公开(公告)号：US20190335386A1

公开(公告)日：2019-10-31

申请号：US15961950

申请日：2018-04-25

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Christopher Murray

IPC: H04W48/16 ,  H04W8/00 ,  H04L12/24 ,  H04W48/14

Abstract: The IEEE 802.1D specification has reserved a group of MAC addresses that should not be forwarded by a switch. Protocols like LLDP use the reserved MAC address to communicate directly with a switch to share configure information. There are non-compliant 802.1D switches and hubs that incorrectly broadcast the packets using the reserved MAC addresses out all ports except the ingress port. When multiple uplinks are connected to an unmanaged switch it may cause confusion because each uplink may receive LLDP packets from every other uplink. Frame Link Modules (FLMs) that receive an LLDP packet from another management port may determine if the management uplinks are connected together or if the packets are being received from an unmanaged switch. Disclosed is a method to determine if an uplink from a network uplink is connected to a noncompliant 802.1D switch or connected directly to another FLM uplink.

公开(公告)号：US11461198B2

公开(公告)日：2022-10-04

申请号：US17224639

申请日：2021-04-07

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Christopher Murray

IPC: G06F11/20 ,  H04L12/24 ,  H04L12/46 ,  H04L12/437 ,  H04L41/0654 ,  G06F11/14

Abstract: A method and system are disclosed to enable an FLM designated as an owner, in a group of frames having redundant FLMs per frame, to ensure that an unresponsive “active” uplink is disabled, prior to allowing another uplink in the frame to become the active uplink. A group of frames, configured in a ring network topology, may only have a single uplink at a time. Otherwise, two or more concurrent active uplinks may cause a network loop that may result in total network failure (e.g., network crash). The disclosed method utilizes a coordination between an FLM owner on the ring and the neighbor FLM, in the same frame as the non-responsive FLM, to disable the active uplink, prior to transitioning to a new active uplink for the group of frames.

公开(公告)号：US11442832B2

公开(公告)日：2022-09-13

申请号：US17102501

申请日：2020-11-24

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Christopher Murray

IPC: G06F12/00 ,  G06F11/30 ,  G06F11/14 ,  G06F12/0871 ,  G06F11/07 ,  G06F12/02 ,  G06F11/34 ,  G06F12/0893 ,  G06F12/10

Abstract: Examples described herein relate to a system including a first management system having a primary memory including a free memory, a used memory, and a loosely reserved memory, where the loosely reserved memory comprises cache memory having a reclaimable memory; and a processing resource coupled to the primary memory. The processing resource may monitor an amount of the used memory and an amount of an available memory during runtime of the first management system. Further, the processing resource may enable a synchronized reboot of the first management system if the amount of the used memory is greater than a memory exhaustion first threshold or the amount of the available memory is less than a memory exhaustion second threshold, wherein the memory exhaustion first threshold and the memory exhaustion second threshold are determined based on usage of the reclaimable memory and a number of major page faults.

公开(公告)号：US10997041B2

公开(公告)日：2021-05-04

申请号：US15962015

申请日：2018-04-25

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Christopher Murray

IPC: G06F11/20 ,  H04L12/24 ,  H04L12/437 ,  H04L12/46 ,  G06F11/14

Abstract: A method and system are disclosed to enable an FLM designated as an owner, in a group of frames having redundant FLMs per frame, to ensure that an unresponsive “active” uplink is disabled, prior to allowing another uplink in the frame to become the active uplink. A group of frames, configured in a ring network topology, may only have a single uplink at a time. Otherwise, two or more concurrent active uplinks may cause a network loop that may result in total network failure (e.g., network crash). The disclosed method utilizes a coordination between an FLM owner on the ring and the neighbor FLM, in the same frame as the non-responsive FLM, to disable the active uplink, prior to transitioning to a new active uplink for the group of frames.

公开(公告)号：US10742493B1

公开(公告)日：2020-08-11

申请号：US16266850

申请日：2019-02-04

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Stephen Kay ,  Long Sam ,  Christopher Murray

IPC: H04L12/24 ,  H04L12/46 ,  H04L12/26 ,  H04L12/933 ,  H04L29/06 ,  H04L12/803

Abstract: Remote configuration of network interface cards (NICs) on appliances of a scaleable compute resource such as a frame-based system is disclosed. Frames may include a frame link module (FLM). Remote configuration of NICs may allow for multiple networks to be maintained in physical or logical isolation from each other. For example, a management data network may be maintained independently of an application data network. An FLM CPU may detect an appliance, validate compatibility for the appliance, a midplane, a PHY connection, etc. Commands from the FLM CPU may configure the independent networks. Independent networks may provide redundancy and segregation by data type. A controller area network (CAN) bus may deliver configuration commands to a NIC of an attached appliance. Air gap equivalent isolation of networks based on type of network may be achieved while maintaining redundancy of networks to address potential failure of individual components.

公开(公告)号：US20190334935A1

公开(公告)日：2019-10-31

申请号：US15966038

申请日：2018-04-30

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Christopher Murray

IPC: H04L29/06 ,  H04L12/24 ,  H04L12/26 ,  H04L29/12

Abstract: Detecting a foreign device is connected between what are expected to be directly connected network modules may present a network security concern. Disclosed is a protocol and method for detecting that an unexpected (i.e., foreign) device is in an unexpected location in a network path. For example, connected between two network nodes that are expected to be directly connected to each other. Scalable compute resources may rely on direct network connectivity to provide high availability, throughput, and security. Accordingly, determining a foreign device exists in the network path between two frame link modules (FLMs), for example, may address this need for security and reliability. A device connected to sniff network data may not advertise itself to the network and therefore may be actively detected using the disclosed methods.

公开(公告)号：US20180152318A1

公开(公告)日：2018-05-31

申请号：US15578216

申请日：2015-06-01

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Christopher Murray

IPC: H04L12/46 ,  H04L12/705 ,  H04L12/707 ,  H04L12/24

CPC classification number: H04L12/4637 ,  H04L12/42 ,  H04L41/0816 ,  H04L45/18 ,  H04L45/22

Abstract: Examples herein involve establishing communication links between a first ring protection network in communication with a service network and a second ring protection network in communication with a service network, the communication links between the first ring protection network and the second ring protection network to form a management network ring; determining an owner of the management network ring; and establishing a single uplink between one network module of the management network ring and the service network.

公开(公告)号：US20180115500A1

公开(公告)日：2018-04-26

申请号：US15333167

申请日：2016-10-24

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Christopher Murray

IPC: H04L12/933 ,  H04L12/46 ,  H04L12/935 ,  H04L12/18

Abstract: Examples described herein relate to a network entity on a ring network. In an example, a method includes receiving a first packet by a first network entity via a ring network. It is determined from the first packet that the ring network has a plurality of management entities each claiming a respective network entity. Based on the ring network having the plurality of management entities each claiming the respective network entity, the first network entity is transitioned from an unclaimed state to a dummyclaim state, and the first network entity is isolated from a portion of the ring network.

公开(公告)号：US11171810B1

公开(公告)日：2021-11-09

申请号：US17065271

申请日：2020-10-07

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Christopher Murray

IPC: G06F15/173 ,  H04L12/46 ,  H04L29/12

Abstract: Techniques for detecting misconfiguration of an uplink or an external network device connected with the uplink is disclosed. In an aspect, a Frame Link Module (FLM) in a frame belonging to a group of frames connected in a ring network, may determine that an uplink of the FLM is configured in a management mode. The FLM may determine, based on a system description associated with a Link Layer Discovery Protocol (LLDP) packet, whether the uplink is connected to a network device in an external network. Based on Virtual Local Area Network (VLAN) traffic being dropped, it may be determined that VLAN configuration of one of the uplink and the network device is incompatible for operation in the management mode. The uplink with incompatible VLAN configuration or the uplink connected with a network switch having incompatible VLAN configuration may be removed from a group of uplinks available for selection as an active uplink for the frames.

公开(公告)号：US20200244516A1

公开(公告)日：2020-07-30

申请号：US16258050

申请日：2019-01-25

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Christopher Murray

IPC: H04L12/24 ,  H04L12/26 ,  H04L12/931 ,  H04L12/46

Abstract: Systems and methods address automated ring owner selection for a ring topology network. A new ring owner may be selected based on failure of a current ring owner. The new ring owner may assume a ring ownership role by a) detecting a missing Ownership Select Message (OSM); b) detecting missing Continuity Check Protocol (CCP) messages; and c) determining that the current ring owner is an adjacent network module connected via an external link of a management network. A signal fail (SF) condition may also be present. Upon detection of adequate role changing conditions, a new ring owner may assume a ring ownership role, transmit an OSM and possibly select a new active uplink.