WO2015067157A1

WO2015067157A1 - Virtual local area network interface processing method and network device

Info

Publication number: WO2015067157A1
Application number: PCT/CN2014/090205
Authority: WO
Inventors: 唐小虎
Original assignee: 华为技术有限公司
Priority date: 2013-11-05
Filing date: 2014-11-04
Publication date: 2015-05-14
Also published as: CN104618209A

Abstract

Provided in an embodiment of the present invention are a virtual local area network (VLAN) interface processing method and network device, the VLAN interface processing method comprising: a second device receives a first notification message sent by a first device, the first notification message comprising an identifier set of VLANs established by the first device; the second device fixes an interface of the second device to the VLAN corresponding to the identifier contained in an identifier intersection, the identifier intersection being an intersection of the identifier set of the VLANs contained in the first notification message and the identifier set of VLANs established by the second device. The embodiment of the present invention enables reliable communication between a first device and a second device.

Description

Processing method and network device of virtual local area network interface

The present application claims priority to Chinese Patent Application No. 201310542254.1, entitled "Processing Method and Network Device for Virtual Local Area Network Interface", filed on November 5, 2013, the entire contents of which are incorporated herein by reference. In the application.

Technical field

The embodiments of the present invention relate to communication technologies, and in particular, to a method and a network device for processing a virtual local area network interface.

Background technique

In the Ethernet network, the virtual local area network (English: virtual local area network, or VLAN) is used to divide the broadcast domain and control the traffic broadcast. In order to enable the network device to work normally through the VLAN, it usually takes at least two steps: creating a VLAN; .

However, there are technical problems in the network where the fixed VLANs of the two network device interfaces are inaccurate and communication cannot be realized.

Summary of the invention

The invention provides a processing method and a network device of a virtual local area network interface.

A first aspect of the present invention provides a method for processing a virtual local area network interface, including:

Receiving, by the second device, a first notification message that is sent by the first device, where the first notification message includes an identifier set of the virtual local area network that the first device has created;

The second device fixes the interface of the second device to the virtual local area network corresponding to the identifier included in the identifier intersection, where the identifier intersection is an identifier set of the virtual local area network included in the first notification message, and the first The intersection between the set of identities of the virtual local area network that the second device has created.

In a first possible implementation manner of the first aspect, the second device, where the interface of the second device is fixed to the virtual local area network corresponding to the identifier included in the identifier intersection, includes:

Determining, by the second device, whether the virtual local area network corresponding to the identifier included in the identifier intersection is consistent with the virtual local area network on which the interface of the second device is fixed, and if not, according to the identifier intersection, the second device is The fixed virtual LAN of the interface is processed.

With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the second device performs, according to the identifier intersection, a virtual local area network with an interface fixed to the second device Processing, including the following:

And configuring, by the second device, the virtual local area network fixed by the interface of the second device according to the identifier included in the identifier intersection;

The second device sends an alert message;

The second device configures a virtual local area network fixed to the interface of the second device according to the identifier included in the identifier intersection, and the second device sends an alert message.

In conjunction with the second possible implementation of the first aspect, in a third possible implementation manner of the first aspect, the second device is configured to perform an interface to the second device according to the identifier included in the identifier intersection Fixed virtual LAN configuration, including:

The second device configures the virtual local area network fixed by the interface of the second device to be consistent with the virtual local area network corresponding to the identifier included in the identifier intersection;

or,

The second device reserves the virtual local area network corresponding to the identifier included in the identifier intersection, and deletes the virtual local area network corresponding to the identifier not included in the identifier intersection.

With reference to the first aspect, and the first possible implementation of the first aspect, to any one of the third possible implementation manners of the first aspect, in a fourth possible implementation manner of the first aspect, the method further includes:

The second device generates a second notification message, where the second notification message includes an identifier set of the virtual local area network that the second device has created, where the second device periodically generates the second notification message. Or the second device generates the second notification message when the created virtual local area network changes; wherein the generating the second notification message exceeds a preset duration, where the preset duration is Determining, by the second device, a difference between a current time and a sending time of the previous notification message;

The second device sends the second notification message to the first device.

A second aspect of the present invention provides a network device, including:

a receiving module, configured to receive a first notification message that is sent by the first device, where the notification message includes an identifier set of the virtual local area network that the first device has created;

a fixed module, configured to fix the interface to the virtual local area network corresponding to the identifier included in the identifier intersection, wherein the identifier intersection is an identifier set of the virtual local area network included in the first notification message and an identifier of the created virtual local area network The intersection between the collections.

In a first possible implementation of the second aspect, the fixed module is specifically configured to:

It is determined whether the virtual local area network corresponding to the identifier included in the identifier intersection is consistent with the virtual local area network whose interface is fixed. If not, the virtual local area network fixed by the interface is processed according to the identifier intersection.

With reference to the first possible implementation of the second aspect, in the second possible implementation manner of the second aspect, the fixed module is specifically used in the following manner:

Configuring a virtual local area network with a fixed interface according to the identifier included in the identifier intersection;

Send an alert message;

And configuring, according to the identifier included in the identifier intersection, a virtual local area network with a fixed interface, and issuing an alert message.

With reference to the second possible implementation of the second aspect, in a third possible implementation manner of the second aspect, the fixed module is specifically configured to:

Configuring the virtual local area network that is fixed by the interface to be consistent with the virtual local area network corresponding to the identifier included in the identifier intersection;

or,

The virtual local area network corresponding to the identifier included in the identifier intersection is reserved, and the virtual local area network corresponding to the identifier not included in the identifier intersection is deleted.

With reference to the second aspect, and the first possible implementation manner of the second aspect, to the third possible implementation manner of the second aspect, in a fourth possible implementation manner of the second aspect, the method further includes:

a generating module, configured to generate a second notification message, where the second notification message includes an identifier set of the created virtual local area network, where the second notification message is periodically generated; or, occurs in the created virtual local area network The second notification message is generated, wherein the generating the second notification message exceeds a preset duration, where the preset duration is a difference between determining a current time and a sending time of a previous notification message.

And a sending module, configured to send the notification message to the first device.

A third aspect of the present invention provides a network device, including:

A processor, an interface circuit, a memory and a bus, the processor, the interface circuit and the memory are connected by a bus and complete communication with each other.

The bus can be an industry standard architecture bus, an external device interconnect bus, or an extended industry standard architecture bus. The bus can be divided into an address bus, a data bus, a control bus, and the like.

The memory is for storing executable program code, the program code including computer operating instructions. The memory may include a high speed random access memory and may also include a non-volatile memory such as at least one disk storage.

The processor can be a central processing unit, or a specific integrated circuit, or one or more integrated circuits configured to implement embodiments of the present invention.

The processing method of the virtual local area network interface provided by the embodiment of the present invention is executed by the processor, and the method includes:

Receiving a notification message sent by the first device, where the notification message includes an identifier of a virtual local area network that the first device has created;

Determining an intersection between an identifier set of the virtual local area network included in the notification message and an identifier set of the created virtual local area network;

The interface is fixed to a virtual local area network corresponding to the identifier included in the identifier intersection.

Further, the interface is fixed to the virtual local area network corresponding to the identifier included in the identifier intersection, and includes:

Optionally, processing the virtual local area network fixed by the interface according to the identifier intersection, including:

Send an alert message;

Further, optionally, configuring the virtual local area network with the interface fixed according to the identifier included in the identifier intersection, including:

or,

Further, it also includes:

Generating a notification message, where the notification message includes an identifier of the created virtual local area network;

Sending the notification message to the first device, so that the first device determines an intersection between an identifier of the virtual local area network included in the notification message and an identifier of a virtual local area network that has been locally created by the first device, and The first device fixes an interface of the first device to a virtual local area network corresponding to the identifier included in the identifier intersection.

Optionally, generating a notification message, including:

Generating the notification message periodically;

or,

The notification message is generated when the created virtual local area network changes.

Specifically, when the created virtual local area network changes, the notification message is generated, including:

Determining whether the difference between the current time and the sending time of the previous notification message exceeds a preset duration;

The notification message is generated if the preset duration is exceeded.

In the present invention, for the second device, the identifier of the virtual local area network that the first device has created is notified by the first device, and the identifier of the virtual local area network created by the first device is intersected with the identifier of the virtual local area network created by the first device. Identifying the intersection, the second device can then fix the interface of the second device to the virtual local area network corresponding to the identifier included in the identifier intersection, whereby the interface of the second device and the interface of the first device can be accurately fixed The intersection of the virtual local area network created by the device, the second device may also notify the first device of the identifier of the virtual local area network created by the device, and the first device may take the virtual local area network identifier created by the second device and the identifier of the virtual local area network created by the second device. After the intersection, the identification intersection is obtained, and then the first device can fix the interface of the second device to the virtual local area network corresponding to the identifier included in the identifier intersection, thereby solving the inaccuracy of the virtual local area network fixed by the interface between the two devices. The problem is that communication is impossible.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are some embodiments of the present invention. Other drawings may also be obtained from those of ordinary skill in the art in view of the drawings.

1 is a flowchart of Embodiment 1 of a method for processing a virtual local area network interface according to the present invention;

2 is a schematic structural diagram of Embodiment 1 of a network device according to the present invention;

3 is a schematic structural diagram of Embodiment 2 of a network device according to the present invention;

FIG. 4 is a schematic structural diagram of Embodiment 2 of a network device according to the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly described in conjunction with the drawings in the embodiments of the present invention. Some embodiments, rather than all of the embodiments, are invented. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

FIG. 1 is a flowchart of Embodiment 1 of a method for processing a virtual local area network interface according to the present invention. As shown in FIG. 1 , the method in this embodiment may include:

Step 101: The second device receives, by using an interface of the second device, a first notification message that is sent by the first device, where the first notification message includes a set of identifiers of the virtual local area network that the first device has created.

Step 102: The second device fixes the interface of the second device to a virtual local area network corresponding to the identifier of the identifier intersection, where the identifier intersection is an identifier of the virtual local area network included in the first notification message. An intersection between the set of identifiers of the virtual local area networks created by the second device.

Specifically, the first device creation (English: create) virtual local area network means that the administrator creates the virtual local area network on the device by creating an instruction; the interface of the second device is fixed (English: fix) to the identification intersection. The VLAN corresponding to the identifier is configured by the administrator to add the interface of the device to the VLAN corresponding to the identifier included in the identifier intersection; wherein the identifier is fixed to the virtual local area network corresponding to the identifier included in the identifier intersection The interface of the second device is an interface that receives the first notification message sent by the first device. Generally, the first notification message includes a set of identifiers of all virtual local area networks that the first device has created.

The technical solution of this embodiment will be described below by way of an example.

In this example, the first device may be referred to as device A and the second device may be referred to as device B. The device A has created four VLANs. The identifiers of the four VLANs are, for example, {101-200, 301-400, 601-700, and 801-900}. The device B has created five VLANs and five VLANs. The set is, for example, {201-300, 301-400, 601-700, 701-800, 801-900}.

The device A may send a notification message to the device B, where the notification message may include a VLAN identifier set {101-200, 301-400, 601-700, 801-900}, and after receiving the notification message sent by the device A, the device B It can be known that device A has created VLANs with the identifiers 101-200, 301-400, 601-700, and 801-900. Then, device B can determine the identification set of the VLANs that device A has created {101-200, 301. -400, 601-700, 801-900} intersects with the identifier of the created VLAN identification set {201-300, 301-400, 601-700, 701-800, 801-900} by the device B itself, and the identifier intersection is {301-400, 601-700, 801-900}. That is, the device B can accurately know that it creates a VLAN with the identifiers of 301-400, 601-700, and 801-900 together with the device A. Therefore, the device B can connect it. The port is fixed in the VLAN corresponding to the identifier intersection {301-400, 601-700, 801-900}, so that communication can be performed in the VLAN corresponding to the device A in the identification intersection {301-400, 601-700, 801-900}. .

Similarly, device B can also send a notification message to device A, which can include a VLAN identifier set {201-300, 301-400, 601-700, 701-800, 801-900}, and device A receives After the notification message sent by the device B, it can be known that the device B has created the VLANs of the identifiers 201-300, 301-400, 601-700, 701-800, and 801-900; then, the device A can determine that the device B has The identified set of VLANs {201-300, 301-400, 601-700, 701-800, 801-900} and the set of VLAN IDs created by device A itself {101-200, 301-400, 601-700, The intersection of the logos of 801-900}, the intersection of the logos is also {301-400, 601-700, 801-900}. That is, the device A can accurately know that it creates a VLAN with the identifiers of 301-400, 601-700, and 801-900 together with the device B. Therefore, the device A can fix its interface to the identity intersection {301-400, 601. -700, 801-900} in the corresponding VLAN, so that it can communicate with the device B in the VLAN corresponding to the identification intersection {301-400, 601-700, 801-900}.

So far, the interfaces of device A and device B can accurately fix the intersection of the virtual local area networks created by the two devices, so that reliable communication can be performed between device A and device B.

In a specific implementation, the second device fixes the interface of the second device to the virtual local area network corresponding to the identifier included in the identifier intersection, which may be specifically:

The second device determines whether the virtual local area network corresponding to the identifier included in the identifier intersection is consistent with the virtual local area network whose interface of the second device is fixed, and if not, the interface of the second device is fixed according to the identifier intersection. The virtual LAN is processed.

Further, the second device processes the virtual local area network fixed by the interface of the second device according to the identifier intersection, and may be implemented in three manners:

Manner 1: The second device configures the virtual local area network fixed by the interface of the second device according to the identifier included in the identifier intersection;

In this manner, specifically, there are two implementations, where the second device configures the virtual local area network fixed by the interface of the second device to be consistent with the virtual local area network corresponding to the identifier included in the identifier intersection; or The second device reserves the virtual local area network corresponding to the identifier included in the identifier intersection, and deletes the virtual local area network corresponding to the identifier not included in the identifier intersection.

For example, the second device may be referred to as device B, and the VLAN ID of the interface of the device B is fixed, for example, 201-300, 301-400, 701-800, and 901-1000, and the identifier included in the identifier intersection is, for example, {301-400, 601-700, 801-900}, determined by device B, the interface of the device B has a fixed VLAN ID and identifier intersection The included identifiers are inconsistent. Then, the interface of the device B is corrected according to the identifier included in the identifier intersection, and the VLAN identifiers fixed by the interface of the modified device B are 301-400, 601-700, and 801-900, and the intersection with the identifier is Consistent. Alternatively, the identifiers 201-300, 701-800, and 901-1000 that do not belong to the identifier intersection {301-400, 601-700, and 801-900} are deleted in the VLAN in which the interface of the second device is fixed, and the modified processing is performed. The VLAN ID fixed on the interface of device B is 301-400.

Manner 2: The second device sends an alert message, so that the administrator manually corrects the virtual local area network corresponding to the identifier included in the identifier intersection according to the alarm prompt information to the virtual local area network corresponding to the identifier of the second device. .

Manner 3: The second device configures a virtual local area network fixed to the interface of the second device according to the identifier included in the identifier intersection, and the second device sends an alert message.

In this embodiment, for the second device, the identifier of the virtual local area network that the first device has created is notified by the first device, and the identifier of the virtual local area network created by the first device is intersected with the identifier of the virtual local area network created by the first device. Obtaining an identity intersection, and then the second device can fix the interface of the second device to the virtual local area network corresponding to the identifier included in the identifier intersection, whereby the interface of the second device and the interface of the first device can be accurately fixed. The intersection of the virtual local area network created by the two devices, the second device may also notify the first device of the identifier of the virtual local area network created by the second device, and the first device may identify the virtual local area network created by the second device and the identifier of the virtual local area network created by the second device. The intersection is obtained, and the identifier intersection is obtained. Then, the first device can fix the interface of the second device to the virtual local area network corresponding to the identifier included in the identifier intersection, thereby solving the virtual local area network fixed by the interface between the two devices. Accurate and unable to communicate problems.

Further, it also includes:

The second device sends the second notification message to the first device.

Specifically, the first device generates the notification message in two ways:

Manner 1: The first device periodically generates a notification message.

A person skilled in the art may preset a sending period of the notification message according to requirements, so that the second device periodically performs interface configuration according to the notification message sent by the first device.

Manner 2: The first device generates the notification message when the created virtual local area network changes.

In the second mode, the event triggering mode is adopted, that is, when the event that the VLAN changes, the first device can be triggered to generate the notification message. Compared with the first method, the second method can effectively save the transmission of unnecessary notification messages.

In the specific implementation, the second method may include:

The first device determines whether the difference between the current time and the sending time of the previous notification message exceeds a preset duration;

If the preset duration is exceeded, a notification message is generated.

Specifically, if the sending interval of every two notification messages is too small, the notification message is sent too frequently, which may bring the signaling load of the system. Therefore, the event that the first device changes in the current VLAN occurs. The time may be determined whether the current time and the sending time of the previous notification message have reached a preset time interval. Only when the time interval exceeds the preset time length, the notification message is generated according to the event that the current VLAN changes. Otherwise, Continue to wait for the preset duration to generate a notification message.

In this embodiment, the second device may generate the notification message periodically and when the created virtual local area network changes, and send the notification message to the first device, so that the first device can identify the virtual local area network created by itself and the second device. The identifier of the virtual local area network created by the device is taken as an intersection, and the intersection of the identifier is obtained, so that the first device fixes the interface of the first device to the virtual local area network corresponding to the identifier included in the identifier intersection, so that the interface of the first device can be made accurate. The intersection of the virtual local area networks created by the two devices is fixed to ensure reliable communication between the first device and the second device.

2 is a schematic structural diagram of Embodiment 1 of a network device according to the present invention. As shown in FIG. 2, the network device in this embodiment is the second device in the foregoing method embodiment shown in FIG.

The receiving module 201 is configured to receive a first notification message that is sent by the first device, where the first notification message includes an identifier set of the virtual local area network that the first device has created;

The fixed module 202 is configured to fix the interface to the virtual local area network corresponding to the identifier included in the identifier intersection, where the identifier intersection is an identifier set of the virtual local area network included in the first notification message and the created virtual local area network Identifies the intersection between the collections.

The device in this embodiment may be used to implement the technical solution of the method embodiment shown in FIG. 1 , and the implementation principle and technical effects are similar, and details are not described herein again.

Further, the fixing module 202 is specifically configured to:

Send an alert message;

Further, the module 202 is specifically configured to:

or,

Further, it also includes:

a generating module 203, configured to generate a second notification message, where the second notification message includes an identifier set of the created virtual local area network, where the second notification message is periodically generated; or, in the created virtual local area network When the change occurs, the second notification message is generated; wherein the generating the second notification message exceeds a preset duration, where the preset duration is a difference between determining a current time and a sending time of a previous notification message;

The sending module 204 is configured to send the notification message to the first device.

3 is a schematic structural diagram of Embodiment 2 of a network device according to the present invention. As shown in FIG. 3, the network device in this embodiment may further include: a generating module 303, a sending module, based on the structure of the network device shown in FIG. 304.

a generating module 303, configured to generate a second notification message, where the second notification message includes an identifier set of the created virtual local area network, where the second notification message is periodically generated; or, in the created virtual local area network When the change occurs, the second notification message is generated; wherein the generating the second notification message exceeds a preset duration, where the preset duration is a difference between determining a current time and a sending time of a previous notification message;

The sending module 304 is configured to send the notification message to the first device.

4 is a schematic structural diagram of Embodiment 2 of a network device according to the present invention. As shown in FIG. 4, the network device in this embodiment includes: a processor 401 and an interface circuit 402. The memory 403 and the bus 404 are also shown. The processor 401, the interface circuit 402, and the memory 403 are connected by a bus 404 and complete communication with each other.

The bus 404 can be an industry standard architecture (English: Industry Standard Architecture, ISA for short) bus, external device interconnection (English: Peripheral Component Interconnect, PCI for short) or internal integrated circuit (English: Inter-Integrated Circuit, short for :I2C) bus, etc. The bus 404 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 4, but it does not mean that there is only one bus or one type of bus.

The memory 403 is for storing executable program code, the program code including computer operating instructions. The memory 403 may be a volatile memory, such as a random-access memory (RAM), or a non-volatile memory (NVM). For example, read-only memory (English: read-only memory, ROM), flash memory (English: flash memory), hard disk (English: hard disk drive, HDD) or solid state drive (English: solid-state drive, referred to as SSD).

The processor 401 can be a central processing unit (English: central processing unit, abbreviated as: CPU).

The processor 401 may be configured to execute the processing method of the virtual local area network interface provided by the embodiment of the present invention by using an operation instruction or a program code stored in the memory 403, where the method includes:

The processor 401 receives the first notification message sent by the first device by using the interface circuit 402, where the first notification message includes an identifier set of the virtual local area network that the first device has created;

The processor 401 fixes the interface corresponding to the interface circuit 402 to the virtual local area network corresponding to the identifier included in the identifier intersection, wherein the identifier intersection is an identifier set of the virtual local area network included in the first notification message and the created virtual The intersection between the set of identifications of the local area network.

The processor 401 determines whether the virtual local area network corresponding to the identifier included in the identifier intersection is consistent with the virtual local area network whose interface is fixed. If not, the virtual local area network fixed by the interface is processed according to the identifier intersection.

Optionally, processing the fixed virtual local area network according to the identifier intersection, including the following:

The processor 401 configures a virtual local area network with an interface fixed according to the identifier included in the identifier intersection;

The processor 401 sends an alert message;

The processor 401 configures the virtual local area network fixed by the interface according to the identifier included in the identifier intersection and sends an alarm prompt message.

The processor 401 configures the interface-fixed virtual local area network to be consistent with the virtual local area network corresponding to the identifier included in the identifier intersection;

or,

The processor 401 reserves the virtual local area network corresponding to the identifier included in the identifier intersection, and deletes the virtual local area network corresponding to the identifier not included in the identifier intersection.

Further, it also includes:

The processor 401 generates a second notification message, where the second notification message includes an identifier set of the created virtual local area network, where the second notification message is periodically generated; or when the created virtual local area network changes And generating the second notification message, where the generating the second notification message exceeds a preset duration, where the preset duration is a difference between determining a current time and a sending time of a previous notification message;

The processor 401 transmits the notification message to the first device.

One of ordinary skill in the art will appreciate that all or a portion of the steps to implement the various method embodiments described above can be accomplished by a program instruction processor. The aforementioned program can be stored in a computer readable storage medium. The program, when executed, performs the steps including the foregoing method embodiments; and the foregoing storage medium includes various media that can store program codes, such as a RAM, a magnetic disk, or an optical disk.

Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that The technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the technical solutions of the embodiments of the present invention. range.

Claims

A method for processing a virtual local area network interface, comprising:

The second device receives the first notification message sent by the first device by using the interface of the second device, where the first notification message includes an identifier set of the virtual local area network that the first device has created;

The second device fixes the interface to a virtual local area network corresponding to the identifier included in the identifier intersection, wherein the identifier intersection is an identifier set of the virtual local area network included in the first notification message, and the second device is created. The intersection between the set of identities of the virtual local area network.
The method according to claim 1, wherein the second device fixes the interface to a virtual local area network corresponding to the identifier included in the identifier intersection, and includes:

The second device determines whether the virtual local area network corresponding to the identifier included in the identifier intersection is consistent with the virtual local area network whose interface is fixed. If not, the virtual local area network fixed by the interface is processed according to the identifier intersection.
The method according to claim 2, wherein the second device processes the virtual local area network fixed by the interface according to the identifier intersection, and includes the following:

The second device configures the virtual local area network fixed by the interface according to the identifier included in the identifier intersection;

The second device sends an alert message;

The second device configures a virtual local area network with an interface fixed according to the identifier included in the identifier intersection, and the second device sends an alert message.
The method according to claim 3, wherein the second device configures the virtual local area network fixed by the interface according to the identifier included in the identifier intersection, including:

The second device configures the virtual local area network fixed by the interface to be consistent with the virtual local area network corresponding to the identifier included in the identifier intersection;

or,

The second device reserves the virtual local area network corresponding to the identifier included in the identifier intersection, and deletes the virtual local area network corresponding to the identifier not included in the identifier intersection.
The method according to any one of claims 1 to 4, further comprising:

The second device generates a second notification message, where the second notification message includes an identifier set of the virtual local area network that the second device has created, where the second device periodically generates the second notification message. Or the second device generates the second notification message when the created virtual local area network changes;

The second device sends the second notification message to the first device.
A network device, comprising:

a receiving module, configured to receive, by using an interface of the network device, a first notification message sent by another device, where the first notification message includes an identifier set of a virtual local area network that the another device has created;

a fixed module, configured to fix the interface to a virtual local area network corresponding to the identifier included in the identifier intersection, where the identifier intersection is an identifier set of the virtual local area network included in the first notification message and the created virtual local area network The intersection between the set of logos.
The network device according to claim 6, wherein the fixing module is specifically configured to:

Determining whether the virtual local area network corresponding to the identifier included in the identifier intersection is consistent with the fixed virtual local area network of the interface, and if not, processing the virtual local area network fixed by the interface according to the identifier intersection.
The network device according to claim 7, wherein the fixed module is specifically used for the following:

And configuring, according to the identifier included in the identifier intersection, a virtual local area network fixed by the interface;

Send an alert message;

And configuring, according to the identifier included in the identifier intersection, the virtual local area network fixed by the interface, and issuing an alert message.
The network device according to claim 8, wherein the fixing module is specifically configured to:

Configuring the virtual local area network fixed by the interface to be consistent with the virtual local area network corresponding to the identifier included in the identifier intersection;

or,

The virtual local area network corresponding to the identifier included in the identifier intersection is reserved, and the virtual local area network corresponding to the identifier not included in the identifier intersection is deleted.
The network device according to any one of claims 6-9, further comprising:

a generating module, configured to generate a second notification message, where the second notification message includes an identifier set of the created virtual local area network, where the second notification message is periodically generated; or, occurs in the created virtual local area network Generating the second notification message when the change is made;

And a sending module, configured to send the notification message to the another device.
A network device, including:

a processor, an interface circuit, a memory and a bus, the processor, the interface circuit and the memory being connected by a bus;

The memory is for storing program code;

The processor is configured to invoke program code stored in the memory and execute according to the program code:

Receiving, by the interface of the network device, a notification message sent by another device, where the notification message includes an identifier of a virtual local area network that the another device has created;

Determining an intersection of identifiers, the intersection of the identifier set of the virtual local area network included in the notification message and the identifier set of the virtual local area network that the network device has created;

And fixing the interface to a virtual local area network corresponding to the identifier included in the identifier intersection.
The network device according to claim 11, wherein the fixing the interface to the virtual local area network corresponding to the identifier included in the identifier intersection comprises:

It is determined whether the virtual local area network corresponding to the identifier included in the identifier intersection is consistent with the virtual local area network whose interface is fixed. If not, the virtual local area network fixed by the interface is processed according to the identifier intersection.
The network device according to claim 12, wherein the processing of the fixed virtual local area network according to the identifier intersection comprises:

Configuring a virtual local area network with a fixed interface according to the identifier included in the identifier intersection;

Send an alert message;

And configuring, according to the identifier included in the identifier intersection, a virtual local area network with a fixed interface, and issuing an alert message.
The network device according to claim 13, wherein configuring the virtual local area network fixed by the interface according to the identifier included in the identifier intersection includes:

Configuring the virtual local area network that is fixed by the interface to be consistent with the virtual local area network corresponding to the identifier included in the identifier intersection;

or,

The virtual local area network corresponding to the identifier included in the identifier intersection is reserved, and the virtual local area network corresponding to the identifier not included in the identifier intersection is deleted.
The network device according to any one of claims 11 to 14, wherein the processor is further configured to execute according to the program code:

Generating a second notification message, where the second notification message includes an identifier of the created virtual local area network, where the processor periodically generates the second notification message; or the processor is in the created virtual Generating the second notification message when the local area network changes;

Sending the second notification message to the another device.