公开(公告)号：US10732704B2

公开(公告)日：2020-08-04

申请号：US15872375

申请日：2018-01-16

Applicant: Cisco Technology, Inc.

Inventor： Krishna Kumar Vavilala ,  Ahmed Faraz ,  Saravanan M. K ,  Sachin Modi

IPC: G06F1/26 ,  G06F1/3296 ,  H04L12/10

Abstract: Embodiments described herein include a Power over Ethernet (PoE) enabled device that uses 2-event classification when allocating power to coupled powered devices (PDs). If the 2-event classification is successful, power sourcing equipment (PSE) on the PoE device allocates a maximum power allotment to the PD. Once powered on, the PD may determine it does not require the maximum power allotment and negotiate a reduction in the power allotted to the PD.

公开(公告)号：US09996137B2

公开(公告)日：2018-06-12

申请号：US14810865

申请日：2015-07-28

Applicant: Cisco Technology, Inc.

Inventor： Daniel Lee Chaplin ,  Stephen Patrick Kolecki ,  Krishna Kumar Vavilala ,  Chris Desiniotis

IPC: G06F1/32 ,  H04L12/12 ,  H04W52/02

CPC classification number: G06F1/3209 ,  H04L12/12 ,  H04W52/0229 ,  Y02D70/00

Abstract: Embodiments generally provide techniques for waking up a plurality of network devices from a power saving mode via layer 1 (L1) signaling. Embodiments include entering a power saving mode at a first network device, wherein logic for processing layer 2 and higher data is inactive during the power saving mode and receiving, while the first network device is in the power saving mode, a L1 bit stream from a second network device connected to the first network device. Additionally, embodiments include, upon determining that a predefined code is present within the received L1 bit stream, exiting the power saving mode at the first network device and transmitting a second L1 bit stream containing the predefined code to a third network device.

公开(公告)号：US12001255B2

公开(公告)日：2024-06-04

申请号：US17302641

申请日：2021-05-07

Applicant: Cisco Technology, Inc.

Inventor： Ahmed Faraz ,  Krishna Kumar Vavilala ,  Kabiraj Sethi

IPC: G06F1/26 ,  H04L12/10 ,  H04L12/40 ,  H04L12/413

CPC classification number: G06F1/266 ,  H04L12/10 ,  H04L12/40045 ,  H04L12/413

Abstract: Embodiments described herein improve availability of a power plane in a network device by using a PoE manager that is separate from an operating system in the network device. For example, when the operating system (or a PoE application executing in the operating system) becomes unavailable, either because of failure or system upgrade, the PoE manager continues managing a power plane in the network device such that connected PDs continue to receive DC power. Stated differently, by using a PoE manager that is separate from the operating system, there is no fate sharing between the PoE manager and the operating system. If the operating system is unavailable, the PoE manager continues to provide the same power allotment to the PDs. As such, updates and failures which previously made the power plane unavailable no longer affect the power supplied to the PDs.

公开(公告)号：US09915990B2

公开(公告)日：2018-03-13

申请号：US14474356

申请日：2014-09-02

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Ahmed Faraz ,  Krishna Kumar Vavilala ,  Kabiraj Sethi

IPC: G06F1/26 ,  H04L12/10 ,  H04L12/40 ,  H04L12/413

CPC classification number: G06F1/266 ,  H04L12/10 ,  H04L12/40045 ,  H04L12/413

Abstract: Embodiments described herein improve availability of a power plane in a network device by using a PoE manager that is separate from an operating system in the network device. For example, when the operating system (or a PoE application executing in the operating system) becomes unavailable, either because of failure or system upgrade, the PoE manager continues managing a power plane in the network device such that connected PDs continue to receive DC power. Stated differently, by using a PoE manager that is separate from the operating system, there is no fate sharing between the PoE manager and the operating system. If the operating system is unavailable, the PoE manager continues to provide the same power allotment to the PDs. As such, updates and failures which previously made the power plane unavailable no longer affect the power supplied to the PDs.

公开(公告)号：US11009929B2

公开(公告)日：2021-05-18

申请号：US15891908

申请日：2018-02-08

Applicant: Cisco Technology, Inc.

Inventor： Ahmed Faraz ,  Krishna Kumar Vavilala ,  Kabiraj Sethi

IPC: G06F1/26 ,  H04L12/10 ,  H04L12/40 ,  H04L12/413

Abstract: Embodiments described herein improve availability of a power plane in a network device by using a PoE manager that is separate from an operating system in the network device. For example, when the operating system (or a PoE application executing in the operating system) becomes unavailable, either because of failure or system upgrade, the PoE manager continues managing a power plane in the network device such that connected PDs continue to receive DC power. Stated differently, by using a PoE manager that is separate from the operating system, there is no fate sharing between the PoE manager and the operating system. If the operating system is unavailable, the PoE manager continues to provide the same power allotment to the PDs. As such, updates and failures which previously made the power plane unavailable no longer affect the power supplied to the PDs.

公开(公告)号：US09874930B2

公开(公告)日：2018-01-23

申请号：US14845165

申请日：2015-09-03

Applicant: Cisco Technology, Inc.

Inventor： Krishna Kumar Vavilala ,  Ahmed Faraz ,  Saravanan M.K ,  Sachin Modi

IPC: G06F1/32 ,  H04L12/10 ,  G06F1/26

CPC classification number: G06F1/3296 ,  G06F1/266 ,  H04L12/10

Abstract: Embodiments described herein include a Power over Ethernet (PoE) enabled device that uses 2-event classification when allocating power to coupled powered devices (PDs). If the 2-event classification is successful, power sourcing equipment (PSE) on the PoE device allocates a maximum power allotment to the PD. Once powered on, the PD may determine it does not require the maximum power allotment and negotiate a reduction in the power allotted to the PD.

公开(公告)号：US20160197736A1

公开(公告)日：2016-07-07

申请号：US14588794

申请日：2015-01-02

Applicant: Cisco Technology, Inc.

Inventor： Leonid Shvarzberg ,  Peter Jones ,  Chris Desiniotis ,  Krishna Kumar Vavilala

IPC: H04L12/12 ,  G06F1/32

Abstract: A connectivity device, such as a switch may consume lesser power by transitioning into stand-by mode in response to a command from an upstream connectivity device, such as another switch. In the stand-by mode the switch may power down circuitry of the switch that handles incoming messages. The switch may be powered up from the stand-by mode by using a PHY or Layer-1 components of the switch.

Abstract translation: 响应于来自诸如另一交换机的上游连接设备的命令，诸如交换机的连接设备可以通过转换到待机模式而消耗较小的功率。 在备用模式下，交换机可能会关闭处理传入消息的交换机的电路。 交换机可以通过使用交换机的PHY或第一层组件从备用模式上电。

公开(公告)号：US20140269265A1

公开(公告)日：2014-09-18

申请号：US14289759

申请日：2014-05-29

Applicant: Cisco Technology, Inc.

Inventor： Linda Tin-Wen Cheng ,  Krishna Kumar Vavilala

IPC: H04L12/703

CPC classification number: H04L45/28 ,  H04L41/0668 ,  H04L41/0853 ,  H04L45/22

Abstract: In an example embodiment, there is disclosed an apparatus comprising a plurality of ports and routing logic coupled with the plurality of ports. The routing logic obtains data representative of a first port configuration for the plurality of ports, the first port configuration comprises data representative of a status for individual ports selected from the plurality of ports, the status indicating whether an individual port selected from the plurality of ports is an open port, an alternate port, or a failed port. The routing logic forwards data in accordance with the first port configuration. The routing logic also obtains data representative of an alternate port configuration for the plurality of ports, the alternate port configuration is to be employed upon determining a predefined link has failed. The alternate configuration comprising a new status for individual ports selected from the plurality of ports.

Abstract translation: 在一个示例性实施例中，公开了一种包括与多个端口耦合的多个端口和路由逻辑的装置。 所述路由逻辑获得表示所述多个端口的第一端口配置的数据，所述第一端口配置包括表示从所述多个端口中选择的各个端口的状态的数据，所述状态指示从所述多个端口中选择的各个端口 是一个开放端口，一个备用端口或一个故障端口。 路由逻辑根据第一个端口配置转发数据。 路由逻辑还获得表示多个端口的备用端口配置的数据，在确定预定链路失败时将采用备用端口配置。 替代配置包括从多个端口中选择的各个端口的新状态。

公开(公告)号：US09413642B2

公开(公告)日：2016-08-09

申请号：US14289759

申请日：2014-05-29

Applicant: Cisco Technology, Inc.

Inventor： Linda Tin-Wen Cheng ,  Krishna Kumar Vavilala

IPC: H04L1/00 ,  H04L12/703 ,  H04L12/24 ,  H04L12/707

CPC classification number: H04L45/28 ,  H04L41/0668 ,  H04L41/0853 ,  H04L45/22

Abstract: In an example embodiment, there is disclosed an apparatus comprising a plurality of ports and routing logic coupled with the plurality of ports. The routing logic obtains data representative of a first port configuration for the plurality of ports, the first port configuration comprises data representative of a status for individual ports selected from the plurality of ports, the status indicating whether an individual port selected from the plurality of ports is an open port, an alternate port, or a failed port. The routing logic forwards data in accordance with the first port configuration. The routing logic also obtains data representative of an alternate port configuration for the plurality of ports, the alternate port configuration is to be employed upon determining a predefined link has failed. The alternate configuration comprising a new status for individual ports selected from the plurality of ports.

Abstract translation: 在一个示例性实施例中，公开了一种包括与多个端口耦合的多个端口和路由逻辑的装置。 所述路由逻辑获得表示所述多个端口的第一端口配置的数据，所述第一端口配置包括表示从所述多个端口中选择的各个端口的状态的数据，所述状态指示从所述多个端口中选择的各个端口 是一个开放端口，一个备用端口或一个故障端口。 路由逻辑根据第一个端口配置转发数据。 路由逻辑还获得表示多个端口的备用端口配置的数据，在确定预定链路失败时将采用备用端口配置。 替代配置包括从多个端口中选择的各个端口的新状态。