公开(公告)号：US20230198803A1

公开(公告)日：2023-06-22

申请号：US17644940

申请日：2021-12-17

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Christopher Murray

IPC: H04L12/437 ,  H04L43/10 ,  H04L45/00

CPC classification number: H04L12/437 ,  H04L43/10 ,  H04L45/26

Abstract: Techniques for uplink connectivity determination are disclosed. In an example, a Frame Link Module (FLM) in a frame, belonging to a group of frames connected in a ring network, may generate an uplink discovery packet. The FLM may determine, based on a Link Layer Discovery Protocol (LLDP) packet received by the standby uplink from a customer network accessing the ring that the standby uplink has a link to the customer network. The FLM may forward the uplink discovery packet to the standby uplink via a Peripheral Component Interconnect (PCI) interface. The FLM may send the uplink discovery packet to the customer network through the standby uplink directed to an owner FLM. The owner FLM may monitor receipt of the uplink discovery packet from the customer network through a current active uplink and on successful receipt may determine that the standby uplink and switches in the customer network are correctly configured.

公开(公告)号：US11108623B2

公开(公告)日：2021-08-31

申请号：US16258050

申请日：2019-01-25

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Christopher Murray

IPC: H04L12/26 ,  H04L12/437 ,  H04L12/24 ,  H04L12/46 ,  H04L12/931 ,  H04L12/64

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.

公开(公告)号：US10812289B2

公开(公告)日：2020-10-20

申请号：US16080598

申请日：2016-03-18

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Christopher Murray

IPC: H04L12/423 ,  H04L12/46 ,  H04L29/06 ,  H04L12/28 ,  H04L12/42

Abstract: An example communications device may include communication ports and processing circuitry. The communications device may, when the communication device and peer network nodes are connected in a ring topology to form an access network, detect that a loop exists between the access network and a customer network. In response to detecting the loop, the communication device may automatically block any uplink to the customer network that the communication device may have, and send a message to all of the peer network nodes instructing them to block any uplinks to the customer network they may have.

公开(公告)号：US10470111B1

公开(公告)日：2019-11-05

申请号：US15961950

申请日：2018-04-25

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Christopher Murray

IPC: H04W4/00 ,  H04W48/16 ,  H04W48/14 ,  H04L12/24 ,  H04W8/00

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：US20190332501A1

公开(公告)日：2019-10-31

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

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：US20180270083A1

公开(公告)日：2018-09-20

申请号：US15763772

申请日：2015-09-30

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Christopher Murray

IPC: H04L12/437 ,  H04L12/24

Abstract: According to an example method, it is determined that a first network node in a ring network is claimed by a first managing device and a second network node in the ring network is claimed by a second managing device. The ring network includes a single link to a customer network. The second network node is then isolated from the first network node. A separate linear network is formed including the second network node. Upon reset of the second network node to an unclaimed status, the second network node is claimed by the first managing device.

公开(公告)号：US11860754B2

公开(公告)日：2024-01-02

申请号：US17818050

申请日：2022-08-08

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 ,  G06F3/06 ,  G06F9/4401

CPC classification number: G06F11/3037 ,  G06F3/0604 ,  G06F3/0632 ,  G06F3/0679 ,  G06F9/4401 ,  G06F11/076 ,  G06F11/0772 ,  G06F11/1441 ,  G06F11/3442 ,  G06F12/0238 ,  G06F12/0871 ,  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：US11729022B2

公开(公告)日：2023-08-15

申请号：US17644940

申请日：2021-12-17

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Christopher Murray

IPC: H04L12/437 ,  H04L45/00 ,  H04L43/10

CPC classification number: H04L12/437 ,  H04L43/10 ,  H04L45/26

Abstract: Techniques for uplink connectivity determination are disclosed. In an example, a Frame Link Module (FLM) in a frame, belonging to a group of frames connected in a ring network, may generate an uplink discovery packet. The FLM may determine, based on a Link Layer Discovery Protocol (LLDP) packet received by the standby uplink from a customer network accessing the ring that the standby uplink has a link to the customer network. The FLM may forward the uplink discovery packet to the standby uplink via a Peripheral Component Interconnect (PCI) interface. The FLM may send the uplink discovery packet to the customer network through the standby uplink directed to an owner FLM. The owner FLM may monitor receipt of the uplink discovery packet from the customer network through a current active uplink and on successful receipt may determine that the standby uplink and switches in the customer network are correctly configured.

公开(公告)号：US20210224167A1

公开(公告)日：2021-07-22

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

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：US10516625B2

公开(公告)日：2019-12-24

申请号：US15333167

申请日：2016-10-24

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Christopher Murray

IPC: H04L12/933

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.