公开(公告)号：US11368394B2

公开(公告)日：2022-06-21

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: H04L45/50 ,  H04L45/24 ,  H04L45/74 ,  H04L49/00 ,  H04L41/0668 ,  H04L45/00

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：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：US20220200880A1

公开(公告)日：2022-06-23

申请号：US17130483

申请日：2020-12-22

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Ankit Kumar Sinha ,  Anoop Govindan Nair ,  Parikshit Misra

IPC: H04L12/26 ,  H04L12/723

Abstract: A switch that can report unavailability in a label-switched network is provided. During operation, the switch can determine that a label-switched path is unavailable for forwarding a packet. The switch can then generate a notification message for collecting unavailability information at a respective upstream hop of the label-switched path. The notification message includes a depth indicator indicating the depth of collected unavailability information and an ingress label of the packet at the switch. If the switch is an intermediate switch on the label-switched path, the switch can forward the notification message to an upstream switch on the label-switched path, thereby allowing the upstream switch to collect further unavailability information in the notification message.

公开(公告)号：US20200036617A1

公开(公告)日：2020-01-30

申请号：US16049698

申请日：2018-07-30

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Anil Raj ,  Anoop Govindan Nair ,  Srijith Ponnappan

IPC: H04L12/26 ,  H04L29/06 ,  H04L12/701 ,  H04L12/24

Abstract: Examples disclosed herein relate to black hole filtering. In an example, a dynamic routing protocol on a network device may determine whether a route learned by the dynamic routing protocol is a black hole route. In an example, the route may be learned through another source. In response to a determination that the route learned by the dynamic routing protocol is the black hole route, the dynamic routing protocol may generate a routing update that indicates the route as the black hole route. The dynamic routing protocol may then advertise the routing update to each neighbor network device.

公开(公告)号：US20190334811A1

公开(公告)日：2019-10-31

申请号：US15962086

申请日：2018-04-25

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Anil Raj ,  Anoop Govindan Nair ,  Celestian K. Sebastian

IPC: H04L12/725 ,  H04L12/751 ,  H04L12/721 ,  H04L12/707 ,  H04L12/703

Abstract: In some examples, a first router includes a communication interface to communicate over a network, and a processor to participate in an election process to determine, based on respective priorities assigned to a plurality of routers including the first router, which of the plurality of routers is an elected router responsible for distributing routing information to another router, and in response to the first router being selected as the elected router in the election process, adjust a priority of the first router for a subsequent election process.

公开(公告)号：US20240333580A1

公开(公告)日：2024-10-03

申请号：US18329689

申请日：2023-06-06

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Anoop Govindan Nair ,  Venkatesh Natarajan ,  Vincent Giles ,  Saurabh Mohan ,  Nisarg Shah

IPC: H04L41/0654

CPC classification number: H04L41/0654

Abstract: Methods and systems configured for fast failover in ISP peering are disclosed herein. One method comprises: establishing a fault detection protocol session between a first router and a second router, the first and second routers being computing network peers; the first router responding to a data communication connection between the first router and a first provider edge router going down by altering a status of the fault detection protocol session to a changed status; and the second router responding to the changed status of the fault detection protocol session by rerouting traffic served by the first provider edge router to a second provider edge router.

公开(公告)号：US11632316B2

公开(公告)日：2023-04-18

申请号：US17130483

申请日：2020-12-22

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Ankit Kumar Sinha ,  Anoop Govindan Nair ,  Parikshit Misra

IPC: H04L43/0805 ,  H04L45/50 ,  H04L41/0686 ,  H04L41/40 ,  H04L43/06 ,  H04L43/10

Abstract: A switch that can report unavailability in a label-switched network is provided. During operation, the switch can determine that a label-switched path is unavailable for forwarding a packet. The switch can then generate a notification message for collecting unavailability information at a respective upstream hop of the label-switched path. The notification message includes a depth indicator indicating the depth of collected unavailability information and an ingress label of the packet at the switch. If the switch is an intermediate switch on the label-switched path, the switch can forward the notification message to an upstream switch on the label-switched path, thereby allowing the upstream switch to collect further unavailability information in the notification message.

公开(公告)号：US10735252B2

公开(公告)日：2020-08-04

申请号：US16047341

申请日：2018-07-27

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Anil Raj ,  Anoop Govindan Nair ,  Srijith Ponnappan

IPC: H04L12/24 ,  H04L12/721 ,  H04L12/741

Abstract: In some examples, a first router establishes a fault detection session between the first router connected to a routing area and an outside router assigned a forwarding address, the outside router located outside the routing area, and the forwarding address used by a second router of the routing area to send a data packet to the outside router. The first router detects, in the fault detection session, a fault associated with the outside router, and in response to detecting the fault associated with the outside router in the fault detection session, provides an indication to the routing area that the forwarding address is no longer accessible.

公开(公告)号：US11425016B2

公开(公告)日：2022-08-23

申请号：US16049698

申请日：2018-07-30

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Anil Raj ,  Anoop Govindan Nair ,  Srijith Ponnappan

IPC: H04L43/10 ,  H04L41/06 ,  H04L45/00 ,  H04L9/40

Abstract: A system related to black hole filtering is provided. The system can allow a dynamic routing protocol on a network device to determine whether a route learned by the dynamic routing protocol is a black hole route. The route may be learned through another source. In response to a determination that the route is the black hole route, the dynamic routing protocol may generate a routing update that indicates the route as the black hole route. The dynamic routing protocol may then advertise the routing update to each neighbor network device.

公开(公告)号：US10924396B2

公开(公告)日：2021-02-16

申请号：US16276853

申请日：2019-02-15

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Anoop Govindan Nair ,  Anil Raj ,  Venkatavaradhan Devarajan

IPC: H04L12/713 ,  H04L12/46 ,  H04L12/66 ,  H04L1/22 ,  H04L29/14

Abstract: A method for use in a network, including: receiving network traffic at a redundant gateway device established according to a redundant gateway protocol; forwarding known unicast traffic received at the redundant gateway device from the redundant gateway device to a tunnel endpoint through a tunnel established according to a tunneling protocol; forwarding broadcast, unknown unicast, and multicast traffic to the tunnel endpoint through the tunnel if the redundant gateway device is a master gateway under the redundant gateway protocol; and dropping the broadcast, unknown unicast, and multicast traffic if the redundant gateway device is a backup gateway under the redundant gateway protocol.