CN110191061A - A campus network management system based on SDN technology - Google Patents

Abstract

The present invention provides a campus network management system based on SDN technology, including a controller, wherein a computer program is stored in the controller, and when the computer program is executed by the controller, the following steps are implemented: obtaining all The path of the link; calculating the bandwidth utilization rate of each link, and determining the link with the lowest bandwidth utilization rate; scheduling network traffic to the link with the lowest bandwidth utilization rate. The present invention utilizes the advantages of SDN in traffic management to reasonably schedule network traffic and improve network congestion; it realizes an optimal path algorithm based on bandwidth, and during the network peak period of the campus network, links in links with high bandwidth usage can be Traffic is forwarded to links with low bandwidth usage, effectively improving campus network congestion.

Description

A campus network management system based on SDN technology

technical field

The invention relates to the technical field of network traffic management, in particular to a campus network management system based on SDN technology.

Background technique

The campus network is a broadband multimedia network that provides teaching, scientific research and comprehensive information services for teachers and students. First of all, the campus network should provide an advanced information-based teaching environment for school teaching and scientific research. This requires: the campus network is a broadband, interactive function and highly professional local area network. Multimedia teaching software development platform, multimedia demonstration classroom, teacher preparation system, electronic reading room, teaching and examination database, etc. can all run on this network.

In-depth analysis of the current situation of the campus network, the current campus network has the following problems:

1. Deployment difficulties: The types of equipment used in the campus network are complex, such as routers, switches, firewalls, etc., and there are a large number of them. However, the campus network involves many departments, and the business is cumbersome, making network deployment difficult. At present, the business deployment of the campus network mainly relies on the command line of the professionals in the campus network center for professional management, but it is still difficult for the system to adapt to multiple devices when performing configuration management;

2. Difficulty in capacity expansion: With the increase in the number of campus network services and users, the original network can no longer meet the needs of school teaching, office and other network use. Therefore, the continuous expansion of the campus network leads to an increasingly large network structure. At the same time, various business requirements such as office, monitoring, data center, scientific research, visitors, and dormitories in the campus network make the network more complex. In addition, after multiple upgrades of the traditional campus network, there are many equipment providers on the campus network, and the types of network equipment are complex. When further expanding, it is necessary to consider various types of established networks, which makes expansion very difficult;

3. Difficulties in management: The wired system and the wireless system architecture in the campus network are inconsistent, and the system equipment and authentication policies all use their own unique management authentication systems. The current campus network lacks unified policy control, and it is difficult to coordinate and manage the campus network flexibly. As a result, campus network congestion is prone to occur during network peak periods.

Therefore, it is necessary to provide a new campus network management system based on SDN technology to solve the above technical problems.

Contents of the invention

Based on this, the present invention provides a campus network management system based on SDN technology, which is used to solve the problem of campus network congestion during network peak periods in the prior art.

The present invention provides a campus network management system based on SDN technology, including a controller, wherein a computer program is stored in the controller, and when the computer program is executed by the controller, the following steps are realized:

Obtain the paths of all links in the campus network;

calculating the bandwidth utilization of each of the links, and determining the link with the lowest bandwidth utilization;

Scheduling network traffic to the link with the lowest bandwidth utilization.

Further, network traffic is dispatched to the link with the lowest bandwidth utilization rate through the northbound interface of the Ryu controller.

Further, the campus network management system based on SDN technology also includes a network management platform, which is connected in communication with the controller; wherein, the network management platform is used to monitor the network status of the campus network.

Further, the network management platform communicates with the controller through a RESTful interface.

Further, the monitoring of the network status of the campus network by the network management platform specifically includes: generating visualized data to display the network status of the campus network.

In the campus network management system based on SDN technology provided by the present invention, when the computer program is executed by the controller, the following steps are implemented: obtaining the paths of all links in the campus network; calculating the bandwidth utilization ratio of each of the links , and determine the link with the lowest bandwidth utilization; and schedule network traffic to the link with the lowest bandwidth utilization. In this way, the optimal path algorithm based on bandwidth is realized. During the network peak period of the campus network, the traffic in the link with high bandwidth utilization can be forwarded to the link with low bandwidth utilization, effectively improving the campus network congestion problem.

Description of drawings

Fig. 1 is the work flowchart of the campus network management system based on SDN technology that the present invention provides;

Fig. 2 is a schematic diagram of program codes in the campus network management system based on SDN technology provided by the present invention;

Fig. 3 is the network bandwidth test figure of campus network in the prior art;

Fig. 4 is the network bandwidth test figure of campus network after adopting the campus network management system based on SDN technology that the present invention provides;

Fig. 5 is the first usage scenario diagram of the management platform in the campus network management system based on SDN technology provided by the present invention;

Fig. 6 is the second usage scenario diagram of the management platform in the campus network management system based on SDN technology provided by the present invention;

Fig. 7 is a usage scenario diagram of the campus network management system based on SDN technology provided by the present invention.

Detailed ways

In order to facilitate a better understanding of the present invention, the present invention will be further explained below in conjunction with the accompanying drawings of related embodiments. Embodiments of the invention are shown in the drawings, but the invention is not limited to the preferred embodiments described above. Rather, these embodiments are provided so that the disclosure of the invention will be more thorough.

The logic and/or steps represented in the flowcharts or otherwise described herein, for example, can be considered as a sequenced listing of executable instructions for implementing logical functions, can be embodied in any computer-readable medium, For use with instruction execution systems, devices, or devices (such as computer-based systems, systems including processors, or other systems that can fetch instructions from instruction execution systems, devices, or devices and execute instructions), or in conjunction with these instruction execution systems, devices or equipment for use.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structure, material or characteristic is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The invention provides a campus management system based on SDN technology.

Referring to Fig. 1, the campus network management system based on SDN technology includes a controller, and a computer program is stored in the controller, and when the computer program is executed by the controller, the following steps are realized:

Obtain the paths of all links in the campus network;

calculating the bandwidth utilization of each of the links, and determining the link with the lowest bandwidth utilization;

Scheduling network traffic to the link with the lowest bandwidth utilization.

In the campus network management system based on SDN technology provided by the present invention, when the computer program is executed by the controller, the following steps are implemented: obtaining the paths of all links in the campus network; calculating the bandwidth utilization ratio of each of the links , and determine the link with the lowest bandwidth utilization; and schedule network traffic to the link with the lowest bandwidth utilization. In this way, the optimal path algorithm based on bandwidth is realized. During the network peak period of the campus network, the traffic in the link with high bandwidth utilization can be forwarded to the link with low bandwidth utilization, effectively improving the campus network congestion problem.

In this embodiment, network traffic is scheduled to the link with the lowest bandwidth utilization rate through the northbound interface of the Ryu controller.

The campus network management system based on SDN technology also includes a network management platform, which communicates with the controller; wherein, the network management platform is used to monitor the network status of the campus network.

The network management platform communicates with the controller through a RESTful interface.

The monitoring of the network status of the campus network by the network management platform specifically includes: generating visualized data to display the network status of the campus network.

Please refer to Figs. 1-2, which are respectively a work flow diagram provided by the present invention and a schematic diagram of program codes in the campus network management system;

Among them, the selection of the path with the lowest broadband utilization rate is realized through the application of the optimal path in the network management system, and the relevant data is transmitted to the network management platform to provide a visualized topology structure and other relevant information, which is convenient for network managers to understand the network status .

In the present invention, when the computer program is executed by the controller, the following steps are implemented: obtain the paths of all links in the campus network; calculate the bandwidth utilization ratio of each of the links, and determine the link with the lowest bandwidth utilization ratio ; Scheduling network traffic to the link with the lowest bandwidth utilization. In this way, the optimal path algorithm based on bandwidth is realized. During the network peak period of the campus network, the traffic in the link with high bandwidth utilization can be forwarded to the link with low bandwidth utilization, effectively improving the campus network congestion problem.

Please refer to Fig. 4-5, the network bandwidth test diagram of the campus network after the campus network management system based on SDN technology provided by the present invention and the first usage scenario diagram of the management platform in the campus network management system based on SDN technology, the specific implementation example Down:

Enter "xterm h1h2h3h4" in the mininet console, and terminal emulators will be opened on h1, h2, h3, and h4; since h1 is a server, enter "iperf–s–i 1–M" in the terminal emulator of h1 , start the iperf service, so that h2, h3 and h4 can use iperf to test the bandwidth; then enter "iperf-c10.0.0.1-t 30-i 5-P 5-b800M" in the terminals of h2, h3 and h4 respectively , to test the bandwidth of the network.

From Figure 3-4, it can be seen that under the static route, h4 occupies most of the bandwidth, while h2 and h3 only have a small part of the bandwidth. In the state of SDN routing, the bandwidth is used evenly among the hosts, and the paths are allocated reasonably, so that there is no excessive bandwidth usage of a certain host in the static routing.

When sending packets with large traffic, the path from h2 (10.0.0.2) to h1 (10.0.0.1) is 7→4→2, and the path from h4 (10.0.0.4) to h1 is 8→4→2. It is consistent with the path shown in the previous network plateau. However, the path from h3 (10.0.0.3) to h1 is 7→4→3→2, which is different from the path 7→4→2 shown before. The node "3" is added to the path because 4→2 The bandwidth of a link has been consumed too much by h2 and h4, so the algorithm judges that this is not the optimal path, and automatically modifies the flow table so that the link from h3 to h1 is changed from 7→4→2 to 7→4→3 →2. The problem of network congestion is improved, which proves that the algorithm is effective.

The above-mentioned embodiments describe the technical principle of the present invention, and these descriptions are only for explaining the principle of the present invention, and cannot be construed as limiting the protection scope of the present invention in any way. Based on the explanations herein, those skilled in the art can think of other specific implementation modes of the present invention without creative efforts, and these modes will all fall within the protection scope of the present invention.

It should be understood that various parts of the present invention can be realized by hardware, software, firmware or their combination. In the embodiments described above, various steps or methods may be implemented by software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented by any one or combination of the following techniques known in the art: Discrete logic circuits, ASICs with suitable combinational logic gates, programmable gate arrays (PGAs), field programmable gate arrays (FPGAs), etc.

Claims (5)

1. A campus network management system based on SDN technology, it is characterized in that, comprises controller, is stored with computer program in described controller, when described computer program is carried out by described controller, realize following steps: Obtain the paths of all links in the campus network; calculating the bandwidth utilization of each of the links, and determining the link with the lowest bandwidth utilization; Scheduling network traffic to the link with the lowest bandwidth utilization. 2. The campus network management system based on SDN technology according to claim 1, wherein the network traffic is dispatched to the link with the lowest bandwidth utilization rate through the northbound interface of the Ryu controller. 3. The campus network management system based on SDN technology according to claim 1, wherein the campus network management system based on SDN technology also includes a network management platform, and the network management platform is connected in communication with the controller; wherein , the network management platform is used to monitor the network status of the campus network. 4. The campus network management system based on SDN technology according to claim 3, wherein the network management platform communicates with the controller through a RESTful interface. 5. the campus network management system based on SDN technology according to claim 1, is characterized in that, the network situation that described network management platform is used for monitoring campus network specifically comprises: Generate visual data to show the network status of the campus network.