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    PREVENTING HIGH AVAILABILITY PAIRS OF NETWORK DEVICES FROM SENDING OUT DUPLICATE MULTICAST TRAFFIC FLOWS
    1.
    发明申请
    PREVENTING HIGH AVAILABILITY PAIRS OF NETWORK DEVICES FROM SENDING OUT DUPLICATE MULTICAST TRAFFIC FLOWS 有权

    公开(公告)号：US20250007742A1

    公开(公告)日：2025-01-02

    申请号：US18345382

    申请日：2023-06-30

    Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

    Inventor： Anil Raj ,  Tathagata Nandy ,  Subramanian Muthukumar ,  Srijith Ponnappan

    IPC: H04L12/18

    Abstract: A process includes receiving, at a downstream interface of a high availability pair of network devices, a join request. The availability pair of network devices includes a first network device and a second network device. The join request represents a request by a client device to join a multicast group associated with a source address and a multicast group address. The process includes, responsive to the join request, exporting, by the first network device, first static multicast route information from a second interface of the first network device. The first static multicast route information corresponds to a routing of multicast traffic associated with the multicast group through the first network device. The process further includes, responsive to the join message, controlling, by the second network device, exporting of second static multicast route information from the second network device to prevent duplicate multicast traffic associated with the multicast group from being sent by the high availability pair. The second static multicast route information corresponds to a routing of the multicast traffic associated with the multicast group through the second network device.

    MULTICAST RENDEZVOUS POINT DEPLOYMENT IN A VIRTUAL GATEWAY OF A DISTRIBUTED TUNNEL FABRIC
    2.
    发明申请
    MULTICAST RENDEZVOUS POINT DEPLOYMENT IN A VIRTUAL GATEWAY OF A DISTRIBUTED TUNNEL FABRIC 有权

    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.

    Multicast datapath tracing in layer-2 networks
    3.
    发明授权
    Multicast datapath tracing in layer-2 networks 有权

    公开(公告)号：US12132643B1

    公开(公告)日：2024-10-29

    申请号：US18211467

    申请日：2023-06-19

    Applicant: Hewlett Packard Enterprise Development LP

    Inventor： Tathagata Nandy ,  Subramanian Muthukumar

    IPC: G06F15/16 ,  H04L45/00 ,  H04L45/16 ,  H04L45/42

    CPC classification number: H04L45/16 ,  H04L45/42 ,  H04L45/566

    Abstract: During operation, a layer-3 (L3) router can receive a trace query to trace multicast paths associated with a multicast group. In response to detecting a layer-2 (L2) switch coupled to the L3 router, the L3 router can construct a request packet and send the request packet to the coupled L2 switch. The request packet comprises a first data block indicating that the request packet is an L2 multicast trace request, thereby causing the L2 switch to propagate the request packet to downstream L2 switches until the request packet reaches a last-hop L2 switch. The L3 router can receive, from the last-hop L2 switch, a reply packet responsive to the L2 multicast trace request, the reply packet comprising one or more data blocks, with each data block comprising information about an L2 switch or client device present on a traversed multicast path for the multicast group.

    METHOD AND SYSTEM FOR PERFORMING NETWORK FAULT ANALYSIS
    7.
    发明申请
    METHOD AND SYSTEM FOR PERFORMING NETWORK FAULT ANALYSIS 有权

    公开(公告)号：US20210320837A1

    公开(公告)日：2021-10-14

    申请号：US17221806

    申请日：2021-04-04

    Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

    Inventor： Tathagata Nandy ,  Subramanian Muthukumar

    IPC: H04L12/24 ,  H04L12/751 ,  H04L12/18

    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.

    OPTIMIZATION OF LINK BANDWIDTH CONSUMPTION IN A LAYER-2 MULTICAST NETWORK
    8.
    发明申请
    OPTIMIZATION OF LINK BANDWIDTH CONSUMPTION IN A LAYER-2 MULTICAST NETWORK 有权

    公开(公告)号：US20250106062A1

    公开(公告)日：2025-03-27

    申请号：US18473938

    申请日：2023-09-25

    Applicant: Hewlett Packard Enterprise Development LP

    Inventor： Tathagata Nandy ,  Subramanian Muthukumar ,  Priyam De

    IPC: H04L12/18

    Abstract: One aspect can provide a system and method for selective data forwarding in a multicast network. During operation, a querier router in the multicast network receives, at a first port of, a query-response packet from a network device in response to an all-host query sent by the querier router and add the first port to a port list comprising a number of ports coupled to non-querier devices in the multicast network. In response to receiving a multicast-join message, the querier router can forward the multicast-join message to the ports on the port list comprising the first port except for a port that receives the multicast-join message. Forwarding the multicast-join message to the first port causes the multicast-join message to be received at a second port of a layer-2 switch, which allows the layer-2 switch to forward unknown multicast data packets to the querier device via the second port.

    EFFICIENT PROGRAMMING OF MULTICAST ROUTES IN FORWARDING HARDWARE
    9.
    发明公开
    EFFICIENT PROGRAMMING OF MULTICAST ROUTES IN FORWARDING HARDWARE 审中-公开

    公开(公告)号：US20240305494A1

    公开(公告)日：2024-09-12

    申请号：US18117868

    申请日：2023-03-06

    Applicant: Hewlett Packard Enterprise Development LP

    Inventor： Tathagata Nandy ,  Anil Raj ,  Subramanian Muthukumar

    IPC: H04L12/18 ,  H04L49/90

    CPC classification number: H04L12/185 ,  H04L49/90

    Abstract: A system for facilitating efficient multicast programming in a switch is provided. During operation, the system can parse a multicast data structure that can map an ingress interface, a source, and a multicast group to a set of egress interfaces. Based on the data structure, the system can generate a cache that can map an egress interface to an ingress interface indicated in the data structure. Upon receiving a join request via a first interface, the system can look up the first interface in the cache. If the first interface matches a cache entry, the system can identify an ingress interface from the cache entry. The system can then program, in the data structure, a route entry with the first interface as an egress interface and the ingress interface. Subsequently, if a multicast data packet matches the route entry, the system can forward the packet via the first interface.

    Method and system for performing network fault analysis
    10.
    发明授权
    Method and system for performing network fault analysis 有权

    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.

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