# US 2019/0319829 A1 · Dcn packet processing method, network device, and network system

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- Number: US 2019/0319829 A1
- Document ID: US20190319829A1
- Status: Published application
- Kind: A1
- Application number: 16/453,692
- Filed: 2019-06-26
- Published: 2019-10-17
- Earliest claimed: 2016-12-26
- Assignees: Huawei Technologies Co., Ltd.
- Applicants: Huawei Technologies Co., Ltd.
- Inventors: Xiaodi LI; Chuan GAO
- Web page: https://patentgrep.com/patent/US20190319829A1

## CPC

- H04L 61/10: of different types
- H04J 3/1652: {Optical Transport Network [OTN]}
- H04L 41/04: Network management architectures or arrangements
- H04L 61/5007: Internet protocol [IP] addresses
- H04L 41/34: Signalling channels for network management communication
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04J: MULTIPLEX COMMUNICATION (transmission in general H04B; peculiar to transmission of digital information H04L5/00; systems for the simultaneous or sequential transmission of more than one television signal H04N7/08; in exchanges H04Q11/00; stereophonic systems H04S)

## Abstract

This application provides a DCN packet processing method, a network device, and a network system. The DCN packet processing method includes: generating, by a network device, a first DCN packet whose destination address is an IP address of an NMS, loading the first DCN packet into a Flex Eth overhead multiframe, and sending, over a physical link, the Flex Eth overhead multiframe to a network device that has accessed a network, so that the network device that has accessed the network extracts the first DCN packet, and sends the first DCN packet to the NMS based on the destination address, so as to enable the NMS to perceive that a new network device accesses the network.

## Claims

### Claim 1

A data communication network (DCN) packet processing method, wherein the method comprises:
generating, by a first network device, a first DCN packet, wherein a destination address of the first DCN packet is an IP address of a network management system (NMS), a next hop through which the first DCN packet passes to arrive at the destination address of the first DCN packet is a second network device, and the first network device and the second network device are connected by using a physical link;
loading, by the first network device, the first DCN packet into a flexible Ethernet (Flex Ethernet) overhead multiframe; and
sending, by the first network device, the Flex Ethernet overhead multiframe to the second network device by using the physical link, so that the second network device extracts the first DCN packet from the Flex Ethernet overhead multiframe, and forwards the first DCN packet to the NMS.

### Claim 2 (depends on 1)

The data communication network DCN packet processing method according to claim 1, wherein the loading, by the first network device, the first DCN packet into a flexible Ethernet Flex Ethernet overhead multiframe comprises:
loading, by the first network device, the first DCN packet on a section management channel of the Flex Ethernet overhead multiframe; or
loading, by the first network device, the first DCN packet on a shim to shim management channel of the Flex Ethernet overhead multiframe; or
splitting, by the first network device, the first DCN packet and loading the first DCN packet on a section management channel and a shim to shim management channel of the flexible Ethernet Flex Ethernet overhead multiframe.

### Claim 3 (depends on 1)

The data communication network DCN packet processing method according to claim 1, further comprising:
generating, by the first network device, a second DCN packet, wherein a destination address of the second DCN packet is the IP address of the NMS, a next hop through which the second DCN packet passes to arrive at the destination address of the first DCN packet is the second network device;
monitoring, by the first network device, a state of a Flex Ethernet client, and determining that the state of the Flex Ethernet client is a conducted state; and
sending, by the first network device, the second DCN packet to the second network device through the Flex Ethernet client.

### Claim 4 (depends on 1)

The data communication network DCN packet processing method according to claim 1, further comprising:
buffering, by the first network device, the first DCN packet; or buffering, by the first network device, the second DCN packet.

### Claim 5

A network device, used as a first network device, wherein the first network device comprises:
a memory comprising instructions;
one or more processors coupled to the memory, wherein the instructions cause the first network device to be configured to:
generate a first data communication network (DCN) packet, wherein a destination address of the first DCN packet is an IP address of a network management system (NMS), a next hop through which the first DCN packet passes to arrive at the destination address of the first DCN packet is a second network device, and the first network device and the second network device are connected by using a physical link;
load the first DCN packet into a flexible Ethernet (Flex Ethernet) overhead multiframe; and
send the Flex Ethernet overhead multiframe to the second network device over the physical link, so that the second network device extracts the first DCN packet from the Flex Ethernet overhead multiframe, and forwards the first DCN packet to the NMS.

### Claim 6 (depends on 5)

The network device according to claim 5, wherein the instructions cause the first network device to be configured to: load the first DCN packet on a section management channel of the flexible Ethernet Flex Ethernet overhead multiframe; or load the first DCN packet on a shim to shim management channel of the Flex Ethernet overhead multiframe; or load the first DCN packet on a section management channel and a shim to shim management channel of the flexible Ethernet Flex Ethernet overhead multiframe.

### Claim 7 (depends on 5)

The network device according to claim 5, wherein the instructions cause the first network device to be configured to:
generate a second DCN packet, wherein a destination address of the second DCN packet is the IP address of the NMS, a next hop through which the second DCN packet passes to arrive at the destination address of the first DCN packet is the second network device; and
monitor a state of a Flex Ethernet client, determine that the state of the Flex Ethernet client is a conducted state, and send the second DCN packet to the second network device through the Flex Ethernet client.

### Claim 8 (depends on 5)

The network device according to claim 5, wherein the instructions cause the first network device to be configured to:
buffer the first DCN packet.

### Claim 9

A network device, used as a second network device, wherein the second network device comprises:
a memory comprising instructions;
one or more processors coupled to the memory, wherein the instructions cause the first network device to be configured to:
receive a flexible Ethernet (Flex Ethernet) overhead multiframe sent by a first network device over a physical link, and extract a first data communication network (DCN) packet from the Flex Ethernet overhead multiframe, wherein a destination address of the first DCN packet is an IP address of a network management system (NMS), the second network device is a next hop through which the first DCN packet passes to arrive at the destination address of the first DCN packet, and the second network device and the first network device are connected by using the physical link; and
send the first DCN packet to the NMS based on the destination address.

### Claim 10 (depends on 9)

The network device according to claim 9, wherein the instructions cause the second network device to be configured to: extract the first DCN packet from a section management channel of the Flex Ethernet overhead multiframe; or extract the first DCN packet from a shim to shim management channel of the Flex Ethernet overhead multiframe; or extract the first DCN packet from a section management channel and a shim to shim management channel of the Flex Ethernet overhead multiframe.

### Claim 11 (depends on 9)

The network device according to claim 9, wherein the instructions cause the second network device to be configured to:
buffer the first DCN packet.