CN117675627A

CN117675627A - Port cache value testing method and device, electronic equipment and readable storage medium

Info

Publication number: CN117675627A
Application number: CN202211067809.7A
Authority: CN
Inventors: 黄贵斌
Original assignee: Maipu Communication Technology Co Ltd
Current assignee: Maipu Communication Technology Co Ltd
Priority date: 2022-09-01
Filing date: 2022-09-01
Publication date: 2024-03-08

Abstract

The embodiment of the invention provides a method and a device for testing a port cache value, electronic equipment and a readable storage medium. And firstly, sending a flow control frame to the network equipment according to a preset linear speed, and then continuously sending the data message to the network equipment within the data message sending time so as to enable the data message to be stored in a port cache region of the network equipment. And then stopping the sending of the data message and the flow control frame in sequence so as to receive the cache data message in the port cache area sent by the network equipment. And finally, determining the port cache value of the network equipment according to the cache data message. Therefore, the network equipment stops data transmission by firstly transmitting the flow control frame according to the preset linear speed, so that the network equipment stores the data message in the port cache area, receives the returned cache data message after the transmission of the flow control frame is stopped, and finally can determine the port cache value according to the cache data message, thereby ensuring that the port cache value of the network equipment is accurate.

Description

Port cache value testing method and device, electronic equipment and readable storage medium

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for testing a port cache value, an electronic device, and a readable storage medium.

Background

With the rapid development of network communication technology, networking is currently advancing toward data center networks, so that the performance requirements of network equipment such as switches are also gradually increasing. The port buffer area is used as a buffer area for data messages in the exchange process, and the size of the port buffer determines the performance strength of the equipment to a certain extent. A theoretical port cache value exists in a switch chip of the switch, but the actual port cache value of the switch is often different from the theoretical port cache value, and capacity test is required.

In the prior art, a mode of testing the buffer size of a port is to send a data message to a switch by using one port of a tester to occupy the outlet bandwidth of the switch, and send the data message to the switch by using the other port of the tester to store the data message in the port buffer of the switch. When the data message occupying the egress bandwidth is not transmitted, the data message stored in the port buffer memory is returned to the tester from the exit of the switch. The tester can obtain the total number of messages stored in the port cache by subtracting the total number of messages occupying the outlet bandwidth from the total number of messages returned by the switch, and then calculate the port cache size by using the calculated total number of messages stored in the port cache and the calculated message size.

However, due to the switching chip itself of the switch, the ports of the switch may exhibit a phenomenon of ultra-bandwidth forwarding to some extent. When the data message sent by one port of the tester occupies the outlet bandwidth of the switch: in addition to storing the data message sent by another port of the tester in the port buffer, a very small part of the data message can be returned to the tester through the outlet of the switch. Therefore, the number of the messages cached by the calculated switch is high, so that the port cache size of the calculated switch is high, and the result is inaccurate.

Disclosure of Invention

The invention aims to provide a method and a device for testing a port cache value, electronic equipment and a readable storage medium, so as to solve the problems in the prior art.

Embodiments of the invention may be implemented as follows:

in a first aspect, the present invention provides a method for testing a port cache value, including:

transmitting a flow control frame to network equipment according to a preset linear speed, wherein the flow control frame carries a time parameter, and the time parameter is used for indicating the stopping time of stopping data transmission of the network equipment; the predetermined line speed corresponds to a data transmission rate of the network device;

Continuously sending data messages to the network equipment within the data message sending time so that the data messages are stored in a port cache area of the network equipment;

stopping sending the flow control frame after the data message stops sending;

receiving a cache data message in the port cache area sent by the network equipment;

and determining a port cache value of the network equipment according to the cache data message.

In an alternative embodiment, the network device has a first port and a second port, the time parameter is used to instruct the first port to stop data transmission at a stop time, and the predetermined line speed corresponds to a data transmission rate of the first port;

the step of sending a flow control frame to the network device according to a predetermined linear speed includes:

transmitting the flow control frame to a first port of the network device according to the preset linear speed;

the step of continuously sending the data message to the network equipment comprises the following steps:

continuously sending a data message to the second port; the data transmission rate of the first port is greater than or equal to the data transmission rate of the second port;

The step of receiving the buffer data message in the port buffer area sent by the network device includes: and receiving the cache data message sent by the network equipment through the first port.

In an alternative embodiment, the method is applied to a test device having a third port and a fourth port;

transmitting a flow control frame to the network equipment through the third port according to a preset linear speed;

continuously sending a data message to the network equipment through the fourth port;

the step of receiving the buffer data message in the port buffer area sent by the network device includes:

and receiving the cache data message sent by the network equipment through the third port.

In an alternative embodiment, before the step of transmitting the flow control frame to the first port of the network device at the predetermined line speed, the method further includes:

and setting the preset line speed to be equal to the data transmission rate of the third port.

In an optional embodiment, before the step of determining the port buffer value of the network device according to the received data packet in the port buffer area, the method further includes:

judging whether the total number of the transmitted data messages is larger than the total number of the cached data messages;

if yes, the step of determining the port cache value of the network device includes:

determining the port cache value according to the total number of the cache data messages;

and if not, prolonging the data message sending time, and returning to execute the step of sending the flow control frame to the network equipment according to the preset linear speed based on the prolonged data message sending time.

In a second aspect, the present invention provides a method for testing a port cache value, including:

receiving a flow control frame sent by test equipment according to a preset linear speed, wherein the flow control frame carries a time parameter, and the time parameter is used for indicating the stop time of stopping data sending of network equipment; the predetermined line speed corresponds to a data transmission rate of the network device;

receiving the data message continuously transmitted by the test equipment in the data message transmitting time length, and storing the data message into a port cache region;

And after the stop time is over, sending all the cache data messages in the port cache region to the test equipment so that the test equipment determines the port cache value of the network equipment according to the cache data messages.

In an alternative embodiment, the method is applied to the network device, the network device has a first port and a second port, the time parameter is used for indicating a stop time for stopping data transmission of the first port, and the predetermined line speed corresponds to a data transmission rate of the first port;

the step of receiving the flow control frame sent by the test equipment according to the preset linear speed comprises the following steps:

receiving a flow control frame sent by the test equipment according to a preset linear speed through the first port;

the step of receiving the data message continuously sent by the test equipment and storing the data message in a port cache area comprises the following steps:

receiving a data message continuously sent by the test equipment through the second port, and storing the data message into the port cache region;

when the port cache area is full, discarding the newly-entered data message at the second port;

The step of sending all the buffer data messages in the port buffer area to the test equipment comprises the following steps:

and sending the cache data message to the test equipment through the first port.

In an alternative embodiment, the test device has a third port and a fourth port;

receiving a flow control frame sent by the test equipment through the third port according to the preset linear speed;

receiving a data message continuously sent by the test equipment through the fourth port, and storing the data message into the port cache region;

when the port cache area is full, discarding the newly-entered data message;

and sending the cache data message to the third port.

In a third aspect, the present invention provides a device for testing a port cache value, including:

The flow control frame sending module is used for sending a flow control frame to the network equipment according to a preset linear speed, wherein the flow control frame carries a time parameter, and the time parameter is used for indicating the stopping time of stopping data sending of the network equipment; the predetermined line speed corresponds to a data transmission rate of the network device;

the message sending module is used for continuously sending the data message to the network equipment within the sending time of the data message so as to enable the data message to be stored in a port cache area of the network equipment;

the data processing module is used for stopping sending the flow control frame after the data message is stopped sending;

a buffer message receiving module, configured to receive a buffer data message in the port buffer area sent by the network device;

the data processing module is further configured to determine a port cache value of the network device according to the cache data packet.

In a fourth aspect, the present invention provides a device for testing a port cache value, where the device includes:

the flow control frame receiving module is used for receiving a flow control frame sent by the testing equipment according to a preset linear speed, wherein the flow control frame carries a time parameter, and the time parameter is used for indicating the stop time of stopping data sending of the network equipment; the predetermined line speed corresponds to a data transmission rate of the network device;

The message receiving module is used for receiving the data message continuously sent by the test equipment in the data message sending time length and storing the data message into a port cache area;

and the buffer message sending module is used for sending all the buffer data messages in the port buffer area to the test equipment after the stop time is over, so that the test equipment determines the port buffer value of the network equipment according to the buffer data messages.

In a fifth aspect, the present invention provides an electronic device, comprising: a memory and a processor, the memory storing a computer program executable by the processor, the processor executing the computer program when the electronic device is running to implement the method of any one of the preceding embodiments or the method of any one of the preceding embodiments.

In a sixth aspect, the present invention provides a computer readable storage medium storing a computer program for execution by a processor to implement the method of any one of the preceding embodiments or the method of any one of the preceding embodiments.

Compared with the prior art, the embodiment of the invention provides a method, a device, electronic equipment and a readable storage medium for testing a port cache value, which enable network equipment to stop data transmission within stop time by firstly transmitting a flow control frame according to a preset linear speed, and then continuously transmitting a data message to the network equipment. Because the network device receives the flow control frame all the time, the network device cannot forward the data message, and only can store the data message in the port buffer area. After the data message stops being sent, the flow control frame can be stopped being sent. And then the network equipment returns the cache data message of the port cache region, and finally the port cache value can be determined according to the cache data message, so that the finally obtained port cache value of the network equipment is ensured to be accurate.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of a scenario of a switch cache test in the prior art.

Fig. 2 is a schematic diagram of an application scenario provided in an embodiment of the present invention.

Fig. 3 is a flow chart of a method for testing a port cache value according to an embodiment of the present invention.

Fig. 4 is a timing chart of data transmission according to an embodiment of the present invention.

Fig. 5 is a second flowchart of a method for testing a port cache value according to an embodiment of the present invention.

Fig. 6 is a second schematic diagram of an application scenario provided in an embodiment of the present invention.

Fig. 7 is a third schematic diagram of an application scenario provided in an embodiment of the present invention.

Fig. 8 is a third flowchart of a method for testing a port cache value according to an embodiment of the present invention.

Fig. 9 is a schematic structural diagram of a testing device for port cache values according to an embodiment of the present invention.

Fig. 10 is a second schematic structural diagram of a testing device for port cache value according to an embodiment of the present invention.

Fig. 11 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

Furthermore, the terms "first," "second," "third," "fourth," and the like, if any, are used solely for distinguishing between descriptions and not necessarily for indicating or implying a relative importance.

It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.

Referring to fig. 1, fig. 1 is a schematic diagram of a scenario of a switch cache test in the prior art.

In the prior art, a tester is used for testing port cache of the switch, and three ports A, B, C of the tester are respectively connected with three ports 1, 3 and 2 of the switch. The test procedure was as follows:

(1) Firstly, the tester continuously transmits a data message (for example, continuously transmits for 30 seconds) to a port 3 of the switch at a linear speed of 100% through a port B, the outlet bandwidth of a port 1 of the switch is full, and the data message transmitted by the port B continuously returns to a port A of the tester through the port 1;

(2) Meanwhile, in the period of 30s, the tester continuously sends data messages (for example, continuously sends 10 s) to the port 2 of the switch through the port C, and the output bandwidth of the port 1 of the switch is occupied by the data sent by the port B of the tester, so that the messages sent by the port C can be stored in a cache of the switch to wait for forwarding;

(3) After the port C, B of the tester stops sending successively, the data message in the cache of the switch is sent to the port A of the tester through the port 1;

(4) And finally, subtracting the number of the data messages sent by the port B from the number of the data messages received by the port A by the tester to obtain the number of the data messages cached by the switch, and further calculating the size of the port cache of the switch.

As mentioned in the background art, in the prior art, due to the switching chip of the switch, the port of the switch may have a phenomenon of ultra-bandwidth forwarding to some extent. Namely, within the period of time of the data packet sent by the port B: the data message sent by the port B to the port 3 occupies the outlet bandwidth of the port 1, the data message sent by the port C to the port 2 is not completely stored in the buffer memory, and a very small part of the data message sent by the port C still does not enter the buffer memory, but can be directly returned to the port a through the port 1.

In this way, in the period of time when the port B sends the data message, the data message directly sent out through the port 1 after the port C is sent to the port 2 is also regarded as the message stored in the buffer memory, so that the number of the data messages buffered by the calculated switch is larger than the number of the actual messages stored by the actual switch, and finally, the calculated switch has higher port buffer memory size and inaccurate result.

In the prior art, three ports are needed for the tester and the switch, but in the current application scenario of the data center, the ports of the switch of the data center are mostly high-rate ports, for example: 40G, 100G and even 400G, the corresponding high-rate testers are expensive and contain a limited number of ports. For example, a tester including 400G high-speed test ports, which is currently proposed by a tester manufacturer, has only two test ports on one board card, and the tester cannot test the port buffer size of the 400G switch by using the prior art. That is, the prior art method is not universal yet and cannot be applied to a part of the high-rate port tester.

Based on the findings of the above technical problems, the inventors have made creative efforts to propose the following technical solutions to solve or improve the above problems. It should be noted that the above prior art solutions have all the drawbacks that the inventors have obtained after practice and careful study, and thus the discovery process of the above problems and the solutions to the problems that the embodiments of the present application hereinafter propose should not be construed as what the inventors have made in the invention creation process to the present application, but should not be construed as what is known to those skilled in the art.

The inventor discovers through long-term observation that the port of the switch can have the phenomenon of ultra-bandwidth forwarding to a certain extent, so that when the message sent by one port of the tester in the prior art occupies the outlet bandwidth of the switch, the switch can still forward the message sent by the other port of the tester from the outlet in an ultra-bandwidth manner. In other words, as long as the exit port of the switch is congested or the forwarding is stopped, the data cannot be forwarded, the subsequent data messages can be guaranteed to be stored in the cache of the switch, and when the exit port of the switch is unobstructed, the data in the cache of the switch returns to the tester, so that the cache size of the switch can be accurately calculated.

IEEE 802.3x is a flow control method of a full duplex ethernet data link layer. The principle of realizing flow control is as follows: when the port of the receiving party is blocked, in order to avoid the situation of frame loss, the receiving party can send a flow control frame (PAUSE frame) to the sending party, so that the sending party PAUSEs data sending, the data flow between the sending party and the receiving party can be controlled, and the data packet loss can be prevented. The PAUSE frame comprises a destination MAC address, a type field identifier, an operation code, an operation parameter and other fields, and the destination MAC address is fixed as a multicast address: 01-80-C2-00-00-01; a type field identifier of 0x8808 represents the protocol type of the frame; the opcode field is two bytes 0x0001; the operation parameter field is 2 bytes, and can be used to indicate the time when the receiver stops forwarding, where the unit is the time when the receiver transmits 512 bits of data at its current transmission rate, and the value range of the operation parameter is 0-65535, for example: assuming that the time for the receiver to transmit 512 bits of data at its current transmission rate is t, if the operation parameter is 65535, the time for the receiver to stop transmitting data is 65535×t.

Therefore, referring to fig. 2, fig. 2 is a schematic diagram of an application scenario provided by an embodiment of the present invention, the inventor thinks that using ieee802.3x flow control technology, a PAUSE frame is sent to a data outlet of a network device 10 by a test device 20, and data forwarding of the network device 10 is inhibited by the PAUSE frame, so that data received by the network device 10 is not forwarded through the data outlet thereof in a time corresponding to an operation parameter of the PAUSE frame.

The network device 10 may be a common switch, a data center switch, a router, etc., and the test device 20 may be a dedicated test device or tester corresponding to different types of network devices 10.

Therefore, the embodiment of the invention provides a method for testing a port cache value, which can send a flow control frame to network equipment according to a preset line speed to control the network equipment to stop data forwarding so as to ensure that data messages which are subsequently sent to the network equipment can be completely stored in a port cache region. When the data message is stopped from being sent, the flow control frame is stopped from being sent, the buffer data message of the port buffer area returned by the network equipment can be received, and finally the port buffer value of the port buffer area can be calculated according to the buffer data message, so that the capacity of the port buffer area can be accurately and time-saving verified. The following detailed description is made by way of example with reference to the accompanying drawings.

Referring to fig. 3, fig. 3 is a flowchart of a method for testing a port cache value according to an embodiment of the present invention, including the following steps:

s110, sending a flow control frame to the network equipment according to the preset linear speed.

In this embodiment, the flow control frame carries a time parameter, which may be the above-mentioned operation parameter, where the time parameter is used to instruct the network device to stop sending data, and the predetermined line speed may correspond to the data sending rate of the network device.

The flow control frame can be sent in the sending duration of the flow control frame, and the network equipment stops data forwarding in the stopping time corresponding to the flow control frame when receiving one flow control frame, so that the network equipment continuously receives the flow control frame in the sending duration of the flow control frame and stops data forwarding in a plurality of continuous stopping times.

And S120, continuously sending the data message to the network equipment within the sending time of the data message so as to enable the data message to be stored in a port cache region of the network equipment.

The port buffer area is a buffer area, the message can be stored in the buffer area to be forwarded, and the actual port buffer values of different network devices can be different. When the network device receives the data message, the data message is stored in a port cache area of the network device.

In order to illustrate a timing sequence relationship between the transmission of the flow control frame and the data packet, please refer to fig. 4, fig. 4 is a timing sequence diagram of the data transmission provided by the embodiment of the present invention, the flow control frame may be transmitted to the network device according to a predetermined line speed within a transmission duration T1 of the flow control frame, and the data packet is continuously transmitted to the network device within a transmission duration T2 of the data packet.

The beginning time T1 of the flow control frame sending time T1 is smaller than the beginning time T2 of the data message sending time T2, and the ending time T4 of the flow control frame sending time T1 is larger than the ending time T3 of the data message sending time T2, namely T1< T2 and T4> T3.

S130, after the data message stops being sent, the flow control frame stops being sent.

And S140, receiving the cache data message in the port cache area sent by the network equipment.

After the data packet stops being sent, the flow control frame may be stopped being sent, so that the network device returns a buffered data packet in the port buffer, where the buffered data packet may represent the data packet stored in the port buffer.

With reference to fig. 4, at the end time T3 of the data packet transmission duration T2, the transmission of the data packet may be stopped; at the end time T4 of the flow control frame transmission duration T1, the transmission of the flow control frame may be stopped. The network device may then return the buffered data packets from the port buffers.

S170, determining a port cache value of the network equipment according to the cache data message.

After receiving all the buffered data messages of the port buffer, the port buffer value of the port buffer of the network device can be calculated according to all the buffered data messages returned by the network device.

The embodiment of the invention provides a method for testing a port cache value, which can send a flow control frame to network equipment according to a preset linear speed to control the network equipment to stop data forwarding, and continuously send a data message to the network equipment within the sending time of the data message while sending the flow control frame, and the network equipment stores the received data message in a port cache region. After stopping sending the data message, stopping sending the flow control frame, receiving the buffered data message of the port buffer area returned by the network device, and finally calculating the port buffer value of the port buffer area according to the buffered data message, so that the capacity of the port buffer area can be accurately and time-saving verified.

Optionally, the method may be applied to a test device, where the time parameter of the flow control frame has a value of 0-65535, so that in order to ensure that the time for the network device to stop sending data is continuous, the time parameter may directly take 65535, and the size of the data packet may also be set randomly.

The test device may generate a flow control frame first, then send the flow control frame to the network device according to a predetermined line speed, then the test device may generate a data message with a fixed size, and then continuously send the generated data message to the network device within a data message sending duration.

The frame head and the frame tail of the data message occupy 20 bytes in total, and the ratio of the frame head and the frame tail of the data message with different sizes is different. It can be understood that there may be a phenomenon that the port cache values finally calculated by the data packets with different sizes may be different, so that the data packets with the sizes of 64 bytes, 128 bytes, 256 bytes, 512 bytes, 1024 bytes, 1518 bytes, 9216 bytes and the like may be sequentially generated, and after multiple times of verification are sequentially performed, the maximum value of the port cache values with different sizes may be used as an actual port cache value of the network device.

In one possible implementation, it is necessary to ensure that the port buffer of the network device is filled with data packets, and the port buffer value calculated by the subsequent test device is accurate. Accordingly, referring to fig. 5, the method may further include S150 and S160 before the step S170, on the basis of fig. 3:

S150, judging whether the total number of the transmitted data messages is larger than the total number of the cached data messages.

In this embodiment, after stopping the flow control frame transmission, the network device returns all the buffered data packets in the port buffer. When the situation of packet loss of transmission between the test equipment and the network equipment is not considered, assuming that the total number of the transmitted data messages is x and the total number of the cached data messages is y, two situations exist in comparison of the sizes of x and y:

the first is x=y, if all the data messages transmitted are not stored in the port buffer area or just stored in the port buffer area within the data message transmission time length, the total number of the transmitted data messages is larger than the total number of the stored data messages;

and the second is that x > y, if the network equipment discards the subsequently received data messages after all the transmitted data messages are stored in the port buffer area within the data message transmission time, the total number of the transmitted data messages is larger than the total number of the buffered data messages.

Because the test equipment is not sensitive to whether the port buffer area of the network equipment is full or just full, for the test equipment, the transmitted data messages can be determined to be full in the data message transmission duration only when the total number of the transmitted data messages is judged to be larger than the total number of the received cache data messages.

If the total number of the data messages sent is equal to the total number of the data messages cached, step S160 is executed, and based on the data message sending duration after the extension in step S160, the above step S110 is executed again.

S160, prolonging the sending time of the data message.

If the total number of the data packets sent is greater than the total number of the buffered data packets, step S171 is performed. Correspondingly, the process of determining the port cache value of the network device in the step S170 may include the sub-steps of:

s171, determining the port cache value according to the total number of the cache data messages and the size of the data messages.

It should be noted that, in connection with fig. 4, the values of T1 and T2 at the beginning of the method execution may be set according to their initial values, or may be set by the user on the test device. After the data message sending duration T2 is prolonged, it is also required to ensure that T1< T2 and T4> T3, that is, whether T1 is prolonged after T2 is prolonged is judged according to the sizes of actual T1 and T2 so as to ensure that T1< T2 and T4> T3.

In a possible case, the test device is a network tester, and all of the steps S110 to S170 may be performed by the network tester.

In another possible case, the test device includes a network tester and a background processing device which are connected in communication, for example, a personal computer, where the network tester is connected to the network device to be tested, the steps S110 to S140 and S170 may be performed by the network tester, and the steps S150 and S160 may be performed by the personal computer.

After the network tester finishes executing the step S140, the personal computer may read the total number x of the data messages transmitted and the total number y of the buffered data messages from the network tester, or the network tester transmits the total number x of the data messages and the total number y of the buffered data messages to the personal computer. Then the personal computer judges the size relation between x and y: if x > y, the personal computer informs the network tester to normally execute step S170; if x=y, the pc increases T2, and at the same time, the actual situation determines whether to increase T2, and then sends the increased T1 and T2 to the network tester, so that the network tester resumes executing S110-S140, and the network tester can execute step S170 to obtain the port cache value until x > y.

In a possible implementation, referring to fig. 6, the network device may have a first port and a second port, and the time parameter may be used to indicate a stop time for the first port to stop data transmission, and the predetermined line speed may correspond to a data transmission rate of the first port. In a possible case, the test device may be connected to only one network device, and test the port cache value of the network device; the test device may also be connected to multiple network devices, respectively, while testing the port cache values of these network devices, and different network devices may use their device IDs as unique identifiers.

For at least one network device to which the test device is connected, a first port of the network device may be connected to one port of the test device and a second port of the network device may be connected to another port of the test device. The process of determining the port cache value for the network device may be as follows.

Optionally, the substeps of step S110 may include:

and S111, sending a flow control frame to a first port of the network equipment according to the preset linear speed.

Optionally, the substeps of step S120 may include:

s121, continuously sending the data message to the second port within the data message sending duration.

The data sending rate is the port rate of the port. The data transmission rate of the first port is greater than or equal to the data transmission rate of the second port.

Optionally, the substep of step S140 may include:

s141, receiving a cache data message sent by the network equipment through the first port.

It should be noted that, the configuration of the network device may be performed at the beginning, and the first port and the second port of the network device need to be added to the same VLAN (virtual local area network) in a tag (untag) manner at the configuration interface of the test device or the interface of the personal computer included in the test device.

In VLAN, tag (label) refers to a label of VLAN, i.e. an ID of VLAN, when a packet is a tag packet, the tag is used to indicate the VLAN to which the packet belongs, and when the packet is a unit packet, it represents that the packet does not belong to any VLAN, and there is no VLAN tag.

In one possible implementation, referring to fig. 7, the network device may have a first port and a second port, and the test device may have a third port and a fourth port, where the first port may be connected to the third port and the second port may be connected to the fourth port. The data transmission rates of the first port and the third port are the same, and the data transmission rates of the second port and the fourth port are the same.

Optionally, the substeps of step S110 may include:

and S11a, sending a flow control frame to the network equipment through the third port according to the preset linear speed.

The test device may send a flow control frame to the first port of the network device through the third port at a predetermined linear speed.

Optionally, the substeps of step S120 may include: and S12a, continuously transmitting the data message to the network equipment through the fourth port within the data message transmission time.

And in the data message sending time, the test equipment can continuously send the data message to the second port of the network equipment through the fourth port. In a possible example, the test device may send the data packet at a 100% line speed, where the 100% line speed represents that the line speed at which the test device sends the data packet is consistent with the data sending rates of the second port and the fourth port, so that the test may be completed as quickly as possible.

Optionally, the substep of step S140 may include:

s14a, receiving a buffer data message sent by the network equipment through a third port. The test device may receive, through the third port, a buffered data packet returned by the first port of the network device.

Optionally, before the step S110, the method may further include the step of:

s100, setting a preset line speed equal to the data transmission rate of the third port.

When the predetermined line speed is set to the data transmission rate of the third port, that is, the test device transmits the flow control frame to the network device according to the line speed of 100%. And sending the flow control frame according to the line speed of 100%, so that the outlet of the data message, namely the first port, is always in a data forwarding stopping state, the data message received by the network equipment can only be stored in the port cache until the stopping time of the flow control frame is over, and the network equipment can only forward the cached data message in the port cache from the first port back to the test equipment.

The embodiment of the method for introducing port cache values is mainly based on test equipment, and describes a process for testing port cache values of network equipment by using the test equipment.

In view of the foregoing, a description will be given below of a process of testing a port cache value of a network device by using a test device, taking the network device as an execution subject. It should be noted that, the basic principle and the technical effects thereof are the same as or similar to those of the foregoing embodiments, and for brevity, reference may be made to the corresponding contents of the foregoing embodiments for the parts not mentioned in this embodiment. Referring to fig. 8, fig. 8 is a flowchart of a method for testing a port cache value according to an embodiment of the present invention, the method includes the following steps:

S210, receiving a flow control frame sent by the test equipment according to a preset linear speed.

The flow control frame carries a time parameter, and the time parameter is used for indicating the stopping time of stopping data transmission of the network equipment. The predetermined line speed corresponds to a data transmission rate of the network device. The network device may calculate a stop time to stop data transmission based on the time parameter in the flow control frame.

And S220, in the data message sending time, receiving the data message continuously sent by the test equipment, and storing the data message into the port cache area.

And S230, after the stop time is over, sending all the cache data messages in the port cache region to the test equipment so that the test equipment can determine the port cache value of the network equipment according to the cache data messages.

The embodiment of the invention provides a method for testing a port cache value, which comprises the steps that after receiving a flow control frame sent by test equipment according to a preset linear speed, network equipment stops data forwarding in a stop time corresponding to the flow control frame. And then, in the data message sending time, receiving the data message continuously sent by the test equipment, and storing the data message into the port cache area. And finally, after the stop time is over, sending all the buffer data messages in the port buffer area to the test equipment, so that the test equipment determines the port buffer value of the network equipment according to the buffer data messages, and the capacity of the port buffer area can be accurately and time-saving verified.

In one possible implementation, in connection with fig. 6, since the test device may be at least one network device, for any one of the network devices: the network device may have a first port connected to one port of the test device and a second port connected to the other port of the test device. The time parameter may be used to indicate a stop time for the first port to stop data transmission, and the predetermined line speed may correspond to a data transmission rate of the first port.

Accordingly, the sub-steps of step S210 may include:

s211, receiving a flow control frame sent by the test equipment according to a preset linear speed through a first port.

Accordingly, the sub-steps of step S220 may include:

s221, in the data message sending time, the data message continuously sent by the test equipment is received through the second port, the data message is stored in the port cache area, and when the port cache area is full, the newly-entered data message is discarded at the second port.

Accordingly, the process of sending all the buffered data packets in the port buffer to the test device in step S230 may include:

s231, the buffer data message is sent to the test equipment through the first port.

Accordingly, the sub-steps of step S210 may include:

s21a, receiving a flow control frame sent by the test equipment through the third port according to the preset linear speed.

The network device may receive, via the first port, flow control frames sent by the test device via the third port at a predetermined line speed.

Accordingly, the sub-steps of step S220 may include:

s22a, in the data message sending time, receiving the data message continuously sent by the test equipment through the fourth port, storing the data message in the port cache area, and discarding the newly-entered data message when the port cache area is full.

The network device can receive the data message continuously sent by the test device through the fourth port through the second port, store the data message into the port buffer until the buffer is full, and discard the subsequently received data message directly.

s23a, sending the buffer data message to the third port.

The network device may send the buffered data packet of the port buffer to the third port of the test device through the first port.

It should be noted that, in the above method embodiment, the execution sequence of each step is not limited by the drawing, and the execution sequence of each step is based on the actual application situation.

Compared with the prior art, the embodiment of the invention has the following beneficial effects:

(1) In the scheme, the test equipment sends the flow control frame to the first port (namely the data message outlet) of the network equipment according to the preset linear speed in the flow control frame sending time, so that the first port completely stops forwarding the data message, and simultaneously continuously sends the data message to the second port of the network equipment in the data message sending time so as to enable the data message to be stored in the port buffer area of the network equipment. After stopping sending the flow control frame, the network device can return the buffer data message of the port buffer area from the first port to the test device, so that the total number of the buffer messages received by the test device is ensured to be consistent with the data message actually stored in the port buffer area, and the accuracy of the port buffer value finally calculated is ensured.

(2) The network device sends the flow control frame according to the 100% line speed (namely the data sending rate of the third port), so that the data message outlet, namely the first port, can be guaranteed to be always in a data forwarding stopping state to the greatest extent, the data message received by the network device can only be stored in the port cache until the stopping time of the flow control frame is over, and the network device can only send the cache data message of the port cache back to the test device from the first port. The network device sends the data message according to the 100% line speed (the data sending rate of the fourth port), so that the data message can be fully stored in the data buffer area within the shortest data message sending duration, and the whole test flow can be completed as soon as possible.

(3) In the scheme, the test can be completed by only using two ports of the test equipment to butt joint two ports of the network equipment, and the method is more suitable for the test equipment of the data center switch for testing the current high-rate port.

(4) By combining with the IEEE802.3x flow control technology, the flow control frame with the time parameter of 65535 generated by the test equipment can enable the first port of the network equipment to be in a data forwarding stopping state continuously, and compared with the way of sending the flow by 2 dozen 1 in the prior art when constructing the congestion state of the outlet port of the tester, the way of passing partial flow still exists, and the test result of the scheme is more accurate.

In order to execute the corresponding steps in the above method embodiments and each possible implementation manner, two implementation manners of the testing apparatus applied to the port cache values of the testing device and the network device respectively are given below.

Referring to fig. 9, fig. 9 is a schematic structural diagram of a testing apparatus 200 for port cache values according to an embodiment of the invention. The test apparatus 200 is applied to a test device, and includes: a flow control frame sending module 210, a message sending module 220, a data processing module 230 and a buffer message receiving module 240.

The flow control frame sending module 210 is configured to send a flow control frame to the network device according to a predetermined line speed, where the flow control frame carries a time parameter, and the time parameter is used to instruct the network device to stop sending data. The predetermined line speed corresponds to a data transmission rate of the network device.

The message sending module 220 is configured to continuously send the data message to the network device within the sending duration of the data message, so that the data message is stored in the port buffer of the network device.

The data processing module 230 is configured to stop sending the flow control frame after the data packet stops being sent.

The buffer message receiving module 240 is configured to receive a buffer data message in a port buffer area sent by the network device.

The data processing module 230 is further configured to determine a port cache value of the network device according to the cached data packet.

In this embodiment, the flow control frame sending module 210 may be used to implement the steps S100 and S110 and the sub-steps thereof, and for the detailed description of the flow control frame sending module 210, reference may be made to the detailed description of the steps S100 and S110. The message sending module 220 may be used to implement the step S120 and the sub-steps thereof, and for a detailed description of the message sending module 220, reference may be made to the detailed description of the step S120. The data processing module 230 may be used to implement the steps S130, S150 to S170 and their respective sub-steps described above, and for a detailed description of the data processing module 230 reference may be made to the detailed description of the steps S130, S150 to S170. The buffer message receiving module 240 may be used to implement the step S140 and the sub-steps thereof, and for a detailed description of the buffer message receiving module 240, reference may be made to the detailed description of the step S140.

Referring to fig. 10, fig. 10 is a schematic structural diagram of a device 400 for testing a port cache value according to an embodiment of the invention. The test apparatus 400 is applied to a network device, and the apparatus includes: a flow control frame receiving module 410, a message receiving module 420 and a buffer message sending module 430.

The flow control frame receiving module 410 is configured to receive a flow control frame sent by the test device according to a predetermined line speed, where the flow control frame carries a time parameter, and the time parameter is used to instruct the network device to stop sending data. The predetermined line speed corresponds to a data transmission rate of the network device.

The message receiving module 420 is configured to receive a data message continuously sent by the test device in a data message sending duration, and store the data message in the port buffer.

And the buffer message sending module 430 is configured to send all the buffer data messages in the port buffer area to the test device after the stop time is over, so that the test device determines the port buffer value of the network device according to the buffer data messages.

In this embodiment, the flow control frame receiving module 410 may be used to implement the step S210 and the sub-steps thereof, and the detailed description of the flow control frame receiving module 410 may be referred to the detailed description of the step S210. The message receiving module 420 may be used to implement the step S220 and its sub-steps described above, and for a detailed description of the message receiving module 420, reference may be made to the detailed description of the step S220. The buffer message sending module 430 may be used to implement the step S230 and the sub-steps thereof, and for a detailed description of the buffer message sending module 430, reference may be made to the detailed description of the step S230.

It will be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the testing apparatus 200 and the testing apparatus 400 described above may refer to the corresponding processes in the foregoing method embodiments, which are not repeated herein.

Referring to fig. 11, fig. 11 is a schematic structural diagram of an electronic device according to an embodiment of the present invention. The electronic device 300 may include a processor 310, a memory 320, and a bus 330, the processor 310 being coupled to the memory 320 by the bus 330.

The memory 320 may be used to store a software program, such as the test apparatus 200 shown in fig. 9 or the test apparatus 400 shown in fig. 10. The Memory 320 may be, but is not limited to, random access Memory (Random Access Memory, RAM), read Only Memory (ROM), flash Memory (Flash), programmable Read Only Memory (Programmable Read-Only Memory, PROM), erasable Read Only Memory (Erasable Programmable Read-Only Memory, EPROM), electrically erasable Read Only Memory (Electric Erasable Programmable Read-Only Memory, EEPROM), etc.

The processor 310 may be an integrated circuit chip with signal processing capabilities. The processor 310 may be a general-purpose processor including a central processing unit (Central Processing Unit, CPU), a network processor (Network Processor, NP), etc.; but also digital signal processors (Digital Signal Processing, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), field programmable gate arrays (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components.

The electronic device 300 may be the test device or a network device described above. Wherein the memory 320 stores machine readable instructions executable by the processor 310. The processor 310 executes machine-readable instructions to implement the method for testing port cache values disclosed in the above embodiments.

It is to be understood that the configuration shown in fig. 11 is illustrative only, and that electronic device 300 may also include more or fewer components than shown in fig. 11, or have a different configuration than shown in fig. 11. The components shown in fig. 11 may be implemented in hardware, software, or a combination thereof.

The embodiment of the invention also provides a computer readable storage medium, and a computer program is stored on the computer readable storage medium, and the computer program is executed by a processor to realize the method for testing the port cache value disclosed in the embodiment. The readable storage medium may be, but is not limited to: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, RAM, PROM, EPROM, EEPROM, FLASH magnetic disk or an optical disk.

In summary, the embodiments of the present invention provide a method, an apparatus, an electronic device, and a readable storage medium for testing a port buffer value, where a network device stops data transmission within a stop time by first transmitting a flow control frame according to a predetermined line speed, and then continuously transmitting a data packet to the network device. Because the network device receives the flow control frame all the time, the network device cannot forward the data message, and only can store the data message in the port buffer area. After the data message stops being sent, the flow control frame can be stopped being sent. And then the network equipment returns the cache data message of the port cache region, and finally the port cache value can be determined according to the cache data message, so that the finally obtained port cache value of the network equipment is ensured to be accurate.

The present invention is not limited to the above embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.

Claims

1. The method for testing the port cache value is characterized by comprising the following steps of:

stopping sending the flow control frame after the data message stops sending;

2. The method of claim 1, wherein the network device has a first port and a second port, wherein the time parameter is used to indicate a stop time for the first port to stop data transmission, and wherein the predetermined line speed corresponds to a data transmission rate of the first port;

3. The method according to claim 1 or 2, characterized in that the method is applied to a test device having a third port and a fourth port;

4. A method according to claim 3, further comprising, prior to the step of transmitting the flow control frame to the first port of the network device at the predetermined line speed:

5. The method of claim 1, further comprising, prior to the step of determining the port cache value of the network device based on the received data packets in the port cache region:

6. The method for testing the port cache value is characterized by comprising the following steps of:

7. The method of claim 6, wherein the method is applied to the network device, the network device having a first port and a second port, the time parameter being used to indicate a stop time for the first port to stop data transmission, the predetermined line speed corresponding to a data transmission rate of the first port;

8. The method of claim 6 or 7, wherein the test device has a third port and a fourth port;

when the port cache area is full, discarding the newly-entered data message;

and sending the cache data message to the third port.

9. A device for testing a port cache value, comprising:

10. A device for testing a port cache value, the device comprising:

11. An electronic device, comprising: a memory and a processor, the memory storing a computer program executable by the processor, the processor executing the computer program when the electronic device is running to implement the method of testing a port cache value according to any one of claims 1-5 or the method of testing a port cache value according to any one of claims 6-8.

12. A computer readable storage medium, characterized in that the computer readable storage medium stores a computer program, which is executed by a processor to implement the method of any one of claims 1 to 5 or the method of testing port cache values of any one of claims 6 to 8.