公开(公告)号：US11546184B2

公开(公告)日：2023-01-03

申请号：US17364173

申请日：2021-06-30

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Tathagata Nandy ,  Chethan Chavadibagilu Radhakrishnabhat

IPC: H04L12/18

Abstract: Some examples relate to selection of a rendezvous point in an IP multicast network managing multicast group traffic. An example includes transmitting, from a controller in a cloud computing system, messages to a source device and a host device in an IP multicast-capable network, which may include two peer network devices that are virtualized to function as one virtual device. Based on the response to the messages, the controller may determine that the source device is present in OSI layer 3 and the host device is present in OSI layer 2. The controller may determine that the peer network are located downstream in relation to the determined layer of the source device. The controller may select a non-peer network device as a rendezvous point in the IP multicast-capable network. Further to the selection, the controller may synchronize an active-active configuration between the peer network devices.

公开(公告)号：US20220417287A1

公开(公告)日：2022-12-29

申请号：US17409179

申请日：2021-08-23

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Vinayak Joshi ,  Venkatavaradhan Devarajan ,  Rajib Majila ,  Tathagata Nandy

IPC: H04L29/06

Abstract: Examples disclosed herein relate to a method for defining an ingress access policy at an ingress network device based on instructions from an egress network device. The egress network device receives data packets directed to a first entity from a second entity connected to an ingress network device. Each data packet transmitted includes a source role tag corresponding to the second entity. At the egress network device, the data packets may be dropped based on the enforcement of an egress access policy. When the number of data packets that are being dropped increases beyond a pre-defined threshold, the egress network device transmits a command to the ingress network device instructing the ingress network device to create a restriction on the transmission of subsequent data packets. The command is transmitted in a Border Gateway Protocol (BGP) Flow Specification (FlowSpec) route.

公开(公告)号：US20220400086A1

公开(公告)日：2022-12-15

申请号：US17346933

申请日：2021-06-14

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Tathagata Nandy ,  Chethan Chavadibagilu Radhakrishnabhat ,  Srinidhi Hari Prasad

IPC: H04L12/927 ,  H04L12/813 ,  H04L12/24 ,  H04L12/18

Abstract: Systems are methods are described for predicting and forecasting a resource utilization on network device, particularly for handling multicast flows, by monitoring past resource consumption patterns. A system can include a plurality of multicast clients coupled to a network; and a network device coupled to the network. The network device may be a switch or a router that directs multicast traffic to the plurality of multicast clients. The network device can include a flow prediction controller that determines one or more real-time predictions relating to a demand of the network based on an analysis of an artificial intelligence (AI) forecasting model, such as an Autoregressive Integrated Moving Average (ARIMA) model. Also, the network device can include a resource optimizer that performs a resource management action that optimizes the resources of the network device based on the one or more real-time predictions of the demand of the network and a policy.

公开(公告)号：US11489714B2

公开(公告)日：2022-11-01

申请号：US17221806

申请日：2021-04-04

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Tathagata Nandy ,  Subramanian Muthukumar

IPC: H04L12/00 ,  H04L41/0631 ,  H04L12/18 ,  H04L45/02

Abstract: The present disclosure relates a system and a method of identifying network faults residing in an underlay network. A network device initiating fault analysis sends a query message through a tunnel interface present in an overlay network configured over an underlay network. While an upstream interface is a network tunnel having a first end and a second end, a unicast path from the first end to the second end of the network tunnel is traced using a network route analysis function. Reachability of a destination device present on the second end of the network tunnel is identified. An output of the network route analysis function is appended with an output of a multicast network connectivity determining function to produce an appended result that is shared with the network device initiating fault analysis.

公开(公告)号：US11424961B2

公开(公告)日：2022-08-23

申请号：US16132289

申请日：2018-09-14

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Tathagata Nandy ,  Chethan Chavadibagilu Radhakrishna Bhat

IPC: H04L49/201 ,  H04L12/46 ,  H04L12/18 ,  H04L47/80

Abstract: Methods for directly mapping attributes from controllers connected to a switch are provided. Multicast protocols are combined with policy management and applied to systems with multiple host and source devices. Unnecessary data packets are dropped, while only necessary data packets are forwarded. These methods decrease the amount of resources needed to process requests received during multicasting, provide enhanced security options, and further integrate networking solutions.

公开(公告)号：US20200336361A1

公开(公告)日：2020-10-22

申请号：US16850526

申请日：2020-04-16

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Tathagata Nandy ,  Venkatavaradhan Devarajan ,  Prasad Moola Mangalam ,  Viswanath Reddy Bayapureddy

IPC: H04L12/24 ,  H04L12/18

Abstract: Examples disclosed herein relate to a method comprising determining, at a first node, that a first Ethernet Ring Protection Switching (ERPS) port of the first node is down, wherein the first node belongs to a plurality of network nodes connected in a ring topology to form an access network. The method includes determining, at the first node, that the first ERPS port is a querier port, wherein the first ERPS port is paired with a second ERPS port of the first node and marking the second ERPS port as the querier port of the first node. The method includes transmitting, by the first node, an IGMP join message to a device part of a multicast implementation, wherein the multicast implementation covers at least the ring topology.

公开(公告)号：US20200252287A1

公开(公告)日：2020-08-06

申请号：US16265781

申请日：2019-02-01

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Praveen Kumar Arora ,  Nitin Singla ,  Yashavantha Nagaraju Naguvanahalli ,  Tathagata Nandy

IPC: H04L12/24 ,  H04L29/12

Abstract: A network device may send, to a Dynamic Host Configuration Protocol (DHCP) server, a request for an Internet Protocol version 6 (IPv6) address to be assigned to a management port of the network device, wherein IPv6 is disabled at the network device, and may receive a message that includes information associated with a network management system (NMS) and IPv6 configuration information for enabling IPv6 processing on the management port. In response to receiving the IPv6 configuration information, the network device may enable IPv6 processing on the management port of the network device and may register with the NMS based at least in part on the information associated with the NMS. The network device may, in response to receiving one or more configuration commands sent from the NMS to the management port of the network device, configure the network device according to the one or more configuration commands.

公开(公告)号：US10721159B2

公开(公告)日：2020-07-21

申请号：US15961977

申请日：2018-04-25

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Tathagata Nandy ,  Gopalakrishna Tellapalli

IPC: H04L12/703 ,  H04L12/18 ,  H04L12/931 ,  H04L12/24 ,  H04L12/717

Abstract: Examples include receiving a recovery signal and access data stored in a centralized database of a networking device in response to the recovery signal. The data may include information associated to past multicast flow events. Additionally, examples include determining a rebuilt multicast flow event based on the data, generating a multicast protocol packet based on the multicast flow event, and sending the multicast protocol packet to a multicast protocol in the networking device.

公开(公告)号：US10432535B2

公开(公告)日：2019-10-01

申请号：US15445512

申请日：2017-02-28

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Tathagata Nandy ,  Guru Gurram Janardhan

IPC: H04L12/813 ,  H04L12/26 ,  H04L29/06 ,  H04L29/08 ,  H04L12/931 ,  H04L12/927 ,  H04L12/24

Abstract: In some examples, a method includes identifying, by a network switching device, a network packet received via a particular port as a Message Queuing Telemetry Transport (MQTT) packet, wherein the MQTT packet is transmitted between a broker device and a subscriber device; performing, by the network switching device, a deep packet inspection (DPI) to identify a network address corresponding to the broker device; applying, by the network switching device, a network policy defined in a policy engine that is specific to at least one of the broker device and the subscriber device, wherein the at least one of the broker device and the subscriber device is not statically configured in the policy engine; and performing, by the network switching device, a specific action based on the applied network policy.

公开(公告)号：US20190068387A1

公开(公告)日：2019-02-28

申请号：US16118833

申请日：2018-08-31

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Tathagata Nandy ,  Chethan Chavadibagilu Radhakrishnabhat ,  Balaji Sankaran

IPC: H04L12/18 ,  G06F17/30

CPC classification number: H04L12/18 ,  G06F16/252 ,  G06F16/27 ,  H04L12/1881

Abstract: Examples herein are directed to centralized database based multicast converging. For instance, in various examples centralized database based multicast converging can include starting a restart timer having a value greater than a time to validate stored entries in a centralized database, sending data packets at least to hosts on the network corresponding to the stored entries in the centralized database to maintain service to the hosts while the restart timer is running, sending query packets to validate a host corresponding to an entry of the stored entries in the centralized database, and responsive to the restart timer expiring, sending data packets to a converged group of hosts including at least the validated host.