公开(公告)号：US11855803B2

公开(公告)日：2023-12-26

申请号：US17497209

申请日：2021-10-08

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Vinayak Joshi ,  Venkatavaradhan Devarajan

IPC: H04L12/46 ,  H04L45/74

CPC classification number: H04L12/4633 ,  H04L45/74

Abstract: An apparatus for detecting a loop in a domain comprising a plurality of overlay tunnel fabrics is provided. The apparatus can include an indicator logic block that can insert a predetermined value, which can be unique for the apparatus in the domain, into an egress tunnel header of a packet of a data flow. The header's destination address can correspond to a remote apparatus of an overlay tunnel fabric that includes the apparatus. Tunnel encapsulation can be initiated and terminated within the corresponding overlay tunnel fabric. The indicator logic block can determine, for a respective packet of the data flow from a remote overlay tunnel fabric of the domain, whether the predetermined value is present in an ingress tunnel header. Upon identifying the predetermining value in the ingress tunnel header, a loop logic block of the apparatus can determine that a loop is present in the domain.

公开(公告)号：US11805183B2

公开(公告)日：2023-10-31

申请号：US17482152

申请日：2021-09-22

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Chivukula Koundinya ,  Balaji Sankaran ,  Venkatavaradhan Devarajan ,  Sivakumar Murugan

IPC: H04L29/08 ,  H04L12/775 ,  H04L67/51 ,  H04L45/58

CPC classification number: H04L67/51 ,  H04L45/583

Abstract: A member switch of multiple connected switches receives a stack-discovery packet from a first coupled switch and, in response, generates and transmits a stack-discovery-response packet to the first coupled switch to allow the member switch to be discovered. The member switch receives stack-configuration information from a stack-control node and forwards the stack-discovery packet to a second coupled switch to facilitate discovery of the second coupled switch. The first coupled switch, the member switch, and the second coupled switch are coupled to each other according to a predetermined order, thereby facilitating an ordered discovery of the multiple connected switches. In response to receiving, from the stack-control node, a control packet, the member switch reboots based on the received stack-configuration information. The stack-configuration information comprises a stack-member identifier allocated, based on the predetermined order, by the stack-control mode to the member switch, thereby facilitating formation of an ordered stack.

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：US20220400075A1

公开(公告)日：2022-12-15

申请号：US17391836

申请日：2021-08-02

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Saumya Dikshit ,  Vinayak Joshi ,  Venkatavaradhan Devarajan

IPC: H04L12/703 ,  H04L12/709 ,  H04L12/741 ,  H04L12/24 ,  H04L29/12 ,  H04L12/46

Abstract: In an example, a failure event is detected in a network, where the failure event is indicative of a network outage in a network device or a peer network device of an MC-LAG. The network device and the peer network device may be configured as a first VTEP in an overlay network. It may be determined that reprovisioning of virtual tunnels in the network device is incomplete. State parameters between the network device and the peer network device is synchronized. The set of virtual tunnels in the network device is provisioned based on the state parameters. After completion of provisioning of the virtual tunnels, an IP address of the first VTEP is published to underlay network devices connecting the first VTEP to a second VTEP over an underlay network. Subsequently, communication links between the MC-LAG and a host device is enabled.

公开(公告)号：US20210109744A1

公开(公告)日：2021-04-15

申请号：US17034651

申请日：2020-09-28

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Mamata Hegde ,  Venkatavaradhan Devarajan ,  Jagmeet Singh Hanspal

IPC: G06F8/656 ,  H04L12/707 ,  G06F16/22 ,  G06F16/23 ,  G06F9/4401

Abstract: Examples disclosed herein relate to performing a software update on a network device forming a MC-LAG. In an example, a software update onto a first network device and a second network device may be downloaded. The first network device and the second network device may form a MC-LAG that may provide a redundant connectivity to a network device in a network. A shutdown of routing protocols on the first network device may be performed. Each of the routing protocols may advertise a maximum metric on the first network device, leading to a recalculation of network routes by the network device. The first network device may be updated with the software update. Until the software update on the first network device is complete, network traffic on the network may be routed through the second network device.

公开(公告)号：US10855583B2

公开(公告)日：2020-12-01

申请号：US16201319

申请日：2018-11-27

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Anil Raj ,  Anoop Govindan Nair ,  Venkatavaradhan Devarajan

IPC: H04W56/00 ,  H04L12/713 ,  H04L12/709 ,  H04L12/721 ,  H04L12/733

Abstract: Examples disclosed herein relate to a method comprising receiving, at a first switch, a bidirectional forwarding detection packet, wherein the first switch and a second switch are part of a virtualized switch and each switch in the virtualized switch has a same Media Access Control (MAC) address, determining, at the first switch, that a destination MAC address included in the bidirectional forwarding detection packet is not owned by the first switch, determining, at the first switch, that the destination MAC address is owned by the second switch and bridging, from the first switch, the bidirectional forwarding detection packet to the second switch that owns the MAC address.

公开(公告)号：US20200344160A1

公开(公告)日：2020-10-29

申请号：US16807598

申请日：2020-03-03

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Anoop Govindan Nair ,  Vijeesh Erankotte Panayamthatta ,  Venkatavaradhan Devarajan

IPC: H04L12/723 ,  H04L12/709 ,  H04L12/24 ,  H04L12/707 ,  H04L12/931 ,  H04L12/741

Abstract: Examples disclosed herein relate to a method comprising receiving, at a first label manager of a first network device, a first request to allocate a first label for a first route prefix for a first protocol, wherein the first network device and a second network device are part of a virtualized network device. The method includes receiving, at a second label manager of the second network device, a second request to determine the first label for the first route prefix for the first protocol, wherein the second request originates from the first label manager and determining, at the second label manager, the first label for the first route prefix for the first protocol. The method includes transmitting, the first label to the first label manager and transmitting, by the first label manager, the first label to a label management protocol corresponding to the first protocol, in response to the first request.

公开(公告)号：US20200177438A1

公开(公告)日：2020-06-04

申请号：US16690290

申请日：2019-11-21

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Tathagata Nandy ,  Venkatavaradhan Devarajan ,  Guru Gurram Janardhan

IPC: H04L12/24 ,  H04L12/18

Abstract: Systems and methods are provided for performing a node-level redundant failover-type process with respect to the protocol-independent multicast (PIM) functionality in a multi-chassis environment. When a PIM-related failure occurs on a first network device, but otherwise it remains operational, a second network device is configured to assume responsibility for performing PIM data traffic forwarding. Upon detecting the PIM-related failure of the first network device, the second network device sends a PIM-DR failover event signal to the second network device's PIM module by loading multicast route states used by the first network device into the PIM data traffic forwarding hardware of the second network device. Upon the second network device assuming responsibility, the first network device disables its PIM data traffic forwarding functionality.

公开(公告)号：US20200099608A1

公开(公告)日：2020-03-26

申请号：US16536028

申请日：2019-08-08

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Anil Raj ,  Anoop Govindan Nair ,  Venkatavaradhan Devarajan

IPC: H04L12/733 ,  H04L12/721 ,  H04L12/755

Abstract: Examples include determining a first hop for a preferred route from a networking device to a destination device, calculating a cumulative cost for the preferred route based on a cost of the first hop and an original cost of the preferred route, determining whether a secondary route is available, and, in response to a determination that the secondary route is available, determining a first hop in the secondary route. Examples also include determining a cost of the first hop in the secondary route, determining a new route from the networking device to the destination computing device based on the cumulative cost of the preferred route and the cost of the first hop in the secondary route, and entering the new route into a forwarding data structure of the networking device.

公开(公告)号：US10541904B2

公开(公告)日：2020-01-21

申请号：US15659908

申请日：2017-07-26

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Venkatavaradhan Devarajan ,  Chivukula Koundinya ,  Gopinatha Rao P

IPC: H04L12/26 ,  H04L12/24 ,  H04L12/703 ,  H04L12/741 ,  H04L29/08

Abstract: Examples relate to establishing a network fault detection session. In one example, a routing device may receive a request to initiate a bidirectional forwarding detection (BFD) session with a second routing device; transmit a first echo frame to the second routing device; receive a first response frame; determine that a response time does not meet a response time threshold; in response to the determination, determine that a BFD failure threshold has not been met; after the determination that the BFD failure threshold has not been met, transmit a second echo frame to the second routing device; receive a second response frame; determine whether a second response time meets the BFD response time threshold; and in response to determining that the second response time meets the BFD response time threshold, provide a notification that a BFD session has been established between the routing device and the second routing device.