CN106161067B - A test method and system for network management node statistics - Google Patents

Abstract

The invention discloses a kind of test methods of network management node statistics, it include: to read the first statistical value of the network management node at the first moment, the second statistical value of the network management node is read at the second moment, first and second moment was two moment for beating stream constant rate, the time difference at the second moment and the first moment is the integral multiple of network management node data update cycle, and first statistical value and the second statistical value are the numerical value of network management statistics；Utilize the corresponding actual value of network management node described in the packet catcher statistics third moment to the 4th time section, third and fourth moment is two moment for beating stream constant rate, and the 4th moment is equal with the time difference at the first moment with the time difference at third moment with the second moment；Difference between first statistical value and second statistical value that the corresponding actual value of the network management node is counted with network management is compared.The present invention further simultaneously discloses a kind of system for realizing the method.

Description

A test method and system for network management node statistics

technical field

The invention relates to the technical field of network management testing, in particular to a method and system for testing network management node statistics.

Background technique

In the prior art, the network administrator monitors the network equipment through the network management system, the monitored equipment regularly reports the status data of itself or the network to the network management system, and the network management system monitors the equipment and the network by collecting the reported status data. These status data are composed of various parameters that reflect the operating status of the device or network, and each parameter here is called a network management node.

Whether the parameters recorded by the network management node of the device are consistent with the actual situation needs to be checked by testing. Some network management nodes that count data traffic, such as the number of bytes received by device ports, cannot be accurately measured using traditional methods, because:

1) In addition to the data packets of the device under test, there are also management control protocol packets in the network. The sending time and quantity of the data packets of the device under test are controllable, and the sending time of the management control protocol packets is controllable. However, the actual test does not count all the management and control protocol packets received by the device under test, and the test error is relatively large;

2) The statistics of network and device parameters by the network management node are not real-time, but are counted according to the set periodic interval and reported the parameters to be tested, and the data update of the network management node is not synchronized with the statistical test operation, resulting in a large test error.

SUMMARY OF THE INVENTION

In order to solve the existing technical problems, the embodiments of the present invention provide a method and system for testing network management node statistics.

An embodiment of the present invention provides a method for testing network management node statistics, the method comprising:

The first statistical value of the network management node is read at the first moment, and the second statistical value of the network management node is read at the second moment. The first and second moments are two moments when the flow rate is constant, so The time difference between the second moment and the first moment is an integer multiple of the data update period of the network management node, and the first statistical value and the second statistical value are the values of the network management statistics;

Use the packet capture tool to count the actual values corresponding to the network management nodes in the time period from the third time to the fourth time. The time difference is equal to the time difference between the second moment and the first moment;

The actual value corresponding to the network management node is compared with the difference between the first statistical value and the second statistical value counted by the network management.

In one embodiment, the first moment and the third moment are different moments, and the second moment and the fourth moment are different moments.

In one embodiment, the first time and the third time are the same time, and the second time and the fourth time are the same time.

In one embodiment, the method further includes:

Before starting to read the statistical value of the network management node and start capturing packets, start to perform the streaming operation, and after finishing reading the statistical value of the network management node or ending capturing packets, end the streaming operation;

The streaming operation is used to establish a data stream between the network device under test corresponding to the network management node and other network devices via the switch.

Wherein, the actual value corresponding to the network management node in the time period from the third moment to the fourth moment is counted by using the packet capture tool, including:

Grab all data packets in the time period from the third moment to the fourth moment, and filter out the data packets of the network management node to be counted from all the captured data packets according to the preset identifier. The identifier is used to distinguish the data packets of the network management node to be counted from other data packets; and an actual value corresponding to the statistical value of the network management node is calculated according to the filtered data packets.

Wherein, the data packets of the network management node to be counted include: data packets of traffic flow and management control protocol packets.

The embodiment of the present invention also provides a test system for network management node statistics, the system includes: a reading unit, a grabbing statistics unit, and a comparison unit; wherein,

The reading unit is configured to read the first statistical value of the network management node at the first moment, and read the second statistical value of the network management node at the second moment, and the first and second moments are streaming Two moments when the rate is constant, the time difference between the second moment and the first moment is an integer multiple of the data update period of the network management node, and the first statistical value and the second statistical value are the values of the network management statistics ;

The capture statistics unit is configured to use the packet capture tool to count the actual values corresponding to the network management nodes in the time period from the third moment to the fourth moment, where the third and fourth moments are two moments when the streaming rate is constant, The time difference between the fourth moment and the third moment is equal to the time difference between the second moment and the first moment;

The comparing unit is configured to compare the actual value corresponding to the network management node with the difference between the first statistical value and the second statistical value counted by the network management.

In one embodiment, the first moment and the third moment are different moments, and the second moment and the fourth moment are different moments.

In one embodiment, the first time and the third time are the same time, and the second time and the fourth time are the same time.

In one embodiment, the system further includes: a streaming unit, configured to start to perform a streaming operation before starting to read the statistical value of the network management node and start capturing packets, and then finish reading the statistical value of the network management node or end capturing packets. After that, end the streaming operation;

The streaming operation is used to establish a data stream between the network device under test corresponding to the network management node and other network devices via the switch.

In the method and system for testing network management node statistics provided by the embodiments of the present invention, the first statistical value of the network management node is read at the first moment, the second statistical value of the network management node is read at the second moment, and the first statistical value of the network management node is read at the second moment. Moments 1 and 2 are two times when the flow rate is constant. The time difference between the second time and the first time is an integer multiple of the data update period of the network management node. The first statistical value and the second time The statistical value is the value of the network management statistics; the actual value corresponding to the network management node in the time period from the third time to the fourth time is calculated by using the packet capture tool. The third and fourth time are two times when the flow rate is constant, so The time difference between the fourth moment and the third moment is equal to the time difference between the second moment and the first moment; the actual value corresponding to the network management node and the first statistical value and the second statistical value calculated by the network management Differences between statistical values are compared. The embodiment of the present invention overcomes the problem of missing statistics of management control messages caused by the asynchronous test operation and network management node data update in the traditional test method, the test accuracy is greatly improved, and the error approaches zero; at the same time, the network management node data read and Packet capture can be performed separately and independently, and the test process is relatively simple, which is convenient for precise control and easy execution; in addition, the measurement error in the embodiment of the present invention has nothing to do with the specific operation of the test, each test is basically the same, and the error is constant, which is convenient for error statistics. and estimates.

Description of drawings

In the drawings, which are not necessarily to scale, like reference numerals may describe like parts in the different views. Similar reference numbers with different letter suffixes may denote different instances of similar components. The accompanying drawings generally illustrate, by way of example and not limitation, the various embodiments discussed herein.

FIG. 1 is a flow chart for implementing a method for counting and testing network management nodes according to an embodiment of the present invention;

2 is a schematic diagram of a system structure of a statistical testing network management node according to an embodiment of the present invention;

3 is a schematic diagram of a system structure of a statistical testing network management node according to another embodiment of the present invention;

Fig. 4 is the network topology diagram of traditional test method;

Figure 5 is a demonstration diagram of the traditional test method;

Figure 6 is a demonstration diagram of the inaccurate problem analysis of the traditional test method;

FIG. 7 is a demonstration diagram of the testing method described in the specific application scenario of the present invention.

Detailed ways

In the embodiment of the present invention, the first statistical value of the network management node is read at the first moment, and the second statistical value of the network management node is read at the second moment, and the first and second moments are the streaming rate Two constant moments, the time difference between the second moment and the first moment is an integer multiple of the data update period of the network management node, and the first statistical value and the second statistical value are the values of the network management statistics; Use the packet capture tool to count the actual values corresponding to the network management nodes in the time period from the third time to the fourth time. The time difference is equal to the time difference between the second moment and the first moment; compare the packet capture statistic value with the difference between the first statistic value and the second statistic value counted by the network management.

The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

FIG. 1 is a flow chart for implementing a method for counting and testing network management nodes according to an embodiment of the present invention. As shown in FIG. 1 , the method includes:

Step 101: Read the first statistical value of the network management node at the first moment, and read the second statistical value of the network management node at the second moment. The first and second moments are two with a constant flow rate. time, the time difference between the second time and the first time is an integer multiple of the data update period of the network management node, and the first statistical value and the second statistical value are the values of the network management statistics;

Step 102: Use the packet capture tool to count the actual values corresponding to the network management nodes in the time period from the third time to the fourth time. The third and fourth time are two times when the flow rate is constant. The time difference at the third moment is equal to the time difference between the second moment and the first moment;

Step 103: Compare the actual value corresponding to the network management node with the difference between the first statistical value and the second statistical value counted by the network management.

The embodiment of the present invention overcomes the problem of missing statistics of management control messages caused by asynchronous test operation and network management node data update in the traditional test method, the test accuracy is greatly improved, and the error approaches zero. In addition, the measurement error in the embodiment of the present invention has nothing to do with the specific operation of the test. Each test is basically the same, and the error is constant, which is convenient for error statistics and estimation.

In one embodiment, the first moment and the third moment are different moments, and the second moment and the fourth moment are different moments.

It can be seen that, in the embodiment of the present invention, the data reading and packet capturing of the network management node can be performed separately and independently, and the test process is relatively simple, which is convenient for precise control and easy execution.

In one embodiment, the first time and the third time are the same time, and the second time and the fourth time are the same time.

In the embodiment of the present invention, the method further includes:

Before starting to read the statistical value of the network management node and start capturing packets, start to perform the streaming operation, and after finishing reading the statistical value of the network management node or ending capturing packets, end the streaming operation;

The streaming operation is used to establish a data stream between the network device under test corresponding to the network management node and other network devices via the switch.

In the embodiment of the present invention, the statistics of the actual values corresponding to the network management nodes in the time period from the third time to the fourth time by using a packet capture tool include:

Grab all data packets in the time period from the third moment to the fourth moment, and filter out the data packets of the network management node to be counted from all the captured data packets according to the preset identifier. The identifier is used to distinguish the data packets of the network management node to be counted from other data packets; according to the filtered data packets, the actual value corresponding to the statistical value of the network management node is calculated

For example: the network management node to be tested is set as "number of bytes received by port 1 of the device under test", and all data packets captured include the data packets received by port 1 of the device under test, and also Including other data packets such as data packets sent by port 1 of the device under test.

In the embodiment of the present invention, the data packets of the network management nodes to be counted include: data packets of traffic flow and management control protocol packets.

The embodiment of the present invention also provides a test system for network management node statistics. As shown in FIG. 2, the system includes: a reading unit 201, a grabbing statistics unit 202, and a comparison unit 203; wherein,

The reading unit 201 is configured to read the first statistical value of the network management node at the first moment, and read the second statistical value of the network management node at the second moment. Two moments when the flow rate is constant, the time difference between the second moment and the first moment is an integer multiple of the data update period of the network management node, and the first statistical value and the second statistical value are calculated by the network management value;

The capture statistics unit 202 is configured to use the packet capture tool to count the actual values corresponding to the network management nodes in the time period from the third time to the fourth time, where the third and fourth time are two times when the flow rate is constant , the time difference between the fourth moment and the third moment is equal to the time difference between the second moment and the first moment;

The comparing unit 203 is configured to compare the actual value corresponding to the network management node with the difference between the first statistical value and the second statistical value counted by the network management.

The embodiment of the present invention overcomes the problem of missing statistics of management control messages caused by asynchronous test operation and network management node data update in the traditional test method, the test accuracy is greatly improved, and the error approaches zero. In addition, the measurement error in the embodiment of the present invention has nothing to do with the specific operation of the test. Each test is basically the same, and the error is constant, which is convenient for error statistics and estimation.

In one embodiment, the first moment and the third moment are different moments, and the second moment and the fourth moment are different moments.

It can be seen that, in the embodiment of the present invention, the data reading and packet capturing of the network management node can be performed separately and independently, and the test process is relatively simple, which is convenient for precise control and easy execution.

In one embodiment, the first time and the third time are the same time, and the second time and the fourth time are the same time.

In one embodiment, as shown in FIG. 3 , the system further includes: a streaming unit 204 for starting to perform streaming operations before starting to read the statistical value of the network management node and starting to capture packets, and after finishing reading the network management node. After the statistical value of , or the end of capturing packets, end the streaming operation;

The streaming operation is used to establish a data stream between the network device under test corresponding to the network management node and other network devices via the switch.

In the embodiment of the present invention, the capture statistics unit 202 uses a packet capture tool to count the actual values corresponding to the network management nodes in the time period from the third time to the fourth time, including:

Grab all data packets in the time period from the third moment to the fourth moment, and filter out the data packets of the network management node to be counted from all the captured data packets according to the preset identifier. The identifier is used to distinguish the data packets of the network management node to be counted from other data packets; and an actual value corresponding to the statistical value of the network management node is calculated according to the filtered data packets.

Wherein, the data packets of the network management nodes to be counted include: streaming data packets and management control protocol packets.

In order to describe the embodiments of the present invention more clearly, the following first describes the testing method of the traditional network management node. The network topology diagram of the traditional testing method is shown in Fig. 4. In combination with Fig. 5, the network management node is used as the "tested device". The number of bytes received by port 1" is taken as an example to illustrate the test process as follows:

Step 1: Read the value of "Number of bytes received by port 1 of the device under test" of the network management node through the network management system simulator 401, denoted as A, and start the packet capture tool 402 to capture the port 1 of the device under test 403 to receive data packets, and at the same time use the streaming tool 404 to establish a data flow from other network devices 405 to the device under test 403;

Step 2: After streaming for a period of time, operate the streaming tool 404 to stop streaming, and operate the packet capture tool 402 to stop capturing packets, and screen and count the number of data bytes received by the device under test 403 from all the captured data packets. Denote B as the number of bytes actually received by port 1 of the device under test;

Step 3: Delay the data update cycle of the network management node from the time when the packet capture is stopped (in order to count the data packets that flow), and read the word received by the network management node "Port 1 of the device under test" through the network management system simulator 401. The value of "number of sections" is denoted as C;

Step 4: “Number of bytes received by port 1 of the device under test” of the network management node during streaming is D=C-A, and D is the number of bytes received by port 1 of the device under test according to the statistics of the network management system;

Step 5: Compare whether B is equal to D.

As shown in Figure 6, the data packets received by port 1 of the device under test include: streaming data packets and management control protocol packets. In Figure 6, the black area is the streaming data packet received by port 1, and the gray area is Management control protocol packets received by port 1. The streaming data stream can be generated and terminated under the control of the streaming tool. After the streaming is terminated, the port 1 of the device under test will no longer receive the streaming data packets. The management control protocol packet is a packet of network management and control protocol interaction to ensure the normal operation of the network. It exists in the network all the time and is not under the control of the tester. The statistical value of the network management node is updated at intervals of period T: at the update point, the network management node performs statistics and calculations according to the incentives received before the time point to obtain the node's assignment; The "number of bytes of data received by port 1 of the device under test" read by the network management is the value of the previous update.

The network management node reading D is the statistics of the number of bytes received by the device under test in the three T time periods. Therefore, in order to test whether the statistics of the network management node D are correct, D should be compared with E instead of D and packet capture. Compared with the number of bytes B taken, B misses a part of the management and control protocol packets, so there is a test error in the traditional test scheme.

It can be inferred that if the first reading of the network management node data, the start of packet capture and the update of the network management node data occur at the same time, and the packet capture stops, the second reading of the network management node data and the update of the network management node data occur at the same time. were released at the same time, and the test error was zero. However, this kind of synchronization cannot be realized in the actual test operation, so the time out of synchronization between the test operation and the data update of the network management node leads to the existence of test errors.

In the actual test, the data of the network management node is read for the first time, the packet capture is started, and the relative position of the network management node data and the data update of the network management node in time cannot be controlled. The relative position of data and network management node data update in time cannot be controlled. Therefore, the test error is different for each test, and the test error is not constant, depending on the timing of the start and end of packet capture, and the test error fluctuates greatly, which brings difficulties to the evaluation of the device under test.

In addition, the traditional test method requires "reading the network management node data" and "starting streaming and capturing packets" immediately. The smaller the time difference between the two actions, the better. The test operation is not easy to control, and the operation process is relatively complicated. It can be seen that in the traditional test method, because the test operations (starting to capture packets, stop capturing packets, and reading network management node data) cannot be synchronized with the data update of the network management node, the management and control packets are not counted, resulting in measurement errors.

Considering that the rate of streaming data packets and management and control packets is basically constant, under the premise of continuous streaming, the number or words of data packets captured in any time period equal to the data update period T of the network management node. Sections are equal. Therefore, the statistical value of the number of bytes received by port 1 of the device under test and the “number of bytes received by port 1 of the device under test” of the network management node within any time period of T (or within a time period of an integer multiple of T) is used to carry out By comparison, accurate testing of the network management node can be achieved.

The present invention will be described in detail below with reference to specific application scenarios.

The method of the scene of the present invention does not require the test operation (the start of packet capture, the end of the packet capture) to be synchronized with the data update time of the network management node.

Step 1: Use the streaming tool to establish a data flow between other network devices via the switch and the device under test;

Step 2: After the streaming rate is constant, randomly read the "Number of bytes received by port 1 of the tested device" from the network management node and the statistical value is A, and wait for a period of T1 (T1 is an integer multiple of T) to read another value, denoted as A1, calculate E=A1-A; E is the number of bytes received by port 1 of the device under test according to the statistics of the network management system;

Step 3: Use a packet capture tool to capture data packets (including streaming data packets and management control protocol packets) in any T1 time period, and count the total number of bytes received by port 1 under test as B, And take B as the number of bytes actually received by port 1 of the device under test;

Step 4: Compare E with B.

In the test method of the embodiment of the present invention, since the rate of the streaming data message and the rate of the management control protocol message are basically constant, the number of bytes received by the network management node "the number of bytes received by the port of the device under test" should be counted within T time. The number of bytes E is almost equal to the number of bytes B captured by the packet capture tool within T time. As shown in Figure 7, the black area in Figure 7 is the streaming data packet received by port 1, and the gray area is the data packet received by port 1. For management control protocol packets, the packet capture duration is taken as an example of a network management data update period T, so the test error is close to zero, which is greatly reduced compared to the traditional test method.

The test error in the embodiment of the present invention is only related to the slight fluctuation of the rate of the streaming data packet and the rate of the management control packet, and is related to the test operation (reading the data of the network management node, starting to capture packets, stopping the packet capture) and the update of the data of the network management node. The relative time of moments is irrelevant. Therefore, each test error is basically constant.

In addition, the network management node data reading and packet capture are operated independently, and synchronization is not required in time. The test process is relatively simple, which is convenient for precise control and easy execution.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the invention may take the form of a hardware embodiment, a software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media having computer-usable program code embodied therein, including but not limited to disk storage, optical storage, and the like.

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

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory result in an article of manufacture comprising instruction means, the instructions The apparatus implements the functions specified in the flow or flow of the flowcharts and/or the block or blocks of the block diagrams.

These computer program instructions can also be loaded on a computer or other programmable data processing device to cause a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process such that The instructions provide steps for implementing the functions specified in the flow or blocks of the flowcharts and/or the block or blocks of the block diagrams.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention.

Claims (10)

1. A network management node statistical test method is characterized in that the method comprises the following steps:

reading a first statistical value of the network management node at a first moment, and reading a second statistical value of the network management node at a second moment, wherein the first moment and the second moment are two moments with constant flow rate, the time difference between the second moment and the first moment is an integral multiple of the data updating period of the network management node, and the first statistical value and the second statistical value are numerical values of network management statistics;

counting actual values corresponding to the network management nodes in a time period from a third moment to a fourth moment by using a packet capturing tool, wherein the third moment and the fourth moment are two moments with constant speed, and the time difference between the fourth moment and the third moment is equal to the time difference between the second moment and the first moment;

and comparing the actual value corresponding to the network management node with the difference value between the first statistical value and the second statistical value of the network management statistics.

2. The method of claim 1, wherein the first time and the third time are different times, and wherein the second time and the fourth time are different times.

3. The method of claim 1, wherein the first time and the third time are the same time, and wherein the second time and the fourth time are the same time.

4. The method of claim 1, further comprising:

starting to execute the streaming operation before starting to read the statistics value of the network management node and starting to capture the packet, and ending the streaming operation after finishing reading the statistics value of the network management node or finishing capturing the packet;

and the streaming operation is used for establishing data flow between the tested network equipment corresponding to the network management node and other network equipment through the switch.

5. The method according to claim 1, wherein the counting actual values corresponding to the network management node from the third time to the fourth time by using the packet capturing tool comprises:

capturing all data messages in a time period from the third time to the fourth time, and screening out the data messages of the network management nodes to be counted from all the captured data messages according to a preset identifier, wherein the preset identifier is used for distinguishing the data messages of the network management nodes to be counted from other data messages; and calculating an actual value corresponding to the network management node statistical value according to the screened data message.

6. The method according to claim 5, wherein the data message of the network management node to be counted comprises: streamed data messages and supervisory control protocol messages.

7. A network management node statistical test system is characterized in that the system comprises: the device comprises a reading unit, a capturing statistical unit and a comparison unit; wherein,

the reading unit is configured to read a first statistical value of the network management node at a first time, and read a second statistical value of the network management node at a second time, where the first time and the second time are two times with constant throttling rate, a time difference between the second time and the first time is an integral multiple of a data update period of the network management node, and the first statistical value and the second statistical value are network management statistical values;

the capturing and counting unit is used for counting the actual value corresponding to the network management node in a time period from a third moment to a fourth moment by using a packet capturing tool, wherein the third moment and the fourth moment are two moments with constant speed of the throttle, and the time difference between the fourth moment and the third moment is equal to the time difference between the second moment and the first moment;

the comparing unit is configured to compare an actual value corresponding to the network management node with a difference between the first statistical value and the second statistical value of the network management statistics.

8. The system of claim 7, wherein the first time and the third time are different times and the second time and the fourth time are different times.

9. The system of claim 7, wherein the first time and the third time are the same time, and wherein the second time and the fourth time are the same time.

10. The system of claim 7, further comprising: the system comprises a streaming unit, a packet capturing unit and a processing unit, wherein the streaming unit is used for starting to execute streaming operation before starting to read the statistics value of the network management node and starting to capture the packet, and ending the streaming operation after ending to read the statistics value of the network management node or ending to capture the packet;

and the streaming operation is used for establishing data flow between the tested network equipment corresponding to the network management node and other network equipment through the switch.