CN105681193A

CN105681193A - Controller system for software defined network

Info

Publication number: CN105681193A
Application number: CN201610115864.7A
Authority: CN
Inventors: 付宏伟
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-03-02
Filing date: 2016-03-02
Publication date: 2016-06-15

Abstract

The invention relates to a controller system for a soft-defined network. The system comprises a front-end node and a storage node. The processing function and storage function of the controller are shared on multiple nodes, so that the system solves the bottle neck problem of the controller in the software-defined network. The invention further discloses a method for storing data forward information, the method is capable of generating multiple copies, the security and the usability of the data are improved.

Description

One software defined network controller system

Technical field

The present invention relates to Route control field, particularly to controller node and the system of software defined network.

Background technology

In software defined network, control to separate with data forwarding capability. Controller can manage network concentratedly, and data forwarding and place's reason physical switches or virtual switch complete. Data are exchanged by specified protocol (such as Openflow agreement) between controller and switch.

Define in network at traditional software, data forward and the strategy of process concentrates on a controller node, so facilitate design and the amendment of strategy, but the disposal ability of single controller node is limited, along with the increase of equipment in network, controller easily becomes the bottleneck of whole system.

On traditional controller node, data conversion transmission information and policy store on one node, do not have extensibility.

Summary of the invention

The technical problem to be solved is to provide a kind of controller system using multiple node. It by by the process of controller and storage function sharing on multiple nodes, solve software defined network middle controller bottleneck problem.

The node of controller is divided into two kinds: front end node and memory node. Controller can have one or more front end node, and front end node is similar to traditional controller node, but the storage of data conversion transmission information and strategy is separated, and is distributed on one or more memory node.

Data conversion transmission information is generally with the form storage of record, and the information in record generally includes: MAC Address, IP address, port numbers, VLANID, TunnelID etc. Each record in table should have a major key. Major key can be string or multiple row. Major key should be unique. Each record has one or more copy, and each copy has a copy number. Transcript number refers to that how many equivalent records are stored on all memory nodes. If one transcript number is n, the copy number of first copy is 1, and the copy number of second copy is 2, by that analogy. Transcript is improved the safety of data and the effect of availability.

Memory node can be deployed as arbitrary distributed storage cluster. During system read-write record, select storage device according to record, copy number.

When a record has multiple copy, according to above method, multiple copies of a record may select same equipment, and this situation is called conflict. When storage device is more than number of copies, if storage strategy is not allow for conflict, then the copy selection n+1 for conflicting is new copy number, if still there being conflict, then selects the copy number that n+2 position is new, by that analogy until not conflicting.Program only need to read a copy when read record, but needs to revise all of copy when write.

What the responsible data in system forwarded is switch or the virtual switch of supporting software defined network agreement. Only one of which controller in traditional software defined network, during only one of which front end node, switch is identical with the situation of one controller of tradition with arranging of virtual switch. When front end node is more than one. Need the deployment load balancing node at controller and switch and virtual switch.

Claims

1. the software defined network controller system of a multinode, it is characterised in that data conversion transmission information, tactful storage and process separate, and system includes:

Front end node can be one or more node, for receiving and responding the request supporting that switch is sent;

Memory node can be one or more node, is used for storing data conversion transmission information and processing strategy.

2. the software defined network controller system described in claim 1, it is characterised in that it can dispose one or more controller agent node load balancing to be responsible between switch and controller; Its process request comprises the following steps:

Step one: support in system that the switch of software defined network sends a request to certain front end node, or request is issued controller agent node, then forwarded a request to certain front end node by controller agent node according to load balancing;

Step 2: front end node finds the memory node of corresponding record according to the request received, reads or write records and forwarding strategy, then processes request according to data forwarding strategy;

Step 3: front end node needs to write back record according to strategy, and transmission request responds to switch.

3. method data conversion transmission information being stored in multiple storage device, it is characterized in that, data conversion transmission information is with the form storage of record, and each record represents a data forwarding information, and recorded content includes mac address, IP address, port numbers, VLANID etc.; Each record can have one or more copy, each copy to have a copy number; Storage device is selected according to record and copy number.