公开(公告)号：US20220385620A1

公开(公告)日：2022-12-01

申请号：US17334005

申请日：2021-05-28

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Ankit Kumar Sinha ,  Saumya Dikshit ,  Vinayak Joshi ,  Venkatesh Natarajan

IPC: H04L29/12 ,  H04L12/46 ,  H04L12/66 ,  H04L12/715

Abstract: One aspect provides a method and system for managing address resolution requests in a network. During operation, a gateway of the network advertises a route for sending address resolution requests and determines whether a cached entry corresponding to an address resolution request received via the route exists in a neighbor table. In response to determining that the cached entry exists, the gateway responds to the address resolution request based on the cached entry; in response to determining that the cached entry does not exist, the gateway replicates the address resolution request to edge devices in the network, thereby facilitating discovery of a target host corresponding to the address resolution request.

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：US20240406102A1

公开(公告)日：2024-12-05

申请号：US18204196

申请日：2023-05-31

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Saumya Dikshit ,  Thomas Samuel

IPC: H04L45/64 ,  H04L45/02 ,  H04L45/16

Abstract: A system for efficient traffic management is provided. During operation, the system can receive a first route update via a first tunnel coupling a first switch in a first overlay tunnel fabric of a network site. The first route update can include a first set of hierarchical identifiers associated with the first switch. Here, a respective identifier can correspond to a distinct networking hierarchy with respect to the first switch. The system can also receive a second route update via a second tunnel coupling a second switch in a second overlay tunnel fabric of the site. The second route update can include a second set of hierarchical identifiers associated with the second switch. Upon receiving a packet via a tunnel, the system can determine whether to forward the packet to the first switch and the second switch based on the first and second sets of hierarchical identifiers, respectively.

公开(公告)号：US12132588B2

公开(公告)日：2024-10-29

申请号：US17813103

申请日：2022-07-18

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Saumya Dikshit ,  Rajeev Jain

IPC: H04L12/46 ,  H04L12/42 ,  H04L45/02 ,  H04L45/645

CPC classification number: H04L12/4641 ,  H04L12/42 ,  H04L45/04 ,  H04L45/645

Abstract: In an example, a network switch is to receive a loop detect packet from an access netwssork connected to a Data center network (DCN). The DCN includes a VXLAN overlay and the network switch is configured as a VTEP. The network switch compares the VNI of a source VTEP from which the loop detect packet originates with a locally configured VNI. In response to a match, it is determined that the network switch is configured as a peer VTEP. Import RT in the loop detect packet is compared with an export RT of the peer VTEP and the export RT in the loop detect packet is compared with an import RT of the peer VTEP. Based on the comparison, it is determined whether a VXLAN tunnel is configured between the peer and the source VTEPs. In response to the VXLAN tunnel being configured, the switch may determine that a network loop is present.

公开(公告)号：US11743693B2

公开(公告)日：2023-08-29

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 ,  H04L45/00 ,  H04L45/16 ,  H04L12/18 ,  H04W84/12 ,  H04W88/08

CPC classification number: H04W4/08 ,  H04L45/16 ,  H04L45/66 ,  H04W36/18 ,  H04L12/189 ,  H04W84/12 ,  H04W88/08

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：US11570077B2

公开(公告)日：2023-01-31

申请号：US17221813

申请日：2021-04-04

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Saumya Dikshit ,  Vinayak Joshi

IPC: H04L43/0882 ,  H04L43/0823 ,  H04L43/0817 ,  H04L12/46 ,  H04L45/00 ,  H04L45/24 ,  H04L45/28

Abstract: An example network orchestrator of a SDN is configured to receive, based on a user input, credentials associated with a traffic flow. Based on the credentials, it is determined whether the traffic flow is received at an ingress overlay network node. Route information and encapsulation information of the traffic flow is extracted from the ingress overlay network node. A first set of underlay network nodes each of which is a potential next hop for the traffic flow is identified. It is determined, based on the encapsulation information, whether the traffic flow is received by one of the first set of underlay network nodes. It is determined whether the traffic flow is received at an egress overlay network node from one of the first. A network trace of the traffic flow is determined based on the determinations of whether the traffic flow is received at the ingress overlay network node, one of the first set of underlay network nodes, and the egress overlay network node. Based on the network trace, a fault in a link between network nodes or in the ingress overlay network node or in the egress overlay network node or in one of the first set of underlay network nodes is detected.

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：US12192086B2

公开(公告)日：2025-01-07

申请号：US17728395

申请日：2022-04-25

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Saumya Dikshit ,  Ashwini Dahiya ,  Srinath Krishna Rao

IPC: H04L43/10 ,  H04L12/46 ,  H04L45/02

Abstract: Systems and methods provide a new type of time-length-value data stream (TLV) which can be encapsulated in an OAM ping packet. This “EVI TLV” encapsulating OAM ping packet can be sent to a network device (e.g., a border router) that a liaison VRF is provisioned on. Upon receipt, the encapsulated EVI TLV instructs the network device to determine whether the configuration of the liaison VRF is mapped to an EVI value specified by the EVI TLV. If the configuration of the liaison VRF is mapped to the specified EVI value, the network device returns an echo response indicating that the configuration of the liaison VRF is mapped onto the specified EVI value. Such a response may indicate that the liaison VRF is reachable for the EVPN.

公开(公告)号：US20240364625A1

公开(公告)日：2024-10-31

申请号：US18141048

申请日：2023-04-28

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Saumya Dikshit ,  N V M Kishore Tanuku

IPC: H04L45/586 ,  H04L45/00 ,  H04L45/64

CPC classification number: H04L45/586 ,  H04L45/64 ,  H04L45/72

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：US12095656B2

公开(公告)日：2024-09-17

申请号：US17391836

申请日：2021-08-02

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Saumya Dikshit ,  Vinayak Joshi ,  Venkatavaradhan Devarajan

IPC: H04L45/28 ,  H04L12/46 ,  H04L41/0604 ,  H04L41/0816 ,  H04L45/24 ,  H04L45/74 ,  H04L101/622

CPC classification number: H04L45/28 ,  H04L12/4633 ,  H04L12/4641 ,  H04L41/0627 ,  H04L41/0816 ,  H04L45/245 ,  H04L45/74 ,  H04L2101/622

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.