WO2011116614A1

WO2011116614A1 - Method, system and device for accessing network equipment

Info

Publication number: WO2011116614A1
Application number: PCT/CN2010/079779
Authority: WO
Inventors: 薛洋; 徐承浩
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-03-23
Filing date: 2010-12-14
Publication date: 2011-09-29
Also published as: CN102202103A

Abstract

The present invention discloses a method for accessing network equipment, which is used to improve the efficiency, security and execution of the process of accessing network equipment in prior art. The method includes that: a network equipment receives a multicast message sent by an access end in an arranged multicast group, wherein said multicast message includes a first temporary communication address of a local network card generated by the access end; said network equipment generates a second temporary communication address of a local network card according to the first temporary communication address in the received multicast message; wherein said second temporary communication address lies in the same network segment with said first temporary communication address; said network equipment establishes a communication link to communicate with said access end according to said second temporary communication address and first temporary communication address, and returns a link establishment message to said access end by said communication link, which enables said access end to access said network equipment by said communication link after said access end receives said link establishment message.

Description

Method, system and device for accessing network equipment

Technical field

The present invention relates to the field of network communication technologies, and in particular, to a method, system and device for accessing a network device.

Background technique

It is often necessary to configure or update information about some network devices in the LAN. For example: Configure the information of the readers newly added to the LAN. The general user can access the network device through the Graphic User Inferface (GUI) of the access terminal to implement maintenance and update of the network device. The access end is typically a local computer. The access process includes: the access terminal first discovers and establishes a communication link with the network device through the search operation, that is, the access terminal searches for the network device, obtains the address information of the network device, and establishes according to the local address information and the address information of the network device. A communication link with the network device, where the address is generally an Internet Protocol (IP) address, and then the network device is accessed through the communication link. The communication process between the access terminal and the network device is a one-to-many communication scenario.

Currently, one-to-many communication scenarios include: broadcast communication, or multicast communication. Among them, the host in the broadcast communication mode uses "a pair of all, the communication mode, the signal sent by each host, all other hosts in the local area network can receive. The scheme is simple and easy, with Strong operability, but because the range of broadcast transmission is uncontrollable, all network devices in the LAN will receive direct communication information from any other network device. As a result, information security is not guaranteed, and the load on the LAN is also increased.

Compared with the broadcast communication, the receiving object of the message in the multicast communication mode is limited to being a member of the multicast group, and the controllability is stronger. However, in the process of accessing the network device, the message of the search network device is received by all the network devices in the same multicast group, and the message for configuring or updating the information of the network device is sent and received for a single network device, which requires communication. The method can provide differentiated services, and the multicast communication method cannot provide such services.

In addition, for some instant messaging (IM) software in the LAN, For example: feiq, although after launching a search, you can get multiple communicable objects and select one of them for peer-to-peer communication. However, in a more complex network environment, such IM software does not guarantee the enforceability of operations. For example, when the access device and the network device are not on the same network segment as the local area network, that is, the IP address of the access terminal is different from the network address of the IP address of the network device. When the feiq is run on the access terminal of the different network segment, the local area network cannot be searched. The rest of the network devices, that is, the IP address of the network device cannot be obtained; or when there are conflicts between the IP addresses of multiple network devices in the LAN, there is no guarantee that all network devices with the same IP can be searched. The above situation is likely to occur when multiple network devices with completely random system information are simultaneously connected to the local area network, especially when starting the architecture device, it is a problem that must be considered.

In summary, the current network device access process has inconvenient inefficiency, low security, and poor enforceability.

Summary of the invention

It is an object of the present invention to provide a method of accessing a network device for improving the efficiency, security, and enforceability of a prior art network device access procedure.

An embodiment of the present invention provides a method for accessing a network device, including:

The network device receives the multicast message sent by the access terminal in the agreed multicast group, where the multicast message includes the first temporary communication address of the local network card generated by the access terminal;

The network device generates a second temporary communication address of the local network card according to the first temporary communication address in the received multicast message, where the second temporary communication address is in the same network segment as the first temporary communication address; as well as

The network device establishes a communication link that communicates with the access terminal according to the second temporary communication address and the first temporary communication address, and returns a link establishment message to the access terminal through the communication link, so that After the access terminal receives the link setup message, accessing the network device through the communication link.

The present invention also provides a system for accessing a network device, including: an access terminal and at least one network device, wherein the access terminal and the network device are in an agreed multicast group, where

The access terminal is configured to: generate a first temporary communication address of the local network card, and send the inclusion Transmitting the multicast message of the first temporary communication address to the agreed multicast group, and after receiving the link establishment message returned by the network device in the agreed multicast group through the corresponding communication link, passing the communication link Accessing the network device;

The network device is configured to: generate a second temporary communication address of the local network card according to the first temporary communication address in the received multicast message, where the second temporary communication address is the same as the first temporary communication address The network segment establishes a communication link with the access terminal according to the second temporary communication address and the first temporary communication address, and returns a link establishment message to the access terminal through the communication link.

The invention also provides an access terminal, comprising:

a generating unit configured to generate a first temporary communication address of the local network card;

a communication unit, configured to: send a multicast message to the agreed multicast group, where the multicast message includes the first temporary communication address, and, after receiving the network device in the agreed multicast group, After the link establishment message returned by the corresponding communication link, the network device is accessed through the communication link.

The invention also provides a network device, comprising:

a receiving unit, configured to receive a multicast message sent by the accessing end in the agreed multicast group, where the multicast message includes a first temporary communication address of the local network card generated by the accessing end;

a generating unit, configured to generate a second temporary communication address of the local network card according to the first temporary communication address in the multicast message received by the receiving unit, where the second temporary communication address and the first temporary communication address Same network segment; and

a link establishing unit configured to establish a communication link with the access terminal according to the second temporary communication address and the first temporary communication address, and return a link to the access terminal through the communication link Create a message. In the embodiment of the present invention, after accessing a network device with multiple IP addresses in the local area network, the method for accessing the network device according to the embodiment of the present invention may search for each network device at one time, and perform communication configuration operations separately. It does not depend on whether the network device and the access end are in the same network segment, and improves the efficiency of the network device access process; and, in the process of searching and configuring the entire network device, the communication link responsible for transmitting data is bound to the temporary of both parties. Communication address, guaranteed search operation Operability and ease of use. Compared with the broadcast communication mode and the pure multicast communication mode, the access scheme provided by the embodiment of the present invention does not generate redundant communication, minimizes the load of network transmission, and improves the execution efficiency of the search operation.

BRIEF abstract

1 is a flowchart of accessing a network device according to an embodiment of the present invention;

2 is a flowchart of accessing a network device according to Embodiment 1 of the present invention;

3 is a structural diagram of a system for accessing a network device according to an embodiment of the present invention;

4 is a structural diagram of an access end according to an embodiment of the present invention;

FIG. 5 is a structural diagram of a network device according to an embodiment of the present invention.

Preferred embodiment of the invention

In the embodiment of the present invention, the network device is applied to a device in the Internet, and the information of the device needs to be configured or updated, for example, a reader/writer in a local area network. There are one or more such network devices in the local area network. For the local area network, the address information of each network device, that is, the IP address, can be accessed. The access end may be in the same network segment as the searched network device, or the access terminal and the searched network device are in the same network segment of the local area network, and are in different network segments from the other network devices being searched.

In the embodiment of the present invention, after the access terminal and the network device to be searched join the agreed multicast group, the process of accessing the network device is shown in FIG. 1 , and includes:

Step 101: The access end generates a first temporary communication address of the local network card.

The access terminal determines a local network card according to the saved network connection information list, and then generates a first temporary communication address according to the set address generation scheme, and binds the first temporary communication address to the local network card. The first temporary communication address includes: an IP address of the temporary communication, and a subnet mask. The first temporary communication address is different from the actual communication address of the access terminal in the local area network.

In the set address generation scheme, the network number of the IP address of the temporary communication can be directly defined. And the number of subnet masks, and the host number of the IP address of the temporary communication can also be determined by a setting algorithm. The set address generation scheme includes: limiting the network number of the temporary communication IP address to the private address range, setting the number of the subnet mask to the default subnet mask number of each type of address or other subnet. The number of masks.

For example: The actual IP address of the access end in the LAN is 10.86.50.6, and the subnet mask is

255.255.255. 0, according to the set address generation scheme, the generated first temporary communication address includes: the IP address is 10.14.7.53, the mask is 255.255.0.0; or the generated first temporary communication address includes: IP address The ratio is 10.14.7.53 and the mask is 255.0.0.0.

The access end may have only one network card or multiple network cards. When there is only one network card on the access end, the saved network connection information list has only one network connection information, so that the network card corresponding to the network connection information is determined as the local network card. When there are multiple network cards on the access end, you need to select a network connection information in the saved network connection information list, and determine the network card corresponding to the network connection information as the local network card.

When the access terminal starts up, it can obtain network connection information, and then generate and save a list of network connection information according to the network connection information.

Step 102: The accessing end sends a multicast message to the agreed multicast group, where the multicast message includes the first temporary communication address. Both the access end and the network device being searched have joined a contracted multicast group, so that each network device in the agreed-upon group can receive the multicast message sent by the access terminal.

Step 103: The network device in the multicast group is configured to generate a second temporary communication address of the local network card according to the first temporary communication address in the received multicast message. The second temporary communication address and the first temporary communication address are in the same network segment, that is, the second temporary communication address and the first temporary communication address have the same network number.

Each network device in the agreed multicast group can receive the multicast message, so that each network device decodes the received multicast message to obtain the first temporary communication address, and then each network device is configured according to The set address generation scheme generates a second temporary communication address corresponding to the same network segment as the first temporary communication address, and binds the second temporary communication address to the local network card.

Here, the second temporary communication address also includes: an IP address of the temporary communication, and a subnet mask. In the set address generation scheme, directly defining the network number of the temporary communication IP address in the second temporary communication address is consistent with the network number of the temporarily communicated IP address in the first temporary communication address, and directly defining the subnet mask The number can also be determined by a setting algorithm to determine the host number of the IP address of the temporary communication.

In the embodiment of the present invention, the IP address of the temporary communication generated by each network device has independence and complete randomness, and there is a possibility that the temporary IP address generated by two or more network devices may collide, and the probability is received in the local area network. The number of multicast network devices is positively correlated and negatively related to the number of IP addresses in the LAN segment. For example: 253 network devices are connected to a Class C LAN segment, and the default subnet mask is used by the access terminal to be 24 bits, that is, 255.255.255.0. The collision probability of the IP address of the temporary communication generated by the network device at this time. It is 100%. Therefore, to solve this problem, you can relax the subnet mask of the IP address of the temporary communication of the access terminal and change it to 8 bits, that is, 255.0.0.0. At this time, the IP address of the temporary communication randomly generated by the network device is also 255.0. .0.0 is used as the subnet mask, so that it can be hashed within the range of 256 ³ , and the probability of generating temporary IP collisions is negligible under the order of hundreds of network devices. Therefore, in the preferred embodiment, the subnet mask can be defined as 255.0.0.0 in the set address generation scheme.

Step 104: The network device establishes a corresponding communication link with the access terminal according to the second temporary communication address and the first temporary communication address.

Each network device in the multicast group has generated a second temporary communication address of the local network card, so that each network device uses the second temporary communication address as a source address and the first temporary communication address as a target address. A communication link between the network device and the access terminal. Here, you can use the Transmission Control Protocol (TCP) chain-building operation.

Step 105: The network device returns a link establishment message to the access terminal through the corresponding communication link. The link establishment message includes: an actual communication address of the network device in the local area network and other related information.

After three times of handshake, the network device establishes a communication link with the access terminal, and returns a link establishment message through the communication link. The link setup message includes: the actual communication address of the network device in the local area network, that is, the link establishment message includes the actual IP address and subnet mask of the network device in the local area network. Of course, the link establishment message further includes information such as a network device identification number, a network device media access control (MAC) address, and a network device serial number. Step 106: After receiving the link establishment message, the accessing end accesses the network device through the corresponding communication link.

After receiving the link setup message, the access end obtains the actual communication address of the corresponding network device and other related information. Therefore, the access terminal operates on the GUI interface and accesses the network device through the corresponding communication link. Here, information may be read from the network device, or information may be written to the network device, thereby implementing configuration or update of the network device information.

Therefore, in the embodiment of the present invention, after the access end and the network device join the agreed multicast group, the network device receives the multicast message sent by the access end in the agreed multicast group, where the multicast message includes the local generated by the access end. a first temporary communication address of the network card; then, the network device generates a second temporary communication address of the local network card according to the first temporary communication address in the received multicast message, wherein the second temporary communication address is in communication with the first temporary communication address The address is in the same network segment; finally, the network device establishes a communication link with the access terminal according to the second temporary communication address and the first temporary communication address, and returns a link establishment message to the access terminal through the communication link, so that the access terminal After receiving the link setup message, the network device is accessed through the communication link.

In the embodiment of the present invention, the communication link established between the network device and the access terminal is in a long connection mode, and the access terminal and the network device periodically send heartbeat signals to independently maintain the communication link.

When the access terminal exits or the network device is removed from the local area network, the corresponding communication link will be broken. In addition, when the access end re-initiates the search operation, it will actively disconnect all current communication links established with the network device. When the network device receives the new multicast search information, the current link is disconnected and the current second temporary communication address is deleted. Therefore, in the embodiment of the present invention, the access terminal receives the chain returned by the network device through the corresponding communication link. After the road establishes the message, it includes:

After the communication link is disconnected, the corresponding network device deletes the corresponding second temporary communication address, where the communication link is disconnected, including: the access terminal or the network device exits the agreed multicast group, and the access terminal resends the multicast message. The network device receives one or more of the new multicast messages.

In the embodiment of the present invention, the system for accessing the network device includes: the access terminal and the at least one network device, and the access terminal and all the network devices are in the agreed multicast group, so that the process of accessing the network device includes:

The access end generates a first temporary communication address of the local network card, and sends a multicast message to the agreed multicast. The network device in the multicast group generates a second temporary communication address of the local network card according to the first temporary communication address in the received multicast message, where the second temporary communication address is in the same network segment as the first temporary communication address;

After the network device establishes a communication link with the access terminal according to the second temporary communication address and the first temporary communication address, returning a link establishment message to the access terminal through the communication link;

After receiving the link establishment message, the access terminal accesses the network device through the communication link.

The embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

Embodiment 1 In this embodiment, the network device is a reader/writer, and the access terminal and the reader/writer 1 reader/writer 2 reader/writer 3 jointly access the network, wherein the LAN gateway is 10.86.10.1; the IP address of the access terminal is

10.86.10.2, the mask is 255.255.255.0, the gateway is 10.86.10.1; the IP address of reader 1 is

10.86.10.3, the mask is 255.255.255.0, the gateway is 10.86.10.1; the IP address of reader 2 is 10.86.10.3, the mask is 255.255.255.0, the gateway is 10.86.10.1, ie reader 2 and read and write The communication address of the device 1 is exactly the same; the IP address of the reader 3 is 20.86.10.2, the mask is 255.255.255.0, and the gateway is 20.86.10.1, that is, the access terminal and the reader/writer 3 are in different network segments. The purpose of the visit is to obtain at the same time

The communication configuration information of the three readers is changed separately.

After the access terminal and the reader access the LAN, the pre-agreed multicast group is added for registration, and the IP address of the multicast group is 230.2.2.2. Referring to Figure 2, the process of accessing the reader includes:

Step 201: The access end acquires the local network connection, obtains the only available network card, and randomly generates the first temporary communication address according to the set address generation scheme.

Here, the network address of the IP address defining the temporary communication in the set address generation scheme is 10, and the netmask is 255.0.0.0. Therefore, among the generated first temporary communication addresses, the IP address is 10.14.3.69, and the subnet is masked. The code is 255.0.0.0. Add the first temporary mailing address to the only available network card.

The host number of the IP address of the temporary communication may be determined by a setting algorithm, for example: If the host number format is ABC, let each of the eight, B, and C randomly take an integer between 0 and 255, if the three are obtained. If the number is 0, then C=C+2, A and B are retrieved again. The three ABC integers form the ABC host number. If the first random ABC is 255, then C=C-2 , A, B and then re-take each time, ABC three integers constitute the ABC host number. Of course, the embodiment of the present invention does The method of setting the host number of the IP address of the temporary communication is not limited to this, and other similar methods are possible. Step 202: After the local end network card is bound, the access terminal sends a multicast message to the multicast group 230.2.2.2. The multicast message includes the first temporary communication address, the IP address is 10.14.3.69, and the subnet mask is 255.0. .0.0, and after that, locally listen to the pre-agreed reader link destination port (4088).

Step 203: Each reader receives a multicast message, and generates a second temporary communication address of the local network card according to the first temporary communication address of the multicast message, where each second temporary communication address is associated with the first temporary The communication address is on the same network segment.

The multicast address itself belongs to the class D address. After the multicast member joins, it can receive the message in the group. This is independent of whether the address is repeated across network segments. Therefore, all three readers receive the multicast message sent by the access terminal. After decoding the message body, the first temporary communication address of the access terminal is obtained, and the second temporary communication address of the same network segment is generated respectively. And add to their respective network card.

Here, the network address of the IP address defining the temporary communication in the set address generation scheme is 10, and the netmask is 255.0.0.0. Therefore, among the second temporary communication addresses generated by the reader/writer 1, the IP address: 10.251.33.81 Subnet mask: 255.0.0.0; The second temporary communication address generated by reader/writer 2, IP address: 10.41.30.159, subnet mask: 255.0.0.0; second temporary communication address generated by reader/writer 3. Medium, IP address: 10.70.20.50, Subnet mask: 255.0.0.0.

Step 204: After each reader is bound to the second temporary communication address generated by the local machine, the first temporary communication address is used as a target, a communication link with the access terminal is established, and a link establishment message is sent.

Here, after the reader/writer binds the second temporary communication address generated by the local machine, the TCP chain-building operation is performed with the target of 10.14.3.69: 4088. After the communication link is established through the three-way handshake, the reader reports the link establishment message. . The link establishment includes: information about the communication configuration that is in effect on the local machine, for example: the actual IP address and subnet mask of the reader in the local area network, the device identification number, the device MAC address, and the device serial number. Taking the reader 1 as an example, the reported content is 10.86.10.3 and the mask is 255.255.255.0, instead of 10.251.33.81 bound by the TCP link.

Step 205: After the access terminal listens to the link establishment message from port 4088, it decodes and displays it on the GUI interface to complete a successful reader search operation.

During the above search and establishment of the communication link, the access GUI does not display any information about the temporary communication addresses of both parties, so that the operator does not completely see the temporary communication addresses of both parties. Interview After the request end, the configuration message is sent and the reader returns the configuration response message, which is transmitted through the established communication link.

Of course, in the embodiment of the present invention, when the established communication link is disconnected, the corresponding reader/writer will delete the second temporary communication address of the local network card. For example: When the reader/writer 2 exits the local area network, the reader/writer 2 deletes the second temporary communication address in the local network card, that is, the IP address: 10.41.30.159, subnet mask: 255.0.0.0 j divided.

Referring to FIG. 3, in the embodiment of the present invention, a system for accessing a network device includes: an access terminal 100 and at least one network device 200, where the access terminal 100 and all network devices 200 are in an agreed-upon group, where

The access terminal 100 is configured to generate a first temporary communication address of the local network card, and send the multicast message to the agreed multicast group, and, after receiving the network device 200 in the agreed multicast group, return through the corresponding communication link. After the link setup message, the network device 200 is accessed through the communication link.

The network device 200 is configured to generate a second temporary communication address of the local network card according to the first temporary communication address in the received multicast message, where the second temporary communication address is in the same network segment as the first temporary communication address And establishing, according to the second temporary communication address and the first temporary communication address, a communication link that communicates with the access terminal 100, and returns a link establishment message to the access terminal 100 through the communication link.

The access terminal 100 determines a local network card according to the saved network connection information list, generates a first temporary communication address according to the set address generation scheme, and binds the first temporary communication address to the local network card.

The access terminal 100 is further configured to acquire network connection information of the access terminal 100 at startup, and generate and save a network connection information list according to the network connection information.

The network device 200 is configured to generate the second temporary communication address by: performing a decoding operation on the multicast message, acquiring a first temporary communication address, and generating and the first according to the set address generation scheme. The temporary communication address is the second temporary communication address of the network segment, and the second temporary communication address is bound to the local network card.

The network device 200 is further configured to delete the corresponding second temporary communication address after the communication link is disconnected, wherein the disconnection of the communication link comprises: the access terminal 100 or the network device 200 exiting The multicast group is configured, the access terminal 100 resends the multicast message, and the network device 200 receives one or more of the new multicast messages.

Referring to FIG. 4, the access end in the embodiment of the present invention includes: a generating unit 410 and a communication unit.

420.

The generating unit 410 is arranged to generate a first temporary communication address of the local network card.

The communication unit 420 is configured to send a multicast message to the agreed multicast group, where the multicast message includes the first temporary communication address, and after receiving the link establishment message returned by the network device through the corresponding communication link Accessing the network device through the communication link.

The generating unit 410 includes:

A subunit is determined which is arranged to determine a local network card based on the saved list of network connection information.

The binding subunit is configured to generate a first temporary communication address according to the set address generation scheme, and bind the first temporary communication address to the local network card determined by the determining subunit.

The access side also includes:

An obtaining unit, configured to obtain network connection information of the accessing end when starting.

And a saving unit configured to generate and save a list of network connection information according to the network connection information.

Referring to FIG. 5, the network device in the embodiment of the present invention includes: a receiving unit 510, a generating unit 520, and a link establishing unit 530.

The receiving unit 510 is configured to receive the multicast message sent by the accessing end in the agreed multicast group, where the multicast message includes the first temporary communication address of the local network card generated by the accessing end.

a generating unit 520, configured to generate a second temporary communication address of the local network card according to the first temporary communication address in the received multicast message, where the second temporary communication address is the same as the first temporary communication address network segment.

a link establishing unit 530, configured to establish a communication link with the access terminal according to the second temporary communication address and the first temporary communication address, and return a chain to the access terminal by using the communication link Road establishment message. The generating unit 510 includes:

Decoding a subunit, configured to perform a decoding operation on the multicast message to obtain a first temporary communication address;

a binding subunit, configured to generate a second temporary communication address in the same network segment as the first temporary communication address according to the set address generation scheme, and bind the second temporary communication address to the local network card .

The network device also includes:

a deleting unit, configured to delete the second temporary communication address after the communication link is disconnected, wherein the disconnecting the communication link comprises: the accessing end or the network device exiting the agreed multicast group The access end resends the multicast message, and the network device receives one or more of the new multicast messages.

In the embodiment of the present invention, the access end generates a first temporary communication address of the local network card, and sends a multicast message to the agreed multicast group, where each network device in the multicast group receives the first message according to the received multicast message. a temporary communication address, generating a second temporary communication address of the corresponding local network card, wherein each second temporary communication address is in the same network segment as the first temporary communication address; and each network device is in accordance with the corresponding second temporary After the communication address and the first temporary communication address establish a corresponding communication link with the access terminal, return a link establishment message to the access terminal through the communication link; the access end receives each link After the message is established, the corresponding network device is accessed through the communication link. In this way, after accessing a network device with multiple IP addresses in the local area network, the method for accessing the network device according to the embodiment of the present invention can search for each network device at a time and perform communication configuration operations separately, without relying on Whether the network device and the access end are in the same network segment; For the access terminal that accesses different networks by multiple network cards, the network card can be selected for the limited search operation to facilitate group management of the network device.

During the entire process of searching and configuring the network device, the communication link responsible for transmitting data is bound to the temporary communication address of both parties, and only the query and configuration data transmission between the access terminal and the network device is performed, and the operation is performed. After the completion, the communication link and temporary communication address are cleared. After the network device has established a communication link with the access terminal and is performing a business operation, the two operations are performed in parallel through respective communication links, thereby ensuring the operability and ease of use of the search operation. The access scheme provided by the embodiment of the present invention is not compared with the broadcast communication mode and the pure multicast communication mode. Redundant traffic is generated, which minimizes the load on the network transmission and improves the efficiency of the search operation. The spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and the modifications of the invention

Industrial applicability

Compared with the prior art, the present invention can search for each network device at a time and perform communication configuration operations separately, and does not depend on whether the network device and the access end are in the same network segment, thereby improving the efficiency of the network device access process; In the process of searching and configuring the network device, the communication link responsible for transmitting the data is bound to the temporary communication address of the two parties, which ensures the operability and ease of use of the search operation. The access provided by the embodiment of the present invention is provided. The solution does not generate redundant traffic, which minimizes the load on the network transmission and improves the efficiency of the search operation.

Claims

Claim

1. A method of accessing a network device, comprising:

2. The method of claim 1, further comprising: the accessing end generating a first temporary communication address of the local network card by:

Determining a local network card based on the saved list of network connection information;

According to the set address generation scheme, a first temporary communication address is generated, and the first temporary communication address is bound to the determined local network card.

The method of claim 1, wherein the step of generating, by the network device, the second temporary communication address of the local network card according to the first temporary communication address in the received multicast message comprises: Decoding the multicast message to obtain a first temporary communication address;

The network device generates a second temporary communication address on the same network segment as the first temporary communication address according to the set address generation scheme, and binds the second temporary communication address to the local network card.

The method of claim 1, after the step of the network device returning a link establishment message to the access terminal by using the communication link, further comprising:

After the communication link is disconnected, the network device deletes the second temporary communication address, where the communication link disconnection includes one or more of the following situations: the access terminal or the network device The standby device quits the agreed multicast group, the access terminal resends the multicast message, and the network device receives the new multicast message.

A system for accessing a network device, comprising: an access terminal and at least one network device, wherein the access terminal and the network device are in an agreed multicast group, where

The accessing end is configured to: generate a first temporary communication address of the local network card, and send a multicast message including the first temporary communication address to the agreed multicast group, and, in receiving the agreed multicast group After the network device returns a link establishment message through the communication link, accessing the network device through the communication link;

6. The system of claim 5, wherein

The access terminal is configured to generate a first temporary communication address of the local network card by: determining a local network card according to the saved network connection information list, generating a first temporary communication address according to the set address generation scheme, and The first temporary communication address is bound to the determined local network card.

7. The system of claim 5, wherein

The network device is configured to generate a second temporary communication address of the local network card by: performing a decoding operation on the received multicast message, acquiring a first temporary communication address, and generating a scheme according to the set address generation scheme. The first temporary communication address is the same as the second temporary communication address of the network segment, and the second temporary communication address is bound to the local network card.

8. The system of claim 5, wherein

The network device is further configured to delete the second temporary communication address after the communication link is disconnected, wherein the communication link disconnection comprises one or more of the following situations: Or the network device exits the agreed multicast group, the access end resends the multicast message, and the network device receives the new multicast message.

9. An access terminal, comprising:

a communication unit, configured to: send a multicast message to the agreed multicast group, where the multicast message includes the first temporary communication address, and, after receiving the network device in the agreed multicast group, After the link establishment message returned by the communication link, the network device is accessed through the communication link.

The access unit according to claim 9, wherein the generating unit comprises:

Determining a subunit, configured to determine a local network card according to the saved list of network connection information;

Binding subunit, which is set to generate a first temporary communication place according to a set address generation scheme

11. A network device, comprising:

a link establishing unit configured to establish a communication link with the access terminal according to the second temporary communication address and the first temporary communication address, and return a link to the access terminal through the communication link Create a message.

The network device according to claim 11, wherein the generating unit comprises: a decoding subunit configured to perform a decoding operation on the multicast message to obtain a first temporary communication address;

13. The network device of claim 11, further comprising: a deleting unit, configured to delete the second temporary communication address after the communication link is disconnected, wherein the communication link disconnection comprises one or more of the following situations: the access terminal or the network The device exits the agreed multicast group, the access end resends the multicast message, and the network device receives the new multicast message.