CN111131435A - Method for discovering and configuring Ethernet link layer equipment - Google Patents
Method for discovering and configuring Ethernet link layer equipment Download PDFInfo
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- CN111131435A CN111131435A CN201911322118.5A CN201911322118A CN111131435A CN 111131435 A CN111131435 A CN 111131435A CN 201911322118 A CN201911322118 A CN 201911322118A CN 111131435 A CN111131435 A CN 111131435A
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- configuration
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/51—Discovery or management thereof, e.g. service location protocol [SLP] or web services
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/30—Definitions, standards or architectural aspects of layered protocol stacks
- H04L69/32—Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
- H04L69/322—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions
- H04L69/324—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions in the data link layer [OSI layer 2], e.g. HDLC
Abstract
The invention provides a method for discovering and configuring Ethernet link layer equipment, which comprises the following steps: defining a communication protocol based on an Ethernet link layer; the configuration software sends a search message to the local area network in an MAC address broadcasting mode; after receiving the search message, the DDC controller sends a search response message to a search end in a point-to-point mode, wherein the search response message comprises equipment MAC address, equipment type, IP address, subnet mask and gateway address information; the searching terminal identifies the response message, records the information of all response DDC controllers by taking the MAC address as a unique identifier, forms an equipment list and presents the equipment list to the user; a user selects a DDC controller in a device list of configuration software, and modifies IP address information in a point-to-point mode; and after receiving the configuration message, the DDC controller stores the configuration information and responds to the configuration software in a point-to-point mode. The invention avoids that irrelevant equipment in the network receives meaningless messages and avoids the occupation of network bandwidth.
Description
Technical Field
The invention relates to a communication technology, in particular to a method for discovering and configuring Ethernet link layer equipment.
Background
With the rapid development and application of ethernet technology, the conventional DDC controller based on RS485 bus in building automation industry is being replaced by the DDC controller based on ethernet interface. The DDC controller based on the ethernet interface generally supports the TCP/IP protocol, and needs to configure information such as an IP address, a subnet mask, a gateway address, and the like, and only after configuring the information, the DDC controller can normally perform networking. Unlike the DDC controller based on the RS485 bus, the DDC controller based on the Ethernet interface cannot simply adopt a dial switch mode to set the information, and the DDC controller rarely provides a man-machine interaction interface with a liquid crystal display screen based on cost consideration, but adopts a network communication mode, and configuration software running on a PC end configures information such as an IP address and the like for the DDC controller through a specific protocol based on TCP/IP.
Based on the requirement that the configuration software running at the PC end and the DDC controller are in the same IP network segment in IP network communication, generally, a manufacturer configures a fixed IP address and a subnet mask for the DDC controller when the DDC controller leaves a factory, and when the DDC controller is deployed on an engineering site, the communication can be realized only by setting the PC where the configuration software is located to be in the same IP network segment.
In an actual engineering project, dozens of DDC controllers are often arranged in a local area network, the DDC controllers are generally installed before a field engineer plans an IP address, IP address conflict is caused due to the fact that factory IP addresses are the same, and configuration software cannot perform point-to-point communication on a certain DDC controller.
In another case, the deployed DDC controllers may be in different IP network segments, and in the conventional method, a plurality of IP network segments are generally set on a PC where configuration software is located, or a manner of multiple network cards is adopted, where each network card is set to a different network segment.
For the above two situations, there is a device search scheme based on the ethernet link layer in the prior art, such as "a cross-network device search and communication method" in the pending patent application No. 201610859757.5. The patent can solve the two problems, namely, the function of searching equipment is realized under the condition of IP address conflict or cross-network section. However, the method described in this patent does not require that the device side broadcasts the message by using the ethernet link layer whose destination addresses are FF, and FF when responding to the search side, and it is not reasonable that the device needs to send the information packet every 30 seconds. Unreasonable in two points: 1. in the patent application, the device cannot respond to the search message in a point-to-point manner, so that other devices in the network cannot receive the meaningless message; 2. in the patent application, the extra network bandwidth is occupied by sending information data packets every 30 seconds in the ethernet local area network, and the number of messages is not limited in consideration of the situation that the number of devices in the local area network is large.
Disclosure of Invention
In view of the shortcomings in the prior art, it is an object of the present invention to provide a method for ethernet link layer device discovery and configuration. The technical scheme of the invention is as follows:
a method for Ethernet link layer device discovery and configuration, comprising the steps of:
s1: defining a communication protocol based on an Ethernet link layer;
s2: configuring software to initiate equipment search;
s3: the DDC controller responds to the device searching command;
s4: the configuration software stores and displays the searched DDC controller information;
s5: a user selects a certain searched DDC controller, modifies and issues configuration;
s6: the DDC controller stores the new configuration and responds to the configuration software.
Further, the step S2 further includes: and the configuration software sends a search message to the local area network in an MAC address broadcasting mode.
Further, the step S3 further includes: after receiving the search message, the DDC controller sends a search response message to the search terminal in a point-to-point mode, wherein the search response message comprises equipment MAC address, equipment type, IP address, subnet mask and gateway address information.
Further, the step S4 further includes: and the searching terminal identifies the response message, records the information of all the response DDC controllers by taking the MAC address as a unique identifier, forms an equipment list and presents the equipment list to the user.
Further, the step S5 further includes: the user selects a DDC controller from the device list of the configuration software and modifies the IP address information in a point-to-point mode.
Further, the step S6 further includes: and after receiving the configuration message, the DDC controller stores the configuration information and responds to the configuration software in a point-to-point mode.
Further, in step S1, the type of the "communication protocol" is 0x 8890.
Further, the method is based on the second layer of the TCP/IP protocol, the data link layer.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention adopts a point-to-point response mode when the equipment responds to the search command, thereby avoiding that irrelevant equipment in the network receives meaningless messages.
2. The invention can not send any message at regular time in the network, thus avoiding the occupation of network bandwidth.
3. The invention can find, identify and configure the DDC controller with the Ethernet interface in the local area network, and can still realize the aim even if the IP addresses of the DDC controllers conflict or the DDC controllers cross network segments.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
fig. 1 is a flowchart of a method for discovering and configuring an ethernet link layer device according to an embodiment of the present invention;
FIG. 2 is a system deployment diagram of an embodiment of the present invention;
FIG. 3 illustrates an Ethernet link layer device communication protocol in accordance with an embodiment of the present invention;
fig. 4 is a discovery request command packet according to an embodiment of the present invention;
FIG. 5 is a discovery response command message in accordance with an embodiment of the present invention;
FIG. 6 is a device search result presentation in accordance with an embodiment of the present invention;
FIG. 7 is an equipment configuration interface according to an embodiment of the present invention;
FIG. 8 is a command message "configure request" according to an embodiment of the present invention;
fig. 9 is a "configuration response" command packet according to an embodiment of the present invention.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
As shown in fig. 1 and fig. 2, the present embodiment discloses a method for discovering and configuring an ethernet link layer device, which includes the following steps:
s1: a communication protocol based on the ethernet link layer is defined as shown in fig. 3.
The communication protocol is as follows: the central control device discovery protocol is named as SupDeviceDetection protocol, and is abbreviated as SDD protocol. The purpose of discovering and configuring equipment across IP network segments is achieved by defining the data message format on the Ethernet link layer. The type of the "communication protocol" is 0x 8890.
S2: configuring software to initiate a device search, further comprising: and the configuration software sends a search message to the local area network in an MAC address broadcasting mode.
The configuration software initiates a device search command, protocol type 0x8890, target address ff: ff: ff: ff: ff, representing an Ethernet link layer broadcast. The ServiceId + servicetypee 0x0101 indicates the "discovery request" command. As shown in fig. 4.
S3: the DDC controller responds to the device search command, further comprising: after receiving the search message, the DDC controller sends a search response message to the search terminal in a point-to-point mode, wherein the search response message comprises equipment MAC address, equipment type, IP address, subnet mask and gateway address information. Wherein:
the DDC controller responds to the configuration software in a point-to-point manner after receiving the discovery request command, which can be done because the MAC address of the configuration software is included in the discovery request command. The protocol type 0x8890, the destination address is the MAC address of the PC where the configuration software is located, and ServiceId + servicetypee ═ 0x0102 indicates the "discovery response" command. The user data includes the IP address, subnet mask, gateway address, device type, and device name information of the device, as shown in fig. 5.
S4: the configuration software stores and displays the searched DDC controller information, and further comprises the following steps: and the searching terminal identifies the response message, records the information of all the response DDC controllers by taking the MAC address as a unique identifier, forms an equipment list and presents the equipment list to the user.
The configuration software stores the responses of all devices on the network and presents the search results in an intuitive manner, as shown in fig. 6.
S5: and the user selects a certain searched DDC controller, modifies the DDC controller and issues the DDC controller. It further comprises: a user selects a DDC controller from a device list of configuration software, and modifies information such as an IP address in a point-to-point mode.
The user selects a specific device, modifies and issues configuration values, and the parameters capable of being modified comprise an IP address, a subnet mask and a gateway address. As shown in fig. 7 and 8. Fig. 7 is a user configuration interface, and fig. 8 is a communication message. The communication message shows that when a specific DDC controller is configured, the destination address is the MAC address of the DDC controller, which is a point-to-point configuration mode. The protocol type 0x8890, ServiceId + ServiceTyPe ═ 0x0201 denotes a "configuration request" command.
S6: the DDC controller stores the new configuration and responds to the configuration software. It further comprises: and after receiving the configuration message, the DDC controller stores the configuration information and responds to the configuration software in a point-to-point mode.
After receiving the configuration request command, the DDC controller stores the configuration information and responds to the configuration result. The protocol type 0x8890, the destination address is the MAC address of the PC where the configuration software is located, and ServiceId + servicetypee ═ 0x0202 indicates the "configuration response" command. As shown in fig. 9.
The method of the invention is based on the second layer of TCP/IP protocol, namely the data link layer, under the IP layer, the method can cross IP network segments, and can realize the discovery, identification and configuration of the DDC controller even under the condition of IP address conflict.
Aiming at the defects of the prior art, the invention realizes a communication protocol defined on an Ethernet link layer, realizes the method for discovering, identifying and configuring the equipment under the conditions of IP address conflict and cross-network segment, adopts a broadcast search and point-to-point single response mode in the search stage, and adopts a point-to-point configuration mode in the configuration stage, thereby avoiding the network equipment from receiving meaningless messages and effectively reducing the occupation of network bandwidth.
It should be noted that the present embodiment can be applied to the field of building automatic control, but is not limited to this technical field.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (8)
1. A method for ethernet link layer device discovery and configuration, comprising the steps of:
s1: defining a communication protocol based on an Ethernet link layer;
s2: configuring software to initiate equipment search;
s3: the DDC controller responds to the device searching command;
s4: the configuration software stores and displays the searched DDC controller information;
s5: a user selects a certain searched DDC controller, modifies and issues configuration;
s6: the DDC controller stores the new configuration and responds to the configuration software.
2. The method of claim 1, wherein the step S2 further comprises: and the configuration software sends a search message to the local area network in an MAC address broadcasting mode.
3. The method of claim 2, wherein the step S3 further comprises: after receiving the search message, the DDC controller sends a search response message to the search terminal in a point-to-point mode, wherein the search response message comprises equipment MAC address, equipment type, IP address, subnet mask and gateway address information.
4. The method of claim 3, wherein the step S4 further comprises: and the searching terminal identifies the response message, records the information of all the response DDC controllers by taking the MAC address as a unique identifier, forms an equipment list and presents the equipment list to the user.
5. The method of claim 4, wherein the step S5 further comprises: the user selects a DDC controller from the device list of the configuration software and modifies the IP address information in a point-to-point mode.
6. The method of claim 5, wherein the step S6 further comprises: and after receiving the configuration message, the DDC controller stores the configuration information and responds to the configuration software in a point-to-point mode.
7. The method of claim 1, wherein in step S1, the type of the "communication protocol" is 0x 8890.
8. The method of claim 1, wherein the method is based on the second layer of the TCP/IP protocol, the data link layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201911322118.5A CN111131435A (en) | 2019-12-19 | 2019-12-19 | Method for discovering and configuring Ethernet link layer equipment |
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| CN201911322118.5A CN111131435A (en) | 2019-12-19 | 2019-12-19 | Method for discovering and configuring Ethernet link layer equipment |
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| CN111885205A (en) * | 2020-08-05 | 2020-11-03 | 浙江源创建筑智能科技有限公司 | Method and system for cooperative work of distributed DDC (direct digital control) controllers |
| CN112073322A (en) * | 2020-09-18 | 2020-12-11 | 北京信而泰科技股份有限公司 | Discovery method and device of network tester |
| CN113111015A (en) * | 2021-03-30 | 2021-07-13 | 南京翼辉信息技术有限公司 | Driverless virtual equipment management method |
| CN114158036A (en) * | 2021-12-06 | 2022-03-08 | 成都飞鱼星科技股份有限公司 | Method, device, system and medium for configuring and managing AP |
| CN114422568A (en) * | 2021-12-27 | 2022-04-29 | 北京策腾教育科技集团有限公司 | Method, system, computer terminal and storage medium for quickly establishing communication connection |
| CN115426398A (en) * | 2022-10-27 | 2022-12-02 | 杭州海康威视数字技术股份有限公司 | Video Internet of things equipment safety discovery method and device based on multi-layer cooperation |
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| CN115426398A (en) * | 2022-10-27 | 2022-12-02 | 杭州海康威视数字技术股份有限公司 | Video Internet of things equipment safety discovery method and device based on multi-layer cooperation |
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Address after: 310053 room 2201, 22 / F, building 2, No. 307 Liuhe Road, Puyan street, Binjiang District, Hangzhou, Zhejiang Province Applicant after: Zhejiang Yuanchuang Intelligent Control Technology Co.,Ltd. Address before: Room 312-315, area D, 309 Liuhe Road, Binjiang District, Hangzhou City, Zhejiang Province, 310053 Applicant before: ZHEJIANG YUANCHUANG BUILDING INTELLIGENT TECHNOLOGY CO.,LTD. |
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Application publication date: 20200508 |