公开(公告)号：US20220224636A1

公开(公告)日：2022-07-14

申请号：US17148272

申请日：2021-01-13

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Saumya Dikshit ,  Anil Raj

IPC: H04L12/709 ,  H04L12/713 ,  H04L12/721 ,  H04L12/751

Abstract: One embodiment can provide a method and system for synchronizing MTU in a WAN edge with router redundancy. During operation, the system may determine a set of interfaces associated with a network device among a plurality of network devices coupled via inter-switch links. The system can determine a set of layer-3 MTU values corresponding to the set of network interfaces and can determine a highest layer-3 MTU value based on the set of determined layer-3 MTU values. The system can synchronize, via the inter-switch links, the highest layer-3 MTU value, resulting in a set of highest layer-3 MTU values at the network device. The system can determine, based on the set of highest layer-3 MTU values, a global highest layer-3 MTU value. The system can derive a layer-2 MTU value based on the global highest layer-3 MTU value and can configure a respective inter-switch link with the layer-2 MTU value.

公开(公告)号：US20200007437A1

公开(公告)日：2020-01-02

申请号：US16129207

申请日：2018-09-12

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： A. Keshava ,  Anil Raj

IPC: H04L12/703 ,  H04L12/707 ,  H04L12/751 ,  H04L12/721 ,  H04L12/24 ,  H04L29/08

Abstract: A method for use in exiting a portion of a node from an Internet Protocol, Layer 3 network includes: preparing the network for the portion to exit prior to the exit, including: notifying a set of peer nodes of the portion's exit; and rerouting traffic in the network away from the portion to the set of peer nodes; exiting the portion from the network once the traffic is rerouted; and reintroducing the exited portion to the network, including: notifying the peer nodes of the portion's reintroduction; and rerouting at least some of the traffic through the re-introduced portion.

公开(公告)号：US20190342258A1

公开(公告)日：2019-11-07

申请号：US15967851

申请日：2018-05-01

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Anil Raj ,  Prasanth Gopinathan Nair Saraswathy Amma ,  Venkatavaradhan Devarajan

IPC: H04L29/12 ,  H04L29/08 ,  H04L12/741 ,  H04L12/801

Abstract: In some examples, a switch includes a first communication interface to communicate with a first device, a second communication interface to communicate with a proxy device enabled to perform proxy address resolution, and a processor to receive a first data packet from the first device targeted to a first layer 3 network address, send, to the proxy device, an address resolution request to obtain a layer 2 network address corresponding to the first layer 3 network address, and responsive to receiving a response to the address resolution request, update a forwarding information structure to refer to a layer 3 network address of the proxy device, the forwarding information structure useable to forward a second data packet to the proxy device for transmission of the second data packet to a destination device.

公开(公告)号：US20190334813A1

公开(公告)日：2019-10-31

申请号：US15965558

申请日：2018-04-27

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Anil Raj ,  Keshava Ayanur

IPC: H04L12/753 ,  H04L12/715 ,  H04L12/755 ,  H04L12/46

Abstract: Some examples relate to determining routing decisions in a SD-WAN overlay. In an example, a controller in a SD-WAN overlay comprising a plurality of network nodes may receive respective routing and link information from a respective routing agent present on each network node of the plurality of network nodes. The controller may generate a Prefix tree based on the respective routing and link information received from the respective routing agent. The prefix tree may store prefixes along with respective prefix information. The controller may determine, for each prefix in the Prefix tree, a respective routing decision for each network node in the plurality of network nodes. The controller may distribute the respective routing decision to each network node in the plurality of network nodes in the SD-WAN overlay.

公开(公告)号：US10462064B2

公开(公告)日：2019-10-29

申请号：US15513204

申请日：2014-11-05

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Anil Raj ,  Celestian K. Sebastian

IPC: H04L12/805 ,  H04L12/64

Abstract: In some examples, a maximum transmission unit (MTU) is installed by a Software-Defined Network (SDN) controller on a controlled network node for traffic along a datapath in an SDN. The installed MTU can, for example, be selected from MTU sizes in an MTU database for nodes along the datapath. For example, the installed MTU can be selected as the largest allowable MTU size based on the nodes of the datapath.

公开(公告)号：US20190097926A1

公开(公告)日：2019-03-28

申请号：US15717000

申请日：2017-09-27

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Anil Raj ,  Anoop Govindan Nair ,  Venkatavaradhan Devarajan

IPC: H04L12/775 ,  H04L29/14 ,  H04L12/703

Abstract: Examples disclosed herein relate to a grace link state advertisement (LSA) from a virtual stack device. In an example, a first member network device of a virtual stack device may an input from a Multi-Active Detection (MAD) device. The virtual stack device may be a logical network device comprising the first member network device and a second member network device. Based on the input from the MAD device, the first member network device may determine whether a grace link state advertisement (LSA) is to be sent to a neighbor Open Shortest Path First (OSPF) enabled router by the first member network device, wherein the neighbor OSPF enabled router is an OSPF neighbor to the virtual stack device.

公开(公告)号：US20170302584A1

公开(公告)日：2017-10-19

申请号：US15513204

申请日：2014-11-05

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Anil Raj ,  Celestian K. SEBASTIAN

IPC: H04L12/805 ,  H04L12/64

CPC classification number: H04L47/36 ,  H04L12/6418 ,  H04L2012/6443

Abstract: In some examples, a maximum transmission unit (MTU) is installed by a Software-Defined Network (SDN) controller on a controlled network node for traffic along a datapath in an SDN. The installed MTU can, for example, be selected from MTU sizes in an MTU database for nodes along the datapath. For example, the installed MTU can be selected as the largest allowable MTU size based on the nodes of the datapath.

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：US11374856B1

公开(公告)日：2022-06-28

申请号：US17148272

申请日：2021-01-13

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Saumya Dikshit ,  Anil Raj

IPC: H04L45/24 ,  H04L45/586 ,  H04L45/02 ,  H04L45/00 ,  H04L45/44

Abstract: One embodiment can provide a method and system for synchronizing MTU in a WAN edge with router redundancy. During operation, the system may determine a set of interfaces associated with a network device among a plurality of network devices coupled via inter-switch links. The system can determine a set of layer-3 MTU values corresponding to the set of network interfaces and can determine a highest layer-3 MTU value based on the set of determined layer-3 MTU values. The system can synchronize, via the inter-switch links, the highest layer-3 MTU value, resulting in a set of highest layer-3 MTU values at the network device. The system can determine, based on the set of highest layer-3 MTU values, a global highest layer-3 MTU value. The system can derive a layer-2 MTU value based on the global highest layer-3 MTU value and can configure a respective inter-switch link with the layer-2 MTU value.

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.