DCN packet processing method, network device, and system

A data communication network (DCN) packet processing method, comprising:

• generating, by a control device, a first DCN packet, wherein the first DCN packet comprises a target device identifier, and the target device identifier corresponds to a second network device;
• mapping, by the control device, the first DCN packet to a payload area of a first data frame;
• and
• sending the first data frame to a first network device to enable the first network device to forward the first DCN packet to the second network device based on the target device identifier, wherein the first network device is configured to:
• send a second DCN packet to a hardware processor, wherein the second DCN packet comprises an address of at least one alarm register;
• query the at least one alarm register based on the second DCN packet;
• and
• in response to receiving alarm information from the at least one alarm register, send the alarm information.

A network device for data communication network (DCN) packet processing, comprising:

• a hardware processor;
• a transmitter;
• and
• one or more memories storing programming instructions for execution by the network device to:
• obtain a first DCN packet, wherein the first DCN packet is carried in a payload area of a first data frame, and the first DCN packet comprises a target device identifier;
• determine, based on the target device identifier, whether the first DCN packet is a direct packet;
• in response to determining that the first DCN packet is a direct packet, send, by using the transmitter, the first DCN packet to a second network device, wherein the second network device corresponds to the target device identifier;
• send a second DCN packet to the hardware processor, wherein the second DCN packet comprises an address of at least one alarm register;
• query the at least one alarm register based on the second DCN packet;
• and
• in response to receiving alarm information from the at least one alarm register, send the alarm information.

A system comprising a control device and a first network device, wherein the control device comprises:

• a generator;
• a transmitter;
• at least one processor;
• and
• one or more memories coupled to the at least one processor and storing programming instructions for execution by the at least one processor to:
• generate, by using the generator, a first data communication network (DCN) packet, wherein the first DCN packet is used to control a second network device, the first DCN packet comprises a target device identifier, and the target device identifier corresponds to the second network device;
• map, by using the transmitter, the first DCN packet to a payload area of a first data frame;
• and
• send, by using the transmitter, the first data frame to the first network device, to enable the first network device to forward the first DCN packet to the second network device based on the target device identifier;
• and wherein the first network device comprises:
• a hardware processor;
• and
• one or more memories storing programming instructions for execution by the first network device to:
• send a second DCN packet to the hardware processor, wherein the second DCN packet comprises an address of at least one alarm register;
• query the at least one alarm register based on the second DCN packet;
• and
• in response to receiving alarm information from the at least one alarm register, send the alarm information.