WO2015188331A1

WO2015188331A1 - 转发控制方法、驱动器及sdn网络 forwarding control method, driver and sdn network

Info

Publication number: WO2015188331A1
Application number: PCT/CN2014/079671
Authority: WO
Inventors: 倪慧
Original assignee: 华为技术有限公司
Priority date: 2014-06-11
Filing date: 2014-06-11
Publication date: 2015-12-17
Also published as: CN105379198A

Abstract

一种转发控制方法、驱动器及软件定义网络，通过驱动器将控制器生成的第一转发控制信令转换为第二转发控制信令，该第二转发控制信令符合转发器所支持的转发控制协议的格式要求；进而驱动器将第二转发控制信令发送至对应的转发器，因此，本申请实施例不再需要控制器支持内置插件机制，只需要在软件定义网络中设置相应的驱动器，就可以实现同一控制器对任意转发器的转发控制，应用范围大大增加。另外，本申请实施例中，通过改变不同类型的驱动器、控制器和转发器三者之间的连接关系，即可实现驱动器、转发器和控制器的复用，不需要针对每一个控制器、每一个转发器设置一个驱动器，对SDN网络及相关设备的改动量小，成本低。 A forwarding control method, driver and software-defined network (SDN), the driver convertsing a first forwarding control signaling generated by a controller into a second forwarding control signaling, the second forwarding control signaling complying with a format requirement of a forwarding control protocol supported by a forwarder; the driver further sendsing the second forwarding control signaling to a corresponding forwarder. Therebyfore, an embodiment of the present application no longer requires the controller to support a built-in plug-in mechanism, and it is only necessary to disposes a corresponding driver in the software-defined network to enable the same controller to conduct carry out forwarding control of any forwarder, thus greatly increasing the scope of application range. In addition, in an embodiment of the present application, changing the connection relationships between different types of drivers, controllers and forwarders can realizes multiplexing of the drivers, the forwarders and the controllers, without the need of disposinghavingneeding to disposeprovide one driver for each controller and each forwarder, havingwith only small changes into the SDN network and related devices, and low costs.

Description

Forwarding control method, driver and SDN network

TECHNICAL FIELD The present invention relates to the field of communications technologies, and in particular, to a forwarding control method, a driver, and a Software-Defined Network (SDN) using the same. BACKGROUND A complete communication network is often composed of a plurality of network devices, such as routers, gateways, switches, firewalls, and various types of servers. Different network devices communicate through corresponding network protocols. In order to improve the manageability and deployment flexibility of network devices, existing communication networks are increasingly adopting SDN networks. In the SDN network, the protocol control and packet forwarding logic of the network device are decoupled into two parts: a controller that implements the protocol control logic and a repeater that implements the packet forwarding logic. On the one hand, centralized deployment of controllers corresponding to different network devices can conveniently implement centralized control and maintenance of the network and improve network management efficiency. On the other hand, the decoupled demultiplexer has a simple structure and is convenient for implementing packets. Optimization of the forwarding function.

In an SDN network, different controllers may support different control forwarding protocols, and different repeaters may also support different control forwarding protocols. Generally, a plurality of plug-ins supporting different control forwarding protocols are set in the controller; the controller calls the corresponding plug-in to format and encapsulate the forwarding control signaling according to the type of control forwarding protocol supported by the target repeater, and the encapsulated forwarding control signal The target can be successfully received and executed by the target repeater, thereby completing the corresponding packet forwarding service. The method controls a plurality of different transponders through the same controller, which can improve the control flexibility of the controller. The above implementation of the function extension of the controller through the built-in plug-in has certain limitations and cannot be applied to a controller that does not support the built-in plug-in mechanism. SUMMARY OF THE INVENTION In the embodiments of the present application, a forwarding control method, a driver, and an SDN network are provided to solve the problem that a method for extending a function of a controller by using a built-in plug-in is limited in application scope. In order to solve the above technical problem, the embodiment of the present application discloses the following technical solutions: In a first aspect, a forwarding control method based on a software-defined network SDN is provided, where the SDN network includes a forwarder that implements packet forwarding, and a controller that performs forwarding control on the repeater; The SDN network further includes at least one driver that implements drive control on the repeater; the forwarding control method includes: the controller generates first forwarding control signaling according to a forwarding rule, and the first forwarding control Transmitting, by the first control forwarding protocol, to the first driver connected to the controller in the driver; the first driver converting the received first forwarding control signaling into a format requirement that conforms to the second control forwarding protocol The second forwarding control signaling is sent to the corresponding forwarder by using the second control forwarding protocol; wherein the first control forwarding protocol is a control forwarding protocol supported by the controller; The second control forwarding protocol is a control forwarding protocol supported by the repeater. With reference to the first aspect, in a first possible implementation manner of the first aspect, before the controller sends the first forwarding control instruction, the forwarding control method further includes: the controller determining the forwarding corresponding to the forwarding rule At least one driver matching the type of the device acts as the first driver and establishes a connection with the first driver. With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the controller determines, by using, at least one driver that matches a type of the forwarding device corresponding to the forwarding rule The first driver includes: the controller determining, according to the registration message sent by each driver and the type identifier of the transponder, the type of the transponder corresponding to the forwarding rule, and determining the driver as the The first driver; wherein the registration message includes a type identifier of one or more types of repeaters supported by the corresponding driver; the type identifier includes at least one of the following: a repeater model, a control forwarding protocol type, and a flow table. Type template TTP and negotiable data path model DM. In conjunction with the first possible implementation of the first aspect, in a third possible implementation manner of the first aspect, the controller establishes a connection with the first driver, including: the controller is configured by means of module loading or signaling negotiation. The first driver establishes a connection. With reference to the first aspect, in a fourth possible implementation manner of the first aspect, before the controller sends the first forwarding control instruction, the forwarding control method further includes: the parameter of the forwarder of the driver according to the service thereof The information configures itself as a virtual forwarder corresponding to the transponder it serves; the virtual repeater acts as a first driver and establishes a connection with the controller. With reference to the first aspect, or the first possible implementation manner of the first aspect, or the second possible implementation manner of the first aspect, or the third possible implementation manner of the first aspect, or the fourth possible In a fifth possible implementation manner of the first aspect, the first forwarding device that the first driver receives the first forwarding control And converting the signaling to the second forwarding control signaling that meets the format requirement of the second control forwarding protocol, including: when the repeater includes multiple, the first driver forwards according to the first control forwarding protocol and the second control The preset mapping relationship between the protocols converts the first forwarding control signaling into multiple second forwarding control signalings corresponding to different repeaters. With reference to the first aspect, or the first possible implementation manner of the first aspect, or the second possible implementation manner of the first aspect, or the third possible implementation manner of the first aspect, or the fourth possible In a sixth possible implementation manner of the first aspect, the forwarding control method further includes: determining, by the first driver, the received first forwarding control signaling according to the parameter information of the forwarder stored by the first driver Whether the corresponding forwarding rule conforms to the function of the corresponding forwarder; if the forwarding rule corresponding to the first forwarding control signaling does not conform to the function of the corresponding forwarder, the first driver returns a control failure message to the controller, otherwise performing the receiving The first forwarding control signaling to the second forwarding control signaling is converted to meet the format requirements of the second control forwarding protocol. With reference to the first aspect, or the first possible implementation manner of the first aspect, or the second possible implementation manner of the first aspect, or the third possible implementation manner of the first aspect, or the fourth possible In a seventh possible implementation manner of the first aspect, the forwarding control method further includes: the driver generating parameter configuration signaling according to the parameter information of the forwarder stored by the driver, and sending the parameter configuration signaling Go to the appropriate repeater to configure and/or modify the parameters of the corresponding repeater. With reference to the first aspect, or the first possible implementation manner of the first aspect, or the second possible implementation manner of the first aspect, or the third possible implementation manner of the first aspect, or the fourth possible In an eighth aspect of the first aspect, the forwarding control method further includes: transmitting, and/or receiving, control signaling by using a preset interface protocol between different drivers connected to the same transponder; Transmitting and/or receiving control signaling between different drivers connected to the same transponder through a preset interface protocol, including at least one of the following: when the second driver connected to the transponder has a transponder parameter modification requirement The second driver sends parameter modification negotiation signaling to a third driver connected to the repeater; the third driver receives the parameter modification negotiation signaling, and requests the parameter modification negotiation signaling Returning a negotiation response message to the second driver when the parameter modification operation is performed; the second driver sends the third driver to the third driver Query signaling sharing information; receiving the third drive the shared signaling information query, and returns the corresponding information inquiry response message to the second driver based on the shared information query signaling. Combining the first aspect, or the first possible implementation of the first aspect, or the second possible aspect of the first aspect The implementation of the forwarding, or the third possible implementation of the first aspect, or the fourth possible implementation manner of the first aspect. In the ninth possible implementation manner of the first aspect, the forwarding control method further includes: Upon receiving the forwarding parameter query signaling sent by the controller, the driver generates corresponding forwarding parameter response information according to the parameter information of the forwarder stored by the controller, and feeds back the forwarding parameter response information to the controller.

In a second aspect, a software-defined network SDN is provided. The software-defined network SDN includes a controller, a repeater, and at least one driver. The controller is configured to: generate first forwarding control signaling according to a forwarding rule, and Forwarding control signaling is sent to a first driver connected to the controller in the driver by using a first control forwarding protocol; the driver is configured to: receive the first after being connected to the controller as the first driver Forwarding the control signaling, converting the received first forwarding control signaling into a second forwarding control signaling conforming to the format requirement of the second control forwarding protocol, and forwarding the second forwarding control signaling by using the second control The protocol is sent to the corresponding forwarder; wherein the first control forwarding protocol is a control forwarding protocol supported by the controller; and the second control forwarding protocol is a control forwarding protocol supported by the repeater. With reference to the second aspect, in a first possible implementation manner of the second aspect, the controller is further configured to: determine, as the first, at least one driver that matches a type of a forwarder corresponding to the forwarding rule a driver and establishing a connection with the first driver. With reference to the second aspect, in a second possible implementation manner of the second aspect, the driver is further configured to: configure itself as a virtual repeater corresponding to the transponder served by the transponder according to the parameter information of the transponder it serves And establishing the virtual forwarder as the first driver to establish a connection with the controller. With reference to the second aspect, or the first possible implementation manner of the second aspect, or the second possible implementation manner of the second aspect, in the third possible implementation manner of the second aspect, After the controller is connected, the driver is specifically configured to: when connected to multiple forwarders, perform the first forwarding control according to a preset mapping relationship between the first control forwarding protocol and the second control forwarding protocol The signaling is converted into a plurality of second forwarding control signalings corresponding to different transponders and sent to respective transponders. With reference to the second aspect, or the first possible implementation manner of the second aspect, or the second possible implementation manner of the second aspect, in the fourth possible implementation manner of the second aspect, After the controller is connected, the driver is further configured to: determine, according to the parameter information of the forwarder that is stored in the device, whether the forwarding rule corresponding to the received first forwarding control signaling conforms to the function of the corresponding forwarder; Forwarding control If the forwarding rule corresponding to the signaling does not meet the function of the corresponding forwarder, the control failure message is returned to the controller, otherwise the first forwarding control signaling received is converted into a format that meets the format requirements of the second control forwarding protocol. The second forwarding control signaling. With reference to the second aspect, or the first possible implementation manner of the second aspect, or the second possible implementation manner of the second aspect, in the fifth possible implementation manner of the second aspect, the driver is further configured to: The parameter information of the transponder stored by itself generates parameter configuration signaling, and sends the parameter configuration signaling to a corresponding transponder to configure and/or modify parameters of the corresponding transponder. With the fifth possible implementation of the second aspect, in a sixth possible implementation manner of the second aspect, the driver is further configured to: send, by using a preset interface protocol, control to another driver that is connected to the same transponder Signaling, and/or receiving control signaling sent by the other driver; wherein the sending the control signaling to the another driver includes at least one of: when the driver has a repeater parameter modification requirement Transmitting the parameter modification negotiation signaling to the another driver; transmitting the shared information query signaling to the another driver; and receiving the control signaling sent by the another driver, including at least one of the following: The other driver modifies the negotiation response information returned by the negotiation signaling according to the parameter; and receives an information query response message that is played by the another driver according to the shared information query signaling. With reference to the second aspect, or the first possible implementation manner of the second aspect, or the second possible implementation manner of the second aspect, in the seventh possible implementation manner of the second aspect, the driver is further configured to: When receiving the forwarding parameter query signaling sent by the controller, the corresponding forwarding parameter response information is generated according to the parameter information of the transponder stored by the controller, and the forwarding parameter response information is fed back to the controller. A third aspect provides a forwarding control method based on a software-defined network SD, where the SDN network includes a forwarder that implements packet forwarding, and a controller that performs forwarding control on the forwarder; The network further includes at least one driver that implements drive control of the repeater; the forwarding control method includes: the first driver that is connected to the controller in the driver receives a first forwarding control message sent by the controller through the first control forwarding protocol The first driver converts the received first forwarding control signaling into a second forwarding control signaling conforming to a format requirement of the second control forwarding protocol; the first driver uses the second forwarding control signaling Sending to the corresponding forwarder by using the second control forwarding protocol; wherein the first control forwarding protocol is a control forwarding protocol supported by the controller; The protocol is a control forwarding protocol supported by the repeater. With reference to the third aspect, in a first possible implementation manner of the third aspect, the forwarding control method further includes: the driver configuring itself to correspond to a transponder served by the transponder according to the parameter information of the transponder served by the driver a virtual forwarder, and the virtual forwarder is connected to the controller as the first driver. With reference to the third aspect, or the first possible implementation manner of the third aspect, in a second possible implementation manner of the third aspect, the first driver converts the received first forwarding control signaling into a second The second forwarding control signaling required to control the format of the forwarding protocol includes: when the repeater includes multiple, the first driver according to the preset mapping relationship between the first control forwarding protocol and the second control forwarding protocol, The first forwarding control signaling is converted into a plurality of second forwarding control signalings corresponding to different repeaters. With reference to the third aspect, or the first possible implementation manner of the third aspect, in a third possible implementation manner of the third aspect, the forwarding control method further includes: the first driver according to the transponder stored by the first The parameter information determines whether the forwarding rule corresponding to the received first forwarding control signaling conforms to the function of the corresponding forwarder; if the forwarding rule corresponding to the first forwarding control signaling does not conform to the function of the corresponding forwarder, the first driver Returning a control failure message to the controller, otherwise performing the conversion of the received first forwarding control signaling into a second forwarding control signaling conforming to the format requirement of the second control forwarding protocol. With reference to the third aspect, or the first possible implementation manner of the third aspect, in the fourth possible implementation manner of the third aspect, the forwarding control method further includes: the driver according to the parameter information of the transponder stored by the driver Generating parameter configuration signaling, and transmitting the parameter configuration signaling to a corresponding repeater to configure and/or modify parameters of the corresponding repeater. With the third aspect, or the first possible implementation manner of the third aspect, in the fifth possible implementation manner of the third aspect, the forwarding control method further includes: the driver is connected to the connected device by using a preset interface protocol Another driver having the same transponder transmits control signaling, and/or receives control signaling sent by the other driver; wherein the driver sends control signaling to the other driver, including at least one of the following: Transmitting parameter modification negotiation signaling to the another driver when the driver has a repeater parameter modification requirement; transmitting shared information query signaling to the another driver; the driver receiving the control sent by the another driver The signaling includes at least one of the following: receiving the negotiation response information returned by the another driver according to the parameter modification negotiation signaling; and receiving an information query response message played by the another driver according to the shared information query signaling. In combination with the third aspect, or the first possible implementation of the third aspect, the sixth possible aspect in the third aspect In an implementation manner, the forwarding control method further includes: when receiving the forwarding parameter query signaling sent by the controller, the driver generates corresponding forwarding parameter response information according to the parameter information of the forwarder stored by the driver, and the The forwarding parameter response information is fed back to the controller. A fourth aspect, a driver is provided; the driver is applied to a software-defined network SD, the SDN network includes a forwarder that implements packet forwarding, and a controller that performs forwarding control on the forwarder according to a forwarding rule; The driver includes: a signaling receiving unit, configured to: when the driver is connected to the controller as the first driver, receive the first forwarding control signaling sent by the controller through the first control forwarding protocol; and the signaling conversion unit is configured to: The first forwarding control signaling received by the signaling receiving unit is converted into a second forwarding control signaling that meets the format requirement of the second control forwarding protocol; the signaling sending unit is configured to use the second forwarding control signaling The first control forwarding protocol is a control forwarding protocol supported by the controller, and the second control forwarding protocol is a control forwarding protocol supported by the forwarder. With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, the driver further includes: a self-configuring unit, configured to configure itself to forward the service according to the parameter information of the forwarder of the driver service Corresponding virtual forwarder, and establishing the virtual forwarder as the first driver to establish a connection with the controller. With reference to the fourth aspect, or the first possible implementation manner of the fourth aspect, in a second possible implementation manner of the fourth aspect, the signaling is performed when the driver is connected as a first driver to multiple forwarders The converting unit is specifically configured to: convert the first forwarding control signaling into multiple second forwarding control signals corresponding to different repeaters according to a preset mapping relationship between the first control forwarding protocol and the second control forwarding protocol The signaling sending unit is configured to send the multiple second forwarding control signalings generated by the signaling conversion unit to the corresponding forwarders by using a corresponding second control forwarding protocol. With reference to the fourth aspect, or the fourth possible implementation manner of the fourth aspect, in a third possible implementation manner of the fourth aspect, the driver further includes: a signaling determining unit, configured to: according to the transponder stored by itself The parameter information is used to determine whether the forwarding rule corresponding to the received first forwarding control signaling conforms to the function of the corresponding forwarder; if the forwarding rule corresponding to the first forwarding control signaling does not meet the function of the corresponding forwarder, the controller is Returning the control failure message; otherwise, triggering the signaling conversion unit and/or the signaling unit. With reference to the fourth aspect, or the fourth possible implementation manner of the fourth aspect, in a fourth possible implementation manner of the fourth aspect, the driver further includes: a parameter configuration unit, configured to perform parameters of the forwarder according to the self The information generation parameter configures signaling, and sends the parameter configuration signaling to a corresponding repeater to configure and/or modify parameters of the corresponding repeater. With reference to the fourth aspect, or the fourth possible implementation manner of the fourth aspect, in a fifth possible implementation manner of the fourth aspect, the driver further includes: an information interworking unit, configured to connect to by using a preset interface protocol The other driver of the same transponder sends control signaling, and/or receives control signaling sent by the other driver; wherein, the sending the control signaling to the another driver includes at least one of the following: Transmitting parameter modification negotiation signaling to the other driver when the driver has a repeater parameter modification requirement; transmitting shared information query signaling to the another driver; receiving the control letter sent by the another driver The command includes at least one of the following: receiving the negotiation response information returned by the another driver according to the parameter modification negotiation signaling; and receiving an information query response message that is performed by the another driver according to the shared information query signaling. With reference to the fourth aspect, or the fourth possible implementation manner of the fourth aspect, in a sixth possible implementation manner of the fourth aspect, the driver further includes: a parameter query unit, configured to receive the forwarding sent by the controller When the parameter query signaling, the corresponding forwarding parameter response information is generated according to the parameter information of the transponder stored by itself, and the forwarding parameter response information is fed back to the controller. As can be seen from the foregoing technical solutions, the embodiment of the present application implements format conversion of forwarding control signaling between the controller and the forwarder by using a driver. When the controller needs to perform forwarding rule control on the forwarder, only the controller and the corresponding driver are needed. After the connection is established, the first forwarding control signaling generated by the controller may be sent to the corresponding driver, and then the first forwarding control signaling is converted by the driver into a second forwarding control message that meets the requirements of the forwarding and forwarding protocol of the forwarder. And sending the second forwarding control signaling to the forwarder to control the execution of the forwarding service. Therefore, the present application does not require the controller to have a built-in plug-in mechanism, which can implement signaling conversion between any controller and the repeater, and solves the problem that the application range of the prior art is limited. BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that it is common in the art. For the technicians, other drawings can be obtained based on these drawings without paying for creative labor.

FIG. 1 is a signal flow diagram of a forwarding control method based on an SDN network according to an embodiment of the present application; 2A is a schematic structural diagram of an SDN network in the prior art; FIG. 2B is a schematic structural diagram of an SDN network based on the structure shown in FIG. 2A according to an embodiment of the present application;

2C is a schematic structural diagram of another SDN network according to the structure shown in FIG. 2A according to an embodiment of the present disclosure; FIG. 2D is a schematic structural diagram of another SDN network based on the structure shown in FIG. 2A according to an embodiment of the present application;

FIG. 3 is a signal flow diagram of a forwarding control method based on the SDN network shown in FIG. 2B according to an embodiment of the present disclosure; FIG. 4 is a forwarding control method based on the SDN network shown in FIG. 2D according to an embodiment of the present application; FIG. 5 is a schematic diagram of a signal flow diagram of another SDN network-based forwarding control method according to an embodiment of the present disclosure; FIG. 6A is a schematic structural diagram of another SDN network according to an embodiment of the present application; FIG. 7 is a schematic diagram of a network structure of a software-defined network SDN according to an embodiment of the present disclosure; FIG. 8 is a schematic diagram of a network structure of a software-defined network SDN according to an embodiment of the present disclosure; A flow chart of a forwarding control method applied to an SDN network is provided. FIG. 9 is a flowchart of another forwarding control method applied to an SDN network according to an embodiment of the present disclosure; A flowchart of a forwarding control method applied to an SDN network; FIG. 11 is a schematic structural diagram of a driver applied to an SDN network according to an embodiment of the present disclosure; A schematic view of another configuration applied to the driver SDN network; FIG. 13 is a schematic view of a further application structure applied to the driver SDN network according to an embodiment. DETAILED DESCRIPTION OF THE INVENTION To achieve the purpose of the present application, the present application provides a forwarding control method, a driver, and an SDN network. In order to enable a person skilled in the art to better understand the solution of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Referring to FIG. 1, a signal flow diagram of a forwarding control method based on an SDN network according to Embodiment 1 of the present application is provided. The SDN network in this embodiment includes, in addition to the forwarder that implements packet forwarding in the prior art, and the controller that performs forwarding control on the forwarder according to the forwarding rule, and at least one device that implements drive control on the forwarder. driver. The specific process of the forwarding control method is as follows: Step S101: The controller generates first forwarding control signaling according to the forwarding rule. Step S102: The controller sends the first forwarding control signaling to the driver by using the first control forwarding protocol. a first driver connected to the controller; Step S103: The first driver converts the received first forwarding control signaling into a second forwarding control signaling that meets a format requirement of the second control forwarding protocol; Step S104: the first driver will The second forwarding control signaling is sent to the corresponding forwarder by using the second control forwarding protocol. In the first embodiment, the first control forwarding protocol is a control forwarding protocol supported by the controller; and the second control forwarding protocol is a control forwarding protocol supported by the repeater. For example, suppose the controller supports the network switching model protocol OpenFlow, and the repeater supports the One Platform Kit (OnePK) protocol; when the controller wants to control the repeater to perform some action (assuming the first forwarding action), the controller The first forwarding control signaling is generated according to the foregoing forwarding rule, that is, the first forwarding operation is performed by the forwarder. The first forwarding control signaling generated by the controller only supports the OpenFlow protocol. format requirement. The controller then sends the first forwarding control signaling to the first driver connected thereto through the OpenFlow protocol. After receiving the first forwarding control signaling, the first driver converts the second forwarding control signaling into a second forwarding control signaling conforming to the format requirement of the OnePK protocol, and sends the second forwarding control signaling to the corresponding forwarder through the OnePK protocol. . Therefore, the forwarder supporting the OnePK protocol can successfully parse the second forwarding control signaling, and complete the first forwarding action required by the controller according to the second forwarding control signaling. It can be seen from the foregoing embodiment that, in order to implement different transponders that support different protocols by the same controller, the first forwarding control signaling generated by the controller is format-converted by the driver, and then forwarded to the corresponding forwarding. The controller does not need to support the built-in plug-in mechanism. Therefore, the embodiment of the present application can be applied to any transponder, and the application range is greatly increased. In addition, in the embodiment of the present application, by changing the connection relationship between different types of drivers, controllers, and repeaters, multiplexing of the driver, the repeater, and the controller can be realized, and it is not required for each controller. Each transponder is equipped with a driver, which has a small amount of changes to the SDN network and related equipment, and low cost. In practical applications, a controller may need to perform forwarding control on multiple transponders supporting different protocols. As shown in FIG. 2A, a system structure diagram of an existing SDN network, controller C1 needs to have at least three transponders (such as The repeater R1, the repeater R2 and the repeater R3 shown in FIG. 2A perform forwarding control; for convenience of description, the control forwarding protocols supported by the controller C1, the repeater R1, the repeater R2, and the repeater R3 are respectively labeled as Pl. , P2.1, P2.2 and P P2.3. To implement the forwarding control of the system shown in FIG. 2A, the present application provides two specific embodiments as shown in FIG. 3 and FIG. 4; it should be noted that the implementation of the description described in FIG. 3, FIG. 4 and the related text below The examples are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present application without departing from the inventive scope are the scope of the present application.

FIG. 3 is a signal flow diagram of another forwarding control method based on the SDN network shown in FIG. 2B according to Embodiment 2 of the present application. To implement the control of the three transponders R1, R2, and R3 through a controller C1 in FIG. 2A, the SDN network in the second embodiment of the present application adds three drivers based on the structure shown in FIG. 2A, respectively: A driver D1 for signaling format conversion between P1 and P2.1, a driver D2 for implementing signaling format conversion between protocols P1 and P2.2, and a driver for implementing signaling format conversion between protocols P1 and P2.3 D3 (shown in FIG. 2B); correspondingly, the forwarding control method provided in Embodiment 2 of the present application specifically includes the following steps:

S201: Each driver sends a respective registration message to the controller, where the registration message includes at least one type identifier of one or more types of transponders supported by the corresponding driver; for example, the registration message sent by the driver D1 The type identifier of the forwarder R1 of the driver D1 should be included, indicating that the driver D1 can implement the control signaling relay of the controller C1 to the repeater R1; similarly, the registration message sent by the driver D2 includes at least the type identifier of the repeater R2, and the driver D3 The sent registration message contains at least the type identifier of the repeater R3. In practical applications, the above type identifier may adopt at least one of the following four types: a repeater model, a control forwarding protocol type supported by the repeater (such as OpenFlow/FORCES/OnePK, etc.), a TTP (Table Typing Pattern, a flow table type). Template) ID, and DM (Negotiable Datapath Model) ID.

In addition, in the embodiment of the present application, the driver sends the registration message to the controller, which can be implemented by at least one of the following two methods:

1) Each drive initiates a corresponding registration message to the controller when it starts up; 2) When the controller starts, it requests the corresponding drive to return by sending a broadcast message or a pre-configured address. Registration message.

S202: Each transponder is respectively connected to the controller, and reports the corresponding type identifier to the controller; S203: the controller generates the first forwarding control signaling according to the forwarding rule;

S204: The controller determines, according to the received registration message and the type identifier of each transponder, at least one driver that matches the type of the control object (controlled transponder) of the forwarding rule, and establishes a connection with the determined driver. In order to distinguish it from other drives, the following "first drive" refers to the drive identified here that matches the type of controlled repeater. In the embodiment of the present application, the driver may be a remote device of the controller or a local module running on the controller system. Wherein, when the driver adopts the remote device, the controller may establish a connection with the determined first driver controller by means of signaling negotiation, including but not limited to the following steps: the controller sends the connection control signaling to the first driver. When the response message returned by the first drive is received, the connection is completed. When the driver adopts the local module of the controller system, the controller can load the first driver into the internal module of the controller by means of module loading, and realize the connection between the controller and the first driver. It should be noted that when the forwarding control needs to be performed on a certain forwarder, the controller performs the above steps separately.

S203 and S204; but the execution order of the two steps is not limited, that is, in addition to the step S204 after the step S203 is performed first, the step S204 may be performed before the step S203, and the step S203 may be performed simultaneously. The action described in S204.

S205: The controller sends the first forwarding control signaling to the first driver connected to the controller in the driver by using the first control forwarding protocol.

S206: The first driver converts the received first forwarding control signaling into a second forwarding control signaling that meets a format requirement of the second control forwarding protocol.

S207: The first driver is connected to the controlled repeater corresponding to the foregoing forwarding rule, and sends the second forwarding control signaling to the controlled forwarder by using a corresponding second control forwarding protocol.

For example, according to the foregoing forwarding rule, the controller C1 needs to control the repeater R1 to perform the first forwarding action, and the controller C1 generates the first forwarding control signaling corresponding to the first forwarding action (corresponding to step S203); C1 controls the forwarding protocol type as a matching element, and can determine that the transponder R1 supporting the protocol P2.1 and the driver D1 implementing the signaling format conversion between the protocols P1 and P2.1 are matched, so the controller C1 will drive D1 as the first driver, and the connection with the driver D1 (corresponding to step S204); The controller CI sends the first forwarding control signaling to the first driver (ie, the driver D1) through the protocol PI (corresponding to step S205); after receiving the first forwarding control signaling, the driver D1 converts the first forwarding control signaling into a match. The second forwarding control signaling required by the format of the protocol P2.1 (corresponding to step S206), and establishing a connection with the controlled forwarder (ie, the repeater R1), and sending the second forwarding control signaling by using the protocol P2.1 To the repeater R1 (corresponding to step S207); thus the repeater R1 can perform the first forwarding action required by the controller C1 under the control of the second forwarding control signaling. It can be seen from the foregoing embodiment 2 that when forwarding control is required for different transponders, only the controller needs to select and connect the corresponding driver according to the type identifier, so that format conversion and forwarding of control signaling can be realized; and the same driver can be It is multiplexed by other controllers or other transponders that support the corresponding protocol. Therefore, in practical applications, only the drivers for the signaling format conversion between the two protocols may be separately set for various control forwarding protocols that may be involved in the SDN network system, so that any controller in the SDN network can be implemented. Forward control for either forwarder.

In other embodiments of the present application, as shown in FIG. 2C, the driver D4 supports both the signaling format conversion between the protocols P1 and P2.2 and the signaling format conversion between the protocols P1 and P2.3; With respect to the structure shown in Fig. 2B, the driver D4 can reduce the total number of drivers by one. Based on the above principle, it can be inferred that the driver supporting the signaling format conversion between multiple control forwarding protocols can reduce the number of drivers in the SDN network, thereby simplifying the structure of the SDN network; corresponding forwarding control method Refer to the signal flow diagram shown in Figure 3 and the related text above. In particular, for an SDN network similar to that shown in FIG. 2C, the driver D4 may determine which control forwarding protocol to convert to, and the second to be converted, according to the type identifier of the controlled repeater specified in the first forwarding control signaling. Which transponder is sent to the forwarding control signaling. On the other hand, when the controller needs to control multiple transponders at the same time, the type identifier of the corresponding multiple controlled transponders may be added in the first forwarding control signaling generated by the controller, and each controlled transponder will be supported at the same time. The corresponding drive of the forwarding control protocol is used as the first driver; the first driver determines the type and number of the second control forwarding protocol according to the type identifier of the controlled forwarder in the first forwarding control signaling, and converts the obtained A plurality of second forwarding control signalings supporting different second control forwarding protocols are sent to the corresponding controlled forwarders. As for the SDN network shown in FIG. 2C, the controller C1 transmits to the driver D4 the first forwarding control signaling having the type identifier of the repeaters R2 and R3, and the driver D4 determines, according to the type identifier therein, that the second control forwarding protocol includes The protocols P2.2 and P2.3 further convert the first forwarding control signaling into at least two second forwarding control signalings, one of which conforms to the format requirement of the protocol P2.2, and is used to control the forwarding device R2, and the other In accordance with the agreement P2.3 The type requirement is used to control the repeater R3. FIG. 4 is a signal flow diagram of another forwarding control method applied to an SDN network according to Embodiment 3 of the present application, to implement control of multiple repeaters by one controller. As shown in FIG. 2A, the SDN network in the third embodiment adds one driver D5 to the contact of FIG. 2A, as shown in FIG. 2D. Correspondingly, the forwarding control method provided in Embodiment 3 of the present application is provided. Specifically, the following steps are included:

S301: The driver configures itself as a virtual forwarder corresponding to the forwarder according to the parameter information of the forwarder of the service thereof. Referring to FIG. 2D, the driver D5 is configured to implement the controller C1 and the forwarders R1, R2, and R3. The signaling format conversion between at least one of the persons, that is, the transponder served by the driver D5 includes at least three of the repeaters R1, R2 and R3. Therefore, the driver configures itself as a virtual repeater R0 corresponding to R1, R2, and R3 according to the parameter information of the repeaters R1, R2, and R3 (correspondingly, the repeaters R1, R2, and R3 are referred to as physical repeaters) . Optionally, the foregoing parameter information can be used to describe attributes such as capabilities, performance, and configuration of the repeater, including but not limited to the following information: control address information (such as IP address), physical port address, bandwidth, and surrounding network of the repeater. Topology connection information (such as the IP/MAC address of the peer).

S302: The virtual forwarder obtained by the above configuration is connected to the controller. Corresponding to the embodiment shown in FIG. 1 , in this embodiment, the virtual forwarder is equivalent to the first driver in the corresponding embodiment of FIG. 1 for implementing control. The signaling format conversion between the device and the above-mentioned controlled repeater.

Since the above driver is configured as a virtual forwarder, it can establish a connection with the controller according to the startup process of the repeater, and the process includes but is not limited to the following steps: The virtual forwarder sends connection control signaling to the controller, when When the response message returned by the controller is received, the connection is completed.

In this embodiment, by the virtualization configuration in step S301, the driver pair controller acts as a repeater, that is, the physical forwarder is invisible to the controller, that is, the topology pattern of the forwarding layer of the controller is shielded, The difference between different physical transponders, etc., so that when the transponder sends the dynamic addition, deletion or capability modification, the configuration of the transponder served by the dynamic adjustment can be dynamically adjusted only by modifying the configuration of the virtual transponder at the drive.

S303: The controller generates first forwarding control signaling according to the forwarding rule.

S304: The controller sends the first forwarding control signaling to the first driver (that is, the virtual forwarder) through the first control forwarding protocol. S305: The first driver converts the received first forwarding control signaling into a second forwarding control signaling that meets a format requirement of the second control forwarding protocol.

S306: The first driver is connected to the controlled repeater corresponding to the foregoing forwarding rule, and sends the second forwarding control signaling to the controlled forwarder by using a corresponding second control forwarding protocol.

For example, on the premise that the virtual forwarder R0 is connected to the controller C1, according to the foregoing forwarding rule, the forwarder R1 needs to be controlled to perform the first forwarding operation, and the controller C1 generates a first forwarding control signal corresponding to the first forwarding action. Order (corresponding to step S303), and send it to the virtual forwarder R0 through the protocol P1 (corresponding to step S304); after receiving the first forwarding control signaling, the virtual forwarder R0 is configured according to the first forwarding control signaling The type identifier of the controlled repeater R1 specified in the first forwarding control signaling is converted into a corresponding second forwarding control signaling conforming to the format requirement of the protocol P2.1 (corresponding to step S305), and the repeater R1 Connect, send the converted second forwarding control signaling to the repeater R1 through the protocol P2.1 (corresponding to step S306); thus, the repeater R1 can execute the controller C1 request under the control of the second forwarding control signaling The first forwarding action.

As can be seen from the third embodiment, the present application configures the driver as a virtual repeater corresponding to the transponder served by the driver, and on the one hand, the driver has a very high multiplexing rate, and the amount of modification to the SDN network and related devices is small; On the one hand, when implementing or deploying a controller, there is no need to consider the topology style and hardware difference of the lower layer repeater. When implementing or deploying the repeater, there is no need to consider the difference of the upper layer controller, so that the controller, the repeater and even the controller The deployment of the entire SDN network is more flexible and easy to implement. Similarly, in this embodiment, the controller does not need to support the built-in plug-in mechanism, and can be applied to any transponder, and the application range is greatly increased.

Optionally, in the embodiment of the present application, when the driver performs the format conversion of the forwarding control signaling, the first forwarding control signaling is performed according to a preset mapping relationship between the corresponding first control forwarding protocol and the second control forwarding protocol. The forwarding control flow rule included in the packet is re-encapsulated to obtain a corresponding second forwarding control signaling. Further, the free conversion of the control signaling format can be realized by setting a direct or indirect mapping relationship between multiple control forwarding protocols in the drive.

In addition, in the embodiment of the present application, the virtual forwarder R0 converts the first forwarding control signaling into the second forwarding control signaling that meets the requirements of different protocol formats, according to the multiple types of identifiers specified in the first forwarding control signaling. In addition, the first forwarding control signaling is automatically decomposed and mapped, so that the forwarding of multiple packets specified by the first forwarding control signaling is distributed to multiple forwarders to implement load balancing of the forwarder and improve forwarding efficiency. For example, the controller C1 sends the following control signaling (ie, a Flow-mod message) to the virtual forwarder through the OpenFlow protocol, indicating that all the packets with the source IP address of 192.168.1.0-192.168.1.255 are VLAN (Virtual Local Area Network, virtual). LAN) encapsulated and forwarded from virtual forwarder R0 port 1: Match(src IP = 192.168.1.0, mask = 255.255.255.0), actions(Push-tag[VLAN ID=l], output[l]) _;

The virtual forwarder R0 maps the received Flow-mod message to the repeaters R1 and R2. The converted control signaling and functions are:

Control signaling for repeater R1:

Match (src IP = 192.168.1.0, mask = 255.255.255.127), actions(Push-tag[VLAN ID=l], output[3]), used to report all source IPs to 192.168.1.0-192.168.1.127 The VLAN is encapsulated and forwarded from the forwarder R1 port 3;

Control signaling for repeater R2:

Match (src IP = 192.168.1.128, mask = 255.255.255.127), actions(Push-tag[VLAN

ID=l], output[2]), used to encapsulate all packets with source IP address 192.168.1.128-192.168.1.255 and forward them out from forwarder R2 port 2.

Referring to FIG. 5, another SDN network-based forwarding control method provided in Embodiment 4 of the present application can implement parameter conversion and modification of a transponder in addition to a function of converting a static protocol message format through a driver. The query, and the function of determining the validity of the control signaling sent by the controller according to the parameter information of the repeater, the specific control flow is as follows:

S401: The driver receives and stores parameter information of a transponder of the service thereof;

In the actual application, the parameter information of the forwarder includes the forwarding queue bandwidth of the port of the forwarder, the priority, the differentiated service code (DSCP), the IP packet fragmentation, the reassembly, the GRE/VxLAN tunnel support, BFD/LLDP (Bidirectional Forwarding Detection/Link Layer Discovery Protocol) support hardware capabilities; mapping between logical ports and physical ports; sources include user-entered parameter information, Parameter information automatically entered by the application, etc.

S402: The driver generates parameter configuration signaling according to the parameter information stored by the driver.

S403: The driver sends the parameter configuration signaling to the corresponding forwarder to implement configuration or modification of parameters of the corresponding forwarder.

In this embodiment, the parameter configuration or modification of the repeater may be separately configured/modified for each repeater, or may be the same configuration/modification for all repeaters or repeaters of the same model.

S404: When the controller needs to obtain information about the capability, performance, and the like of the repeater, the controller generates corresponding forwarding parameter query signaling, and sends the same to the driver.

S405: The driver queries the forwarding parameter of the forwarder according to the received forwarding parameter query signaling. Information, edit the query result to the corresponding forwarding parameter response information, and feed back to the controller;

S406: When the controller needs to perform forwarding control on the forwarder, generate corresponding first forwarding control signaling, and send the same to the driver connected thereto;

S407: The driver determines, according to the parameter information of the transponder stored by the driver, whether the forwarding rule corresponding to the received first forwarding control signal conforms to the function of the corresponding transponder, if yes, step S408 is performed, otherwise step S409 is performed;

S408: The driver converts the received first forwarding control signaling into a second forwarding control signaling that meets the format requirement of the second control forwarding protocol, and sends the second forwarding control signaling to the corresponding forwarder.

S409: The drive returns a control failure message to the controller.

For example, the first forwarding control signaling sent by the controller requires the repeater to perform VxLAN (Virtual Extensible

LAN, virtual extended local area network (LAN) tunnel encapsulation action, and the drive judges that the transponder does not enable VxLAN tunnel support according to the parameter information of the corresponding transponder stored therein (ie, the transponder does not support VxLAN tunnel processing, and cannot perform controller requirements) Forwarding action) At this point, the driver no longer forwards control signaling to the forwarder, but returns a control failure message to the controller to inform the controller that the corresponding forwarder is unable to perform its required forwarding action.

It can be seen from the above fourth embodiment that after storing the parameter information of the repeater on the driver (step S401), the method can dynamically configure or modify the parameters of the forwarder by performing steps S402 to S403, and implement controller forwarding by performing steps S404 and S405. The parameter query of the device implements the execution control judgment of the forwarding control signaling by performing steps S406 to S409, so that the controller can timely grasp whether the generated first control signaling is successfully executed, so as to reasonably arrange related subsequent control actions. In addition, in the embodiment of the present application, when multiple controllers supporting different control forwarding protocols are respectively connected to the same transponder through one driver, different drivers connected to the transponder can send and control each other through a preset interface protocol. Signaling, sharing information between different drives (such as loader information, statistics, etc.).

Taking the SDN network structure shown in FIG. 6A as an example (in FIG. 6A, the controller C1 is connected to the repeater R1 through the driver D1, the controller C2 is connected to the repeater R1 through the driver D2, and the controllers C1, C2 and the repeater R1 are The supported control forwarding protocols are labeled as P1.1, P1.2, and P2.1, respectively, and if a certain transponder parameter is not stored by itself (for convenience of description, assuming that the repeater parameter is X), when the driver D1 When the current value of the X needs to be obtained, the corresponding shared information query signaling may be generated, and the prime shared information query signaling is sent to another driver connected to the repeater R1 (ie, the driver D2); the driver D2 receives the shared information query. After signaling, if X is stored by itself, an information query response message containing the current value of X is generated, and The information inquiry response message is returned to the drive D1, thereby realizing the sharing of the repeater parameter X between the drivers D1 and D2.

Still taking the SDN network structure shown in FIG. 6A as an example, the fifth embodiment of the present application further provides a forwarding control method to illustrate that when multiple drivers are connected to the same transponder, it is necessary to modify the transponder parameters between different drivers. Interworking process. Referring to FIG. 6B, the forwarding control method provided in the fifth embodiment includes the following steps:

S501: When the driver D1 has a parameter modification requirement for the repeater R1, the driver D1 generates a corresponding parameter modification negotiation signaling according to the parameter modification requirement;

S502: the driver D1 and the other drivers connected to the repeater R1 (ie, the driver D2) establish a connection through the mutual negotiation interface, and send the parameter modification negotiation signaling to the other driver (ie, the drive D2);

S503: The driver D2 that receives the parameter modification negotiation signaling, determines whether the parameter modification corresponding to the parameter negotiation signal is allowed, and if so, performs step S504;

S504: The driver that allows the parameter modification generates a negotiation response message for characterizing the parameter modification, and feeds back to the driver D1;

For example, after receiving the parameter modification negotiation signaling, the driver D2 determines the permission parameter modification according to the configuration information of the user, and returns a negotiation response message to the driver D1 to notify the driver D1 of the determination result.

S505: After receiving the negotiation response message fed back by all other drivers connected to the repeater R1, the driver D1 generates corresponding parameter configuration signaling according to the parameter modification requirement, and sends the parameter configuration signaling to the repeater R1 to The control repeater R1 performs a corresponding parameter modification action.

In the embodiment of the present application, for the driver D1, there is only one other driver, that is, the driver D2. Therefore, when D1 receives the negotiation response message returned by D2, it can send parameter configuration signaling to the repeater R1. In addition, if the above SDN network has D1 and D2, there is another driver D3 connected to the repeater R1, that is, for the driver D1, there are two other drivers, namely, the drivers D2 and D3; in this case, the D1 direction After D2 and D3 send the parameter modification negotiation signaling, D1 sends the parameter configuration signaling to the repeater R1 only if both the negotiation response message returned by D2 and the negotiation response message returned by D3 are received. Only the negotiation response message returned by D2 is received, or only the negotiation response message returned by D3 is received, and the parameter configuration signaling is not sent to the repeater R1.

It can be seen from the foregoing technical solutions that, in the embodiment of the present application, if all the drivers connected to the repeater R1 allow parameter modification, the driver D1 having the parameter modification requirement sends the parameter configuration signaling to the repeater R1. Control the repeater R1 to perform corresponding parameter modification actions, which can avoid parameter changes to certain The effect of the modified drive is not allowed. Optionally, in order to synchronize the parameter information to be modified to other devices in the SDN network, the embodiment further includes the following steps after step S504:

S506: The driver that allows the parameter modification to modify the parameter information stored by itself according to the parameter modification manner specified in the parameter modification negotiation signaling;

Optionally, the embodiment further includes the following steps:

S507: After the driver modifies the parameter information stored by the driver, sends a parameter modification notification to the controller connected thereto.

For example, the driver D2 that allows the corresponding parameter modification sends a parameter modification notification to the controller C2 after performing step S506 to inform the controller C2 that the corresponding parameter information has been modified.

It can be seen that by transmitting the above parameter modification notification, the modified parameter information is synchronized to each controller, and the consistency of the same parameter on all devices in the entire SDN network can be ensured. In particular, if the driver receiving the above parameter modification negotiation signaling does not allow the parameter modification requested by the driver D1, the drive may not return any message to the drive D1, or the drive performs the following steps:

S508: The drive whose parameter modification is not allowed to return a modification failure message to the drive D1.

For example, after receiving the parameter modification negotiation signaling sent by the driver D1, the driver D2 determines that the parameter modification requested in the negotiation signaling is not allowed according to the relevant configuration information of the driver D2, and the driver D2 does not return any to the driver D1. Respond to the message, or return a modification failure message. For the driver D1, if no message is received from the driver D2, or a modification failure message from the driver D2 is received, the driver D1 can determine that the driver D2 does not allow parameter modification. Further, corresponding to the above step S505, when the driver having the parameter modification requirement does not receive the negotiation response message fed back by all other drivers connected to the repeater R1 (ie, at least one other drive does not return a message, or the modification fails to be returned) When the message), perform the following steps:

The drive with the parameter modification requirement sends modification revocation information to other drives to prohibit or revoke the other drive to modify the parameter information stored by itself.

Taking the three drivers D1, D2 and D3 connected to the repeater R1 as an example, for the parameter modification negotiation signaling sent by the driver D1, the driver D2 allows modification, and returns a negotiation response message to D1, D3 does not allow modification, and D1 is not allowed. Returning the modification failure message; then the driver D1 sends a modification to at least D2 that returns the negotiation response information. If the driver D2 has performed the step S506, the driver D2 restores the modified parameter information to the original parameter information. Similarly, if the driver D2 has performed step S507, the information is received. After modifying the revocation information, the driver D2 sends the notification information to the controller C2 again to notify the controller C2 that the modified parameter information is restored to the original parameter information.

In addition, in other embodiments of the present application, in order to reduce the number of data read and write operations of the drive to the relevant storage device, and reduce the workload of the drive, if and only if the drive having the parameter modification requirement performs step S505, it passes each of the other drives. The modification trigger message is sent to trigger it to perform steps S506 and S507, so that the driver burden caused by the parameter information being modified and then revoked can be avoided.

It can be seen from the foregoing embodiment 5 that, in the embodiment of the present application, the signaling format conversion between the controller and the repeater supporting different control forwarding protocols is implemented by using the driver, so that the controller does not need to support the built-in plug-in mechanism, and the application scope is large. On the other hand, it can realize the functions of configuring, modifying, querying, and sharing the parameters of the repeater between the drivers, which can simplify the capability of the SDN network to the repeater, and is easy to implement by the repeater, which is beneficial to the forwarding performance of the repeater. Optimization. On the other hand, corresponding to the above method embodiment, the sixth embodiment of the present application further provides a software defined network.

SDN, as shown in the SDN network diagram shown in FIG. 7, the software definition network SDN includes: a controller 710, a repeater 720, and at least one driver 730. The controller 710 is configured to: generate first forwarding control signaling according to the forwarding rule, and send the first forwarding control signaling to the first driver connected to the controller in the driver 730 by using the first control forwarding protocol. The driver 730 is configured to: after being connected to the controller 710 as the first driver, convert the received first forwarding control signaling into a second forwarding control signaling that meets a format requirement of the second control forwarding protocol, and The second forwarding control signaling is sent to the corresponding repeater 720 through the second control forwarding protocol. The first control forwarding protocol is a control forwarding protocol supported by the controller; the second control forwarding protocol is a control forwarding protocol supported by the repeater. It can be seen from the foregoing embodiment that the first forwarding control signaling generated by the controller is format-converted by the driver and forwarded to the corresponding forwarding by using the driver to implement different forwarding devices that support different protocols by the same controller. The controller does not need to support the built-in plug-in mechanism. Therefore, the embodiment of the present application can be applied to control signaling conversion between any type of controller and a repeater, and the application range is greatly increased. In addition, in the embodiment of the present application, by changing the connection relationship between different types of drivers, controllers, and repeaters, multiplexing of the driver, the repeater, and the controller can be realized, and it is not required for each controller. Every transponder Set up a drive, the amount of changes to the SDN network and related equipment is small, and the cost is low. In an optional implementation manner of the present application, the controller 710 is further configured to: determine, as the first driver, at least one driver that matches a type of a repeater corresponding to the forwarding rule, and the first driver establish connection. In another optional implementation manner of the present application, the driver 730 is further configured to: configure itself as a virtual forwarder corresponding to the forwarder according to parameter information of the forwarder of the service, and forward the virtual The device establishes a connection with the controller as the first driver.

In another optional implementation manner of the present application, the driver 730 is further configured to: configure itself as a virtual forwarder corresponding to the forwarder according to parameter information of the forwarder that it serves, and forward the virtual The device establishes a connection with the controller as the first driver.

In another optional implementation manner of the present application, in a case where the driver 730 is connected to the controller 710 as the first driver, and the driver 730 is simultaneously connected to the plurality of transponders 720, the driver 730 is specifically configured to: a preset mapping relationship between the first control forwarding protocol and the second control forwarding protocol, converting the first forwarding control signaling into multiple second forwarding control signaling corresponding to different repeaters, and sending the respective To the corresponding transponder. In another optional implementation manner of the present application, in a case where the driver 730 is connected to the controller 710 as the first driver, the driver 730 is further configured to: determine, according to the parameter information of the transponder stored by itself, the received Whether the forwarding rule corresponding to the first forwarding control signaling conforms to the function of the corresponding forwarder; if the forwarding rule corresponding to the first forwarding control signaling does not conform to the function of the corresponding forwarder, returning a control failure message to the controller, otherwise executing And converting the received first forwarding control signaling into a second forwarding control signaling that meets a format requirement of the second control forwarding protocol.

In another optional implementation manner of the present application, the driver 730 is further configured to: generate parameter configuration signaling according to parameter information of the transponder stored by itself, and send the parameter configuration signaling to a corresponding transponder to configure And / or modify the parameters of the corresponding transponder.

In another optional implementation manner of the present application, the driver 730 is further configured to: when the transponder serving the parameter has a parameter modification requirement, send parameter modification negotiation signaling to another driver connected to the repeater, and After receiving the negotiation response message returned by the other driver, the corresponding parameter is modified by sending the parameter configuration signaling to the corresponding forwarder.

In another optional implementation manner of the present application, the driver 730 is further configured to: when receiving the forwarding parameter query signaling sent by the controller 710, generate corresponding forwarding parameters according to the parameter information of the transponder stored by the controller 710. Answering the information, and feeding back the forwarding parameter response information to the controller 710.

In the SDN network embodiment provided by the present application, the driver may be either a remote device of the controller or a local module running on the controller system. Wherein, when the driver adopts the remote device, the controller may establish a connection with the determined first driver controller by means of signaling negotiation, including but not limited to the following steps: the controller sends the connection control signaling to the first driver When the response message returned by the first drive is received, the connection is completed. When the driver adopts the local module of the controller system, the controller can load the first driver into the internal module of the controller by means of module loading, and realize the connection between the controller and the first driver. On the other hand, referring to FIG. 8, the seventh embodiment of the present application provides another forwarding control method based on an SDN network. The SDN network includes at least: a forwarder that implements packet forwarding, and performs forwarding control on the forwarder. a controller, and at least one driver that implements drive control of the repeater; correspondingly, the forwarding control method comprises the following steps:

S801: The first driver connected to the controller in the driver receives the first forwarding control signaling sent by the controller by using the first control forwarding protocol.

S802: The first driver converts the received first forwarding control signaling into a second forwarding control signaling that meets a format requirement of the second control forwarding protocol.

S803: The first driver sends the second forwarding control signaling to a corresponding forwarder by using a second control forwarding protocol.

The first control forwarding protocol is a control forwarding protocol supported by the controller; and the second control forwarding protocol is a control forwarding protocol supported by the repeater.

It can be seen from the above-mentioned embodiment that the present invention implements the signaling format conversion between the controller and the repeater through the driver. In the case that the controller does not have any protocol conversion plug-in built in, the controller and the repeater can be realized. For a multi-control, therefore, the scope of application of the embodiments of the present application is greatly increased relative to the prior art. In addition, with the embodiment, by changing the connection relationship between different types of drivers, controllers, and repeaters, multiplexing of the driver, the repeater, and the controller can be realized, and it is not required for each controller, each A transponder sets up a drive, which has a small amount of changes to the SDN network and related equipment, and low cost. Referring to FIG. 9, the eighth embodiment of the present application provides another forwarding control method, which is based on an SDN network with a controller, a repeater and a driver. The method includes at least the following steps:

S901: The driver configures itself as a virtual forwarder corresponding to the forwarder of the service according to the parameter information of the forwarder of the service, and establishes a connection between the virtual forwarder and the controller as the first driver; S902: The first driver connected to the controller in the driver receives the first forwarding control signaling sent by the controller by using the first control forwarding protocol.

S903: The first driver converts the received first forwarding control signaling into a second forwarding control signaling that meets a format requirement of the second control forwarding protocol.

S904: The first driver sends the second forwarding control signaling to a corresponding forwarder by using a second control forwarding protocol.

In the foregoing embodiment 8, by configuring the driver as a virtual transponder, the signaling format conversion between the plurality of controllers and the plurality of transponders can be realized by using the one driver, and the modification amount of the SDN network and related devices is implemented. Small, low cost. In addition, after being configured as a virtual repeater, the driver acts as a repeater to the controller, which can shield the controller from differences in topology style and hardware of the lower layer repeater, and simplify the control flow of the controller; Shielding the difference between the upper-layer controllers of the transponders, so that when implementing or deploying the transponders, it is not necessary to consider the specific types and performance attributes of the upper-layer controllers, and reduce the basic performance requirements of the SDN network for the lower-layer repeaters, which facilitates the performance of the repeater. Optimization and expansion.

Referring to FIG. 10, another forwarding control method provided in Embodiment 9 of the present application is also based on an SDN network having a controller, a repeater, and a driver. The method includes at least the following steps:

S1001: The first driver connected to the controller in the driver receives the first forwarding control signaling sent by the controller by using the first control forwarding protocol;

S1002: The first driver determines whether the forwarding rule corresponding to the received first forwarding control signaling conforms to the function of the corresponding forwarder according to the parameter information of the forwarder that is stored by itself, and if yes, performs step S1004, otherwise executes Step S1003;

S1003: the first driver returns a control failure message to the controller;

In this embodiment, before performing format conversion, the first driver first determines the enforceability of the first forwarding control signaling, and returns a control failure message to the controller when the determination result is unexecutable, so that the controller is reasonable. Arrange relevant follow-up control actions.

S1004: The first driver converts the received first forwarding control signaling into a second forwarding control signaling that meets a format requirement of the second control forwarding protocol.

Optionally, in the embodiment of the present application, the first driver converts the first forwarding control signaling into a corresponding second forwarding control signaling according to a preset mapping relationship between the first control forwarding protocol and the second control forwarding protocol. . In practical applications, direct or indirect mapping between multiple control forwarding protocols can be set in one drive, thereby enabling free conversion between multiple control signaling through the driver.

S1005: The first driver sends the second forwarding control signaling to the second control forwarding protocol to The corresponding transponder.

Further, for a driver or a virtual forwarder to serve multiple forwarders at the same time, or the first forwarding control signaling sent by the controller needs to control the actual application of multiple forwarders, etc., in the embodiment of the present application, the first driver is based on And the first forwarding control signaling is converted into the second forwarding control signaling that meets the format requirements of the second control forwarding protocol of different types, and is respectively sent to the corresponding forwarder.

Optionally, on the basis of any one of the foregoing Embodiments 7-14, the following steps may be used to dynamically configure or modify the parameters of the forwarder:

The driver generates parameter configuration signaling according to the parameter information of the transponder stored by itself, and sends the parameter configuration signaling to the corresponding transponder to configure and/or modify the parameters of the corresponding transponder.

In particular, in the case where multiple drivers serve the same transponder, when a driver has a parameter modification requirement for the transponder served by the driver, the driver sends parameter modification negotiation signaling to other drivers connected to the same transponder. And after receiving the negotiation response message returned by all other drivers, modifying the corresponding parameter by sending the parameter configuration signaling to the corresponding forwarder; conversely, if the above driver having the parameter modification requirement does not receive any other driver The returned negotiation response message, or only the negotiation response message returned by some other transponders, indicates that at least one other driver does not allow parameter modification. In this case, to ensure the consistency of related parameter information in the SDN network, the parameter modification requirement is required. The driver does not send parameter configuration signaling to the repeater.

Optionally, on the basis of any one of the foregoing seven to nine embodiments, the controller may further perform parameter query on the forwarder by using the following steps:

The driver receives the forwarding parameter query signaling sent by the controller, and generates corresponding forwarding parameter response information according to the parameter information of the transponder stored by the controller, and feeds back the forwarding parameter response information to the controller.

The above parameter query process does not need to access the corresponding transponder, and the controller only needs to communicate with the driver to obtain the parameter information of each transponder. On the other hand, referring to FIG. 11, Embodiment 10 of the present application further provides a driver applied to a software-defined network SD, where the SDN network includes a forwarder that implements packet forwarding, and the repeater according to a forwarding rule. a controller that performs forwarding control; the driver includes at least:

The signaling receiving unit 101 is configured to: when the driver is connected to the controller as the first driver, receive the first forwarding control signaling sent by the controller by using the first control forwarding protocol; and the signaling conversion unit 102 is configured to send the signal And causing, by the receiving unit 101, the first forwarding control signaling to be converted into a second forwarding control signaling that meets a format requirement of the second control forwarding protocol; The signaling sending unit 103 is configured to send the second forwarding control signaling to the corresponding forwarder by using a second control forwarding protocol, where the first control forwarding protocol is a control forwarding protocol supported by the controller; The second control forwarding protocol is a control forwarding protocol supported by the repeater. In an optional implementation manner of the present application, the signaling conversion unit 102 is specifically configured to: convert the first forwarding control signaling according to a preset mapping relationship between the first control forwarding protocol and the second control forwarding protocol Correspondingly, the signaling sending unit 1032 is specifically configured to: pass the multiple second forwarding control signaling generated by the signaling converting unit to the corresponding first The second control forwarding protocol is sent to the corresponding forwarder. Referring to FIG. 12, a driver applied to a software-defined network SD according to Embodiment 11 of the present application includes the signaling receiving unit 101, the signaling conversion unit 102, and the signaling sending unit 103 as described in Embodiment 10 above. , also includes at least one of the following units:

The self-configuring unit 104 is configured to configure itself as a virtual forwarder corresponding to the transponder served by the transponder according to the parameter information of the transponder served by the driver, and use the virtual transponder as the first driver and the The controller establishes a connection.

The signaling determining unit 105 is configured to determine, according to the parameter information of the forwarder that is stored by itself, whether the forwarding rule corresponding to the received first forwarding control signaling conforms to the function of the corresponding forwarder; if the first forwarding control signaling corresponds to If the forwarding rule does not comply with the function of the corresponding forwarder, the control failure message is returned to the controller; otherwise, the signaling conversion unit and/or the signaling sending unit are triggered.

The parameter configuration unit 106 is configured to generate parameter configuration signaling according to parameter information of the transponder stored by itself, and send the parameter configuration signaling to a corresponding transponder to configure and/or modify parameters of the corresponding transponder.

The signaling negotiation unit 107 is configured to: when the driver has a parameter modification requirement for the transponder served by the driver, send parameter modification negotiation signaling to other drivers connected to the repeater, and receive negotiation of returning by other drivers. After the message is acknowledged, the parameter configuration unit is triggered to modify the parameters of the corresponding forwarder.

The parameter querying unit 108 is configured to receive the forwarding parameter query signaling sent by the controller, generate forwarding parameter response information corresponding to the forwarding parameter query signaling according to the parameter information of the forwarder stored by the controller, and send the forwarding parameter response Information is fed back to the controller.

For the convenience of description, the above drivers are described as being divided into various units by function. Of course, the functions of the various units may be implemented in one or more software and/or hardware in the practice of the invention. Referring to FIG. 13 , the embodiment 12 of the present application further provides a driver applied to the software-defined network SD, which includes: a processor 201 and a memory 202; wherein the memory 202 stores an operation instruction that the processor 201 can execute, The processor 201 reads the operation instructions in the memory 202 to implement the following functions: connecting with the controller and receiving the first forwarding control signaling sent by the controller through the first control forwarding protocol; the first forwarding control signaling to be received Converting to the second forwarding control signaling conforming to the format requirement of the second control forwarding protocol; sending the second forwarding control signaling to the corresponding forwarder by using the second control forwarding protocol.

In an optional implementation manner, the processor 201 is further configured to configure itself as a virtual forwarder corresponding to the transponder served by the transponder according to the parameter information of the served transponder to implement establishment with the controller. connection.

In another optional implementation, the memory 202 is further configured to store parameter information of the transponder served by the driver. Correspondingly, the processor 201 is further configured to: determine, according to the parameter information of the transponder stored by the memory 202, Whether the forwarding rule corresponding to the first forwarding control signaling is consistent with the function of the corresponding forwarding device; if yes, performing the above function of converting the first forwarding control signaling into the second forwarding control signaling, otherwise returning to the controller Control failure message.

In another optional implementation manner, the processor 201 is further configured to: generate parameter configuration signaling according to the parameter information of the forwarder stored in the memory 202, and send the parameter configuration signaling to a corresponding forwarder to configure And / or modify the parameters of the corresponding transponder.

In another optional implementation manner, the processor 201 is further configured to: when the transponder for the serving device has a parameter modification requirement, send the parameter modification negotiation signaling to the other driver connected to the repeater, and receive After the negotiation response message returned by the other driver, the corresponding parameter configuration signaling is generated and sent to modify the parameters of the corresponding transponder.

In another optional implementation manner, the processor 201 is further configured to: receive the forwarding parameter query signaling sent by the controller, and generate, according to the parameter information of the forwarder stored by the controller, a forwarding parameter corresponding to the forwarding parameter query signaling. Answering the information, and feeding back the forwarding parameter response information to the controller. The various embodiments in the specification are described in a progressive manner, and the same or similar parts between the various embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for a device or system embodiment, since it is substantially similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method embodiment. The apparatus and system embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, ie Can be located in one place, or it can be divided Spread onto multiple network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the embodiment. Those of ordinary skill in the art can understand and implement without any creative effort.

The application can be described in the general context of computer-executable instructions executed by a computer, such as a program module. Generally, program modules include routines, programs, objects, components, data structures, and the like that perform particular tasks or implement particular abstract data types. The present application can also be practiced in distributed computing environments where tasks are performed by remote processing devices that are connected through a communication network. In a distributed computing environment, program modules can be located in both local and remote computer storage media including storage devices.

It should be noted that, in this context, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply these There is any such actual relationship or order between entities or operations. Furthermore, the terms "comprising", "comprising" or "comprising" or "comprising" or "comprising" or "the" Other elements, or elements that are inherent to such a process, method, item, or device. In the absence of further restrictions, the terms "comprising a ..." are not intended to exclude the presence of the same elements in the process, method, article, or device.

The above description is only a specific embodiment of the present application, and it should be noted that those skilled in the art can also make some improvements and retouching without departing from the principle of the application, and these improvements and retouchings are also It should be considered as the scope of protection of this application.

Claims

Rights request

A forwarding control method based on a software-defined network SDN, where the SDN network includes a forwarder that implements packet forwarding, and a controller that performs forwarding control on the forwarder according to a forwarding rule; The network further includes at least one driver that implements drive control on the repeater; the forwarding control method includes: the controller generates first forwarding control signaling according to the forwarding rule, and forwards the first forwarding control signaling by using the first control The protocol is sent to the first driver connected to the controller in the driver; the first driver converts the received first forwarding control signaling into a second forwarding control signaling that meets a format requirement of the second control forwarding protocol, And sending the second forwarding control signaling to the corresponding forwarder by using the second control forwarding protocol; wherein, the first control forwarding protocol is a control forwarding protocol supported by the controller; and the second control forwarding protocol is The control forwarding protocol supported by the repeater.

The forwarding control method according to claim 1, wherein before the controller sends the first forwarding control instruction, the forwarding control method further includes: the controller determining a repeater corresponding to the forwarding rule The at least one driver of the matching type acts as the first driver and establishes a connection with the first driver.

The forwarding control method according to claim 2, wherein the controller determines at least one driver that matches the type of the repeater corresponding to the forwarding rule as the first driver, and includes: a controller Determining, according to the registration message sent by each driver and the type identifier of the transponder, the type of the transponder corresponding to the forwarding rule, and determining the driver as the first driver; The registration message includes a type identifier of one or more types of repeaters supported by the corresponding driver; the type identifier includes at least one of the following: a repeater model, a control forwarding protocol type, a flow table type template TTP, and a negotiable data path. Model DM.

The forwarding control method according to claim 2, wherein the establishing a connection between the controller and the first driver comprises: establishing, by the controller, a connection with the first driver by means of module loading or signaling negotiation.

The forwarding control method according to claim 1, wherein before the controller sends the first forwarding control instruction, the forwarding control method further includes: the parameter information of the forwarder of the driver according to the service Configuring itself as a virtual forwarder corresponding to the transponder it serves; the virtual repeater acts as a first driver to establish a connection with the controller.

The forwarding control method according to any one of claims 1 to 5, wherein the first driver converts the received first forwarding control signaling into a format that meets a format requirement of the second control forwarding protocol. The second forwarding control signaling includes: when the repeater includes multiple, the first driver performs the first forwarding control according to a preset mapping relationship between the first control forwarding protocol and the second control forwarding protocol. The signaling is converted into a plurality of second forwarding control signalings corresponding to different transponders.

The forwarding control method according to any one of claims 1 to 5, further comprising: determining, by the first driver, the received first forwarding control signaling according to the parameter information of the forwarder stored by the first driver Whether the corresponding forwarding rule conforms to the function of the corresponding forwarder; if the forwarding rule corresponding to the first forwarding control signaling does not conform to the function of the corresponding forwarder, the first driver returns a control failure message to the controller, otherwise executing the The received first forwarding control signaling is converted into a second forwarding control signaling that meets the format requirements of the second control forwarding protocol.

The forwarding control method according to any one of claims 1 to 5, further comprising: the driver generating parameter configuration signaling according to parameter information of the transponder stored by the driver, and configuring the parameter configuration The order is sent to the corresponding repeater to configure and/or modify the parameters of the corresponding repeater.

The forwarding control method according to any one of claims 1 to 5, further comprising: transmitting and/or receiving control signaling between different drivers connected to the same transponder through a preset interface protocol; Transmitting and/or receiving control signaling between different drivers connected to the same transponder through a preset interface protocol, including at least one of the following: when the second driver connected to the transponder has a transponder parameter modification requirement And the second driver sends parameter modification negotiation signaling to the third driver connected to the repeater; the third driver receives the parameter modification negotiation signaling, and in the parameter modification negotiation signaling is allowed And returning, by the second driver, a negotiation response message; the second driver sending the shared information query signaling to the third driver; the third driver receiving the shared information query signaling, And returning, according to the shared information query signaling, a corresponding information query response message to the second driver.

The forwarding control method according to any one of claims 1 to 5, further comprising: when receiving the forwarding parameter query signaling sent by the controller, the driver according to the parameter of the transponder stored by the driver The information generates corresponding forwarding parameter response information, and feeds back the forwarding parameter response information to the controller.

A software-defined network SDN, comprising: a controller, a repeater, and at least one driver; the controller is configured to: generate first forwarding control signaling according to a forwarding rule, and pass the first forwarding control signaling Transmitting, by the first control forwarding protocol, a first driver connected to the controller in the driver; the driver is configured to: after the first driver is connected to the controller, receive the first forwarding control signaling Transmitting the received first forwarding control signaling into a second forwarding control signaling conforming to the format requirement of the second control forwarding protocol, and sending the second forwarding control signaling to the corresponding by using the second control forwarding protocol And the first control forwarding protocol is a control forwarding protocol supported by the controller; and the second control forwarding protocol is a control forwarding protocol supported by the repeater.

The SDN network according to claim 11, wherein the controller is further configured to: determine, as the first driver, at least one driver that matches a type of a repeater corresponding to the forwarding rule, And establishing a connection with the first driver.

The SDN network according to claim 11, wherein the driver is further configured to: configure itself as a virtual forwarder corresponding to a transponder served by the transponder according to the parameter information of the transponder it serves, and The virtual repeater is used as the first driver to establish a connection with the controller.

The SDN network according to any one of claims 11 to 13, wherein, after being connected to the controller as the first driver, the driver is specifically configured to: when connected to a plurality of transponders And converting, according to a preset mapping relationship between the first control forwarding protocol and the second control forwarding protocol, the first forwarding control signaling into multiple second forwarding control signaling corresponding to different repeaters, and Send to the corresponding forwarder separately.

The SDN network according to any one of claims 11 to 13, wherein after being connected to the controller as the first driver, the driver is further configured to:: according to parameters of the transponder stored by itself And determining, according to the information, whether the forwarding rule corresponding to the received first forwarding control signaling conforms to the function of the corresponding forwarder; if the forwarding rule corresponding to the first forwarding control signaling does not meet the function of the corresponding forwarder, returning to the controller Controlling the failure message, otherwise performing the converting the first forwarding control signaling into the second forwarding control signaling conforming to the format requirement of the second control forwarding protocol.

The SDN network according to any one of claims 11 to 13, wherein the driver is further configured to: generate parameter configuration signaling according to parameter information of the transponder stored by itself, and configure the parameter configuration signaling Send to the appropriate repeater to configure and/or modify the parameters of the corresponding repeater.

The SDN network according to claim 16, wherein the driver is further configured to: send control signaling to another driver that is the same as the connected repeater by using a preset interface protocol, and/or receive the And the control signaling sent by the other driver, where the sending the control signaling to the another driver includes at least one of: sending, when the driver has a transponder parameter modification requirement, to the another driver Parameter modification negotiation signaling; sending shared information query signaling to the another driver; receiving the control signaling sent by the another driver, comprising at least one of: receiving the another driver to modify according to the parameter Negotiating the negotiation response information returned by the signaling; receiving an information query response message played by the another driver according to the shared information query signaling.

The SDN network according to any one of claims 11 to 13, wherein the driver is further configured to: when receiving the forwarding parameter query signaling sent by the controller, according to the parameter information of the transponder stored by the controller Generating corresponding forwarding parameter response information, and feeding back the forwarding parameter response information to the controller.

A forwarding control method based on a software-defined network SD, wherein the SDN network includes a forwarder that implements packet forwarding, and a controller that performs forwarding control on the forwarder. The SDN network further includes At least one driver that implements drive control of the repeater; the forwarding control method includes: the first driver connected to the controller in the driver receives first forwarding control signaling sent by the controller through the first control forwarding protocol; Translating, by the first driver, the received first forwarding control signaling into a second forwarding control signaling that meets a format requirement of the second control forwarding protocol;

The first driver sends the second forwarding control signaling to the corresponding forwarder by using the second control forwarding protocol; wherein the first control forwarding protocol is a control forwarding protocol supported by the controller; The control forwarding protocol is a control forwarding protocol supported by the repeater.

The forwarding control method according to claim 19, further comprising: the driver configuring itself as a virtual transponder corresponding to the transponder served by the transponder according to the parameter information of the transponder it serves, and The virtual repeater is used as the first driver to establish a connection with the controller.

The forwarding control method according to claim 19 or 20, wherein the first driver converts the received first forwarding control signaling into a second forwarding control that conforms to a format requirement of the second control forwarding protocol. The signaling includes: when the repeater includes multiple, the first driver converts the first forwarding control signaling to correspond to different according to a preset mapping relationship between the first control forwarding protocol and the second control forwarding protocol Multiple second forwarding control signaling of the repeater.

The forwarding control method according to claim 19 or 20, further comprising: determining, by the first driver, the received first forwarding control signaling according to the parameter information of the forwarder stored by the first driver Whether the forwarding rule conforms to the function of the corresponding forwarder;

If the forwarding rule corresponding to the first forwarding control signaling does not meet the function of the corresponding forwarding device, the first driver returns a control failure message to the controller, otherwise, performing the converting the first forwarding control signaling to be consistent with the first The second forwarding control signaling required by the format of the control forwarding protocol.

The forwarding control method according to claim 19 or 20, further comprising: the driver generating parameter configuration signaling according to the parameter information of the forwarder stored by the driver, and sending the parameter configuration signaling to Corresponding repeaters to configure and/or modify the parameters of the corresponding repeater.

The forwarding control method according to claim 19 or 20, further comprising: the driver transmitting control signaling to another driver of the same connected repeater through a preset interface protocol, and/or Receiving control signaling sent by the another driver; wherein the driver sends control signaling to the another driver, including at least one of the following: Transmitting parameter modification negotiation signaling to the other driver when the driver has a repeater parameter modification requirement; transmitting shared information query signaling to the another driver; the driver receiving the control sent by the another driver The signaling includes at least one of the following: receiving the negotiation response information returned by the another driver according to the parameter modification negotiation signaling; and receiving an information query response message played by the another driver according to the shared information query signaling.

The forwarding control method according to claim 19 or 20, further comprising: when receiving the forwarding parameter query signaling sent by the controller, the driver generates corresponding according to the parameter information of the transponder stored by the driver Forwarding parameter response information and feeding back the forwarding parameter response information to the controller.

26, a driver, is applied to a software-defined network SD, the SDN network includes a forwarder that implements packet forwarding, and a controller that performs forwarding control on the forwarder according to a forwarding rule; and the method includes: signaling a receiving unit, configured to: when the driver is connected to the controller as the first driver, receive the first forwarding control signaling sent by the controller by using the first control forwarding protocol; and the signaling conversion unit is configured to receive the signaling The first forwarding control signaling received by the unit is converted into the second forwarding control signaling that meets the format requirement of the second control forwarding protocol; the signaling sending unit is configured to forward the second forwarding control signaling by using the second control The protocol is sent to the corresponding forwarder; wherein the first control forwarding protocol is a control forwarding protocol supported by the controller; and the second control forwarding protocol is a control forwarding protocol supported by the forwarder.

The drive according to claim 26, further comprising: a self-configuring unit, configured to configure itself as a virtual forwarding corresponding to the transponder served by the transponder according to the parameter information of the transponder served by the driver And establishing a connection with the virtual forwarder as the first driver.

The driver according to claim 26 or 27, wherein, when the driver is connected as a first driver to a plurality of transponders, the signaling conversion unit is specifically configured to: according to the first control forwarding protocol and The second control forwarding protocol is configured to convert the first forwarding control signaling into multiple second forwarding control signalings corresponding to different repeaters; the signaling sending unit is specifically configured to: The plurality of second forwarding control signalings generated by the signaling conversion unit are respectively sent to the corresponding forwarders through corresponding second control forwarding protocols.

The driver according to claim 26 or 27, further comprising: a signaling determining unit, configured to determine, according to parameter information of the transponder stored by itself, the received first forwarding control signaling Whether the forwarding rule conforms to the function of the corresponding forwarder; if the forwarding rule corresponding to the first forwarding control signaling does not conform to the function of the corresponding forwarder, returning a control failure message to the controller; otherwise, triggering the signaling conversion unit and/or Or signaling unit.

The driver according to claim 26 or 27, further comprising: a parameter configuration unit, configured to generate parameter configuration signaling according to parameter information of the transponder stored by itself, and send the parameter configuration signaling Go to the appropriate repeater to configure and/or modify the parameters of the corresponding repeater.

The driver according to claim 26 or 27, further comprising: an information interworking unit, configured to send control signaling to another driver that is the same as the connected repeater by using a preset interface protocol, and/or Receiving control signaling sent by the another driver, where the sending the control signaling to the another driver includes at least one of: when the driver has a transponder parameter modification requirement, to the other a driver sends a parameter modification negotiation signaling; and sends the shared information query signaling to the another driver; the receiving the control signaling sent by the another driver, comprising at least one of the following: receiving the another driver according to the Declaring the negotiation response information returned by the negotiation signaling; Receiving an information query response message played by the another driver according to the shared information query signaling.

The driver according to claim 26 or 27, further comprising: a parameter query unit, configured to generate, according to parameter information of the transponder stored by the controller, when receiving the forwarding parameter query signaling sent by the controller The corresponding parameter response information is forwarded, and the forwarding parameter response information is fed back to the controller.