CN106972979A - A kind of network performance monitoring method and device based on SDN - Google Patents

Abstract

The invention discloses a method for monitoring network performance based on a software-defined network (SDN). The method includes: obtaining interface state information and interface parameters of each network node; and analyzing the interface state information and interface parameters of each network node , determine the target node and the target interface according to the preset index, and determine the target network link affected by the target interface; test the target network link according to the first preset rule, and determine the target network link to be diagnosed based on the test result Network link: performing a diagnostic test on the network link to be diagnosed according to a second preset rule, so as to lock the problematic network link. The invention also discloses an SDN-based network performance monitoring device at the same time. By adopting the technical scheme of the invention, an effective network performance test can be performed under the control of the SDN.

Description

A method and device for monitoring network performance based on SDN

technical field

The present invention relates to network monitoring technology, in particular to a method and device for monitoring network performance based on Software Defined Network (SDN, Software Defined Network).

Background technique

Network performance testing is the core component of the network management system and the main means to maintain the healthy operation of the network and optimize network resources. Existing network performance testing methods are mainly designed for existing networks, using separate physical detectors, software, and distributed network detection tools to test; but existing network performance testing methods have at least the following disadvantages: expensive; difficult to Unified management and operation; scattered information, non-targeted and low efficiency; difficult to achieve unified analysis and diagnosis.

SDN is a new network innovation architecture. Its core technology is to control the network in a centralized way by separating the control plane and data plane of the network, and the SDN application can use the global network view and status information of the SDN controller. to fulfill. Therefore, how to conduct effective network performance testing under the control of SDN has become an urgent problem to be solved.

Contents of the invention

In view of this, the present invention expects to provide an SDN-based network performance monitoring method and device, which can perform effective network performance testing under the control of SDN.

In order to achieve the above object, technical solution of the present invention is achieved in that way:

The present invention provides a method for monitoring network performance based on SDN, the method comprising:

Obtain the interface status information and interface parameters of each network node;

Analyzing the interface status information and interface parameters of each network node, determining the target node and the target interface according to preset indicators, and determining the target network link affected by the target interface;

testing the target network link according to a first preset rule, and determining the network link to be diagnosed based on the test result;

Perform a diagnosis test on the network link to be diagnosed according to the second preset rule, so as to lock the problematic network link.

In the above solution, preferably, the acquisition of interface status information and interface parameters of each network node includes:

Test the interface status and interface parameters of the interfaces of each network node according to the global topology diagram of SDN;

The interface status information and interface parameters of each network node are obtained based on the status test results.

In the above solution, preferably, analyzing the interface status information and interface parameters of each network node, and determining the target node and the target interface according to preset indicators include:

Generate a node status table based on the interface parameters and interface status information between each network node and each network node;

Check each row of data in the node state table one by one to find out the data that does not meet the preset indicators;

Analyze the data that does not meet the preset indicators, and determine the target node and target interface.

In the above solution, preferably, the testing of the target network link according to the first preset rule includes:

Generate a target link table according to the target node and the target interface;

Generate a first type of test data packet;

Send the first type of test data packet to the target link in the target link table;

Collecting and analyzing the first type of reply data packets returned by the target link.

In the above solution, preferably, sending the first type of test data packet to the target link in the target link table includes:

Send the first type of test packets N times to the target link in the target link table; wherein, N is a positive integer;

Correspondingly, collect and analyze the reply data packets returned by the target link, including:

Collecting the N times of the first type of reply data packets returned by the target link in the target link table for the N times of the first type of test data packets;

Analyzing the N times of the first type reply data packets.

In the above solution, preferably, performing a diagnosis test on the network link to be diagnosed according to the second preset rule includes:

Generate a second type of test data packet;

Send the second type of test data packet to the network link to be diagnosed;

Collecting and analyzing the second type of reply data packets returned by the network link to be diagnosed.

The present invention also provides an SDN-based network performance monitoring device, the device comprising:

An acquisition module, configured to acquire interface status information and interface parameters of each network node;

A determining module, configured to analyze the interface status information and interface parameters of each network node, determine the target node and the target interface according to preset indicators, and determine the target network link affected by the target interface;

The first testing module is configured to test the target network link according to a first preset rule, and determine the network link to be diagnosed based on the test result;

The second testing module is configured to perform a diagnostic test on the network link to be diagnosed according to a second preset rule, so as to lock the problematic network link.

In the above solution, preferably, the acquisition module is also used for:

Test the interface status and interface parameters of the interfaces of each network node according to the global topology diagram of SDN;

The interface status information and interface parameters of each network node are obtained based on the status test results.

In the above solution, preferably, the determination module is also used for:

Generate a node status table based on the interface parameters and interface status information between each network node and each network node;

Check each row of data in the node state table one by one to find out the data that does not meet the preset indicators;

Analyze the data that does not meet the preset indicators, and determine the target node and target interface.

In the above solution, preferably, the first test module is also used for:

Generate a target link table according to the target node and the target interface;

Generate a first type of test data packet;

Send the first type of test data packet to the target link in the target link table;

Collecting and analyzing the first type of reply data packets returned by the target link.

In the above solution, preferably, the first test module is also used for:

Send the first type of test packets N times to the target link in the target link table; wherein, N is a positive integer;

Correspondingly, collect and analyze the reply data packets returned by the target link, including:

Collecting the N times of the first type of reply data packets returned by the target link in the target link table for the N times of the first type of test data packets;

Analyzing the N times of the first type reply data packets.

In the above scheme, preferably, the second test module is used for:

Generate a second type of test data packet;

Send the second type of test data packet to the network link to be diagnosed;

Collecting and analyzing the second type of reply data packets returned by the network link to be diagnosed.

The SDN-based network performance monitoring method and device provided by the present invention can effectively test network performance under the control of SDN; effectively test network performance by adopting a multi-step adaptive algorithm to lock problematic network links, and can provide It provides a good basis for further network flow control and performance optimization.

Description of drawings

Fig. 1 is the SANPM overall framework schematic diagram that the present invention provides;

Fig. 2 is the implementation flowchart of the SDN-based network performance monitoring method provided by the present invention;

Fig. 3 is the state test schematic diagram of the network node provided by the present invention;

Fig. 4 is the test schematic diagram of the target network link provided by the present invention;

Fig. 5 is the test schematic diagram of the specific network link provided by the present invention;

Fig. 6 is the organizational chart of the equipment that realizes SANPM function provided by the present invention;

FIG. 7 is a schematic diagram of the composition and structure of the SDN-based network performance monitoring device provided by the present invention.

detailed description

In order to understand the characteristics and technical content of the present invention in more detail, the implementation of the present invention will be described in detail below in conjunction with the accompanying drawings. The attached drawings are only for reference and description, and are not intended to limit the present invention.

The basic idea of the present invention is to provide an SDN-based adaptive network performance monitoring method. The English abbreviation of the method can be expressed as "SDN-based Adaptive Network Performance Monitoring", which can be referred to as SANPM for short. The main idea of the solution in the present invention is to effectively test network performance by adopting a multi-step adaptive algorithm to lock problematic network links.

Fig. 1 is the schematic diagram of the overall architecture of SANPM provided by the present invention. As shown in Fig. 1, the overall architecture of SANPM is mainly divided into 3 major steps:

The first step: status report; specifically, test the interface status and interface parameters of each network node (such as R1, R2, R3, R4, R5, R6, R7 seven routers) according to the global topology diagram of SDN, and determine target network link;

The second step: target network link test and report; specifically, test the target network link determined in the first step, and determine the specific network link that needs to be tested again in the third step from the target network link ;

The third step: specific network link test and report; here, the specific network link refers to the network link to be diagnosed determined in the second step; specifically, through the test of the third step in the specific network link Lock down problematic network links.

In the following, the technical solution of the present invention will be described in detail through various embodiments.

Embodiment one

Fig. 2 is the implementation flowchart of the SDN-based network performance monitoring method provided by the present invention, as shown in Fig. 2, the method mainly includes the following steps:

Step 201: Obtain interface status information and interface parameters of each network node.

Preferably, the acquisition of interface status information and interface parameters of each network node may include:

Test the interface status and interface parameters of the interfaces of each network node according to the global topology diagram of SDN;

The interface status information and interface parameters of each network node are obtained based on the status test results.

Wherein, the interface status information includes: closed state, usually expressed by "Down", Down indicates that the link protocol of the interface is abnormal, or no IP address is configured on this interface; open state, usually expressed by "Up", UP indicates that the link protocol of the interface is in the normal startup state.

Wherein, the interface parameters may at least include: interface number, bandwidth utilization rate, and packet loss rate.

Wherein, the trigger mode of the interface status information and interface parameters of each network node may be event trigger or periodic trigger.

Step 202: Analyze the interface status information and interface parameters of each network node, determine the target node and the target interface according to preset indicators, and determine the target network link affected by the target interface.

Preferably, analyzing the interface status information and interface parameters of each network node, and determining the target node and the target interface according to preset indicators may include:

Generate a node status table based on the interface parameters and interface status information between each network node and each network node;

Check each row of data in the node state table one by one to find out the data that does not meet the preset indicators;

Analyze the data that does not meet the preset indicators, and determine the target node and target interface.

Here, the target node refers to a node in a crisis state, and the target interface refers to an interface in a crisis state.

Fig. 3 is the state test schematic diagram of the network node that the present invention provides, as shown in Fig. 3, under the coverage of SDN network, there are seven routers altogether of R1, R2, R3, R4, R5, R6, R7, network performance monitoring device Regularly collect the interface status information and interface parameters reported by each network node; generate a node status table based on the interface parameters and interface status information between each network node and each network node; check each row in the node status table one by one Data, find out the data that does not meet the preset indicators; analyze the data that does not meet the preset indicators, and determine the target node and target interface. Here, for different types of parameters, the preset indicators corresponding to different types of parameters are different, and the preset indicators corresponding to some parameter types are fixed values, and the preset indicators corresponding to some parameter types are within a certain range.

Specifically, the node state table can be as shown in Table 1:

Node R5 interface status bandwidth utilization Packet loss rate judgment status interface 1 down 90% 0 crisis Interface 2 up measured value measured value crisis Interface 3 up measured value 0 non-crisis … … … … …

Table 1

Step 203: Test the target network link according to the first preset rule, and determine the network link to be diagnosed based on the test result.

Preferably, the testing the target network link according to the first preset rule may include:

Generate a target link table according to the target node and the target interface;

Generate a first type of test data packet;

Send the first type of test data packet to the target link in the target link table;

Collecting and analyzing the first type of reply data packets returned by the target link.

Here, how to specifically generate the first type of test data packets can be realized by referring to the method for generating test data packets in the prior art. The first type of test data packet is a test data packet for determining a link in a crisis state.

Wherein, the first type of reply data packet refers to the response data returned by the target link to the first type of test data packet.

Here, the first type of test data packet can be set according to actual needs. That is to say, determining whether a link is in a crisis state may be selected according to a preset crisis index.

Wherein, the first test data packet can be aimed at the test of each parameter index, for example, in the first test data packet, multiple parameters in the parameters such as delay change, packet loss rate, and time deviation in Table 2 can be tested. carry out testing.

Based on the schematic diagram of the state test of the network node shown in Figure 3 above, Figure 4 is a schematic diagram of the test of the target network link provided by the present invention, as shown in Figure 4, under the coverage of the SDN network, there are R1, R2, R3, R4 . Each related target link reports the test condition of the target link to the network performance monitoring device, and returns the first type of reply data packet.

Specifically, the target link table can be as shown in Table 2:

Table 2

Preferably, sending the first type of test data packet to the target link in the target link table may include:

Sending the first-type test data packet N times to the target link in the target link table; wherein, N is a positive integer.

Correspondingly, collecting and analyzing the reply data packet returned by the target link may include:

Collecting the first type reply packets returned by the target link in the target link table for N times;

Analyzing the N times of the first type reply data packets.

That is to say, the first type of test data packets can be repeatedly sent to the target link to prevent the network performance monitoring device from failing to send the first type of test data packets to the target link or missing the first type of test data packets returned by a certain target link. reply packet.

Moreover, analyzing multiple sets of first-type reply data packets can further improve the accuracy of evaluating the target link.

Step 204: Carry out a diagnostic test on the network link to be diagnosed according to a second preset rule, so as to lock the problematic network link.

Preferably, the performing a diagnosis test on the network link to be diagnosed according to the second preset rule may include:

Generate a second type of test data packet;

Send the second type of test data packet to the network link to be diagnosed;

Collecting and analyzing the second type of reply data packets returned by the network link to be diagnosed.

Here, how to specifically generate the second type of test data packets can be realized by referring to the method for generating test data packets in the prior art. The second type of test data packet is a test data packet used to diagnose the network link to be diagnosed.

Wherein, the second type of reply data packet refers to the response data returned by the target link to the second type of test data packet.

Here, the second test data packet can be aimed at the test of a specific indicator, for example, the second test data packet can be more than one of the parameters in Table 2 such as delay change, or packet loss rate, or time deviation. to test.

Based on the test schematic diagram of the target network link shown in Figure 4 above, Figure 5 is a test schematic diagram of a specific network link provided by the present invention, as shown in Figure 5, under the coverage of the SDN network, there are R1, R2, R3, R4 , R5, R6, and R7 have seven routers altogether, and the network performance monitoring device sends the second type of test packet to the target link (indicated by a thick dashed line in Fig. 5) to be confirmed related to the target node R5; The target link to be diagnosed related to point R5 reports the test condition of the target link to the network performance monitoring device, and returns the second type of reply data packet.

Preferably, after the problematic network link is locked, the method may further include:

Analyze and record network performance based on diagnostic results.

Wherein, the network performance may be the quality of service (QoS, Quality of Service) of the network

Of course, QoS can be calculated by combining one or more of the following network performance indicators:

Rate, bandwidth, throughput, delay, round-trip time (RTT, Round-TripTime), utilization, network packet loss rate, etc.

This embodiment provides an SDN-based network performance monitoring method, which uses a multi-step adaptive algorithm to effectively test network traffic performance to lock problematic network links, which can provide a good solution for further network traffic control and performance optimization. basis. The technical solution described in this embodiment fills the gap in the application of SDN in network performance testing; at the same time, it can replace traditional network performance testing methods. The technical solution described in this embodiment has the advantages of high efficiency, strong pertinence, easy deployment, easy implementation, and low cost.

Embodiment two

Fig. 6 is the organization chart of the equipment that realizes SANPM function that the present invention provides, as shown in Fig. 6, described equipment that realizes SANPM function mainly comprises four parts:

Node state table 61, link table 62, crisis analysis unit 63, test data packet processing and analysis unit 64; wherein,

The node status table 61 includes interface parameters and interface status information between each network node and each network node; for example, the node status table 61 may include the status of a switch or a router, and all interfaces of a switch or a router. Interface status, bandwidth utilization, packet loss rate, etc.;

The link table 62 includes a target link table 621 and a specific link table 622, the target link table 621 stores links affected by the target interface; the specific link table 622 stores links to be diagnosed Whether it is the link of the problem link;

The crisis analysis unit 63 is used to determine the target node and the target interface according to the preset indicators; determine the network link to be diagnosed according to the preset crisis indicators;

The test data packet processing and analysis unit 64 is used to send the test data packet, receive the reply data packet, and analyze the reply data packet.

In practical applications, the implementation of the device for implementing the SANPM function may be determined according to the general functions of the SDN controller.

Embodiment Three

According to the organizational structure diagram shown in FIG. 6, this embodiment provides a network performance monitoring device. FIG. 7 is a schematic diagram of the composition and structure of the SDN-based network performance monitoring device provided by the present invention. As shown in FIG. 7, the device Including: an acquisition module 71, a determination module 72, a first test module 73 and a second test module 74; wherein,

The acquiring module 71 is configured to acquire interface status information and interface parameters of each network node;

The determination module 72 is configured to analyze the interface status information and interface parameters of each network node, determine the target node and the target interface according to preset indicators, and determine the target network link affected by the target interface;

The first testing module 73 is configured to test the target network link according to a first preset rule, and determine the network link to be diagnosed based on the test result;

The second testing module 74 is configured to perform a diagnostic test on the network link to be diagnosed according to a second preset rule, so as to lock the problematic network link.

Preferably, the acquiring module 71 is also used for:

Test the interface status and interface parameters of the interfaces of each network node according to the global topology diagram of SDN;

The interface status information and interface parameters of each network node are obtained based on the status test results.

Preferably, the determination module 72 is also used for:

Generate a node status table based on the interface parameters and interface status information between each network node and each network node;

Check each row of data in the node state table one by one to find out the data that does not meet the preset indicators;

Analyze the data that does not meet the preset indicators, and determine the target node and target interface.

Preferably, the first testing module 73 is also used for:

Generate a target link table according to the target node and the target interface;

Generate a first type of test data packet;

Send the first type of test data packet to the target link in the target link table;

Collecting and analyzing the first type of reply data packets returned by the target link.

Preferably, the first testing module 73 is also used for:

Send the first type of test packets N times to the target link in the target link table; wherein, N is a positive integer;

Correspondingly, collect and analyze the reply data packets returned by the target link, including:

Collecting the first type reply packets returned by the target link in the target link table for N times;

Analyzing the N times of the first type reply data packets.

Preferably, the second testing module 74 is also used for:

Generate a second type of test data packet;

Send the second type of test data packet to the network link to be diagnosed;

Collecting and analyzing the second type of reply data packets returned by the network link to be diagnosed.

Those skilled in the art should understand that the functions of each module in the network performance monitoring device of this embodiment can be understood by referring to the relevant description of the aforementioned network performance monitoring method, and that each module in the network performance monitoring device of this embodiment can be realized by implementing this The functions described in the embodiments may be realized by analog circuits, or may be realized by running software executing the functions described in the embodiments on network devices.

In practical applications, the network performance monitoring device described in this embodiment can be set in network equipment; the acquisition module 71, the determination module 72, the first test module 73 and the second test module 74 can all be controlled by the network performance monitoring device Or a central processing unit (CPU, Central Processing Unit), a microprocessor (MPU, Micro Processor Unit), a digital signal processor (DSP, Digital Signal Processor) or a field programmable gate in the network equipment to which the network performance monitoring device belongs Array (FPGA, Field Programmable Gate Array) and other implementations.

The SDN-based network performance monitoring device described in this embodiment can effectively test network performance under the control of SDN; effectively test network performance by adopting a multi-step adaptive algorithm to lock problematic network links, which can provide further network Flow control and performance optimization provide a good basis.

In the several embodiments provided by the present invention, it should be understood that the disclosed methods, devices and electronic equipment can be implemented in other ways. The device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods, such as: multiple units or components can be combined, or May be integrated into another system, or some features may be ignored, or not implemented. In addition, the mutual coupling, or direct coupling, or communication connection between the various components shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms. of.

The units described above as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units; Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present invention can be integrated into one processing unit, or each unit can be used as a single unit, or two or more units can be integrated into one unit; the above-mentioned integration The unit can be realized in the form of hardware or in the form of hardware plus software functional unit.

Those of ordinary skill in the art can understand that all or part of the steps for realizing the above-mentioned method embodiments can be completed by hardware related to program instructions, and the aforementioned program can be stored in a computer-readable storage medium. When the program is executed, the Including the steps of the foregoing method embodiment; and the aforementioned storage medium includes: various storage devices, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk A medium on which program code can be stored.

Alternatively, if the above-mentioned integrated units in the embodiments of the present invention are implemented in the form of software function modules and sold or used as independent products, they may also be stored in a computer-readable storage medium. Based on this understanding, the technical solutions of the embodiments of the present invention can be embodied in the form of software products in essence or the part that contributes to the prior art. The computer software products are stored in a storage medium and include several instructions for Make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the methods described in various embodiments of the present invention. The aforementioned storage medium includes: various media capable of storing program codes such as removable storage devices, ROM, RAM, magnetic disks or optical disks.

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

Claims (12)

1. A network performance monitoring method based on a Software Defined Network (SDN), the method comprising:

acquiring interface state information and interface parameters of each network node;

analyzing the interface state information and interface parameters of each network node, determining a target node and a target interface according to preset indexes, and determining a target network link influenced by the target interface;

testing the target network link according to a first preset rule, and determining the network link to be diagnosed based on a test result;

and carrying out diagnosis test on the network link to be diagnosed according to a second preset rule so as to lock the network link with the problem.

2. The method of claim 1, wherein the obtaining interface status information and interface parameters of each network node comprises:

testing the interface state and interface parameters of the interface of each network node according to a global topological graph of the SDN;

and acquiring interface state information and interface parameters of each network node based on the state test result.

3. The method of claim 1, wherein analyzing the interface state information and the interface parameters of each network node and determining the target node and the target interface according to the preset index comprises:

generating a node state table based on the interface parameters and the interface state information of each network node and each network node;

checking each row of data in the node state table one by one, and finding out data which do not accord with preset indexes;

and analyzing the data which do not accord with the preset indexes to determine a target node and a target interface.

4. The method according to claim 1, wherein the testing the target network link according to the first preset rule comprises:

generating a target link table according to the target node and the target interface;

generating a first type test data packet;

sending the first type of test data packet to a target link in a target link table;

and collecting and analyzing a first type reply data packet returned by the target link.

5. The method of claim 4, wherein sending the first type of test packet to the target link in the target link table comprises:

sending N times of first-class test data packets to a target link in a target link table; wherein N is a positive integer;

accordingly, collecting and analyzing the reply data packet returned by the target link comprises:

collecting first-class reply data packets returned by a target link in a target link table for N times;

and analyzing the first-class reply data packet for N times.

6. The method according to claim 1, wherein performing a diagnosis test on the network link to be diagnosed according to a second preset rule comprises:

generating a second type test data packet;

sending the second type of test data packet to a network link to be diagnosed;

and collecting and analyzing a second type reply data packet returned by the network link to be diagnosed.

7. A network performance monitoring device based on a software defined network, SDN, the device comprising:

the acquisition module is used for acquiring interface state information and interface parameters of each network node;

the determining module is used for analyzing the interface state information and the interface parameters of each network node, determining a target node and a target interface according to preset indexes, and determining a target network link influenced by the target interface;

the first testing module is used for testing the target network link according to a first preset rule and determining the network link to be diagnosed based on a testing result;

and the second testing module is used for performing diagnosis confirming testing on the network link to be diagnosed according to a second preset rule so as to lock the problem network link.

8. The apparatus of claim 7, wherein the obtaining module is further configured to:

testing the interface state and interface parameters of the interface of each network node according to a global topological graph of the SDN;

and acquiring interface state information and interface parameters of each network node based on the state test result.

9. The apparatus of claim 8, wherein the determining module is further configured to:

generating a node state table based on the interface parameters and the interface state information of each network node and each network node;

checking each row of data in the node state table one by one, and finding out data which do not accord with preset indexes;

and analyzing the data which do not accord with the preset indexes to determine a target node and a target interface.

10. The apparatus of claim 7, wherein the first testing module is further configured to:

generating a target link table according to the target node and the target interface;

generating a first type test data packet;

sending the first type of test data packet to a target link in a target link table;

and collecting and analyzing a first type reply data packet returned by the target link.

11. The apparatus of claim 10, wherein the first testing module is further configured to:

sending N times of first-class test data packets to a target link in a target link table; wherein N is a positive integer;

accordingly, collecting and analyzing the reply data packet returned by the target link comprises:

collecting first-class reply data packets returned by a target link in a target link table for N times;

and analyzing the first-class reply data packet for N times.

12. The apparatus of claim 7, wherein the second testing module is further configured to:

generating a second type test data packet;

sending the second type of test data packet to a network link to be diagnosed;

and collecting and analyzing a second type reply data packet returned by the network link to be diagnosed.