公开(公告)号：US20190253268A1

公开(公告)日：2019-08-15

申请号：US16391021

申请日：2019-04-22

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Shiyong FU ,  Yan ZHUANG ,  Jincan CAO ,  Fuguang HUANG ,  Xueqi CHEN ,  Rui HUA

IPC: H04L12/10 ,  H04L12/40 ,  G06F1/26 ,  G06F1/30

CPC classification number: H04L12/10 ,  G06F1/266 ,  G06F1/30 ,  H04L12/40045

Abstract: A network device includes a power system, a processor, a power sourcing equipment PSE chip coupled to a first forward power supply port, and a first powered device PD chip coupled to a first reverse power receiving port. A first powered device is connected to the first forward power supply port and the first reverse power receiving port. When detecting that a power failure occurs on the network device, the processor instructs the first PD chip to draw power from the first powered device; the first PD chip draws the power from the first powered device through the first reverse power receiving port, and supplies the obtained power to the power system. Therefore, when a power failure occurs, the network device can continue to obtain power and work properly when the power failure occurs.