公开(公告)号：US20190215264A1

公开(公告)日：2019-07-11

申请号：US15866824

申请日：2018-01-10

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Tathagata Nandy ,  Nilay Tripathi ,  Sarita Patra

IPC: H04L12/753 ,  H04L12/773 ,  H04L12/24 ,  H04L12/18 ,  H04L12/66 ,  H04L12/761 ,  H04L12/775 ,  H04L12/751

Abstract: In example implementations, a method is provided. The method detects, by a processor, an assignment of a master router role for a virtual router redundancy protocol (VRRP), a protocol independent multicast (PIM) designated router (DR) role for a PIM protocol, and a querier router role for an internet group management protocol (IGMP) to different routers in a network. A communication procedure is initiated to identify which routers of the routers are assigned to the master router role, the DR role and the querier router role. The master router role, the DR role and the querier router role are then automatically aligned to a single router of the routers via an ordered communication exchange.

公开(公告)号：US20180248804A1

公开(公告)日：2018-08-30

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 ,  H04L12/927 ,  H04L29/08

CPC classification number: H04L47/20 ,  H04L41/0893 ,  H04L43/08 ,  H04L43/10 ,  H04L47/805 ,  H04L49/35 ,  H04L67/1002 ,  H04L67/14 ,  H04L67/28 ,  H04L67/2809 ,  H04L67/2819 ,  H04L67/2842 ,  H04L67/42 ,  H04L69/22

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：US20250133009A1

公开(公告)日：2025-04-24

申请号：US18489486

申请日：2023-10-18

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Tathagata Nandy ,  Subramanian Muthukumar

IPC: H04L45/00 ,  H04L12/18 ,  H04L12/46 ,  H04L45/24

Abstract: A first network device in a network is provided. During operation, the first network device can elect the first network device as a designated forwarder (DF) of multicast traffic in a subnet for a Rendezvous Point (RP) of a multicast group. Here, the first network device can operate in conjunction with a second network device as a virtual gateway device of the subnet. The second network device can be elected as another DF for the RP. The first network device can determine whether the first network device is elected as a forwarding device based on a selection parameter. Upon determining that the first network device is elected as the forwarding device, the first network device can program, in the forwarding hardware, a forwarding entry for forwarding the multicast traffic. The first network device can then forward multicast traffic associated with the multicast group based on the forwarding entry.

公开(公告)号：US20250039080A1

公开(公告)日：2025-01-30

申请号：US18358672

申请日：2023-07-25

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Tathagata Nandy ,  Anil Raj ,  Priyam De

IPC: H04L45/16

Abstract: One aspect can provide a system and method for tunnel-based multicasting. During operation, a source-side designated router (DR) coupled to a source device of a multicast group can broadcast a service-advertisement packet and receive a response packet from a client-side DR coupled to one or more client devices within the multicast group. The source-side DR can determine an address of the client-side DR based on the received response packet and establish a hardware-based communication tunnel between the source-side DR and the client-side DR using the address of the client-side DR. Establishing the hardware-based communication tunnel can include using hardware logic units to encapsulate multicast data packets originating from the source device. The source-side DR can further send, over the hardware-based communication tunnel, multicast data packets originating from the source device to the client-side DR, which forwards the multicast data packets to the client devices within the multicast group.

公开(公告)号：US20240364618A1

公开(公告)日：2024-10-31

申请号：US18141035

申请日：2023-04-28

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Tathagata Nandy ,  Thomas Samuel

IPC: H04L45/16 ,  H04L45/64 ,  H04L45/74

CPC classification number: H04L45/16 ,  H04L45/64 ,  H04L45/74

Abstract: A system for efficient multicast forwarding at a switch is provided. During operation, the switch can maintain a first tunnel with a first switch in a first overlay tunnel fabric, and a second tunnel with a second switch in a second overlay tunnel fabric. The switch can operate as the gateway for both fabrics. The system can obtain a first fabric identifier and a second fabric identifier from multicast control packets received via the first and second tunnels, respectively. A fabric identifier can uniquely identify a fabric. The system can then store, in a data structure, a first network address of the first switch and a second network address of the second switch in association with the first and second fabric identifiers, respectively. The system can determine whether to forward multicast traffic to either one of the first and second fabrics based on the first and second fabric identifiers, respectively.

公开(公告)号：US20230126874A1

公开(公告)日：2023-04-27

申请号：US17507474

申请日：2021-10-21

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Tathagata Nandy ,  Chethan Chavadibagilu Radhakrishnabhat ,  Priyam De

IPC: H04N21/238 ,  H04N21/25

Abstract: One aspect of the instant application facilitates reduction of multicast group join latency. During operation, the system can receive, at a network device, a first multicast group leave packet corresponding to a first multicast group. In response to receiving a first multicast group leave packet from an IPTV client, the system can simulate a second multicast group join on behalf of the IPTV client by updating, based on a predictive model, at least an entry in a table maintained in hardware with a next likely multicast group that the IPTV client is likely to join; and sending a simulated second multicast group join packet for initiating an IPTV stream associated with the next likely multicast group. In response to receiving an actual second multicast group join packet from the IPTV client, the system can facilitate the IPTV stream to the IPTV client, thereby reducing multicast group join latency.

公开(公告)号：US20230099633A1

公开(公告)日：2023-03-30

申请号：US17491326

申请日：2021-09-30

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Tathagata Nandy ,  Subramanian Muthukumar ,  Chethan Chavadibagilu Radhakrishnabhat

IPC: H04L12/18 ,  H04L12/715 ,  H04L12/46 ,  H04L12/66

Abstract: A system for multicast traffic management in an overlay tunnel fabric is provided. The system can operate a first switch and a second switch of the fabric as part of a virtual switch. The virtual switch can operate as a gateway for the fabric. The system can efficiently deploy a rendezvous point (RP) for a multicast group at the first switch. During operation, the system can determine whether to synchronize a registration packet associated with the multicast group with the second switch based on a type of a first ingress connection associated with the registration packet. The system can then determine whether to receive subsequent registration packets for the multicast group based on the type of the first ingress connection and reception of a join request for the multicast group. The type of a respective connection indicates whether the connection includes an overlay tunnel.

公开(公告)号：US20230024996A1

公开(公告)日：2023-01-26

申请号：US17374422

申请日：2021-07-13

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Vinayak Joshi ,  Tathagata Nandy ,  Venkatavaradhan Devarajan ,  Saumya Dikshit

IPC: H04W4/08 ,  H04W36/18 ,  H04L12/721 ,  H04L12/761

Abstract: In an example, a wired network device receives a first join message originating from a client device associated with a first wireless access point (WAP) connected to another wired network device in a broadcast domain. An entry corresponding to the client device is created in a remote receiver record of the wired network device. In response to the client device transitioning from the first WAP to a second WAP connected to the wired network device, it is determined that the client device is locally connected to the wired network device. Intention of the client device to receive multicast traffic is identified. A second join message directed to the network address of the multicast group and distributed in the broadcast domain. A traffic flow path for the multicast traffic via the wired network device and the second WAP to the client device is configured.

公开(公告)号：US11528192B2

公开(公告)日：2022-12-13

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: H04L41/08 ,  H04L41/0806 ,  H04L61/5014 ,  H04L101/659

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：US10958554B2

公开(公告)日：2021-03-23

申请号：US16108836

申请日：2018-08-22

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Tathagata Nandy ,  Rajib Majila

IPC: H04L12/26 ,  H04L12/751 ,  H04L29/12

Abstract: Examples disclosed herein relate to monitoring flow activity on a network device. In an example, a neighbor table is maintained on a network device. The neighbor table may include a record of a neighbor network device and a hit bit corresponding to the neighbor network device. The hit bit may be used to represent a flow activity of the neighbor network device. A determination may be made whether a status of the hit bit corresponding to the neighbor network device is inactive. If the status of the hit bit is inactive, a flow entry corresponding to the neighbor network device may be deleted from an ASIC table on the network device.