another node to packets on behalf of the another node. After receiving a particular packet, a network node adds first IOAM data and second IOAM data to the particular packet, with the first IOAM data related to the first network node and the second IOAM data related to a second network node. The packet is then sent from the first network node. The coordinated offloading of the adding of IOAM data to packets allows a node to free up resources currently used for IOAM operations to be used for other packet processing operations, while still having IOAM data related to the node recorded in packets. The coordinated offloading may include control plane communication (e.g., via a routing or other protocol).

公开(公告)号：US10958506B2

公开(公告)日：2021-03-23

申请号：US15834284

申请日：2017-12-07

Applicant: Cisco Technology, Inc.

Inventor： Carlos M. Pignataro ,  Nagendra Kumar Nainar ,  Rajiv Asati

IPC: H04L12/24 ,  H04L12/851

Abstract: A system and method predict risks of failure or performance issues in a network to predictively position traffic flows in the network. For a traffic flow through a network, first data accumulated in a header of packets for the traffic flow is obtained, which header is populated by network elements along a path of the traffic flow through the network. Second data is obtained about the network in general including other network elements not along the path of the traffic flow. Machine learning analysis is performed to derive rules that characterize failure or performance risk issues in the network. The rules and topology data describing a topology of the network are applied to a model to create a topological graphical representation indicating failure or performance issues in the network that affect the traffic flow. A path for the traffic flow is modified based on the topological graphical representation.