WO2015074396A1

WO2015074396A1 - Automatic configuration method, device and system of software defined network

Info

Publication number: WO2015074396A1
Application number: PCT/CN2014/078472
Authority: WO
Inventors: 张习通
Original assignee: 华为技术有限公司
Priority date: 2013-11-21
Filing date: 2014-05-27
Publication date: 2015-05-28
Also published as: CN103618621B; CN103618621A

Abstract

An automatic configuration method, a device and a system of a Software Defined Network (SDN) are used for improving controller configuration efficiency of a switch. The method comprises: when any one controller determines that itself becomes a main controller, enabling an IP address that needs to be used when the any one controller becomes the main controller; and when the any one controller receives a controller allocation request sent by any one switch with the IP address used as a target address, determining a controller to be allocated to the switch, and sending the switch a message used for indicating the controller allocated to the switch.

Description

The invention relates to an automatic configuration method, device and system for software-defined network SDN. The application is submitted to the Chinese Patent Office on November 21, 2013, and the application number is 201310594163.2. The invention name is "a software-defined network SDN automatic configuration method and device. The priority of the Chinese Patent Application, the entire disclosure of which is incorporated herein by reference.

Technical field

The present invention relates to the field of computer technologies, and in particular, to an automatic configuration method, device, and system for a software-defined network. Background technique

Software Defined Network (SDN) is a new type of network architecture. Its core technology OpenFlow (OpenFlow) realizes flexible control of network traffic by separating the control plane of the network device from the data plane. And application innovation provides a good platform.

Each OpenFlow switch has a flow table for packet lookup and forwarding. The switch can connect to the i3⁄4 table through the OpenFlow protocol via a secure channel to check and manage the i3⁄4 table, as shown in Figure 1.

When there are too many switches connected to the controller, it will bring a lot of performance pressure to the controller, and the controller will become the bottleneck of the entire system environment. A typical solution is to group a large number of controllers into a distributed cluster, each switch is connected to a different controller in the cluster, which can reduce the performance pressure of a single controller, and the controller itself Will not become the bottleneck of the entire system. There is a leader controller in the controller cluster to manage the cluster's resources and task assignments. The other controllers are follower controllers. In addition, an administrator is required to configure an access controller for each switch. One configuration scheme is to configure two controllers for each switch, one for the master controller and one for the secondary (second). The controller; as shown in Figure 2, is the controller configuration diagram of the switch. The switch and the two controllers remain connected, but only the master controller interacts with the switch. When the master controller fails, the secondary controller takes over the business interaction with the switch.

For the administrator, you need to know the information of each controller in the controller cluster, and decide which controllers are configured for each switch according to the condition of each controller. When there are more controllers in the cluster, the configuration is inefficient. Summary of the invention The embodiments of the present invention provide a method, a device, and a system for automatically configuring a software-defined network, which are used to solve the problem of low configuration efficiency when manually configuring a controller for a switch.

The specific technical solutions provided by the embodiments of the present invention are as follows:

In a first aspect, a method for automatically configuring a software-defined network includes:

When any controller determines that it becomes the primary controller, it enables the IP address to be used when any controller becomes the primary controller;

When any of the controllers receives a request from any of the switches to allocate the IP address as a destination controller, the controller assigned to the switch is determined and sent to the switch to indicate the assignment to the switch. Controller's message.

With reference to the first aspect, in a first possible implementation manner, the any controller determines a controller that is allocated to the switch, and includes:

The controller determines the current load status of each controller;

The controller determines the controller assigned to the switch based on the load conditions of the current respective controllers.

With reference to the first aspect, or the first possible implementation manner of the first aspect, in a second possible implementation manner, the controller that is allocated to the switch includes:

The master controller and the auxiliary controller are allocated to the switch, and the auxiliary controller is configured to replace the master controller to manage the switch when the master controller fails.

With reference to the first aspect, in a third possible implementation manner, the request for the allocation controller sent by the receiving switch includes:

Receiving a request from the distribution controller sent by the switch at the initial access; or

The request of the distribution controller sent by the receiving switch when it determines that the assigned controllers have failed.

In conjunction with the first aspect, in a fourth possible implementation, the method further includes: deactivating the IP address when the controller determines that it becomes a slave controller.

In conjunction with the first aspect, in a fifth possible implementation, the method further includes: - a controller management message.

In a second aspect, a method for automatically configuring a software-defined network includes:

The switch sends a request for allocating a controller, and the destination address carried in the request message is an IP address that needs to be used when any controller becomes the primary controller;

The switch receives a message returned by any controller that becomes the primary controller to indicate a controller assigned to the switch;

The switch configures a controller allocated by the primary controller according to the received message.

With reference to the second aspect, in a first possible implementation manner, the sending, by the switch, a request for an allocation controller includes:

The switch sends a request to allocate a controller upon initial access; or

The switch sends a request to allocate a controller when it is determined that all of the assigned controllers have failed. In a third aspect, a controller device includes: An IP address enabling unit, configured to enable an IP address to be used when any controller becomes the primary controller when it is determined to be the primary controller;

And an allocation indication unit, configured to: when receiving a request from the distribution controller that the switch sends the IP address as the destination address, determine a controller allocated to the switch, and send the switch to indicate the allocation to the switch Controller's message.

With reference to the third aspect, in a first possible implementation manner, when the allocation indication unit is used to determine a controller that is allocated to the switch, specifically:

Determine the current load status of each controller;

The controller assigned to the switch is determined according to the load conditions of the current respective controllers. With reference to the third aspect, or the first possible implementation manner of the third aspect, in a second possible implementation manner, the controller that is allocated by the allocation indication unit and allocated to the switch includes: a master that is allocated to the switch The control controller and the auxiliary controller are configured to replace the main control controller to manage the switch when the main control controller fails.

With reference to the third aspect, in a third possible implementation manner, when the allocation indication unit is configured to receive a request of a distribution controller sent by a switch, specifically:

In combination with the third aspect, in a fourth possible implementation, the device further includes:

The IP address deactivation unit is configured to deactivate the IP address when it is determined to be a slave controller. With reference to the third aspect, in a fifth possible implementation, the device further includes: an application layer communication unit, configured to receive, by the application layer device, a controller management message that sends the IP address as a destination address.

In a fourth aspect, a switch device includes:

a request sending unit, configured to send a request for assigning a controller, where the destination address carried in the request message is an IP address that is required when any controller becomes the primary controller;

a message receiving unit, configured to receive a message returned by the controller that becomes the primary controller to indicate a controller allocated to the switch;

a configuration unit, configured to configure, according to the received message, a controller allocated by the primary controller. With reference to the fourth aspect, in a first possible implementation manner, the request sending unit is specifically configured to:

Sending a request to allocate a controller upon initial access; or,

A request to allocate a controller is sent when it is determined that all of the assigned controllers have failed.

In a fifth aspect, a controller device includes:

The processor, when used to determine that it is the primary controller, enables an IP address to be used when any controller becomes the primary controller; and assigns control when any of the switches receives the IP address as the destination address Determining, by the device, a controller assigned to the switch; transmitting means for receiving a request from the distribution controller that the switch sends the IP address as the destination address, and sending the switch to indicate the assignment to the Switch controller Message.

With reference to the fifth aspect, in a first possible implementation manner, when the processor is used to determine a controller that is allocated to the switch, specifically:

Determine the current load status of each controller;

The controller assigned to the switch is determined according to the load conditions of the current respective controllers. With reference to the fifth aspect, or the first possible implementation manner of the fifth aspect, in a second possible implementation, the determining, by the processor, the controller that is allocated to the switch includes:

With reference to the fifth aspect, in a third possible implementation manner, when the transmitting device is configured to receive a request from a distribution controller sent by a switch, specifically:

In conjunction with the fifth aspect, in a fourth possible implementation, the processor is further configured to: when the slave controller is determined to be a slave controller, disable the IP address.

With reference to the fifth aspect, in a fifth possible implementation, the transmitting apparatus is further configured to: receive, by the application layer device, a controller management message that is sent by using the IP address as a destination address.

In a sixth aspect, a switch device includes:

a transmission device, configured to send a request for assigning a controller, where the destination address carried in the request message is an IP address that needs to be used when any controller becomes a primary controller; and receives any controller returned as a primary controller a message indicating the controller assigned to the switch;

a processor, configured to configure, according to the received message, a controller allocated by the primary controller. With reference to the sixth aspect, in a first possible implementation manner, when the transmitting apparatus is configured to send a request for a distribution controller, specifically:

Sending a request to allocate a controller upon initial access; or,

A seventh aspect, a software-defined network system, comprising: a controller cluster consisting of multiple controllers, and a switch;

The controller is configured to enable an IP address to be used when any controller becomes a primary controller when it becomes a primary controller; and send the IP address as a destination address when any switch is received When assigning a request from the controller, determining a controller assigned to the switch and transmitting a message to the switch indicating the controller assigned to the switch;

The switch is configured to send a request for a distribution controller, where the destination address carried in the request message is an IP address that needs to be used when any controller becomes the primary controller; receiving any controller that becomes the primary controller returns A message for indicating a controller assigned to the switch; configuring a controller assigned by the primary controller according to the received message.

In the embodiment of the present invention, when any controller determines that it becomes the primary controller, the IP address used for when any controller becomes the primary controller is enabled; when any of the controllers receives any When a switch requests the allocation controller to send the IP address as the destination address, it determines the controller assigned to the switch and sends a message to the switch indicating the controller assigned to the switch. By presetting the IP address specific to the main controller in the software-defined network, the switch can find the main controller through the IP address and request the main controller to assign a controller to itself, which solves the problem that the switch cannot be The problem that the main controller sends the request realizes that the main controller allocates the controller for each switch, and the controller configuration of the switch can be completed more efficiently than the manually configured method. DRAWINGS

1 is a schematic diagram of an apparatus of an open flow technology;

2 is a schematic diagram of a controller configuration of a switch;

3 is a schematic flowchart of an automatic configuration method of an SDN according to an embodiment of the present invention; FIG. 4 is another schematic flowchart of an automatic configuration method of an SDN according to an embodiment of the present invention; Schematic diagram of the deployment process;

6 is a schematic diagram of message flow of a switch and a controller in an SDN according to an embodiment of the present invention; FIG. 7 is a schematic diagram of a controller allocation result according to an embodiment of the present invention;

8 is a schematic flowchart of a re-election of a controller according to an embodiment of the present invention; FIG. 9 is a schematic flowchart of a fault processing process of a controller according to an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of a controller device according to an embodiment of the present invention;

11 is a schematic structural diagram of a switch device according to an embodiment of the present invention;

FIG. 12 is another schematic structural diagram of a control device according to an embodiment of the present invention;

FIG. 13 is another schematic structural diagram of a switch device according to an embodiment of the present disclosure;

FIG. 14 is a schematic structural diagram of an SDN system according to an embodiment of the present invention. detailed description

The embodiments of the present invention provide an automatic configuration method, device, and system for a software-defined network SDN, which are used to improve controller configuration efficiency of a switch.

Referring to FIG. 3, an automatic configuration method of an SDN according to an embodiment of the present invention includes:

When any controller of the S 30K determines itself to be the primary controller, it enables the IP address to be used when any controller becomes the primary controller.

Specifically, the controller determines that it becomes a master control or a slave controller according to an instruction of the controller cluster management software. The controller cluster management software currently used is called zookeeper and is used to manage the controller cluster. Each controller is pre-installed with a zookeeper, and the controllers are elected by zookeeper to determine the primary controller and the secondary controller.

Each controller is pre-configured with an identical IP address. The IP address is used only when the controller is elected as the primary controller. When the controller is a slave controller, the IP address is not used. At the same time, each switch is also pre-configured. The IP address is configured such that no matter which controller is the primary controller, the switch can send a message to the primary controller through the IP address to establish contact with the primary controller.

S302. When any one of the controllers receives any switch, the IP address is used as a destination. When a request is sent from the distribution controller, the controller assigned to the switch is determined and a message is sent to the switch indicating the controller assigned to the switch.

Specifically, when receiving the request of the distribution controller sent by the switch, the primary controller can obtain the IP address of the sender switch by parsing the request message, and after determining the controller allocated to the switch, pass the acquired sender. The IP address of the switch indicates the result of the assignment to the switch.

In the embodiment of the present invention, the controller is automatically allocated to each switch by the main controller, which improves the configuration efficiency of the switch. For a switch that does not send a request to the distribution controller, it may not be started, or it may have been assigned to a controller, and the primary controller does not need to be assigned.

Preferably, any controller in step S302 determines a controller that is allocated to the switch, and includes: any one of the controllers determines a current load status of each controller; The load status of the controller determines the controller assigned to the switch. The controller is assigned to the switch according to the load status of the controller, which can balance the load of each controller, effectively utilize resources, and improve network work efficiency. A possible specific allocation method is: determining the allocation priority of each controller according to the number of switches currently managed by the controller, wherein the controller with the least number of currently managed switches has the highest allocation priority, according to the allocation priority. The switch assigns a controller.

Preferably, the controller allocated to the switch determined in step S302 comprises: a master controller and a secondary controller assigned to the switch, and the auxiliary controller is configured to replace when the master controller fails The master controller manages the switch. Assigning two controllers to a switch is a typical distribution scheme, but embodiments of the present invention may also assign one controller or more than two controllers to the switch.

Preferably, the receiving the request of the distribution controller sent by the switch in step S302 comprises: receiving a request of the allocation controller sent by the switch when initially accessed; or sending the receiving switch when determining that the allocated controllers are all invalid. A request to assign a controller. Switch in initial access

In the SDN network, no controller is configured, and the controller is requested to be allocated to the main controller. When the switch finds that the assigned controllers have failed in succession, the controller is requested again from the main controller. It can be seen that the method of assigning a controller to the switch by the main controller can process the controller in the event that the controller has been faulty in time, which is more efficient and network fault-tolerant than the method of manually configuring the controller for the switch. Stronger, improving the robustness of SDN.

Preferably, the method further comprises: when the controller determines that it is a slave controller, deactivating the IP address. Specifically, the controller determines to become a slave controller when determining that it has failed, or determines that the controller becomes a slave controller according to the instruction of the controller cluster management software. Take the scene of controller cluster management using zookeepe r as an example. The zookeeper software of each controller exchanges information, determines that the original host controller loses support from most controllers, or determines that the original primary controller has failed to contact, and then re-initiates. The election determines the new primary controller. The newly determined primary controller enables the IP address that the primary controller needs to use, and the original primary controller becomes the secondary controller, and the IP address is no longer used. In this way, all controllers can be considered as a whole, and the changes of the main controller are invisible to the switch, and the switch does not need to be the main The controller changes any operation and still communicates with the main controller through the IP address that the main controller needs to use, which improves the working efficiency of the network.

Preferably, the method further includes: the any controller receiving a controller management message that the application layer device sends the IP address as a destination address. The application layer device is used to send a flow table to the controller, manage the flow table of the controller, and configure and manage the main controller. Therefore, the application layer device needs to be able to determine the main controller and communicate with the main controller. . Similar to the switch, the application layer device is pre-configured with the IP address that the primary controller needs to use. The application layer device can communicate with the primary controller through the IP address. The election result of the primary controller and the change of the primary controller are not correct. The application layer device has any impact, which improves the efficiency of the network.

Referring to FIG. 4, an automatic configuration method of an SDN according to an embodiment of the present invention includes:

The S40K switch sends a request to allocate a controller. The destination address carried in the request message is the IP address to be used when any controller becomes the primary controller.

S402. The switch receives a message returned by any controller that becomes the primary controller to indicate a controller assigned to the switch.

S403. The switch configures a controller allocated by the primary controller according to the received message. In this way, the controller is automatically assigned to the switch by the main controller, which improves the configuration efficiency of the switch compared to manually inputting the controller configured in the switch.

Preferably, the controller allocated to the switch includes: a master controller and a secondary controller; and the auxiliary controller is configured to take over the master controller to manage the switch when the master controller fails.

Preferably, the switch sends a request to allocate a controller, including:

The switch sends a request to allocate a controller upon initial access; or,

The switch sends a request to the distribution controller when it determines that the assigned controllers have failed.

The method provided by the embodiment of the present invention is described below in conjunction with a specific application scenario.

In order to be able to apply the method provided by the embodiment of the present invention in an existing SDN, each controller is configured with an identical IP address called a floating IP, and is added as a primary controller. The switch allocates the corresponding program of the controller, and an agent (agent) program is added to each switch for communication related to the controller allocation of the main controller, and the floating IP address needs to be pre-configured in the agent. At any one time, only the primary controller in the SDN is using a floating IP address.

Referring to Figure 5, the deployment process of the SDN environment includes:

The S50 installs the application layer function software on the application layer device, and configures the controller's floating IP information for subsequent service communication.

5502. Install controller function software on each controller, and configure the same floating IP for each controller, and the initial floating IP is a down state, that is, an unused state;

5503. After installing zookeeper, the zookeeper starts to manage the controller cluster;

5504. The zookeeper initiates the election of the main controller, and the floating IP of the main controller is the up state, that is, the use state, and the floating IP of the slave controller is kept in the down state;

5505. Install switch function software on each switch and configure it in the agent of the switch. Set the floating IP information;

5506. The switch triggering agent uses the configured floating IP to communicate with the controller cluster to obtain information about the controller that needs to be accessed.

5507. After receiving the request sent by the agent, the primary controller allocates a controller that needs to be accessed to the switch.

5508. The agent receives the returned information and configures the controller for the switch.

Referring to FIG. 6, is a message flow diagram of the switch and the controller in the SDN; the agent uses the floating IP to request the controller to allocate the access to the main controller, and the main controller instructs the switch to allocate the controller, and the allocation result is as shown in FIG. 7. Show.

See Figure 8. The re-election process of the controller cluster includes:

The S80 master controller fails or loses most of the slave controller support;

5802. The zookeeper initiates re-election of the main controller;

5803, the new primary controller floating IP is turned to the up state, the original primary controller becomes the slave controller, and the floating IP is turned to the down state.

See Figure 9. The fault handling process of the controller connected to the switch includes:

If the S90K network is faulty or the master controller process is abnormal, the switch determines that the connection with the master controller is interrupted.

5902. The switch switches to the auxiliary controller for service processing.

5903, the network failure or the auxiliary controller process is abnormal, and the switch determines that the connection with the auxiliary controller is interrupted;

5904. The controller triggers the agent to communicate with the primary controller in the controller cluster through the floating IP, and regains the accessed controller information.

5905. The primary controller reassigns the accessed controller to the switch.

Referring to FIG. 10, a controller device provided by an embodiment of the present invention includes:

The IP address enabling unit 1001 is configured to enable an IP address to be used when any controller becomes the primary controller when it is determined to be the primary controller;

The allocation instructing unit 1002 is configured to: when receiving a request from the distribution controller that the switch sends the IP address as the destination address, determine a controller allocated to the switch, and send the switch to indicate the allocation to the switch The message of the controller of the switch.

Preferably, when the allocation indication unit 1002 is used to determine the controller allocated to the switch, specifically for:

Determine the current load status of each controller;

The controller assigned to the switch is determined according to the load conditions of the current respective controllers. Preferably, the controller assigned to the switch by the allocation indication unit 1002 includes:

Preferably, the allocation indication unit 1002 is configured to receive the distribution controller sent by the switch. When requested, it is specifically used to:

Preferably, the device further comprises:

The IP address deactivation unit is configured to deactivate the IP address when it is determined to be a slave controller. Preferably, the device further comprises:

The application layer communication unit is configured to receive a controller management message that the application layer device sends the IP address as a destination address.

It should be noted that the controller device of this embodiment is for implementing the above steps S301-S302, and the above explanation and limitation of the method are also applicable to the controller device of the embodiment.

Referring to FIG. 11, a switch device provided by an embodiment of the present invention includes:

The request sending unit 1101 is configured to send a request for assigning a controller, where the destination address carried in the request message is an IP address that is required when any controller becomes the primary controller;

The message receiving unit 1102 is configured to receive a message returned by the controller that becomes the primary controller to indicate a controller that is allocated to the switch;

a configuration unit 1103, configured to configure, according to the received message, a control assigned by the primary controller, crying

Preferably, the controller allocated to the switch indicated by the message received by the message receiving unit 1102 includes:

The main controller and the auxiliary controller; the auxiliary controller is used to replace the main controller to manage the switch when the main controller fails.

Preferably, the request sending unit 1101 is specifically configured to:

Sending a request to allocate a controller upon initial access; or,

It should be noted that the switch device of this embodiment is to implement the foregoing steps S401-S403, and the foregoing explanation and limitation of the method are also applicable to the switch device of the embodiment.

Referring to FIG. 12, a controller device provided by an embodiment of the present invention includes:

The processor 1201 is configured to enable an IP address to be used when any controller becomes the primary controller when it becomes the primary controller; and allocate the IP address as the destination address when any switch is received. At the request of the controller, determining a controller assigned to the switch; the transmitting device 1202, configured to receive a request from the distribution controller that the switch sends the IP address as the destination address, and send the switch to indicate the allocation A message to the controller of the switch.

Preferably, when the processor 1201 is configured to determine a controller allocated to the switch, specifically, the processor 1201 is configured to:

Determine the current load status of each controller; The controller assigned to the switch is determined according to the load conditions of the current respective controllers. Preferably, the controller allocated by the processor 1201 to the switch includes: a master controller and an auxiliary controller assigned to the switch, and the auxiliary controller is configured to take over the master when the master controller fails The controller manages the switch.

Preferably, when the transmitting device 1202 is configured to receive a request from the distribution controller sent by the switch, the transmitting device 1202 is specifically configured to:

Preferably, the processor 1201 is further configured to disable the IP address when it becomes a slave controller.

Preferably, the transmitting device 1202 is further configured to receive, by the application layer device, the controller management message sent by using the IP address as a destination address.

Referring to FIG. 13, a switch device provided by an embodiment of the present invention includes:

The transmitting device 1301 is configured to send a request for allocating a controller, where the destination address carried in the request message is an IP address that needs to be used when any controller becomes the primary controller; receiving any controller that becomes the primary controller returns a message indicating the controller assigned to the switch;

The processor 1302 is configured to configure, according to the received message, a controller that is allocated by the primary controller. Preferably, the controller allocated to the switch indicated by the message received by the transmitting device 1301 includes:

Preferably, when the transmitting device 1301 is configured to send a request for assigning a controller, specifically: sending a request for allocating a controller during initial access; or

Referring to FIG. 14, an SDN system according to an embodiment of the present invention includes: a controller cluster composed of a plurality of controllers 1401, and a switch 1402;

The controller 1401 is configured to enable an IP address to be used when any controller becomes a primary controller when it becomes a primary controller; and send the IP address as a destination address when receiving any switch Determining a controller request, determining a controller assigned to the switch, and transmitting a message to the switch indicating the controller assigned to the switch;

The switch 1402 is configured to send a request for the allocation controller, where the destination address carried in the request message is an IP address that needs to be used when any controller becomes the primary controller; receiving any controller that becomes the primary controller returns a message for indicating a controller assigned to the switch; configuring a controller assigned by the master controller according to the received message.

In summary, the embodiment of the present invention provides an automatic configuration method, device, and system for an SDN. By defining a preset IP in the network, the controller cluster is a whole for the application layer device and the switch, and the application layer The device and the switch do not need to distinguish which controller is the primary controller, which realizes that the primary controller automatically allocates controllers for each switch, which improves the configuration efficiency of the switch. Rate, which improves the robustness of the system; and, when the main controller changes, the application layer devices and switches are not affected, improving network efficiency.

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can be embodied in the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) including computer usable program code.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart and/or block diagrams, and combinations of flows and/or blocks in the flowcharts and/or block diagrams can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

The spirit and scope of the invention. Thus, it is intended that the present invention covers such modifications and variations as the modifications and variations of the present invention are intended to be included within the scope of the present invention.

Claims

Rights request

1. An automatic configuration method for software-defined network SDN, characterized in that the method includes: when any controller determines that it becomes the master controller, enabling the IP that needs to be used when any controller becomes the master controller address;

When any controller receives a request from any switch to allocate the IP address as the destination address, determine the controller allocated to the switch, and send an instruction to the switch indicating allocation to the switch. messages from the controller.

2. The method according to claim 1, characterized in that the any controller determines the controller assigned to the switch, including:

Any of the controllers determines the current load status of each controller;

The any controller determines the controller assigned to the switch based on the current load status of each controller.

3. The method according to claim 1 or 2, characterized in that the controller assigned to the switch includes:

A main control controller and an auxiliary controller are assigned to the switch. The auxiliary controller is used to take over the management of the switch from the main control controller when the main control controller fails.

4. The method of claim 1, wherein receiving a request to allocate a controller sent by the switch includes:

Receive the request to assign a controller sent by the switch upon initial access; or,

Receives a request to assign a controller sent by the switch when it determines that all assigned controllers have failed.

5. The method of claim 1, characterized in that, the method further includes:

When any controller determines that it has become a slave controller, it deactivates the IP address.

6. The method of claim 1, wherein the method further includes: - controller management messages.

7. An automatic configuration method for software-defined network SDN, characterized in that the method includes: The switch sends a request to allocate a controller. The destination address carried in the request message is the one that needs to be used when any controller becomes the master controller. IP address;

The switch receives a message returned by any controller that becomes the master controller indicating the controller assigned to the switch;

The switch configures the controller allocated by the main controller according to the received message.

8. The method of claim 7, wherein the switch sends a request to allocate a controller, including:

The switch sends a request to allocate a controller during initial access; or,

The switch sends a request to allocate a controller when it is determined that all assigned controllers are invalid.

9. A controller device, characterized in that the device includes: The IP address enabling unit is used to determine when it becomes the master controller and enable the IP address that needs to be used when any controller becomes the master controller;

An allocation instruction unit, configured to determine the controller assigned to the switch when receiving a request from any switch to assign the IP address as the destination address, and send an instruction to the switch to assign the controller to the switch. messages from the controller.

10. The device according to claim 9, wherein when the allocation indication unit is used to determine the controller allocated to the switch, it is specifically used to:

Determine the current load status of each controller;

According to the current load status of each controller, the controller assigned to the switch is determined.

11. The device according to claim 9 or 10, characterized in that the controller assigned to the switch determined by the allocation instructing unit includes:

12. The device according to claim 9, wherein the allocation instruction unit is configured to receive the allocation controller request sent by the switch and includes:

The allocation instruction unit receives a request from the allocation controller sent by the switch during initial access; or,

The allocation instructing unit receives a request to allocate a controller sent by the switch when it is determined that all allocated controllers have failed.

13. The device according to claim 9, characterized in that, the device further includes:

The IP address deactivation unit is used to deactivate the IP address when it determines that it becomes a slave controller.

14. The device according to claim 9, characterized in that the device further comprises: an application layer communication unit, configured to receive a controller management message sent by the application layer device using the IP address as a destination address.

15. A switch device, characterized in that the device includes:

The request sending unit is used to send a request to allocate a controller. The destination address carried in the request message is the IP address that needs to be used when any controller becomes the main controller;

The message receiving unit is used to receive a message returned by any controller that becomes the master controller to indicate the controller assigned to the switch;

A configuration unit, configured to configure the controller assigned by the main controller according to the received message.

16. The device according to claim 15, characterized in that the request sending unit is specifically used to:

Send a request to assign a controller on initial access; or,

A request to allocate a controller is sent when it is determined that all assigned controllers have failed.

17. A software-defined network SDN system, including: a controller cluster composed of multiple controllers, and a switch, characterized by:

The controller, when determining that it becomes the master controller, enables the IP address that needs to be used when any controller becomes the master controller; when receiving the IP address sent by any switch as the destination address When assigning a controller request, determine the controller assigned to the switch, And send a message to the switch indicating the controller assigned to the switch; the switch is used to send a request to assign a controller, and the destination address carried in the request message is when any controller becomes the master controller. The IP address that needs to be used; Receive a message returned by any controller that becomes the master controller indicating the controller assigned to this switch; Configure the controller assigned by the master controller according to the received message.