CN105519049B - A kind of message transmitting method, apparatus and system - Google Patents

Abstract

The embodiment of the invention discloses a message transmission method, device and system, relates to the communication field, and can improve the interaction performance between a switch and a controller. The specific solution is: the first OpenFlow device determines the type of the signaling message; the first OpenFlow device according to the configuration information, if the signaling message is a signaling message including forwarding plane data, the first OpenFlow device Send the signaling message to the second OpenFlow device through a connectionless transmission protocol. The invention is used in the process of message transmission.

Description

A message transmission method, device and system

technical field

The present invention relates to the communication field, in particular to a message transmission method, device and system.

Background technique

With the rapid expansion of the Internet scale, the original routing system is too bloated and poorly controllable. Therefore, a new network architecture concept is needed to maintain the sustainable development of the Internet. In view of this, OpenFlow technology came into being. OpenFlow technology is a set of switching standards with an open interface and supports multiple controls. OpenFlow technology is based on the existing Transmission Control Protocol/Internet Protocol (TCP/IP) The packet forwarding process controlled by the /router is transformed into an independent process completed by the OpenFlow switch (hereinafter referred to as the switch) and the OpenFlow controller (hereinafter referred to as the controller) supporting OpenFlow technology, realizing the separation of the forwarding plane and the control plane.

In the current typical OpenFlow architecture, the controller and the switch interact by establishing a transmission channel of the TCP protocol, and the interaction performance of this interaction mode is low.

Contents of the invention

Embodiments of the present invention provide a message transmission method, device and system, which can improve the interaction performance between a switch and a controller.

In order to achieve the above object, embodiments of the present invention adopt the following technical solutions:

A first aspect of the present invention provides a message transmission method, including:

The first OpenFlow device determines the type of the signaling packet;

According to the configuration information of the first OpenFlow device, if the signaling message is a signaling message including forwarding plane data, the first OpenFlow device sends the signaling message to the second OpenFlow devices.

In combination with the first aspect, in a possible implementation manner, it also includes:

The first OpenFlow device, according to the configuration information, if the signaling message is a signaling message with a configuration function, the first OpenFlow device sends the signaling message to The second OpenFlow device.

In combination with the first aspect and the foregoing possible implementation manners, another possible implementation manner further includes:

The first OpenFlow device, according to the configuration information, if the signaling message is a signaling message with a control function, the first OpenFlow device sends the signaling message to the Describe the second OpenFlow device.

With reference to the first aspect and the foregoing possible implementation manner, in another possible implementation manner, the first OpenFlow device is a switching device, and the second OpenFlow device is a control device;

The method also includes:

The first OpenFlow device receives the configuration information sent by the configuration device.

With reference to the first aspect and the foregoing possible implementation manner, in another possible implementation manner, the first OpenFlow device receiving the configuration information sent by the configuration device includes:

The first OpenFlow device establishes a connection with the configuration device using a connection-oriented transport protocol or a multi-homing-supporting transport protocol;

The first OpenFlow device receives the configuration information sent by the configuration device through the connection.

With reference to the first aspect and the foregoing possible implementation manner, in another possible implementation manner, the configuration device is the second OpenFlow device.

With reference to the first aspect and the foregoing possible implementation manner, in another possible implementation manner, the first OpenFlow device is a control device, and the second OpenFlow device is a switching device;

The method also includes:

The first OpenFlow device sends the configuration information to the second OpenFlow device.

Combining the first aspect and the above possible implementation manners, in another possible implementation manner,

The configuration information is pre-configured in the first OpenFlow device;

Or, before the first OpenFlow device sends the configuration information to the second OpenFlow device, it further includes:

The first OpenFlow device generates the configuration information.

With reference to the first aspect and the foregoing possible implementation manner, in another possible implementation manner, the first OpenFlow device sending the configuration information to the second OpenFlow device includes:

The first OpenFlow device establishes a connection with the second OpenFlow device using a connection-oriented transport protocol or a multi-homing-supporting transport protocol;

The configuration information sent by the first OpenFlow device to the second OpenFlow device through the connection.

A second aspect of the present invention provides a message transmission device, the device comprising:

a determining unit, configured to determine the type of the signaling message;

The first sending unit is configured to, according to the configuration information, if the signaling message obtained by the determining unit is a signaling message including data on the forwarding plane, send the signaling message to the second through a connectionless transmission protocol. Two OpenFlow devices.

In combination with the second aspect, in a possible implementation manner, it also includes:

The second sending unit is configured to send the signaling message through a transmission protocol supporting multi-homing if the signaling message obtained by the determining unit is a signaling message with a configuration function according to the configuration information to the second OpenFlow device.

In combination with the second aspect and the foregoing possible implementation manner, another possible implementation manner further includes:

The third sending unit is configured to, according to the configuration information, if the signaling message obtained by the determining unit is a signaling message with a control function, send the signaling message to a connection-oriented transmission protocol. The second OpenFlow device.

With reference to the second aspect and the foregoing possible implementation manner, in another possible implementation manner, the apparatus is a switching device, and the second OpenFlow device is a control device;

The installation also includes:

The receiving unit is configured to receive the configuration information sent by the configuration device.

In combination with the second aspect and the foregoing possible implementation manner, in another possible implementation manner, the receiving unit is specifically configured to:

Establishing a connection with the configuration device by using a connection-oriented transport protocol or a transport protocol supporting multi-homing;

The configuration information sent by the configuration device is received through the connection.

With reference to the second aspect and the foregoing possible implementation manner, in another possible implementation manner, the configuration device is the second OpenFlow device.

With reference to the second aspect and the foregoing possible implementation manner, in another possible implementation manner, the apparatus is a control device, and the second OpenFlow device is a switching device;

The device also includes:

A fourth sending unit, configured to send the configuration information to the second OpenFlow device.

In combination with the second aspect and the above possible implementation manners, in another possible implementation manner,

The configuration information is pre-configured in the device;

Alternatively, the device also includes:

A generating unit, configured to generate the configuration information before the fourth sending unit sends the configuration information to the second OpenFlow device.

In combination with the second aspect and the foregoing possible implementation manner, in another possible implementation manner, the fourth sending unit is specifically configured to:

Establishing a connection with the second OpenFlow device by using a connection-oriented transport protocol or a transport protocol supporting multi-homing;

The configuration information sent to the second OpenFlow device through the connection.

A third aspect of the present invention provides a message transmission device, the device comprising:

a communication unit for interacting with external network elements;

A processor, configured to determine the type of the signaling message, and according to the configuration information, if the signaling message is a signaling message including forwarding plane data, the communication unit uses a connectionless transmission protocol to send the The signaling message is sent to the second OpenFlow device.

In combination with the third aspect, in a possible implementation,

The processor is further configured to, according to the configuration information, if the signaling message is a signaling message with a configuration function, send the signaling message through the communication unit using a transmission protocol supporting multi-homing text to the second OpenFlow device.

In combination with the third aspect and the above possible implementation, in another possible implementation,

The processor is further configured to, according to the configuration information, if the signaling message is a signaling message with a control function, send the signaling message through the communication unit using a connection-oriented transmission protocol to the second OpenFlow device.

With reference to the third aspect and the foregoing possible implementation manner, in another possible implementation manner, the apparatus is a switching device, and the second OpenFlow device is a control device;

The processor is further configured to receive the configuration information sent by the configuration device through the communication unit.

With reference to the third aspect and the foregoing possible implementation manner, in another possible implementation manner, the processor is further configured to, through the communication unit, use a connection-oriented transport protocol or a multi-homing-supporting transport protocol to establish a connection with the the connection of the configuration device, and use the connection to receive the configuration information sent by the configuration device through the communication unit.

With reference to the third aspect and the foregoing possible implementation manner, in another possible implementation manner, the configuration device is the second OpenFlow device.

With reference to the third aspect and the foregoing possible implementation manner, in another possible implementation manner, the apparatus is a control device, and the second OpenFlow device is a switching device;

The processor is further configured to send the configuration information to the second OpenFlow device through the communication unit.

In combination with the third aspect and the above possible implementation, in another possible implementation,

The configuration information is pre-configured in the device;

or,

The processor is further configured to generate the configuration information before sending the configuration information to the second OpenFlow device through the communication unit.

In combination with the third aspect and the above possible implementation, in another possible implementation,

The processor is further configured to use the communication unit to establish a connection with the second OpenFlow device using a connection-oriented transport protocol or a multi-homing-supporting transport protocol, and use the communication unit to use the connection to The configuration information sent by the second OpenFlow device.

A fourth aspect of the present invention provides a message transmission system, including: a message transmission device and a second OpenFlow device; wherein, the message transmission device is a switching device, and the second OpenFlow device is a control device.

The message transmission device is used to determine the type of the signaling message; according to the configuration information, if the signaling message is a signaling message including forwarding plane data, the signaling message is sent through a connectionless transmission protocol Send the message to the second OpenFlow device; if the signaling message is a signaling message with a configuration function, send the signaling message to the second OpenFlow device through a transmission protocol supporting multi-homing; if the The signaling message is a signaling message with a control function, and the signaling message is sent to the second OpenFlow device through a connection-oriented transmission protocol.

The second OpenFlow device is configured to receive a signaling message sent by the message transmission device through a connectionless transmission protocol; receive a signaling message sent by the message transmission device through a multi-homed transmission protocol; receiving the signaling message sent by the message transmission device through the connection-oriented transmission protocol.

A fifth aspect of the present invention provides a message transmission system, including: a message transmission device and a second OpenFlow device; wherein, the message transmission device is a control device, and the second OpenFlow device is a switching device.

The message transmission device is used to determine the type of the signaling message; according to the configuration information, if the signaling message is a signaling message including forwarding plane data, the signaling message is sent through a connectionless transmission protocol Send the message to the second OpenFlow device; if the signaling message is a signaling message with a configuration function, send the signaling message to the second OpenFlow device through a transmission protocol supporting multi-homing; if the The signaling message is a signaling message with a control function, and the signaling message is sent to the second OpenFlow device through a connection-oriented transmission protocol.

The second OpenFlow device is configured to receive a signaling message sent by the message transmission device through a connectionless transmission protocol; receive a signaling message sent by the message transmission device through a multi-homed transmission protocol; receiving the signaling message sent by the message transmission device through the connection-oriented transmission protocol.

In the message transmission method, device and system provided by the embodiments of the present invention, when the first OpenFlow device needs to send a signaling message to the second OpenFlow device, the signaling message including forwarding plane data is transmitted through a connectionless transmission protocol Sending the signaling message to the second OpenFlow device improves the interaction performance between the switch and the controller, and at the same time reduces the occurrence of head-to-head blocking that may be caused by using the TCP transmission protocol.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings without any creative effort.

FIG. 1 is a flow chart of a message transmission method provided by an embodiment of the present invention;

Fig. 2 is a flow chart of a message transmission method provided by another embodiment of the present invention;

FIG. 3 is a flow chart of another message transmission method provided by another embodiment of the present invention;

FIG. 4 is a flowchart of another message transmission method provided by another embodiment of the present invention;

Fig. 5 is a schematic composition diagram of a message transmission device provided by another embodiment of the present invention;

FIG. 6 is a schematic composition diagram of another message transmission device provided by another embodiment of the present invention;

FIG. 7 is a schematic composition diagram of another message transmission device provided by another embodiment of the present invention;

FIG. 8 is a schematic diagram of the composition of a message transmission system provided by another embodiment of the present invention;

FIG. 9 is a schematic diagram of another packet transmission system provided by another embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

In the existing OpenFlow architecture, the controller and the switch exchange data by establishing a transmission channel of the TCP protocol. Whether it is a configuration message to negotiate the capabilities of both parties, the controller sends the switch to control the switch to update the flow table. The control message, or the data message containing forwarding plane data sent by the switch to the controller is transmitted through this transmission channel. This transmission method does not distinguish the types of messages, and transmits all types of messages through the transmission channel established by the TCP protocol, so that the switch needs to maintain the connection state for a large number of messages, which brings a greater burden to the switch. Performance loss. For example, when the switch receives a large number of packets and cannot find a matching flow entry in the flow table, it needs to encapsulate all the packets and send them to the controller through the transmission channel. At this time, the switch needs to be maintained The status of a large number of TCP connections will bring a lot of performance overhead to the switch. Therefore, the solutions provided by the embodiments of the present invention can select different transmission protocols for transmission according to different types of signaling packets, thereby improving the interaction performance between the switch and the controller.

An embodiment of the present invention provides a message transmission method, as shown in Figure 1, the method may include:

101. The first OpenFlow device determines a type of a signaling packet.

Wherein, when the first OpenFlow device needs to send a signaling packet to the second OpenFlow device, the first OpenFlow device may first determine the type of the signaling packet. Wherein, when the first OpenFlow device is a switching device, the second OpenFlow device may be a control device, and when the first OpenFlow device is a control device, the second OpenFlow device may be a switching device.

102. According to the configuration information, if the signaling packet includes forwarding plane data, the first OpenFlow device sends the signaling packet to the second OpenFlow device through a connectionless transmission protocol.

Wherein, when the first OpenFlow device determines that the signaling message is a signaling message including forwarding plane data, the first OpenFlow device may send the signaling to the second OpenFlow device through a connectionless transmission protocol according to the configuration information message. The connectionless transmission protocol may be User Datagram Protocol (UDP).

In the message transmission method provided by the embodiment of the present invention, when the first OpenFlow device needs to send a signaling message to the second OpenFlow device, the signaling message including forwarding plane data is sent through a connectionless transmission protocol The message is sent to the second OpenFlow device, which improves the interaction performance between the switch and the controller, and at the same time reduces the occurrence of head-to-head blocking that may be caused by using the TCP transmission protocol.

Another embodiment of the present invention provides a message transmission method. In an application scenario of the embodiment of the present invention, when the first OpenFlow device is a switching device, the second OpenFlow device is a control device, and the configuration device is the second OpenFlow device , that is, when configuring the device as a control device, as shown in Figure 2, the method may include:

201a. The switching device establishes a connection with the control device by using a connection-oriented transmission protocol or a transmission protocol supporting multi-homing.

Wherein, the switching device can establish a connection with the control device by adopting a connection-oriented transmission protocol or a transmission protocol supporting multi-homing, and the connection can be used to transmit data during initialization, and can also be used to transmit signaling messages including data on the forwarding plane.

202a. The switching device receives the configuration information sent by the control device through a connection established with the control device using a connection-oriented transport protocol or a transport protocol supporting multi-homing.

Wherein, after the switching device establishes a connection with the control device by adopting a connection-oriented transmission protocol or a transmission protocol supporting multi-homing, the switching device can receive configuration information sent by the control device through the connection. The configuration information includes the corresponding relationship between the type of signaling message and the transmission protocol used to send this type of signaling message. Specifically, it can be: for signaling messages containing forwarding plane data, use connectionless transmission For the signaling message with configuration function, the transmission protocol supporting multi-homing is used for transmission; for the signaling message with control function, the connection-oriented transmission protocol is used for transmission. The configuration information can be It is configured in the control device by the administrator in advance, or it can be generated by the control device according to the actual application scenario, and then the control device can send the configuration information to the switching device during system initialization, so that the switching device can configure different types of switches according to the configuration information. The signaling message is transmitted using an unused transmission protocol.

It should be noted that, in the embodiment of the present invention, step 201a and step 202a are optional steps, that is to say, the switching device can select different transmission protocols according to different types of signaling packets according to the default configuration information to perform data transmission. transmission. And in step 201a, the transmission protocol used by the switching device to establish a connection with the control device can be selected according to the requirements of the actual application scenario. A transport layer security protocol (Transport Layer Security Protocol, TLS) establishes a secure connection with the control device. In this embodiment of the present invention, there is no limitation on the transmission protocol used when the switching device establishes a connection with the control device in step 201a.

203a. The switching device determines the type of the signaling packet.

Wherein, when the switching device needs to send a signaling message to the control device, the type of the signaling message can be determined first.

204a. According to the configuration information, if the signaling packet includes forwarding plane data, the switching device sends the signaling packet to the control device through a connectionless transmission protocol.

Wherein, when the switching device determines that the signaling message is a signaling message including data on the forwarding plane, the switching device may send the signaling message to the control device through a connectionless transmission protocol according to the configuration information, wherein when the connectionless transmission When the protocol is UDP, the control device needs to open the corresponding monitoring interface, so that when the switching device sends a signaling message to the control device through the UDP protocol, the control device can receive the signaling message sent by the switching device through the monitoring interface. Wherein, for the existing OpenFlow protocol, the signaling message including forwarding plane data may be a packet-in message (Packet-In Message) or a packet-out message (Packet-Out Message).

205a. According to the configuration information, if the signaling packet is a signaling packet with a configuration function, the switching device sends the signaling packet to the control device through a transmission protocol supporting multi-homing.

Wherein, when the switching device determines that the signaling message is a signaling message with a configuration function, the switching device may send the signaling message to the control device through a transmission protocol supporting multi-homing according to the configuration information. Wherein, for the existing OpenFlow protocol, the signaling message with the configuration function may be a switch configuration (SwitchConfiguration), a flow table configuration message (Flow Table Configuration), an experiment message (Experimenter) and the like.

206a. According to the configuration information, if the signaling packet is a signaling packet with a control function, the switching device sends the signaling packet to the control device through a connection-oriented transmission protocol.

Wherein, when the switching device determines that the signaling message is a signaling message with a control function, the switching device may send the signaling message to the control device through a connection-oriented transport protocol according to the configuration information. Among them, for the existing OpenFlow protocol, the signaling message with control function can be: except the signaling message including forwarding plane data in step 204 and the signaling message with configuration function in step 206 other signaling messages.

It should be noted that, in the embodiment of the present invention, the connectionless transmission protocol may be UDP, the transmission protocol supporting multi-homing may be Stream Control Transmission Protocol (Stream Control Transmission Protocol, SCTP), and the connection-oriented transmission protocol may be TCP protocol, the embodiment of the present invention does not limit the specific transmission protocol used here.

It should be noted that, in the embodiment of the present invention, after the switching device determines the type of the signaling packet, any one of step 204a, step 205a, and step 206a may be performed according to the type of the signaling packet.

In the message transmission method provided by the embodiment of the present invention, when the switching device needs to send a signaling message to the control device, it sends the signaling message including forwarding plane data to the control device through a connectionless transmission protocol. The device improves the interactive performance between the switch and the controller, and at the same time reduces the occurrence of head-to-head blocking that may be caused by using the TCP transmission protocol.

In another application scenario of the embodiment of the present invention, when the first OpenFlow device is a control device and the second OpenFlow device is a switching device, as shown in FIG. 3, the method may include:

201b. The control device establishes a connection with the switching device by using a connection-oriented transport protocol or a transport protocol supporting multi-homing.

202b. The control device sends configuration information to the switching device through a connection established with the switching device by using a connection-oriented transmission protocol or a multi-homing-supporting transmission protocol.

Among them, the configuration information can be pre-configured in the control device by the administrator. After the control device establishes a connection with the switching device using a connection-oriented transport protocol or a multi-homed transport protocol, the configuration information can be sent to the switching device through the connection, so that Because the switching device can select different transmission protocols for different types of signaling packets for transmission according to the configuration information.

Optionally, before the control device sends the configuration information to the switching device through the connection established with the switching device by using a connection-oriented transport protocol or a transport protocol supporting multi-homing, the control device generates the configuration information.

Specifically, the control device may generate the configuration information according to the application type of the data forwarded by the switching device, such as a voice over Internet Phone (Voice over Internet Phone, VoIP) application type. The application type can be obtained through negotiation between the switching device and the control device, or can be an option configured by the administrator.

203b. The control device determines the type of the signaling packet.

204b. According to the configuration information, if the signaling packet is a signaling packet including forwarding plane data, the control device sends the signaling packet to the switching device through a connectionless transmission protocol.

205b. According to the configuration information, if the signaling packet is a signaling packet with a configuration function, the control device sends the signaling packet to the switching device through a transmission protocol supporting multi-homing.

206b. According to the configuration information, if the signaling packet is a signaling packet with a control function, the control device sends the signaling packet to the switching device through a connection-oriented transport protocol.

It should be noted that, for the specific description in step 201b-step 206b in the embodiment of the present invention, you can refer to the specific description of the corresponding content in step 201a-step 206a in the embodiment of the present invention, and the embodiment of the present invention will not go into details here. .

In the message transmission method provided by the embodiment of the present invention, when the control device needs to send a signaling message to the switching device, it sends the signaling message including forwarding plane data to the switching device through a connectionless transmission protocol. The device improves the interactive performance between the switch and the controller, and at the same time reduces the occurrence of head-to-head blocking that may be caused by using the TCP transmission protocol.

According to the first OpenFlow device provided in the embodiment of the present invention, according to the type of the signaling message, a different transmission protocol is selected to send the signaling message to the second OpenFlow device, the following extensions can be made to the embodiment of the present invention, as shown in Figure 4 For details, please refer to the following steps:

301. The switching device sends a first connection establishment request to the control device, so as to establish a first transmission channel with the control device, and then transmit a signaling message to be transmitted during initialization between the control device and the first transmission channel through the first transmission channel.

Wherein, the switching device may first send a first connection establishment request to the control device so as to establish a first transmission channel with the control device. The first transmission channel is mainly used to ensure the transmission of signaling messages during initialization, but it may also be used The transmission of other signaling messages in the subsequent transmission process. Wherein the first connection establishment request can be a TCP connection establishment request, so that the first transmission channel can be established by using the TCP protocol between the switching device and the control device, and then transmit the information that needs to be transmitted during initialization through the first transmission channel and the control device Signaling message.

It should be noted that in the embodiment of the present invention, the transmission protocol used when the switching device sends the first connection establishment request to the control device can be selected according to the requirements of the actual application scenario. In order to ensure the security in the device, you can choose to use the TLS protocol to establish a secure transmission channel with the control device. This embodiment of the present invention does not limit the transmission protocol used when sending the first connection establishment request.

302. The control device acquires first information, and determines a configuration policy according to the first information.

Wherein, the control device may acquire first information such as application type, and then determine a configuration policy according to the first information. Specifically, the first information includes but is not limited to the application type, the application type refers to the type of data forwarded by the switching device, such as the VoIP application type, and the first information may be obtained by the switching device through negotiation with the control device, or may be is an option configured by the administrator. The configuration strategy determined according to the first information includes but is not limited to: the type of transmission channel to be established between the switching device and the control device, the transmission protocol used to establish each transmission channel between the switching device and the control device, the switching device and the control device The number of transmission channels of each type established between them. The transmission protocols include but are not limited to TCP, UDP, and SCTP.

Optionally, the configuration policy may be pre-configured in the control device, and step 302 may not be executed at this time.

303. The switching device receives the configuration policy sent by the control device through the first transmission channel.

Wherein, after the control device determines the configuration policy according to the first information, it can send the configuration policy to the switching device through the first transmission channel, and at this time, the switching device can receive the configuration policy sent by the control device through the first transmission channel.

304. The switching device sends at least two connection establishment requests to the control device according to the configuration policy, so as to establish at least two transmission channels with the control device.

Wherein, the switching device may send at least two connection establishment requests to the control device according to the configuration strategy. For example, when the types of transmission channels to be established between the switching device and the control device included in the configuration channel, and the transmission protocol used to establish the signaling channel is TCP, the transmission protocol used to establish the data channel is UDP, the protocol used to establish the configuration channel is SCTP, and the number of each type of transmission channel is 1, if in step 201 The first transmission channel has been established between the switching device and the control device using the TCP protocol, so the first channel can be used as a signaling channel; for the establishment of the configuration channel, the switching device can send an SCTP connection establishment request to the control device, In order to establish an SCTP transmission channel with the control device; for the establishment of a data channel, since UDP is a connectionless transmission protocol, it is only necessary for the control device to directly open the corresponding monitoring interface, so that the control device can pass through the monitoring interface. Receive the signaling message sent by the switching device through the data channel. Among them, for the signaling channel, it can mainly be used to transmit signaling messages that require high reliability. The reason for using the TCP protocol is to maintain compatibility with existing equipment on the one hand, and to ensure Reliable transmission of signaling messages; for data channels, the UDP protocol can be used to establish, this protocol can greatly simplify the state machine of the forwarding plane, thereby improving performance, and the reliability of the message can be guaranteed by the upper layer application ; For the configuration channel, the SCTP protocol is used because it is suitable for signaling transmission, supports selective confirmation, and does not cause the problem of TCP protocol head-to-head blocking.

It should be noted that, in the embodiment of the present invention, configuration strategies are only illustrated as examples, and specific configuration strategies may be set according to different requirements of actual application scenarios, which are not limited in this embodiment of the present invention.

305. The switching device receives the preset rule sent by the control device through the first transmission channel.

Wherein, the preset rules are pre-configured in the control device, and the control device can send the preset rules to the switching device, and then the switching device can receive the preset rules sent by the control device through the first transmission channel. The preset rule may be one or more of the following rules: select the target transmission channel according to the type of signaling message, select the target transmission channel according to the maximum number of signaling messages sent by the transmission channel per unit time, The target transmission channel and the like are selected according to the type of the device generating the signaling message.

306. When the switching device needs to send a signaling message to the control device, the switching device selects a target transmission channel from the first transmission channel and at least two transmission channels according to preset rules, and sends a signaling message to the control device through the target transmission channel. command message.

Wherein, when the switching device needs to send a signaling message to the control device, it can first select a target transmission channel for the signaling message from the first transmission channel and at least two transmission channels according to preset rules, and then pass the The target transmission channel sends the signaling message to the control device.

For example, the preset rule is: select the target transmission channel according to the type of the signaling message. When the switching device needs to send a signaling message to the control device, the switching device can send the signaling message to the control device according to the type of the signaling message. Select the transmission channel corresponding to the type of the signaling message from the first transmission channel and at least two transmission channels as the target transmission channel, and then send the signaling message to the control device through the target transmission channel, for example, for the OpenFlow protocol For example, the messages in the OpenFlow protocol can be classified in advance, which can be: for Switch Configuration, Flow Table Configuration, Experimenter and other types of signaling messages, they are transmitted through the transmission channel established by the SCTP protocol; for Packet- In Message, Packet-Out Message, this type of signaling message is transmitted through the transmission channel established by using the UDP protocol; for other types of signaling messages in the OpenFlow protocol, it is transmitted through the transmission channel established by the TCP protocol. For another example, the preset rule is: select the target transmission channel according to the maximum number of signaling messages sent by the transmission channel per unit time. Whether the number of signaling messages transmitted by a certain transmission channel in one transmission channel and at least two transmission channels exceeds the maximum value, if not, then select the transmission channel as the target transmission channel to send the signaling message to the control device The first transmission channel and the transmission channel with higher reliability among at least two transmission channels can be preferentially selected for judgment. For example, the number of signaling messages transmitted by the transmission channel established by the TCP protocol can be first judged per unit time Whether it exceeds the maximum value, if not, select the transmission channel established by the TCP protocol as the target transmission channel to transmit the signaling message, if it exceeds, you can select the transmission channel with lower reliability than the transmission channel established by the TCP protocol The other transmission channel of the network is used as the target transmission channel to transmit the signaling message. Of course, it is also possible to first select a transmission channel suitable for the signaling message according to the type of the signaling message, and then determine whether the number of signaling messages transmitted by the selected transmission channel in a unit time exceeds the maximum value, and then If not, use the transmission channel as the target transmission channel to send the signaling message to the control device.

It should be noted that in the embodiment of the present invention, only the preset rules for selecting the target transmission channel are given as examples. The selection of the target transmission channel in a specific application scenario can be configured according to the requirements of the actual application scenario. The embodiment of the present invention Here, there is no restriction on the selection condition of the target transmission channel.

307. When the control device needs to send a signaling message to the switching device, the control device selects a target transmission channel from the first transmission channel and at least two transmission channels according to preset rules, and sends a signaling message to the switching device through the target transmission channel. command message.

It should be noted that, for the specific description of the parameters in step 306 in the embodiment of the present invention, you can refer to the specific description of the corresponding parameters in step 305 in the embodiment of the present invention. The execution of step 306 has no sequence, and the embodiment of the present invention does not limit the sequence of execution of step 305 and step 306 here.

In the message transmission method provided by the embodiment of the present invention, the switching device uses at least two different transmission protocols to send at least two connection establishment requests to the control device according to the configuration strategy, so as to establish at least two transmission channels with the control device. When the device needs to send a signaling message to the control device, the switching device can select a target transmission channel from at least two transmission channels, and then send a signaling message to the control device through the target transmission channel. By using different transmission channels from at least two The target transmission channel selected in the transmission channel established by the protocol sends a signaling message to the control device, which effectively reduces the performance loss caused to the switching device during the message reporting process, and at the same time reduces the use of a specific transmission protocol. impact on packet transmission.

Another embodiment of the present invention provides a message transmission device. As shown in FIG. 5 , the device includes: a determining unit 41 and a first sending unit 42 .

A determining unit 41, configured to determine the type of the signaling message.

The first sending unit 42 is configured to send the signaling message through a connectionless transmission protocol if the signaling message obtained by the determining unit 41 is a signaling message including forwarding plane data according to the configuration information to the second OpenFlow device.

Further, as shown in FIG. 6 , the device may further include: a second sending unit 43 .

The second sending unit 43 is configured to, according to the configuration information, if the signaling message obtained by the determining unit 41 is a signaling message with a configuration function, send the signaling through a transmission protocol supporting multi-homing Send the message to the second OpenFlow device.

Further, the device may further include: a third sending unit 44 .

The third sending unit 44 is configured to send the signaling message through a connection-oriented transmission protocol if the signaling message obtained by the determining unit 41 is a signaling message with a control function according to the configuration information. text to the second OpenFlow device.

Further, the device is a switching device, and the second OpenFlow device is a control device.

The device may also include: a receiving unit 45 .

The receiving unit 45 is configured to receive the configuration information sent by the configuration device.

Further, the receiving unit 45 is specifically configured to: use a connection-oriented transmission protocol or a transmission protocol supporting multi-homing to establish a connection with the configuration device, and receive the configuration sent by the configuration device through the connection. information.

Further, the configuration device is the second OpenFlow device.

Further, the device is a control device, and the second OpenFlow device is a switching device.

The device may further include: a fourth sending unit 46 .

The fourth sending unit 46 is configured to send the configuration information to the second OpenFlow device.

Further, the configuration information is pre-configured in the device; or, the device may further include: a generating unit 47 .

The generating unit 47 is configured to generate the configuration information before the fourth sending unit 46 sends the configuration information to the second OpenFlow device.

Further, the fourth sending unit 46 is specifically configured to: establish a connection with the second OpenFlow device using a connection-oriented transport protocol or a transport protocol supporting multi-homing, and send a message to the second OpenFlow device through the connection. The configuration information sent by the device.

The message transmission device provided by the embodiment of the present invention, when it is necessary to send a signaling message to the second OpenFlow device, sends the signaling message including forwarding plane data to the second OpenFlow device through a connectionless transmission protocol. The second OpenFlow device improves the interactive performance between the switch and the controller, and at the same time reduces the occurrence of head-to-head blocking that may be caused by using the TCP transport protocol.

Another embodiment of the present invention provides another message transmission device. As shown in FIG. 7 , the device includes: a communication unit 51 and a processor 52 .

The communication unit 51 is used to interact with external network elements.

The processor 52 is configured to determine the type of the signaling message. According to the configuration information, if the signaling message is a signaling message including forwarding plane data, the communication unit 51 uses a connectionless transmission protocol to send the The signaling message is sent to the second OpenFlow device.

Further, the processor 52 is further configured to, according to the configuration information, if the signaling message is a signaling message with a configuration function, send it through the communication unit 51 using a transmission protocol supporting multi-homing The signaling message is sent to the second OpenFlow device.

Further, the processor 52 is further configured to, according to the configuration information, if the signaling message is a signaling message with a control function, the communication unit 51 uses a connection-oriented transmission protocol to send the Send the signaling message to the second OpenFlow device.

Further, the device is a switching device, and the second OpenFlow device is a control device.

The processor 52 is further configured to receive the configuration information sent by the configuration device through the communication unit 51 .

Further, the processor 52 is also configured to establish a connection with the configuration device through the communication unit 51 using a connection-oriented transport protocol or a transport protocol supporting multi-homing, and use the communication unit 51 to adopt the Connect to receive the configuration information sent by the configuration device.

Further, the configuration device is the second OpenFlow device.

Further, the device is a control device, and the second OpenFlow device is a switching device.

The processor 52 is further configured to send the configuration information to the second OpenFlow device through the communication unit 51 .

Further, the configuration information is pre-configured in the device; or, the processor 52 is further configured to generate the configuration information before sending the configuration information to the second OpenFlow device through the communication unit 51 information.

Further, the processor 52 is also configured to establish a connection with the second OpenFlow device through the communication unit 51 using a connection-oriented transmission protocol or a transmission protocol supporting multi-homing, and through the communication unit 51 , using the configuration information sent by the connection to the second OpenFlow device.

The message transmission device provided by the embodiment of the present invention, when it is necessary to send a signaling message to the second OpenFlow device, sends the signaling message including forwarding plane data to the second OpenFlow device through a connectionless transmission protocol. The second OpenFlow device improves the interactive performance between the switch and the controller, and at the same time reduces the occurrence of head-to-head blocking that may be caused by using the TCP transport protocol.

Another embodiment of the present invention provides a message transmission system, as shown in FIG. 8 , including: a message transmission device 61 and a second OpenFlow device 62; The second OpenFlow device 62 is a control device.

The message transmission device 61 is configured to determine the type of the signaling message; according to the configuration information, if the signaling message is a signaling message including forwarding plane data, the signaling message is sent through a connectionless transmission protocol Send the signaling message to the second OpenFlow device 62; if the signaling message is a signaling message with a configuration function, send the signaling message to the second OpenFlow device 62 through a transmission protocol supporting multi-homing; If the signaling packet is a signaling packet with a control function, the signaling packet is sent to the second OpenFlow device 62 through a connection-oriented transport protocol.

The second OpenFlow device 62 is configured to receive the signaling message sent by the message transmission device 61 through a connectionless transmission protocol; receive the signaling message sent by the message transmission device 61 through a multi-homed transmission protocol message: receiving a signaling message sent by the message transmission device 61 through a connection-oriented transmission protocol.

In the message transmission system provided by the embodiment of the present invention, when the message transmission device needs to send a signaling message to the second OpenFlow device, the signaling message including forwarding plane data is sent through a connectionless transmission protocol The message is sent to the second OpenFlow device, which improves the interaction performance between the switch and the controller, and at the same time reduces the occurrence of head-to-head blocking that may be caused by using the TCP transmission protocol.

Another embodiment of the present invention provides a message transmission system, as shown in FIG. 9 , including: a message transmission device 71 and a second OpenFlow device 72; wherein, the message transmission device 71 is a control device, and the The second OpenFlow device 72 is a switching device.

The message transmission device 71 is configured to determine the type of the signaling message; according to the configuration information, if the signaling message is a signaling message including forwarding plane data, the signaling message is sent through a connectionless transmission protocol. Send the signaling message to the second OpenFlow device 72; if the signaling message is a signaling message with a configuration function, send the signaling message to the second OpenFlow device 72 through a transmission protocol supporting multi-homing; If the signaling packet is a signaling packet with a control function, the signaling packet is sent to the second OpenFlow device 72 through a connection-oriented transport protocol.

The second OpenFlow device 72 is configured to receive the signaling message sent by the message transmission device 71 through a connectionless transmission protocol; receive the signaling message sent by the message transmission device 71 through a multi-homed transmission protocol message: receiving a signaling message sent by the message transmission device 71 through a connection-oriented transmission protocol.

In the message transmission system provided by the embodiment of the present invention, when the message transmission device needs to send a signaling message to the second OpenFlow device, the signaling message including forwarding plane data is sent through a connectionless transmission protocol The message is sent to the second OpenFlow device, which improves the interaction performance between the switch and the controller, and at the same time reduces the occurrence of head-to-head blocking that may be caused by using the TCP transmission protocol.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be realized by means of software plus necessary general-purpose hardware, and of course also by hardware, but in many cases the former is a better embodiment . Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product is stored in a readable storage medium, such as a floppy disk of a computer , a hard disk or an optical disk, etc., including several instructions for enabling a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in various embodiments of the present invention.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. All should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (20)

1. A method for packet transmission, comprising:

the first OpenFlow device determines the type of the signaling message;

and the first OpenFlow device sends the signaling message to a second OpenFlow device through a connectionless transmission protocol according to the configuration information if the signaling message is a signaling message including forwarding plane data.

2. The method of claim 1, further comprising:

and the first OpenFlow device sends the signaling message to the second OpenFlow device through a multi-host supporting transmission protocol according to the configuration information if the signaling message is a signaling message with a configuration function.

3. The method of claim 1, further comprising:

and the first OpenFlow device sends the signaling message to the second OpenFlow device through a connection-oriented transmission protocol according to the configuration information if the signaling message is a signaling message with a control function.

4. The method according to any of claims 1-3, wherein the first OpenFlow device is a switching device, and the second OpenFlow device is a control device;

the method further comprises the following steps:

and the first OpenFlow device receives the configuration information sent by the configuration device.

5. The method of claim 4, wherein the receiving, by the first OpenFlow device, the configuration information sent by a configuration device comprises:

the first OpenFlow device establishes connection with the configuration device by adopting a connection-oriented transmission protocol or a transmission protocol supporting multi-host;

and the first OpenFlow device receives the configuration information sent by the configuration device through the connection.

6. The method of claim 4, wherein the configuration device is the second OpenFlow device.

7. The method according to any of claims 1-3, wherein the first OpenFlow device is a control device and the second OpenFlow device is a switch device;

the method further comprises the following steps:

and the first OpenFlow device sends the configuration information to the second OpenFlow device.

8. The method of claim 7,

the configuration information is pre-configured in the first OpenFlow device;

or before the first OpenFlow device sends the configuration information to the second OpenFlow device, the method further includes:

the first OpenFlow device generates the configuration information.

9. The method of claim 7, wherein sending the configuration information from the first OpenFlow device to the second OpenFlow device comprises:

the first OpenFlow device establishes connection with the second OpenFlow device by adopting a connection-oriented transmission protocol or a transmission protocol supporting multi-host;

and the first OpenFlow device sends the configuration information to the second OpenFlow device through the connection.

10. A message transmission apparatus, the apparatus comprising:

a determining unit, configured to determine a type of the signaling packet;

and the first sending unit is used for sending the signaling message to the second OpenFlow device through a connectionless transmission protocol according to the configuration information if the signaling message obtained by the determining unit is the signaling message containing forwarding plane data.

11. The apparatus of claim 10, further comprising:

and a second sending unit, configured to send, according to the configuration information and if the signaling packet obtained by the determining unit is a signaling packet with a configuration function, the signaling packet to the second OpenFlow device through a multi-host supporting transport protocol.

12. The apparatus of claim 10, further comprising:

and a third sending unit, configured to send, according to the configuration information, the signaling message to the second OpenFlow device through a connection-oriented transport protocol if the signaling message obtained by the determining unit is a signaling message with a control function.

13. The apparatus according to any of claims 10-12, wherein the apparatus is a switch device, and the second OpenFlow device is a control device;

the device further comprises:

and the receiving unit is used for receiving the configuration information sent by the configuration equipment.

14. The apparatus according to claim 13, wherein the receiving unit is specifically configured to:

establishing connection with the configuration equipment by adopting a connection-oriented transmission protocol or a transmission protocol supporting multi-host;

and receiving the configuration information sent by the configuration equipment through the connection.

15. The apparatus of claim 13, wherein the configuration device is the second OpenFlow device.

16. The apparatus according to any of claims 10-12, wherein the apparatus is a control device, and the second OpenFlow device is a switch device;

the device further comprises:

a fourth sending unit, configured to send the configuration information to the second OpenFlow device.

17. The apparatus of claim 16,

the configuration information is pre-configured in the device;

alternatively, the apparatus further comprises:

a generating unit, configured to generate the configuration information before the fourth sending unit sends the configuration information to the second OpenFlow device.

18. The apparatus according to claim 16, wherein the fourth sending unit is specifically configured to:

establishing connection with the second OpenFlow device by adopting a connection-oriented transmission protocol or a transmission protocol supporting multi-host;

the configuration information is sent to the second OpenFlow device through the connection.

19. A message transmission system, comprising:

the message transmitting device according to any of claims 10-15; and a second OpenFlow device;

the message transmission device is a switching device, and the second OpenFlow device is a control device.

20. A message transmission system, comprising:

the message transmitting apparatus according to any of claims 10-12 and 16-18;

and a second OpenFlow device;

the message transmission device is a control device, and the second OpenFlow device is a switching device.