WO2022007749A1

WO2022007749A1 - Data transmission method and apparatus

Info

Publication number: WO2022007749A1
Application number: PCT/CN2021/104542
Authority: WO
Inventors: 黄正全
Original assignee: 华为技术有限公司
Priority date: 2020-07-09
Filing date: 2021-07-05
Publication date: 2022-01-13
Also published as: CN113923075A

Abstract

Disclosed are a data transmission method and apparatus. The method is applied to a first network device in a virtual extensible local area network (VXLAN). The method comprises: when a wireless terminal attempts to access a destination terminal by means of a wireless access device, a first network device receiving a first request message sent by the wireless access device, wherein the first request message comprises an identifier of the destination terminal, and both the wireless access device and a destination access device have a VTEP capability; determining, according to user access information, a destination access device corresponding to the destination terminal, and sending, to the wireless access device, a configuration parameter of a VXLAN data plane tunnel from the wireless access device to the destination access device; and obtaining the VXLAN data plane tunnel between the wireless access device and the destination access device according to an address of the destination access device carried in the configuration parameter. Therefore, the data access, which is implemented by a wireless terminal, to a destination access device by means of a wireless access device is realized.

Description

A data transmission method and device

This application claims the priority of the Chinese patent application with the application number 202010655369.1 and the invention titled "A method and device for data transmission" filed with the Chinese Patent Office on July 9, 2020, the entire contents of which are incorporated into this application by reference .

technical field

The present application relates to the field of communications, and in particular, to a data transmission method and device in a virtual scalable local area network.

Background technique

Virtual extensible local area network (VXLAN) technology is one of the virtual three-layer network (Network Virtualization over Layer 3, NVO3) standard technologies defined by the Internet Engineering Task Force (IETF). Specifically, a packet encapsulation method in which the media access control (Media Access Control, MAC) is placed (in) in the User Datagram Protocol (UDP) is used to encapsulate the Layer 2 packets with the Layer 3 protocol. Realize the expansion of the second-layer network within the scope of the third-layer, thereby improving the scale expansion capability of the network.

When VXLAN needs to include wireless access devices, how to construct VXLAN is a technical problem to be solved.

SUMMARY OF THE INVENTION

The present application provides a data transmission and sending method and apparatus for implementing VXLAN including wireless access equipment. The application discloses the following technical solutions:

In a first aspect, the present application provides a data transmission method, which can be applied to a first network device in a VXLAN. Specifically, the method includes: when a wireless terminal attempts to access a destination terminal through a wireless access device, the first A network device receives the first request message sent by the wireless access device, where the first request message includes the identifier of the destination terminal; the first network device determines the destination access device corresponding to the destination terminal according to the user access information, and sends the request to the destination terminal. The wireless access device sends configuration parameters of the VXLAN data plane tunnel from the wireless access device to the destination access device, where the configuration parameters include the address of the destination access device.

Wherein, both the destination access device and the wireless access device have the capability of serving as the VXLAN tunnel endpoint VTEP, and the above user access information includes the correspondence between the destination terminal and the destination access device.

In the method provided by this aspect, when the wireless terminal accesses the VXLAN through the wireless access device, through the request message sent by the wireless access device, the network device can, according to the identifier of the destination terminal in the request message and the user access information in the VXLAN, Determine the address of the destination access device, and deliver the address to the wireless access device, so as to obtain the VXLAN data plane tunnel between the wireless access device and the destination access device, so that the wireless terminal can connect through the wireless connection. Data access from the incoming device to the destination access device.

In addition, since both the destination access device and the wireless access device have the VTEP capability, when using the VXLAN data plane tunnel to transmit data, only one decapsulation operation of the VXLAN packet is required, which not only improves the forwarding of the VXLAN packet efficiency, but also relieve the performance pressure of the access device.

The above-mentioned destination access device may be an edge device in the VXLAN, or a border device. Specifically, when the destination access device is an edge device, obtain the first VXLAN data plane tunnel between the wireless access device and the destination access device; when the destination access device is an edge device, obtain the wireless access device The second VXLAN data plane tunnel between the device and the destination access device.

When the destination access device of the traffic is an edge device, such as AP2, the internal traffic is directly transmitted from the source access device AP1 to the edge device AP2 through the first VXLAN data plane, and then AP2 forwards the traffic to the corresponding terminal device. When the destination terminal of the traffic is an external network device and the destination access device is a border device, the traffic accessing the outside is directly transmitted from the wireless access device to the border device through the second VXLAN data plane, and then the traffic is transmitted to the VXLAN. outside.

In this method, whether it is external traffic transmission or internal traffic transmission, only one decapsulation operation of VXLAN packets is required in the VXLAN transmission process, thereby improving the forwarding efficiency of VXLAN packets. VXLAN data plane tunnels are automatically obtained on demand between edge devices and edge devices, simplifying configuration management.

Optionally, the identifier of the destination terminal is an address of the destination terminal, such as an IP address and/or a MAC address. Correspondingly, the above-mentioned correspondence includes: a correspondence between the address of the destination terminal and the address of the destination access device.

Optionally, the first network device is a core switch, and the core switch has the functions of a WAC and a VXLAN network controller.

Optionally, the first network device is a border device.

With reference to the first aspect, in a possible implementation manner of the first aspect, the first network device receiving the first request message sent by the wireless access device includes: the first network device receiving the first request message sent by the wireless access device using a CAPWAP channel In the first request message, further, the CAPWAP channel is a CAPWAP management channel, and the corresponding port number is 5246.

In this implementation manner, when the CAPWAP protocol is adopted, the CAPWAP management channel is used for the management information exchange between the wireless access device and the first network device on the one hand to realize the traditional WLAN management function; on the other hand, the CAPWAP management channel is used for The request message is transmitted between the first network device and the wireless access device, so as to realize the management function of the VXLAN.

Optionally, the first request message includes the address of the wireless terminal. Or, optionally, the first request message includes first user access information.

With reference to the first aspect, in another possible implementation manner of the first aspect, before the first network device receives the first request message sent by the wireless access device, the method further includes: the first network device receives a wireless access message from the WAC. Enter the address of the incoming device, and obtain the VXLAN control plane tunnel with the wireless access device according to the address of the wireless access device. Correspondingly, the above-mentioned first network device receiving the first request message sent by the wireless access device specifically includes: the first network device using the VXLAN control plane tunnel to receive the first request message sent by the wireless access device.

With reference to the first aspect, in another possible implementation manner of the first aspect, before the first network device determines the destination access device corresponding to the destination terminal according to the user access information, the method further includes: a first network device Receive the first user access information sent by the wireless access device, where the first user access information includes the correspondence between the wireless terminal and the wireless access device, and further, the correspondence is the address of the wireless terminal and the wireless access device. The correspondence between the addresses.

In this implementation, when a terminal device is connected to the VXLAN, each access device reports its own user access information to the first network device, which is managed by the first network device in a unified manner, thereby greatly reducing management and Synchronizing the complexity of user access information and simplifying the network architecture also simplifies management and resource configuration.

With reference to the first aspect, in yet another possible implementation manner of the first aspect, the above-mentioned first network device receiving the first user access information sent by the wireless access device specifically includes: the first network device uses a CAPWAP channel , or the VXLAN control plane tunnel receives the access information of the first user.

In this implementation manner, when the CAPWAP protocol is adopted, the CAPWAP management channel is used for the management information exchange between the wireless access device and the first network device on the one hand to realize the traditional WLAN management function; on the other hand, the CAPWAP management channel is used for The VXLAN user access information is transmitted and synchronized between the first network device and the wireless access device, thereby implementing the VXLAN management function.

In a second aspect, the present application provides another data transmission method, which can be applied to a wireless access device in VXLAN, such as a wireless access point AP. Specifically, the method includes:

When the wireless terminal attempts to access the destination terminal through the wireless access device, the wireless access device sends a first request message to the first network device, where the first request message includes the identifier of the destination terminal; the wireless access device receives the message sent by the first network device The configuration parameters of the VXLAN data plane tunnel, the configuration parameters include the address of the destination access device, and the wireless access device obtains the VXLAN data plane tunnel from the wireless access device to the destination access device according to the address of the destination access device, where , both the wireless access device and the destination access device have the ability to act as a VTEP.

In addition, the destination access device is an edge device or a border device in the VXLAN.

With reference to the second aspect, in a possible implementation manner of the second aspect, the wireless access device sending the first request message to the first network device includes: the wireless access device uses a CAPWAP channel to send the first request message to the first network device request message.

With reference to the second aspect, in another possible implementation manner of the second aspect, the wireless access device sending the first request message to the first network device includes: the wireless access device sends the first request message to the WAC by using the CAPWAP channel , the CAPWAP channel is a CAPWAP management channel.

With reference to the second aspect, in another possible implementation manner of the second aspect, before the wireless access device sends the first request message to the first network device, the method further includes: the wireless access device sends the first request message to the first network device. User access information, the first user access information includes the correspondence between the wireless terminal and the wireless access device.

Optionally, in the case that the first network device obtains the address of the wireless access device in advance, the first user access information only includes the address of the wireless terminal.

With reference to the second aspect, in another possible implementation manner of the second aspect, the wireless access device sends the first user access information to the first network device, including: the wireless access device uses a CAPWAP channel or a VXLAN control plane The tunnel sends the first user access information to the first network device. The CAPWAP channel is a CAPWAP management channel.

It should be noted that when the wireless access device is a traditional AP and only supports the CAPWAP protocol, the wireless access device uses the CAPWAP management channel to send the first request message and the first user access information; uses the CAPWAP data channel to send datagrams Arts. If the wireless access device supports both the CAPWAP protocol and the VXLAN tunnel transmission, the AP can use the CAPWAP management channel or the VXLAN control plane tunnel to transmit the first request message and the first user access information.

Optionally, the port number corresponding to the CAPWAP data channel is 5247.

Optionally, the identifier of the destination terminal is the address of the destination terminal.

In a third aspect, the present application also provides a data transmission method, which is applied to WAC in VXLAN. Specifically, the method includes: when a wireless terminal attempts to access a destination terminal through a wireless access device, the WAC receives wireless access The device uses the first request message sent by the first CAPWAP channel, and the first request message includes the identifier of the destination terminal; the WAC sends the second request message including the identifier of the destination terminal to the first network device; the WAC receives the transmission from the first network device The configuration parameters of the VXLAN data plane tunnel, the configuration parameters include the address of the destination access device; WAC obtains the VXLAN data plane tunnel from WAC to the destination access device according to the address of the destination access device; WAC uses the second CAPWAP channel to communicate with The wireless access device transmits data, and uses the VXLAN data plane tunnel to transmit data with the destination access device.

The first CAPWAP channel is a management channel, and the second CAPWAP channel is a data channel.

With reference to the third aspect, in a possible implementation manner of the third aspect, before the WAC receives the first request message sent by the wireless access device using the CAPWAP channel, the method further includes: the WAC receiving the wireless access device from the wireless access device using the CAPWAP channel. the address of the incoming device; the WAC sends the address of the wireless access device to the first network device; obtains the VXLAN control plane tunnel between the WAC and the first network device; the WAC sends the second request message including the destination terminal identifier to the first network device A network device includes: the WAC sends a second request message to the first network device by using a VXLAN control plane tunnel.

With reference to the third aspect, in another possible implementation manner of the third aspect, before the WAC receives the first request message sent by the wireless access device using the CAPWAP channel, the method further includes: the WAC receiving the first request message sent by the wireless access device using the CAPWAP channel. The first user access information, where the first user access information includes the correspondence between the wireless terminal and the wireless access device; the WAC sends the first user access information to the first network device.

In combination with the third aspect, in yet another possible implementation manner of the third aspect, the WAC uses the CAPWAP channel to transmit data with the wireless terminal, and uses the VXLAN data plane tunnel to transmit data to the destination access device, including: the WAC receives the wireless connection. The ingress device uses the CAPWAP channel to send the CAPWAP data packets; the WAC decapsulates the CAPWAP data packets to generate VXLAN data packets; the WAC uses the VXLAN data plane tunnel to send the VXLAN data packets to the destination access device.

In a fourth aspect, the present application also provides a data transmission device, the device includes at least one module, such as a receiving module, a processing module, and a sending module, and may also include other units and modules, such as a storage unit.

When the apparatus is the first network device in the VXLAN, the at least one module is used to implement the above-mentioned first aspect and the data transmission method in various implementation manners of the first aspect.

When the apparatus is a wireless access device in VXLAN, the at least one module is used to implement the above-mentioned second aspect and the data transmission method in various implementation manners of the second aspect.

When the device is a WAC in VXLAN, the at least one module is used to implement the above third aspect and the data transmission method in various implementation manners of the third aspect.

In a fifth aspect, the present application further provides a communication device, which is a device in a VXLAN. Specifically, the network device includes a processor and a memory, and the processor is coupled to the memory, and may also include a transceiver and the like. The memory is used to store computer program instructions; the processor is used to execute the program instructions stored in the memory, so that the network device executes the methods in the various implementation manners of the first aspect, the second aspect, and the third aspect. Transceivers are used to implement data transmission functions.

Specifically, when the communication device is the first network device, the transceiver is configured to receive the first request message sent by the wireless access device when the wireless terminal attempts to access the destination terminal through the wireless access device; the processor is used to determine the destination access device corresponding to the destination terminal according to the user access information; the transceiver is further configured to send the wireless access device to the destination terminal to the wireless access device Configuration parameters of the VXLAN data plane tunnel of the access device, where the configuration parameters include the address of the destination access device.

In addition, when the communication device is a wireless access device, the transceiver is configured to, when the wireless terminal attempts to access the destination terminal through the wireless access device, the wireless access device sends a first request message to the first network device is also used for the device to receive the configuration parameters of the VXLAN data plane tunnel sent by the first network device, the configuration parameters including the address of the destination access device; the processor is configured to access the device according to the destination end address to obtain the VXLAN data plane tunnel from the wireless access device to the destination access device.

In addition, when the communication device is a WAC, the transceiver is configured to, when the wireless terminal attempts to access the destination terminal through the wireless access device, receive the first request message sent by the wireless access device using the CAPWAP channel, and include The second request message identified by the destination terminal is sent to the first network device; it is also used to receive configuration parameters of the VXLAN data plane tunnel sent by the first network device, where the configuration parameters include the destination access device the address of.

a processor, configured to obtain the VXLAN data plane tunnel from the WAC to the destination access device according to the address of the destination access device; and use the CAPWAP channel to transmit data with the wireless access device, and Use the VXLAN data plane tunnel to transmit the data with the destination access device.

Optionally, the above-mentioned processor and memory can be integrated in a PCB board.

Optionally, the above-mentioned processor and memory may also be integrated in a chip circuit, and the chip circuit can implement the data transmission methods in the foregoing various implementation manners.

In a sixth aspect, the present application also provides a network system, such as a VXLAN system, the system includes network equipment and terminal equipment, the network equipment includes access switches, aggregation switches, core switches, WAC, VXLAN network controller, edge equipment, border equipment, etc. Further, the access switch includes wireless access equipment and wired access equipment, the terminal equipment includes wireless terminals and wired terminals, and the wireless terminals or wired terminals can be connected to the VXLAN through the access switch.

Furthermore, the network device may be the network device described in the fifth aspect; the structure of the terminal device may be the same as that of the network device in the fifth aspect.

Specifically, when a wireless terminal attempts to access the destination terminal through the wireless access device, the wireless access device sends a first request message to the first network device, where the first request message includes the identifier of the destination terminal, and the wireless access device sends a first request message to the first network device. The access device has the capability to act as a VTEP.

The first network device receives the first request message sent by the wireless access device, determines the destination access device corresponding to the destination terminal according to the user access information, and sends the configuration of the VXLAN data plane tunnel to the wireless access device The user access information includes the corresponding relationship between the destination terminal and the destination access device, and the destination access device also has the ability to act as a VTEP; the configuration parameters include the address of the destination access device.

The wireless access device receives the configuration parameters of the VXLAN data plane tunnel, obtains the VXLAN data plane tunnel from the wireless access device to the destination access device according to the address of the destination access device included therein, and uses the VXLAN data plane tunnel. Data plane tunnel for data transmission.

In addition, in another possible implementation manner, when the network system includes WAC, and the wireless access device only supports the CAPWAP protocol, that is, the traditional AP, the method is as follows:

When a wireless terminal attempts to access the destination terminal through the wireless access device, the wireless access device uses the first CAPWAP channel to send a first request message to the WAC, where the first request message includes the identifier of the destination terminal, and the wireless access device sends a first request message to the WAC by using the first CAPWAP channel. The incoming device has the capability of serving as a VTEP, and the first CAPWAP channel is a CAPWAP management channel.

The WAC receives the first request message sent by the wireless access device using the first CAPWAP channel, generates a second request message including the destination terminal identifier, and sends the second request message to the first network through the VXLAN control plane tunnel equipment.

The first network device receives the second request message from the WAC, determines the configuration parameters of the VXLAN data plane tunnel according to the second request message, and sends the configuration parameters to the WAC by using the VXLAN control plane tunnel, wherein the configuration parameters include The address of the destination access device, and the destination access device has the capability of serving as a VTEP.

The WAC receives the configuration parameter sent by the first network device, obtains the VXLAN data plane tunnel from the WAC to the destination access device according to the address of the destination access device; and uses the second CAPWAP channel to communicate with the destination access device. The wireless access device transmits data, and uses the VXLAN data plane tunnel to transmit the data with the destination access device, wherein the second CAPWAP channel is a CAPWAP data channel.

The method provided in this aspect utilizes WAC to manage and forward user access information, and obtains the VXLAN data plane tunnel between the destination access device and the WAC in the VXLAN, thereby realizing data transmission between the destination access device and the WAC , In addition, the original CAPWAP channel is still used to transmit data between WAC and wireless access devices, such as traditional APs, thus realizing data transmission between traditional APs and destination devices in VXLAN.

In a seventh aspect, the present application further provides a computer-readable storage medium, where instructions are stored in the storage medium, so that when the instructions are executed on a computer or a processor, they can be used to execute the foregoing first aspect and each of the first aspects. The method in this implementation manner, or the foregoing second aspect and the methods in various implementation manners of the second aspect, or the foregoing third aspect and the methods in various implementation manners of the third aspect may also be performed.

In addition, the present application also provides a computer program product, the computer program product includes computer instructions, when the instructions are executed by a computer or a processor, the methods in the various implementation manners of the first to third aspects can be implemented .

It should be noted that the beneficial effects corresponding to the technical solutions of the various implementation manners of the second aspect to the seventh aspect are the same as the beneficial effects of the foregoing first aspect and various implementation manners of the first aspect. For details, please refer to the foregoing first aspect. Aspects and descriptions of beneficial effects in various implementation manners of the first aspect will not be repeated.

Description of drawings

FIG. 1 is a schematic diagram of a WLAN centralized networking architecture provided by an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a channel forwarding data message according to an embodiment of the present application;

3 is a schematic structural diagram of a direct forwarding data message provided by an embodiment of the present application;

4 is a schematic structural diagram of a direct-connected WAC networking according to an embodiment of the present application;

FIG. 5 is a schematic structural diagram of an integrated WAC networking according to an embodiment of the present application;

FIG. 6 is a schematic structural diagram of a VXLAN model provided by an embodiment of the present application;

FIG. 7 is a schematic structural diagram of another VXLAN model provided by an embodiment of the present application;

8 is a signaling flowchart of a data transmission method provided by an embodiment of the present application;

9a is a schematic diagram of acquiring a VXLAN data plane tunnel according to an embodiment of the present application;

FIG. 9b is another schematic diagram of acquiring a VXLAN data plane tunnel according to an embodiment of the present application;

FIG. 10 is a schematic diagram of acquiring a VXLAN control plane network according to an embodiment of the present application;

FIG. 11 is a signaling flowchart of data transmission between an Edge device and an Edge device according to an embodiment of the present application;

12 is a signaling flow chart of data transmission between an Edge device and a Border device according to an embodiment of the present application;

13 is a schematic diagram of transmitting information using a CAPWAP management channel according to an embodiment of the present application;

14 is a schematic structural diagram of a control plane networking for wired and wireless intercommunication according to an embodiment of the present application;

15 is a schematic structural diagram of a data plane networking for wired and wireless intercommunication according to an embodiment of the application;

16 is a schematic diagram of a VXLAN architecture for independently deploying WAC according to an embodiment of the present application;

FIG. 17 is a schematic diagram of another VXLAN architecture for independently deploying WAC according to an embodiment of the present application;

FIG. 18 is a schematic structural diagram of control plane networking when WAC is independently deployed according to an embodiment of the present application;

FIG. 19 is a schematic structural diagram of another control plane networking when WAC is independently deployed according to an embodiment of the present application;

20 is a schematic structural diagram of another control plane networking for wired and wireless intercommunication provided by an embodiment of the present application;

FIG. 21 is a signaling flowchart of another data transmission method provided by an embodiment of the present application;

22 is a schematic structural diagram of a data plane networking in which a WAC is responsible for processing VXLAN according to an embodiment of the present application;

23 is a schematic structural diagram of obtaining a VXLAN control plane by multiplexing a CAPWAP channel according to an embodiment of the present application;

24 is a schematic structural diagram of a control plane networking using a controller according to an embodiment of the present application;

25 is a schematic structural diagram of a data plane networking using a controller according to an embodiment of the present application;

26 is a schematic structural diagram of a control plane networking for multiplexing CAPWAP channels according to an embodiment of the present application;

FIG. 27 is a schematic structural diagram of a data transmission apparatus provided by an embodiment of the present application;

FIG. 28 is a schematic structural diagram of a communication device provided by an embodiment of the present application;

FIG. 29 is a schematic structural diagram of a switch according to an embodiment of the present application.

detailed description

In order to make those skilled in the art better understand the technical solutions in the embodiments of the present application, the technical solutions in the embodiments of the present application are described in further detail below with reference to the accompanying drawings. Before describing the technical solutions of the embodiments of the present application, the application scenarios and related technical terms of the embodiments of the present application are first introduced with reference to the accompanying drawings.

Wireless local area network (WLAN) is an economical and efficient network access method. Through WLAN technology, users can easily access the wireless network and move freely within the coverage area of the wireless network, thus completely getting rid of the shackles of the wired network.

Enterprise WLAN networks usually adopt a centralized architecture, that is, an architecture in which a controller is combined with an access point (AP). For example, as shown in Figure 1, the controller supports the Controlling and Provisioning of Wireless Access Points. Wireless Access Points, CAPWAP) protocol communication, when a controller communicates with an AP using a CAPWAP channel, the controller is also called a wireless access controller (Wireless Access Controller, WAC). In addition, when the CAPWAP protocol is not used for communication between the controller and the AP, the controller is a kind of network controller.

Among them, WAC is responsible for the unified processing of security, control and management functions of all devices, such as mobility management, authentication, virtual local area network (VLAN) division, radio resource management, and packet forwarding. In addition, the WAC carries management flows (ie, management packets) and data flows (ie, data packets, sometimes also referred to as service packets or service flows). Among them, the management flow needs to be encapsulated in the CAPWAP management channel for transmission, and the data flow can be selected according to the actual situation whether to be encapsulated in the CAPWAP data channel for transmission. The AP is responsible for completing wireless radio access functions, including wireless signal transmission and detection response, data encryption and decryption, and data transmission confirmation.

The CAPWAP protocol is used to communicate between the AP and the WAC. The CAPWAP protocol defines the communication rules between the AP and the WAC. In order to realize the intercommunication between the AP and the WAC, the CAPWAP protocol provides a general encapsulation and transmission mechanism. WACs can be transmitted across a Layer 2 network or a Layer 3 network.

Specifically, the CAPWAP channel can be divided into two categories, namely, a CAPWAP data channel and a CAPWAP management channel. The CAPWAP data channel is used to carry protocol data packets between the AP and the AC, such as Ethernet protocol data packets. The CAPWAP management channel is used to implement remote AP configuration and WLAN network management. For example, the port number corresponding to the CAPWAP management channel is 5246, and the port number corresponding to the CAPWAP data channel is 5247.

In addition, in the CAPWAP data channel, according to whether the data flow is encapsulated in the CAPWAP data channel for forwarding, it can be divided into two forwarding modes: one is tunnel forwarding, and the other is direct forwarding.

The so-called tunnel forwarding, also called centralized forwarding, is usually used in scenarios where wireless user traffic is centrally controlled. It means that the AP forwards the data packet (or data packet) to the WAC through the CAPWAP data channel, and then the WAC uniformly forwards it. ) to transmit data packets. Similarly, data packets are transmitted between A8 and the WAC through another CAPWAP data channel (abbreviation: line 4). Among them, line 1 and line 4 are often used in scenarios where wireless user traffic is centrally controlled. In addition, control packets from A1 and A8 to core switch D1 are transmitted through the CAPWAP management channel. For example, the CAPWAP management channel between A1 and WAC is line 2, and the CAPWAP management channel between A8 and WAC is line 4.

The so-called direct forwarding, also known as local forwarding or distributed forwarding, means that the data packets (or data packets) are directly sent by the AP to the core switch without being forwarded by the WAC, and the data packets are not transmitted through the CAPWAP data channel, as shown in the figure. Line 1 and line 3 shown in 3, wherein line 1 is used to implement data transmission between A1 and the core switch, and line 3 is used to implement data transmission between A8 and the same core switch. In addition, line 2 and line 4 are used to transmit control packets, which are transmitted through the CAPWAP management channel, and need to be forwarded through WAC.

In addition, the deployment methods of WAC in a WLAN network are usually divided into side-mounted networking and direct-connected networking.

The so-called side-mounted networking means that the WAC is side-mounted in the existing network, and is generally deployed next to the core switch or aggregation switch, so as to realize the WLAN service management of the AP, as shown in the networks shown in Figure 2 and Figure 3. The structure belongs to the side-mounted networking. In a side-mounted network, the AP transmits data packets using either tunnel forwarding or direct forwarding. The core switch D1 or the aggregation switches C1/C2 may be a cluster switch system (cluster switch system, CSS), and each CSS includes at least one switch.

The so-called direct-connected networking, as shown in Figure 4, refers to the direct access to APs or small aggregation switches under the WAC. At this time, the functions of the WAC and the core switch, or the WAC and the aggregation switch, the data flow and management flow of the AP are summarized. All are forwarded and processed centrally by the aggregated WAC. In the direct-connected networking mode, a connection can be established between the AP and the WAC through the CAPWAP management channel, and the WAC can implement centralized configuration and management of all APs through the CAPWAP management channel.

The data flow between the AP and the WAC can either be transmitted through the CAPWAP data channel, that is, adopt the aforementioned tunnel forwarding mode, or can be directly forwarded by the AP to the WAC, that is, adopt the aforementioned direct forwarding mode. In the direct-connected networking, the WAC is naturally connected in series in the line, so the direct forwarding mode is mostly adopted, so that the wireless data can be forwarded locally on the AP.

In addition, according to the implementation of WAC, WAC is also divided into two types: separate and integrated WAC.

The so-called separate WAC, also known as the independent WAC, refers to the deployment of the WAC as an independent network device, which is usually used in the scenario of large-scale network or WLAN independent network construction. The networking mode can be either a side-mounted networking, as shown in Figure 2 or Figure 3, or a direct-connected networking, as shown in Figure 4.

The so-called integrated WAC refers to integrating the wireless management function of WAC in wired network devices, such as switches or routers, or in wired devices by means of plug-in cards. It is mainly used in wired or wireless unified construction and management scenarios. Its networking model is shown in Figure 5. It can be seen that the networking mode of the integrated WAC is similar to the direct-connected networking, and its wireless forwarding efficiency is improved compared with the side-mounted networking.

It should be noted that, in this embodiment, the side-mounted networking is used as an example for introduction, and the direct-connected networking is similar to it, so it will not be introduced separately.

As shown in FIG. 6 , it is a schematic structural diagram of a VXLAN according to this embodiment. Included in this VXLAN:

(1) Virtual access point (VAP): VAP is the service access point of VXLAN, which can access services based on VLAN network or packet flow encapsulation type.

(2) VXLAN Network Identifier (VNI): Similar to the VLAN ID in traditional networks, it is used to distinguish VXLAN network segments. Tenants in different VXLAN network segments cannot directly communicate on the Layer 2 network. A network can be divided into one or more VNIs. Among them, each VNI is composed of 24 bits, which can support up to 16M (mega) VXLAN network segments, and the Layer 2 network cannot be directly communicated between different VNIs.

(3) Broadcast domain (bridge domain, BD): Similar to the VLAN broadcast domain division method used in traditional networks, the broadcast domain division in VXLAN can be represented by BD (or BD ID). In VXLAN, VNIs are mapped to BDs in a 1:1 manner. A BD can represent a broadcast domain, and hosts in the same BD can communicate with each other on a Layer 2 network.

(4) VXLAN tunnel endpoints (vxlan tunnel endpoints, VTEP): VTEP can encapsulate and decapsulate VXLAN packets. In a VXLAN packet, the source IP address is the IP address of the source VTEP, and the destination IP address is the IP address of the destination VTEP. The IP addresses of a pair of VTEPs correspond to a VXLAN tunnel. After the source VTEP encapsulates the packet, the encapsulated packet is sent to the IP address of the destination VTEP through the VXLAN tunnel. The destination VTEP device receives the encapsulated packet and decapsulates the packet.

Among them, the encapsulation format process of the VXLAN message includes: the original frame (original L2 frame) is first added with a VXLAN frame header in the encapsulation process, and then encapsulated in the outer UDP frame header, and the IP and MAC addresses of the bearer network are used. By encapsulating it as an outer header, a VXLAN packet can be obtained.

The explanation of each field in the VXLAN frame header, the outer layer UDP frame header, the outer layer IP frame header, and the outer layer Ethernet frame header is shown in Table 1. The meaning of each field in the VXLAN packet will not be explained in detail here.

Table 1

(5) Network Virtualization Edge (NVE): NVE is a network entity that realizes the function of network virtualization. After the packets are encapsulated and forwarded by the NVE, a Layer 2 virtualized network can be established between the NVE and the NVE based on the Layer 3 basic network.

Similar to a traditional VLAN network, VXLAN also has intra-VXLAN mutual access and inter-VXLAN mutual access.

(6) The host (HOST) is a terminal device that can access the VXLAN through the VAP.

Similar to traditional VLAN networks, VXLAN also supports intra-VXLAN mutual access and inter-VXLAN mutual access.

Layer 2 gateway (L2 gateway): A layer 2 access device similar to a traditional network. In VXLAN, a layer 2 gateway is used to solve the problem of tenants accessing the VXLAN virtual network. The layer 2 gateway can also be used for the same VXLAN virtual network (VXLAN Fabric). network communication. As shown in Figure 6, the exchange traffic between HOST 1 and HOST 2 is within the same virtual network because the same VNI is used. Optionally, the VNI is 1000.

Layer 3 gateway (L3 gateway): Similar to traditional networks, users in different VLANs cannot directly communicate with each other at Layer 2. VXLANs and VXLANs between different VNIs and non-VXLANs cannot directly communicate with each other. In order to enable communication between different VXLANs and between VXLANs and non-VXLANs, the concept of VXLAN Layer 3 gateway is introduced. Layer 3 gateways are used for cross-subnet communication of VXLAN virtual networks and access to external networks. As shown in Figure 6, between HOST 1 and HOST 3 is the inter-network traffic, because the VNI used by each is different, for example, the VNI used by HOST 1 is 1000, and the VNI used by HOST 3 is 2000.

For ease of description and understanding, the embodiment of the present application converts the VXLAN structure shown in FIG. 6 into the VXLAN networking model shown in FIG. 7 . As shown in FIG. 7 , the VXLAN generally consists of two roles. An egress representing VXLAN, called a border, indicates that it is connected to an external network, usually a Layer 3 gateway in VXLAN, and its function is similar to the egress gateway of a traditional basic physical network. Another access representing VXLAN, called Edge, represents the part of VXLAN accessing end users, usually corresponding to VAP in VXLAN, and its function is similar to the access switch or AP in the basic physical network.

For the convenience of distinction and description, the basic physical network is usually referred to as an underlay network, and the virtualized network is referred to as an overlay network or Fabric. The border device and the edge device, or between the edge device and the edge device, are connected through VXLAN Fabric. External traffic is connected to the Edge device through the border device exit, as shown in line 1 in Figure 7, the data transmission between the Border device and access point A8 is external traffic transmission; internal traffic is transmitted between edge devices, as shown in Figure 7 The data transmission between access points A1 and A8 shown in line 2 is internal traffic transmission.

VXLAN can superimpose Layer 2 virtual network on any routeable network, and realize interworking within VXLAN through VXLAN gateway, and at the same time, it can also realize interworking with traditional non-VXLAN. VXLAN uses a packet encapsulation method in which Media Access Control (MAC) is placed in (in) User Datagram Protocol (UDP), referred to as "MAC in UDP", which converts Layer 2 packets into Layer 2 packets. Layer 2 protocol encapsulates to extend the Layer 2 network, so that Ethernet packets are encapsulated on Internet Protocol (IP) packets, and transmitted in the network through routing without paying attention to the MAC address of the virtual machine, and the routing network is not affected by the network. It has the ability of large-scale expansion, and the migration of virtual machines through the routing network is not limited by the network architecture.

In VXLAN, since the enabled AP only supports the VXALN data plane function and the VXLAN data encapsulation function, it does not support the VXALN control plane forwarding function, and the control plane forwarding still uses the CAPWAP channel to communicate with the WAC. VXLAN control plane tunnel between VXLAN edge devices. In the process of wireless traffic transmission, the AP at the traffic access end encapsulates the wireless traffic into the VXLAN of different VNIs according to the service set identifier (SSID), and the AP at the traffic egress end decapsulates the VXLAN traffic of different VNIs and passes the The corresponding SSID is sent to the wireless terminal. Among them, the access switch is equivalent to the relay gateway for the AP to access the VXLAN, and transmits wireless traffic in the VXLAN formed by the wired network.

As mentioned above, the current methods and processes for APs to obtain VXLAN tunnels are very complex, requiring a lot of coordination and synchronization among the WAC, AP, and various components in wired VXLAN (such as VXLAN network controllers, access switches), resulting in Management and operations also become difficult. At the same time, the forwarding of the data flow is also completed in stages, which makes the end-to-end forwarding process complicated and inefficient, and is also inconvenient for fault location and elimination.

Based on this, the technical solutions of the embodiments of the present application aim to provide a simple and effective method and system for an AP to support VXLAN. On the one hand, it can simplify the process of creating VXLAN by the AP, and on the other hand, it can also simplify the process of forwarding VXLAN traffic by the AP. Traffic forwarding efficiency.

In order to solve the technical problem, this embodiment provides a data transmission method, which can be applied to the VXLAN networking architecture shown in FIG. 7 , wherein the method can be executed by a network device in the VXLAN, such as a first network device, As shown in Figure 8, the method includes:

101: When a wireless terminal attempts to access a destination terminal through a wireless access device, a first network device receives a first request message sent by the wireless access device, where the first request message includes an identifier of the destination terminal.

Wherein, the first network device is a core switch, which has the function of a WAC and/or a VXLAN network controller. Among them, the VXLAN network controller is used for information synchronization and management.

In addition, the identifier of the destination terminal includes an address of the destination terminal, such as an IP address and a /MAC address, or further includes a serial number of the destination terminal, such as terminal 1.

Optionally, the first network device receives the first request message sent by the wireless access device through a CAPWAP channel or a VXLAN control plane tunnel.

102: The first network device determines, according to user access information, a destination access device corresponding to the destination terminal, where the user access information includes: a correspondence between the destination terminal and the destination access device relation.

Wherein, both the wireless access device and the destination access device have the capability of serving as a VXLAN tunnel endpoint VTEP. Specifically, VTEP can encapsulate and decapsulate VXLAN packets. After the wireless access device VTEP at the source end encapsulates the data packet, it sends it to the destination VTEP device through the VXLAN tunnel. The destination VTEP device receives the encapsulated data packet and decapsulates it to obtain the transmitted data.

In step 102, the corresponding relationship includes the corresponding relationship between the address of the destination terminal and the address of the destination access device, the first network device is based on the address of the destination terminal in the first request message, and the address of the destination terminal. The corresponding relationship between the address of the destination terminal and the address of the destination access device determines the address of the destination access device.

In addition, the user access information can be obtained in advance. When a terminal device accesses the VXLAN through an access device, the access device reports the address of the currently accessed terminal device to the first network device. The first network device receives and uniformly manages all user access information. Wherein, the access device includes wireless access device and wired access device. Optionally, the wireless access device is an AP.

Optionally, the first network device may receive the user access information by using a CAPWAP channel, or receive the user access information by using a VXLAN control plane tunnel. Further, the VXLAN includes a VXLAN control plane tunnel and a VXLAN data plane tunnel.

Specifically, the so-called VXLAN control plane tunnel, referred to as "VXLAN control plane", is mainly responsible for mutual notification of host information (usually part of terminal access information), VTEP discovery, etc. In short, it is to synchronize user access information and VXLAN Information such as the source end (address of the source VTEP) and the destination end (the address of the destination VTEP) of the forwarding path, so as to provide necessary information for obtaining the VXLAN data plane tunnel.

Usually, BGP (Border Gateway Protocol, Border Gateway Protocol) EVPN (Ethernet Virtual Private Network, Ethernet Virtual Private Network) or LISP (Locator ID Separation Protocol, Location and Identity Separation Protocol) is used as the VXLAN control plane communication protocol, the sender ( For example, the Border device) contains the VTEP address and host information in the protocol packet, and the receiving end (such as the AP) obtains the VTEP address and host information of the communication peer by parsing these protocol packets.

Further, EVPN is a VPN technology used for Layer 2 network interconnection. EVPN technology adopts a mechanism similar to BGP/MPLS IP VPN, and defines a new Network Layer Reachability Information (NLRI) on the basis of BGP protocol, namely EVPN NLRI, in which EVPN NLRI defines several new The BGP EVPN route type is used to learn and advertise MAC addresses between different sites on a Layer 2 network.

In addition, LISP is essentially an IPinIP protocol. LISP proposes to distinguish and superimpose the IP that identifies the Locator and the IP that identifies the destination node ID. During public network transmission, only the Locator IP is forwarded. Only when it reaches the edge of the site, the outer IP will be stripped, and the inner IP of the EID will be used. forward. Wherein, the IP of the Locator is a routing locator (Routing Locator, RLOC), and the IP of the destination node ID may be an endpoint identifier (Endpoint Identifier, EID).

To sum up, EVPN defines several new BGP EVPN routes by extending the BGP protocol. These BGP EVPN routes can be used to transmit VTEP addresses and host information. Therefore, when EVPN is applied to VXLAN networks, it can enable VTEP to discover and learn host information from The data plane is transferred to the control plane, that is, a VXLAN data plane tunnel is generated.

The so-called VXLAN data plane tunnel, referred to as "VXLAN data plane" or "VXLAN forwarding plane", actually refers to the traditional VXLAN tunnel, which is mainly responsible for the forwarding of data packets and transmits VXLAN data packets from the source to the destination. Wherein, the VXLAN data message is generated by encapsulating data packets or data messages. In a VXLAN data packet, the source IP address is the IP address of the source VTEP, and the destination IP address is the IP address of the destination VTEP. A pair of VTEP addresses corresponds to a VXLAN data plane tunnel. After the source end encapsulates the packet, the encapsulated packet is sent to the destination VTEP through the VXLAN data plane tunnel, and the destination VTEP decapsulates the encapsulated packet after receiving the packet.

103: The first network device sends, to the wireless access device, configuration parameters of the VXLAN data plane tunnel from the wireless access device to the destination access device, where the configuration parameters include the configuration parameters of the destination access device. address.

Correspondingly, the wireless access device receives the configuration parameters of the VXLAN data plane tunnel, uses the address of the destination access device in the configuration parameters as the destination source VTEP address, and determines route forwarding with the destination access device. information, thereby obtaining the VXLAN data plane tunnel between the wireless access device and the destination access device.

The destination access device may be an Edge device or a Border device. When the destination access device is an edge device, such as the AP shown in Figure 9a, the VXLAN data plane tunnel between the edge device and the edge device is obtained according to the configuration parameters, thereby realizing the data exchange between the edge devices. transmission. When the destination access device is a Border device, such as the core switch shown in Figure 9b, the VXLAN data plane tunnel between the Edge device and the Border device is obtained according to the configuration parameters, thereby realizing the connection between the Edge device and the Border device. Data transfer between Border devices.

In the method provided in this embodiment, when the wireless terminal accesses the VXLAN through the wireless access device, through the request message sent by the wireless access device, the network device can access the VXLAN according to the identifier of the destination terminal in the request message and the user in the VXLAN. The information determines the address of the destination access device, and delivers the address to the wireless access device, thereby obtaining the VXLAN data plane tunnel between the wireless access device and the destination access device, realizing the wireless access device. Data communication with edge devices or edge devices in VXLAN.

In addition, since both the destination access device and the wireless access device have the VTEP capability, when using the VXLAN data plane tunnel to transmit data, it is avoided to forward the data in stages. The data transmission efficiency is improved, and the performance pressure of the access device is relieved.

The technical solutions provided by the embodiments of the present application are described in detail below.

Example 1

To simplify the description, the technical solution of this embodiment may adopt the networking architecture shown in FIG. 10 . Referring to FIG. 10 , the VXLAN includes a Border device and an Edge device. The Border device integrates all the functions of the WAC, and the Edge device is a Wireless access devices, such as APs, each AP is associated with at least one terminal device. The Border device is used to uniformly manage VXLAN user access information, and synchronize it to each AP as needed, so as to obtain VXLAN data plane tunnels between different APs.

The Border device may be a core switch, and the Edge device may be a wired access device, such as an access switch or an aggregation switch, or the Edge device may also be a wireless access device, such as an AP. In this embodiment, the Edge device is a wireless access device AP, and the AP has the capability of serving as a VXLAN tunnel endpoint VTEP.

In the networking architecture shown in Figure 8, the Border device integrates the functions of WAC, VXLAN network controller and core switch. Understandably, the Border device may be referred to as a core switch, and the core switch integrates the functions of the WAC and the VXLAN network controller. For the convenience of distinction, in this embodiment, the core switch (ie, the Border device) integrated with the functions of the WAC and VXLAN network controllers is referred to as a "first network device".

In this embodiment, it is assumed that each terminal accesses the VXLAN through an access device, for example, a wireless terminal accesses the VXLAN through the wireless access device AP1. The wireless terminal is a source terminal, AP1 is a source access device, and the source access device is a wireless access device. The destination terminal requested to be accessed by the source terminal may be a wireless terminal or a wired terminal, and the destination terminal is connected to the VXLAN through the destination access device, and the destination access device may be A wired access device can also be a wireless access device. In order to realize data traffic access between the source terminal and the destination terminal, this embodiment provides a data transmission method. As shown in FIG. 11 , the method includes:

200: The first access point AP1 obtains a VXLAN control plane tunnel with the first network device.

Specifically, AP1 sends a broadcast message, and after receiving the broadcast message, the first network device feeds back the address of the first network device, such as an IP address and/or a MAC address, to AP1. After AP1 receives the address sent by the first network device , according to the address of the VXLAN control plane tunnel, as shown in Figure 10.

201: When the wireless terminal UE1 accesses the VXLAN through the AP1, the AP1 sends the first user access information to the first network device by using the VXLAN control plane tunnel. Correspondingly, the first network device receives the first user access information sent by AP1.

Wherein, the first user access information includes the correspondence between the wireless terminal and the wireless access device, for example, the first user access information includes the correspondence between UE1 and AP1, and further includes the correspondence between UE1 and AP1. The correspondence between the address and the address of AP1.

Or, in another possible implementation manner, the first user access information only includes the address of the wireless terminal, for example, includes the IP address and/or the MAC address of the UE1. Specifically, when the UE1 is connected to the VXLAN through the AP1, the first user access information reported by the AP1 includes the IP address and/or the MAC address of the UE1.

Moreover, before UE1 accesses the VXLAN, it also includes: AP1 registers with VXLAN, that is, AP1 registers its own related information, such as AP1's IP address, MAC address, and AP's identity, into the first network device. Therefore, in step 201, AP1 only needs to report the first user access information carrying the address content of UE1 to the first network device, and after the first network device receives the first user access information including the address of UE1, The corresponding relationship between the wireless terminal UE1 and the wireless access device AP1 can be established, so in this embodiment, the AP1 does not need to report the address of the AP1 to the first network device.

It should be understood that, in this embodiment, other access devices in the VXLAN, including wired or wireless access devices, are also registered with the first network device, that is, the first network device obtains all access switches that have been registered in the VXLAN and The address of the AP.

Similarly, if there are other terminals accessing the VXLAN, the APs associated with these terminals also report the access information of each user to the first network device through the VXLAN control plane tunnel. For example, when UE2 connects to the VXLAN through the second access point AP2, AP2 sends second user access information to the first network device through another VXLAN control plane tunnel, where the second user access information includes The correspondence between the address of UE2 and the address of AP2, or including the address of UE2.

After receiving the first user access information from AP1, the second user access information from AP2, and possibly user access information reported by other APs, the first network device uniformly manages these user access information. In addition, AP1, AP2 and all other edge devices acquire user access information of the destination terminal from the first network device as needed. For example, according to the first user access information, the first network device learns that the UE1 accesses the VXLAN through the AP1 and the address of the UE1, thereby establishing a correspondence between the address of the UE1 and the address of the AP1. Similarly, according to the second user access information, it is known that the UE2 accesses the VXLAN, and the address of the UE2 is obtained, thereby establishing a correspondence between the address of the UE2 and the address of the AP2.

202: When the UE1 attempts to access the destination terminal, the AP1 sends a first request message to the first network device, where the first request message includes the identifier of the destination terminal. Correspondingly, the first network device receives the first request message sent by the AP1.

The identifier of the destination terminal may be an address of the destination terminal, such as an IP address or a MAC address.

Optionally, AP1 uses the VXLAN control plane tunnel in step 200 to send the first request message.

203: The first network device sends configuration parameters of the VXLAN data plane tunnel to AP1, where the configuration parameters of the VXLAN data plane tunnel include the address of the destination access device. Correspondingly, AP1 receives the configuration parameter sent by the first network device.

Specifically, after receiving the first request message, the first network device determines the destination terminal according to the address of the destination terminal carried in the first request message and the access information of all users in the VXLAN in step 201 above. The address of the destination access device is sent to AP1 through the VXLAN configuration parameter.

For example, the first network device determines that the destination access device is AP2 according to the user access information reported by all APs and the identifier of the destination terminal is the IP address of UE2, because in the second user access information reported by AP2 Indicate that UE2 has a corresponding relationship with AP2; then send the address of AP2 to AP1 through a first response message. The AP2 is an edge device, and the address of the AP2 is at least one of an IP address or a MAC address of the AP2.

204: AP1 obtains a first VXLAN data plane tunnel with the destination access device according to the address of the destination access device.

Specifically, AP1 uses the address of the destination access device as the destination source VTEP address, and determines routing and forwarding information between AP1 and the destination access device, thereby acquiring the first VXLAN data plane tunnel.

Wherein, when AP1 has stored the routing forwarding information to the destination VTEP address, it selects the corresponding VXLAN data plane tunnel and the corresponding VNI, and the selected VXLAN data plane tunnel is the first VXLAN data plane tunnel. When AP1 does not have routing forwarding information to reach the destination VTEP, it creates relevant routing forwarding information, that is, creates a VXLAN data plane tunnel and binds the corresponding VNI, and obtains the VXLAN data plane tunnel.

205: AP1 uses the first VXLAN data plane tunnel to transmit data with the destination access device.

Wherein, the data is a VXLAN message formed by encapsulating the data packet or data message once. Specifically, after the AP1 encapsulates the data packet into a VXLAN packet, the VXLAN packet is sent to the destination access device, such as AP2, through the first VXLAN data plane tunnel.

Correspondingly, after receiving the VXLAN packet sent by AP1 through the first VXLAN data plane tunnel, AP2 decapsulates the VXLAN packet to obtain original data, and then transmits the original data to the destination terminal associated with AP2.

It should be noted that when the destination access device is associated with two or more terminal devices, as long as the address of the destination access device is determined according to the configuration parameters, the wireless access device is obtained to the destination access device. the first VXLAN data plane tunnel, and use the first VXLAN data plane tunnel to transmit data.

When the traffic destination access device is an edge device, as shown in Figure 9a, such as AP2, the internal traffic is directly transmitted from the source access device AP1 to the peer edge device AP2 through the first VXLAN data plane tunnel, and then sent to the peer edge device AP2. AP2 forwards the traffic to the corresponding terminal device.

In the method provided in this embodiment, when a terminal device accesses the VXLAN, each access device reports its user access information to the first network device, and the first network device manages it uniformly, thereby greatly reducing the The complexity of managing and synchronizing user access information simplifies the network architecture and simplifies management and resource configuration. For example, when the wireless terminal UE1 accesses the VXLAN through the wireless access device AP1, AP1 reports the user access information of UE1 to the first network device, and obtains the address of the traffic destination access device AP2 through a request, so as to obtain VXLAN data plane tunnel between AP2 and AP2, and use the VXLAN data plane tunnel to realize data transmission between AP1 and AP2. It avoids data forwarding in stages, and the destination access device AP2 only needs to decapsulate the data packet once, which not only improves the transmission efficiency, but also relieves the performance pressure of the access switch AP.

This embodiment introduces the process of establishing a VXLAN data plane tunnel between two edge devices (AP1 and AP2) and transmitting data through the tunnel. In addition, it may also include establishing a VXLAN data plane tunnel between an edge device and a border device and then transferring data through the tunnel. Complete the process of data transfer.

Specifically, as shown in FIG. 12 , when the destination terminal is an external network device, and the external network device is connected to the VXLAN through a Border device, the destination access device is the Border device. This implementation In the example where the Border device is the first network device, in the above step 202, the first request message includes the identifier of the external network device. The above step 203 is replaced with:

203': The first network device sends configuration parameters of the VXLAN data plane tunnel to AP1, where the configuration parameters include the address of the first network device. Correspondingly, AP1 receives the configuration parameter sent by the first network device.

204': AP1 obtains a second VXLAN data plane tunnel with the first network device according to the address of the first network device. The address of the first network device includes an IP address and/or a MAC address of the first network device.

The specific process is the same as the foregoing step 204, and is not described in detail here.

205': AP1 uses the second VXLAN data plane tunnel to perform data transmission with the first network device.

In this embodiment, when the destination terminal is an external network device and the traffic destination access device is a Border device, as shown in Figure 9b, the traffic accessing the outside is directly transmitted from AP1 to the Border through the second VXLAN data plane tunnel device, which in turn passes traffic out of VXLAN.

In the method provided in this embodiment, whether it is external traffic transmission or internal traffic transmission, only one decapsulation operation of the VXLAN packet is required in the VXLAN transmission process, thereby improving the forwarding efficiency of the VXLAN packet. At the same time, the two Between edge devices, and between edge devices and border devices, VXLAN data plane tunnels are automatically established on demand, simplifying configuration management.

Optionally, if the wireless access device AP1 supports the CAPWAP protocol, the first network device may transmit the relevant information by using the CAPWAP management channel with the AP1. Specifically, as shown in FIG. 13, the above step 201 includes: 201': AP1 sends the first user access information to the first network device through the CAPWAP management channel.

Specifically, the CAPWAP protocol defines a communication rule between a wireless access point (such as an AP) and the WAC, and provides a general encapsulation and transmission mechanism for realizing the interoperability between the AP and the WAC. The CAPWAP channel includes a CAPWAP data channel and a CAPWAP management channel. Further, the CAPWAP data channel is used to carry 802.3 protocol packets between the AP and the WAC; the CAPWAP management channel is used to implement remote AP configuration and WLAN or VXLAN management.

In this embodiment, when the CAPWAP protocol is adopted, on the one hand, the CAPWAP management channel is used for the management information exchange between the AP and the first network device to realize the traditional WLAN management function; VXLAN user access information is transmitted and synchronized between APs to implement the VXLAN management function.

In addition, in the above step 202, the AP1 may also send the first request message to the first network device by using the CAPWAP management channel. Correspondingly, in step 203, the first network device sends the configuration parameters of the VXLAN data plane tunnel to the AP1 by using the CAPWAP management channel.

It should be noted that the aforementioned destination access device and the destination terminal may be connected by wire. For example, as shown in FIG. 14 , the access switch and the wired terminal are connected by wire, and the wired terminal is a computer. Alternatively, the destination access device and the destination terminal may also be connected wirelessly, for example, through a WLAN wireless connection, and the specific connection manner is not limited in this embodiment.

As shown in FIG. 15 , in this embodiment, when there is a wired or wireless connection to VXLAN, the source access device AP1 can directly obtain the VXLAN data plane tunnel with the destination access device AP2, so as to realize the interconnection of wired and wireless networks.

Embodiment 2

In this embodiment, the first network device is a Border device, and the Border device includes a VXLAN network controller, but does not include a WAC, and the WAC is deployed in the VXLAN as a separate device, where the WAC is used to process wireless user access information , WAC supports synchronizing AP related information and user access information to the first network device, so that the first network device can uniformly manage the devices (including wired devices and wireless devices) and user equipment (including wireless users, wired devices) in the VXLAN user).

In addition, the source wireless access device AP1 can be deployed in the VXLAN, as shown in Figure 16, AP1 is an edge device; or, AP1 can also be deployed outside the VXLAN, as shown in Figure 17. When the AP1 is a traditional AP and only supports the CAPWAP protocol, the VXLAN architecture adopts the structure shown in FIG. 17 .

Specifically, the methods include:

300: The wireless access device AP1 registers with the WAC.

Specifically, when AP1 goes online, AP1 sends relevant information of AP1, such as the address and serial number of AP1, to WAC, so as to register relevant information of AP1 at WAC. Specifically, the AP1 can send the relevant information of the AP1 to the WAC by using the CAPWAP management channel.

301: After the WAC completes the registration of the AP1, the WAC synchronizes the related information of the AP1 to the first network device, so that the first network device also learns the related information of the AP1. Correspondingly, the first network device receives the relevant information of the AP1 sent by the WAC.

Specifically, the WAC sends the relevant information of the AP1 to the first network device through the VXLAN control plane tunnel. Similarly, if there are other APs online, such as AP2, the WAC registers the relevant information of other APs to the WAC first by using the methods of the above steps 300 and 301, and then synchronizes the relevant information of the APs to the first network. equipment.

302: The first network device acquires a VXLAN control plane tunnel according to the relevant information of the AP1.

In an implementation manner, as shown in FIG. 18 , when AP1 is an edge device in VXLAN, the first network device obtains the VXLAN control plane tunnel between itself and the AP1 according to the relevant information of the AP1. Similarly, the first network device obtains the VXLAN control plane tunnel between itself and the AP2 according to the relevant information of the AP2.

Another implementation is that, as shown in FIG. 19 , when AP1 is a traditional AP and is deployed outside the VXLAN, the first network device obtains the VXLAN control plane tunnel between itself and the WAC according to the relevant information of the AP1 , because legacy AP1 does not support VXLAN tunneling.

303: When the wireless terminal UE1 attempts to access the destination terminal, the AP1 sends a first request message.

Wherein, the first request message includes the identifier of the destination terminal, or may also include the first user access information. Specifically, the content included in the first user access information is the same as that in the first embodiment.

In the network architecture shown in FIG. 18 , AP1 sends the first request message to the first network device by using the VXLAN control plane tunnel, and the first network device queries the first request message according to the first request message. The address of the destination access device, and send the address of the destination access device to the AP1, so that the AP1 obtains the VXLAN data plane tunnel with the destination access device, as shown in Figure 20, AP1 can directly obtain the VXLAN data plane tunnel with the destination access device (such as Border device or Edge device), so as to realize the interworking of wired and wireless network traffic. For a specific process, refer to steps 203 to 205 in the foregoing embodiment 1, which will not be repeated in this embodiment.

In addition, in the network architecture shown in FIG. 19 , step 303 specifically includes: the AP1 sends a first request message to the WAC by using the CAPWAP management channel.

Wherein, the first request message includes the first user access information; or, before AP1 sends the first request message, AP1 further sends the first user access information to the WAC through the CAPWAP management channel information. The WAC receives the first user access information, and sends the first user access information to the first network device through the VXLAN control plane tunnel. The first network device is made to manage and synchronize the first user access information.

Specifically, as shown in Figure 21, the method includes:

304: The WAC receives the first request message sent by the AP1.

305: The WAC queries whether the destination terminal is a device on the VXLAN side.

Specifically, after receiving the first request message, the WAC strips off the message header in the first request message to obtain the identifier of the destination terminal, where the identifier of the destination terminal is the address of the destination terminal, and then Check whether the address of the destination terminal is included in the user access information.

306: If yes, the WAC sends a second request message to the first network device. The second request message includes an identifier of the destination terminal, such as an IP address and/or a MAC address.

Specifically, the WAC encapsulates the message containing the identifier of the destination terminal into a VXLAN message (that is, the second request message), obtains the VXLAN control plane tunnel between the first network devices, and then converts the The second request message is sent to the first network device through the VXLAN control plane tunnel.

Optionally, if no, the WAC directly forwards the wireless network internal communication.

307: After receiving the second request message sent by the WAC, the first network device searches for the address of the destination access device of the wireless traffic, and sends the configuration parameters of the VXLAN data plane tunnel to the WAC, wherein the configuration The parameter includes the address of the destination access device.

For example, the first network device determines that the destination access device is AP2 according to the user access information query, and the configuration parameter includes the IP address and/or the MAC address of AP2.

308: After receiving the address of the destination access device, the WAC obtains a VXLAN data plane tunnel with the destination access device according to the address carried by the WAC.

309: Use the VXLAN data plane tunnel to perform data transmission between the destination access device and the WAC, and use the CAPWAP data channel to perform data transmission between the WAC and the AP1.

Specifically, the data plane networking scheme and traffic model are shown in Figure 22. If the request destination access device is an access switch, after the first network device finds the IP address of the access switch, the IP address It is sent to the WAC through the VXLAN control plane tunnel; after the WAC receives it, it obtains the VXLAN data plane tunnel between itself and the access switch, and then performs data transmission between the access switch and the WAC through the VXLAN data plane tunnel, and between the WAC and AP1 Between them, the data is transmitted through the original CAPWAP data channel.

Further, a data transmission process includes: the WAC receives a CAPWAP data message sent by a wireless access device using the CAPWAP channel, decapsulates the CAPWAP data message, and generates a VXLAN data message; then the WAC uses the The VXLAN data plane tunnel sends the VXLAN data packet to the destination access device.

It should be noted that this embodiment takes the first network device (Border device) responsible for managing and acquiring VXLAN control plane tunnels as an example for introduction. Similarly, a VXLAN network controller or a Border device integrated with WAC can also be responsible for For the management and acquisition of the VXLAN control plane tunnel, reference may be made to the method flow shown in FIG. 21 for a specific implementation method, which is not described separately in this embodiment.

In the method provided in this embodiment, the WAC is used to manage and forward user access information, and the VXLAN data plane tunnel between the destination access device and the WAC in the VXLAN is obtained, so as to realize the data transmission between the destination access device and the WAC. In addition, the original CAPWAP tunnel is still used to transmit data between the WAC and the traditional AP, thereby realizing the data transmission between the traditional AP and the destination device in the VXLAN.

In addition, in the wired and wireless interworking scenario shown in Figure 18, if the AP reuses the CAPWAP management channel as the VXLAN control plane, as shown in Figure 23, the wired access device reports user access information through the VXLAN control plane tunnel To the first network device, the AP reports the AP related information to the WAC through the CAPWAP management channel, and the WAC reports the AP related information and user access information to the first network device through the VXLAN control plane. At the same time, WAC obtains the address of the traffic destination access device from the first network device, and then transmits it to the AP through the CAPWAP management channel, so that the AP can obtain the VXLAN data plane between the Edge device on the access end of the wired user and implement VXLAN wired and wireless Interconnection of traffic.

In addition, optionally, on the basis of the foregoing Embodiment 2, the function of the VXLAN network controller in the first network device (Border device) is further stripped, that is, the VXLAN network controller is separately deployed in the VXLAN, As shown in Figure 24, the split VXLAN network controller can be deployed in a local or cloud environment.

The VXLAN network controller is used to uniformly collect and synchronize user access information in the VXLAN through the VXLAN control plane tunnel. In addition, the APs in the VXLAN also obtain the VXLAN traffic-related forwarding information from the VXLAN network controller through the VXLAN control plane tunnel. Obtain the VXLAN data plane tunnel and perform data transmission. Specifically, the methods include:

After the WAC completes the registration of the AP1, it synchronizes the relevant information of the AP1 to the VXLAN network controller, so that the VXLAN network controller also learns the relevant information of the AP1. Correspondingly, the VXLAN network controller receives the related information of AP1 and other APs, such as AP2, reported by the WAC. The VXLAN network controller obtains the VXLAN control plane tunnel with each AP according to the received information about all APs. Specifically, the VXLAN network controller manages and synchronizes relevant information of all APs it receives, and obtains the VXLAN control plane tunnel between the VXLAN network controller and AP1, and the VXLAN control plane tunnel between the VXLAN network controller and AP2. In addition, it also includes acquiring the VXLAN control plane tunnel between the Border device and the VXLAN network controller.

When UE1 tries to access the destination terminal, the VXLAN network controller queries the address of the traffic destination access device according to the first request message sent by AP1, and sends the address of the destination access device to AP1, so that AP1 obtains the address of the destination access device. End access devices, such as the VXLAN data plane tunnel between AP2, and finally use the VXLAN data plane tunnel for data transmission.

The specific process is similar to the foregoing steps 303 to 306, and the difference is only that the above-mentioned first network device is replaced with a VXLAN network controller, which is not described in detail here in this embodiment.

In this embodiment, the AP still uses the CAPWAP management channel to register AP related information on the WAC, and the WAC reports the AP related information to the controller VXLAN network controller, so that the VXLAN network controller can manage the VXLAN devices uniformly. The AP of the VXLAN device reports the user access information to the VXLAN network controller through the VXALN control plane tunnel, and synchronously queries the VXLAN network controller for the address information of the access device at the destination end of the traffic, and then obtains the connection information with the access device at the destination end. VXLAN data plane tunnel and realize data forwarding. In this example, the controller VXLAN network controller and the WAC, AP and other network devices forward control packets, and do not participate in the forwarding of data packets, but the data packets are transmitted directly by the access switch AP It is implemented by the VXLAN data plane tunnel obtained between the AP and the AP, or between the AP and the Border device. The corresponding networking model is shown in Figure 25.

In addition, for the traditional AP, the CAPWAP management channel can also be reused to send user access information. As shown in Figure 26, the AP uses the CAPWAP management channel to communicate with the WAC, and then the WAC synchronizes the AP-related information and user access information to the VXLAN network controller. At the same time, the WAC obtains the necessary information related to VXLAN forwarding from the VXLAN network controller, and then forwards it to the AP, so that the AP obtains the VXLAN data plane tunnel with another AP and transmits VXLAN data packets.

Apparatus embodiments corresponding to the foregoing method embodiments are introduced below.

FIG. 27 is a schematic structural diagram of a data transmission apparatus according to an embodiment of the present application. The apparatus may be a wireless access device such as an AP, a wireless terminal, a WAC, a VXLAN network controller, or a core switch in the foregoing embodiments; or may be a component located in any of the foregoing network devices, such as a chip.

Specifically, as shown in FIG. 27 , the apparatus may include: a receiving module 901 , a processing module 902 and a sending module 903 . In addition, the apparatus may further include other units or modules such as a storage unit, which are not limited in this embodiment.

Wherein, when the device is used as the first network device in the VXLAN, the receiving module 901 is configured to receive the first request message sent by the wireless access device when the wireless terminal attempts to access the destination terminal through the wireless access device, The first request message includes the identifier of the destination terminal, and the wireless access device has the capability of serving as a VXLAN tunnel endpoint VTEP.

The processing module 902 is configured to determine the destination access device corresponding to the destination terminal according to the user access information, where the user access information includes the correspondence between the destination terminal and the destination access device, The destination access device has the capability of serving as a VTEP.

The sending module 903 is configured to send, to the wireless access device, configuration parameters of the VXLAN data plane tunnel from the wireless access device to the destination access device, where the configuration parameters include the address of the destination access device .

The destination access device is an edge device or a border device in the VXLAN.

Optionally, the identifier of the destination terminal is the address of the destination terminal, such as an IP address and/or a MAC address.

Optionally, in a specific implementation manner, the receiving module 901 is specifically configured to receive the first request message sent by the wireless access device using a CAPWAP channel.

Optionally, in another specific implementation manner, the receiving module 901 is further configured to receive the wireless access device from the wireless access controller WAC before receiving the first request message sent by the wireless access device. The processing module 902 is further configured to obtain the VXLAN control plane tunnel between the wireless access device and the wireless access device according to the address of the wireless access device; the receiving module 901 is further configured to use the VXLAN control plane tunnel to receive the VXLAN control plane tunnel. The first request message sent by the wireless access device.

Optionally, in another specific implementation manner, the receiving module 901 is further configured to receive the first user access information sent by the wireless access device before the processing module 902 obtains the VXLAN control plane tunnel, so the The first user access information includes the correspondence between the wireless terminal and the wireless access device.

Optionally, in another specific implementation manner, the receiving module 901 is specifically configured to receive the first user access information by using a CAPWAP channel or a VXLAN control plane tunnel.

In addition, when the apparatus acts as a wireless access device in the VXLAN, such as an AP, the sending module 903 is configured to send a first request message to the first network device when the wireless terminal attempts to access the destination terminal through the wireless access device , the first request message includes the identifier of the destination terminal, and the wireless access device has the capability of serving as a VXLAN tunnel endpoint VTEP. The receiving module 901 is configured to receive configuration parameters of the VXLAN data plane tunnel sent by the first network device, where the configuration parameters include the address of the destination access device, and the destination access device has the capability of serving as a VTEP. The processing module 902 is configured to acquire the VXLAN data plane tunnel from the wireless access device to the destination access device according to the address of the destination access device.

Optionally, in a specific implementation manner, the sending module 903 is specifically configured to send the first request message to the first network device by using a CAPWAP channel.

Optionally, in another specific implementation manner, the sending module 903 is specifically configured to send the first request message to the wireless access controller WAC by using a CAPWAP channel, so that the WAC can send the first request message according to the first request message. The identifier of the destination terminal described in the above generates a second request message, and sends the second request message to the first network device, where the second request message includes the identifier of the destination terminal.

Optionally, in another specific implementation manner, the sending module 903 is further configured to send the first user access information to the first network device before sending the first request message to the first network device, The first user access information includes the correspondence between the wireless terminal and the wireless access device.

Optionally, in another specific implementation manner, the sending module 903 is specifically configured to send the first user access information to the first network device by using a CAPWAP channel or a VXLAN control plane tunnel.

In addition, when the device is used as the WAC in the VXLAN, the receiving module 901 is configured to receive the first request message sent by the wireless access device using the CAPWAP channel when the wireless terminal attempts to access the destination terminal through the wireless access device, The first request message includes the identifier of the destination terminal, and the wireless access device has the capability of serving as a VXLAN tunnel endpoint VTEP. The sending module 903 is configured to send the second request message including the destination terminal identifier to the first network device. The receiving module 901 is further configured to receive the configuration parameters of the VXLAN data plane tunnel sent by the first network device, where the configuration parameters include the address of the destination access device, and the destination access device has the capability of serving as a VTEP . The processing module 902 is configured to obtain the VXLAN data plane tunnel from the WAC to the destination access device according to the address of the destination access device, and use the CAPWAP channel to transmit data with the wireless access device, and Use the VXLAN data plane tunnel to transmit the data with the destination access device.

Optionally, in a specific implementation manner, the receiving module 901 is further configured to, before receiving the first request message sent by the wireless access device using the CAPWAP channel, use the CAPWAP channel from the The wireless access device receives the address of the wireless access device; the sending module 903 is further configured to send the address of the wireless access device to the first network device; the processing module 902 is further configured to obtain the WAC and the address of the wireless access device. The VXLAN control plane tunnel between the first network devices; the sending module 903 is further configured to use the VXLAN control plane tunnel to send the second request message to the first network device.

Optionally, in another specific implementation manner, the receiving module 901 is further configured to receive the wireless access device before receiving the first request message sent by the wireless access device using the CAPWAP channel The first user access information sent by using the CAPWAP channel, where the first user access information includes the correspondence between the wireless terminal and the wireless access device. The sending module 903 is further configured to send the first user access information to the first network device.

Optionally, in yet another specific implementation manner, the receiving module 901 is specifically configured to receive the CAPWAP data packet sent by the wireless access device using the CAPWAP channel; the processing module 902 is specifically configured to receive the CAPWAP data packet. After the packet is decapsulated, a VXLAN data packet is generated; the sending module 903 is specifically configured to use the VXLAN data plane tunnel to send the VXLAN data packet to the destination access device.

In this embodiment, when a terminal device is connected to the VXLAN, each access device reports its user access information to the first network device through the access device, and the first network device manages it uniformly, thereby greatly reducing the It reduces the complexity of managing and synchronizing user access information, simplifies the network architecture, and simplifies management and resource configuration.

In addition, after the wireless access device at the source end obtains the VXLAN data plane tunnel with the access device at the destination end, whether it is external traffic transmission or internal traffic transmission, only one VXLAN packet transmission process is required during the VXLAN transmission process. Decapsulation operation, thereby improving the forwarding efficiency of VXLAN packets.

In addition, in a hardware implementation, an embodiment of the present application further provides a communication device, where the communication device may be the first network device, wireless access device, destination access device, AP, WAC in the foregoing embodiments , VXLAN network controller, or any of the Edge devices.

FIG. 28 shows a schematic structural diagram of the communication device. The communication device may include: a processor 110 , a memory 120 and at least one communication interface 130 , wherein the processor 110 , the memory 120 and the at least one communication interface 130 are coupled through a communication bus 140 .

Among them, the processor 110 is the control center of the communication equipment, and can be used to complete the communication in the VXLAN, including data transmission using the VXLAN data plane tunnel, such as the encapsulation and decapsulation of VXLAN data packets; and also includes using the VXLAN control plane tunnel to do Information synchronization and forwarding, query of VXLAN traffic destination information, etc.

The processor 110 may be composed of an integrated circuit (Integrated Circuit, IC), for example, may be composed of a single packaged IC, or may be composed of a plurality of packaged ICs connected with the same function or different functions. For example, the processor 110 may include a central processing unit (Central Processing Unit, CPU) or a digital signal processor (Digital Signal Processor, DSP) or the like.

In addition, the processor 110 may further include a hardware chip, and the hardware chip may be an application specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof. The above-mentioned PLD can be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a general array logic (generic array logic, GAL) or any combination thereof.

The memory 120 is used to store and exchange various types of data or software, including user access information during VXLAN communication, AP related information, information of forwarding devices, and VXLAN data packets. In addition, computer programs or codes may be stored in the memory 120 .

Specifically, the memory 120 may include volatile memory (volatile memory), such as random access memory (Random Access Memory, RAM); may also include non-volatile memory (non-volatile memory), such as flash memory (flash memory) memory), a hard disk (Hard Sisk Drive, HDD) or a solid-state drive (Solid-State Drive, SSD), the memory 120 may also include a combination of the above-mentioned types of memory.

Communication interface 130, using any transceiver-like device, is used to communicate with other devices or communication networks, such as Ethernet, radio access network (RAN), WLAN, VXLAN, and the like. For example, the communication interface 130 is used to receive the first request message and user access information; and to send the configuration parameters of the VXLAN data plane tunnel, and the like.

It should be understood that the above communication device may also include other more or less components, and the structures illustrated in the embodiments of the present application do not constitute a specific limitation on the communication device. And the components shown in FIG. 28 can be implemented in hardware, software, firmware or any combination thereof.

When implemented in software, it can be implemented in whole or in part in the form of a computer program product. For example, the receiving module 901 and the sending module 903 in the aforementioned data transmission device shown in FIG. 27 can be implemented through the communication interface 130, the function of the processing module 902 can be implemented by the processor 110, and the function of the storage unit can be implemented by the processor 110. It may be implemented by the memory 120 .

In addition, an embodiment of the present application further provides a switch. As shown in FIG. 29 , a modular switch, such as a Border device, may also be an edge device. Specifically, it includes: a main control board 210 , a backplane 220 , an interface board 230 and other components. The main control board 210 is connected to the interface board 230 through the backplane 220 .

The main control board 210 includes a processing unit 2101 , a storage unit 2102 and a switching network 2103 . And the processing unit 2101 is coupled with the storage unit 2102 and the switching network 2103 . The processing unit 2101 may have the same structure as the aforementioned processor 110, and the storage unit 2102 may also have the same structure as the aforementioned memory 120, for implementing all the functions of the aforementioned Border device or edge device.

The switching network 2103 can be used to implement wired and wireless communication, for example, the switching network 2103 includes a mobile communication module, a wireless communication module, and the like. The mobile communication module includes modules with wireless communication functions such as 2G/3G/4G/5G. In addition, filters, switches, power amplifiers, low noise amplifiers (LNAs), etc. may also be included. In some embodiments, at least part of the functional modules of the mobile communication module may be provided in the processing unit 2101 . The wireless communication module can provide wireless communication solutions including WLAN, VXLAN, Bluetooth (BT), global navigation satellite system (GNSS), frequency modulation (FM), etc. applied on the switch. .

The interface board 230 includes at least one interface for connecting with external devices. For example, a display screen, a camera, a microphone, an earphone, a SIM card, etc. can be inserted into the interface board 230 , or an external device can be connected through a USB interface on the interface board 230 .

Optionally, the main control board 210 is a type of printed circuit boards (printed circuit boards, PCB), referred to as "PCB board" for short. The PCB board includes chip circuits, which can be used to implement the functions of the processing unit 2101 , the storage unit 2102 and the switching network 2103 .

In addition, an embodiment of the present application also provides a network system, the system includes at least one network device and a terminal device, when the network device is a wireless access device, a destination access device, an AP, a WAC, and a VXLAN network controller . When some edge devices are used, their structure can be the same as that of the communication device shown in FIG. 28, and is used to implement the data transmission method in the foregoing embodiment. When the network device is a Border device, a core switch, an aggregation switch, or an access switch, such as another part of the edge device, its structure may be the same as the communication device shown in FIG. 29 .

The structure of the terminal device may be the same as or different from the structure of the communication device shown in FIG. 28 , and the structure and specific form of the terminal device are not limited in this embodiment. Optionally, the terminal device may be a portable device, such as a smart terminal, a mobile phone, a notebook computer, a tablet computer, a personal computer (personal computer, PC), a foldable terminal, a wearable device with a wireless communication function (such as Smart watch or bracelet, AR glasses), user device (user device) or user equipment (User Equipment, UE), etc. In addition, the above-mentioned various terminal devices include, but are not limited to, those equipped with Apple (IOS), Android (Android), Microsoft (Microsoft) or other operating systems.

Embodiments of the present application also provide a computer program product, where the computer program product includes one or more computer program instructions. When the computer program instructions are loaded and executed by a computer, the procedures or functions described in accordance with the various embodiments described above are produced in whole or in part. The computer may be a general purpose computer, special purpose computer, computer network, or other programmable device.

The computer program instructions may be stored in or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be transferred from a network node, computer, server or data The center transmits to another node by wire or wireless.

In addition, in the description of the embodiments of the present application, unless otherwise specified, "plurality" refers to two or more than two. In addition, in order to clearly describe the technical solutions of the embodiments of the present application, in the embodiments of the present application, words such as "first" and "second" are used to distinguish the same or similar items with basically the same function and effect. Those skilled in the art can understand that the words "first", "second" and the like do not limit the quantity and execution order, and the words "first", "second" and the like are not necessarily different.

The embodiments of the present application described above do not constitute a limitation on the protection scope of the present application.

Claims

A data transmission method, characterized in that it is applied to a first network device in a virtual extensible local area network (VXLAN), the method comprising:

When the wireless terminal attempts to access the destination terminal through the wireless access device, the first network device receives a first request message sent by the wireless access device, where the first request message includes the identifier of the destination terminal, The wireless access device has the capability of serving as a VXLAN tunnel endpoint VTEP;

The first network device determines a destination access device corresponding to the destination terminal according to user access information, where the user access information includes a correspondence between the destination terminal and the destination access device , the destination access device has the capability of serving as a VXLAN tunnel endpoint VTEP;

The first network device sends, to the wireless access device, configuration parameters of the VXLAN data plane tunnel from the wireless access device to the destination access device, where the configuration parameters include the configuration parameters of the destination access device. address.
The method according to claim 1, wherein the receiving, by the first network device, the first request message sent by the wireless access device comprises:

The first network device receives the first request message sent by the wireless access device using the wireless access point control and configuration CAPWAP channel.
The method according to claim 1, wherein before the first network device receives the first request message sent by the wireless access device, the method further comprises:

the first network device receives the address of the wireless access device from the wireless access controller WAC;

obtaining, by the first network device, a VXLAN control plane tunnel with the wireless access device according to the address of the wireless access device;

The first network device receives the first request message sent by the wireless access device, including:

The first network device uses the VXLAN control plane tunnel to receive the first request message sent by the wireless access device.
The method according to claim 1 or 2, wherein before the first network device determines the destination access device corresponding to the destination terminal according to the user access information, the method further comprises:

The first network device receives first user access information sent by the wireless access device, where the first user access information includes a correspondence between the wireless terminal and the wireless access device.
The method according to claim 4, wherein the receiving, by the first network device, the first user access information sent by the wireless access device comprises:

The first network device receives the first user access information by using a CAPWAP channel or a VXLAN control plane tunnel.
The method according to any one of claims 1-5, wherein the identifier of the destination terminal is the address of the destination terminal.
The method according to any one of claims 1-6, wherein the destination access device is an edge device or a border device in the VXLAN.
A data transmission method, characterized in that it is applied to a wireless access device in a virtual extensible local area network (VXLAN), the method comprising:

When the wireless terminal attempts to access the destination terminal through the wireless access device, the wireless access device sends a first request message to the first network device, where the first request message includes the identifier of the destination terminal, the The wireless access device has the ability to act as a VXLAN tunnel endpoint VTEP;

The wireless access device receives the configuration parameters of the VXLAN data plane tunnel sent by the first network device, the configuration parameters include the address of the destination access device, and the destination access device has the ability to act as a VTEP ;

The wireless access device acquires the VXLAN data plane tunnel from the wireless access device to the destination access device according to the address of the destination access device.
The method according to claim 8, wherein the wireless access device sends the first request message to the first network device, comprising:

The wireless access device sends the first request message to the first network device by using a wireless access point control and configuration CAPWAP channel.
The method according to claim 8, wherein the wireless access device sends the first request message to the first network device, comprising:

The wireless access device sends the first request message to the wireless access controller WAC by using a CAPWAP channel.
The method according to any one of claims 8-10, wherein before the wireless access device sends the first request message to the first network device, the method further comprises:

The wireless access device sends first user access information to the first network device, where the first user access information includes a correspondence between the wireless terminal and the wireless access device.
The method according to claim 11, wherein the sending, by the wireless access device, the first user access information to the first network device comprises:

The wireless access device sends the first user access information to the first network device by using a CAPWAP channel or a VXLAN control plane tunnel.
The method according to any one of claims 8-12, wherein the identifier of the destination terminal is the address of the destination terminal.
The method according to any one of claims 8-13, wherein the destination access device is an edge device or a border device in the VXLAN.
A data transmission method, characterized in that it is applied to a wireless access controller WAC in a virtual extensible local area network (VXLAN), the method comprising:

When the wireless terminal attempts to access the destination terminal through the wireless access device, the WAC receives a first request message sent by the wireless access device using the wireless access point control and configuration CAPWAP channel, where the first request message includes all The identifier of the destination terminal, the wireless access device has the capability of serving as a VXLAN tunnel endpoint VTEP;

The WAC sends the second request message including the destination terminal identifier to the first network device;

receiving, by the WAC, a configuration parameter of a VXLAN data plane tunnel sent by the first network device, where the configuration parameter includes an address of the destination access device, and the destination access device has the capability of serving as a VTEP;

The WAC obtains the VXLAN data plane tunnel from the WAC to the destination access device according to the address of the destination access device;

The WAC uses the CAPWAP channel to transmit data with the wireless access device, and uses the VXLAN data plane tunnel to transmit the data to the destination access device.
The method according to claim 15, wherein before the WAC receives the first request message sent by the wireless access device using the CAPWAP channel, the method further comprises:

receiving, by the WAC, the address of the wireless access device from the wireless access device using the CAPWAP channel;

sending, by the WAC, the address of the wireless access device to the first network device;

obtaining, by the WAC, a VXLAN control plane tunnel between the WAC and the first network device;

The WAC sends the second request message including the destination terminal identifier to the first network device, including:

The WAC sends the second request message to the first network device using the VXLAN control plane tunnel.
The method according to claim 15, wherein before the WAC receives the first request message sent by the wireless access device using the CAPWAP channel, the method further comprises:

receiving, by the WAC, first user access information sent by the wireless access device using the CAPWAP channel, where the first user access information includes a correspondence between the wireless terminal and the wireless access device;

The WAC sends the first user access information to the first network device.
The method according to any one of claims 15-17, wherein the WAC uses the CAPWAP channel to transmit data with the wireless terminal, and uses the VXLAN data plane tunnel to access the device with the destination terminal Transmitting said data, including:

receiving, by the WAC, a CAPWAP data packet sent by the wireless access device using the CAPWAP channel;

After the WAC decapsulates the CAPWAP data message, a VXLAN data message is generated;

The WAC uses the VXLAN data plane tunnel to send the VXLAN data packet to the destination access device.
A network device in a virtual extensible local area network (VXLAN), characterized in that it includes:

A receiving module, configured to receive a first request message sent by the wireless access device when the wireless terminal attempts to access the destination terminal through the wireless access device, where the first request message includes the identifier of the destination terminal, and the The wireless access device has the capability of serving as a VXLAN tunnel endpoint VTEP;

a processing module, configured to determine a destination access device corresponding to the destination terminal according to user access information, where the user access information includes a correspondence between the destination terminal and the destination access device, The destination access device has the capability of serving as a VTEP;

A sending module, configured to send configuration parameters of the VXLAN data plane tunnel from the wireless access device to the destination access device to the wireless access device, where the configuration parameters include the address of the destination access device .
The network device according to claim 19, wherein the receiving module is specifically configured to receive the first request message sent by the wireless access device using a wireless access point control and configuration CAPWAP channel.
The network device according to claim 19, wherein,

The receiving module is further configured to receive the address of the wireless access device from the wireless access controller WAC before receiving the first request message sent by the wireless access device;

a processing module, further configured to obtain a VXLAN control plane tunnel with the wireless access device according to the address of the wireless access device;

The receiving module is further configured to use the VXLAN control plane tunnel to receive the first request message sent by the wireless access device.
The network device according to claim 19 or 20, wherein the receiving module is further configured to receive the first user sent by the wireless access device before the processing module acquires the VXLAN control plane tunnel Access information, where the first user access information includes the correspondence between the wireless terminal and the wireless access device.
The network device according to claim 22, wherein the receiving module is specifically configured to receive the first user access information by using a CAPWAP channel or a VXLAN control plane tunnel.
A wireless access device in a virtual extensible local area network (VXLAN), characterized in that it includes:

a sending module, configured to send a first request message to a first network device when the wireless terminal attempts to access the destination terminal through the wireless access device, where the first request message includes the identifier of the destination terminal, the wireless terminal The access device has the ability to act as a VXLAN tunnel endpoint VTEP;

a receiving module, configured to receive configuration parameters of the VXLAN data plane tunnel sent by the first network device, where the configuration parameters include the address of the destination access device, and the destination access device has the capability of serving as a VTEP;

The processing module is configured to obtain the VXLAN data plane tunnel from the wireless access device to the destination access device according to the address of the destination access device.
The wireless access device according to claim 24, wherein the sending module is specifically configured to send the first request message to the first network device by using a wireless access point control and configuration CAPWAP channel.
The wireless access device according to claim 24, wherein the sending module is specifically configured to send the first request message to the wireless access controller WAC by using a CAPWAP channel.
The wireless access device according to claim 24 or 25, wherein the sending module is further configured to send the first request message to the first network device before sending the first request message to the first network device. User access information, where the first user access information includes the correspondence between the wireless terminal and the wireless access device.
The wireless access device according to claim 27, wherein the sending module is specifically configured to send the first user access information to the first network device by using a CAPWAP channel or a VXLAN control plane tunnel.
A wireless access controller WAC in a virtual extensible local area network (VXLAN), characterized in that it includes:

a receiving module, configured to receive a first request message sent by the wireless access device using the wireless access point control and configuration CAPWAP channel when the wireless terminal attempts to access the destination terminal through the wireless access device, the first request message Including the identifier of the destination terminal, and the wireless access device has the capability of serving as the VXLAN tunnel endpoint VTEP;

a sending module, configured to send the second request message including the destination terminal identifier to the first network device;

The receiving module is further configured to receive configuration parameters of the VXLAN data plane tunnel sent by the first network device, where the configuration parameters include the address of the destination access device, and the destination access device has an address as a VTEP Ability;

a processing module, configured to obtain the VXLAN data plane tunnel from the WAC to the destination access device according to the address of the destination access device, and use the CAPWAP channel to transmit data with the wireless access device, and Use the VXLAN data plane tunnel to transmit the data with the destination access device.
The WAC of claim 29, wherein

The receiving module is further configured to receive the wireless access device from the wireless access device by using the CAPWAP channel before receiving the first request message sent by the wireless access device by using the CAPWAP channel the address of;

The sending module is further configured to send the address of the wireless access device to the first network device;

The processing module is further configured to acquire the VXLAN control plane tunnel between the WAC and the first network device;

The sending module is further configured to send the second request message to the first network device by using the VXLAN control plane tunnel.
The WAC of claim 29, wherein

The receiving module is further configured to, before receiving the first request message sent by the wireless access device using the CAPWAP channel, receive a first user access message sent by the wireless access device using the CAPWAP channel information, the first user access information includes the correspondence between the wireless terminal and the wireless access device;

The sending module is further configured to send the first user access information to the first network device.
The WAC according to any one of claims 29-31, wherein,

The receiving module is specifically configured to receive the CAPWAP data packet sent by the wireless access device using the CAPWAP channel;

The processing module is specifically configured to generate a VXLAN data message after decapsulating the CAPWAP data message;

The sending module is specifically configured to use the VXLAN data plane tunnel to send the VXLAN data packet to the destination access device.
A VXLAN network device, characterized in that the network device includes a processor and a memory;

the memory for storing computer program instructions;

The processor is configured to execute the instructions stored in the memory, so that the network device executes the method according to any one of claims 1 to 18.
A computer-readable storage medium having instructions stored in the computer-readable storage medium, when executed on a computer, cause the computer to perform the method of any one of claims 1-18.