公开(公告)号：US20240022451A1

公开(公告)日：2024-01-18

申请号：US17813103

申请日：2022-07-18

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Saumya Dikshit ,  Rajeev Jain

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

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

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：US11528224B1

公开(公告)日：2022-12-13

申请号：US17503157

申请日：2021-10-15

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Saumya Dikshit ,  Venkatavaradhan Devarajan

IPC: G06F15/173 ,  H04L45/64

Abstract: A system for redirecting traffic is provided. The system can allow a first switch to participate in a virtual switch in conjunction with a second switch of an overlay tunnel fabric. A path between a respective switch pair of an underlying network of the fabric can be determined based on a routing process. The first and second switches may individually participate in the routing process. Hence, the packets to a tunnel to the virtual switch can be distributed among paths to the first and second switches. The system can determine a trigger condition indicating that packets subsequently received via the tunnel is to be directed to a path to the second switch. The first and second switches can remain in an operational state. The system can then advertise a high cost for a link to the first switch for the routing process in the underlying network.

公开(公告)号：US20220191120A1

公开(公告)日：2022-06-16

申请号：US17221813

申请日：2021-04-04

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Saumya Dikshit ,  Vinayak Joshi

IPC: H04L12/26 ,  H04L12/703 ,  H04L12/721 ,  H04L12/707 ,  H04L12/46

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.